Kosmos-2572 Razdan N°1 (14F156) - Soyuz-2.1b - Plesetsk 43/4 - Nov 25 2023 (20:58:06 UTC)

[russianhalo117]

Cross post regarding a potential upcoming Bars-M launch towards the end of November 2023:

https://twitter.com/M51_4ever/status/1725256226739757131

[Nicolas PILLET]

As far as I understand, we have no confirmation that it is a Soyuz-2 launch. It could be an Angara launch too, but I don't know if the drop zones match this hypothesis...

[Alter Sachse]

There was an announcement for an Angara 1.2 in November with 6 Rodnik.
But the orbit inclination would not fit or would have been changed for the new satellites.

[B. Hendrickx]

Here is the NOTAM:

NAVAREA XIX 156/23
BARENTS SEA
1.AREA TEMPORARILY DANGEROUS TO NAVIGATION
DUE TO ROCKET CARRIER ELEMENTS FALL
23 TO 27 NOV DAILY FROM 2000 TO 2230 UTC

A. 76-30.0N 022-00.0E
B. 75-20.0N 024-40.0E
C. 74-50.0N 021-40.0E
D. 75-50.0N 018-40.0E
E. 76-30.0N 022-00.0E

2. CANCEL THIS MESSAGE 272230 NOV 23

These coordinates are indeed identical to those for preceding Bars-M launches (they're for core stage impact). The length of the launch window (2.5 hours) is also the same. So Bars-M (14F148) nr. 5 definitely is the most likely payload. This is the third of a batch of four Bars-M satellites (serial numbers 3 to 6) ordered in 2014. No further orders are known to have been placed.

Other military imaging satellites still awaiting launch are a trio of small VNIIEM satellites (probably Razbeg) and the big Razdan spy satellite of RKTs Progress. All of these are long overdue. 

[Alter Sachse]

An unusual launch time for an optical satellite...

[B. Hendrickx]

An unusual launch time for an optical satellite...

The two currently operational Bars-M satellites (Kosmos-2556 and 2567) have passes over Plesetsk tomorrow around 21.45 and 21.15 UTC. Their orbital planes are separated by about 25°. Assuming there will be a similar spacing for the orbital plane of the next one, the announced 20.00-22.30 UTC launch window makes sense for a Bars-M launch.

The Russian Ministry of Defense today published a NOTAM for first stage impact in the Barents Sea. That also is the same as for earlier Bars-M launches. So everything points in the direction of Bars-M N°5, but we love to be surprised:-)

[Galactic Penguin SST]

Insider claims that the launch is on November 25 (allowed by the marine navigation warnings and NOTAMs, the later listed below) AND the payload is not Bars.

Related air space closure notices:

A6737/23 NOTAMN
Q) ENOB/QRDCA/IV/BO /W /000/999/7540N02149E051
A) ENOB B) 2311232000 C) 2311272230
D) DAILY 2000-2230
E) TEMPO DANGER AREA 'RUS SPACE LAUNCH AREA NOV23' ACTIVATED. PSN
763000N 0220000E - 752000N 0244000E - 745000N 0214000E - 755000N
0184000E - (763000N 0220000E). IMPACT AREA FOR RUSSIAN MISSILES.
SIMILAR ACTIVITIES ARE ALSO PLANNED WITHIN THE UNALLOCATED
INTERNATIONAL AIRSPACE IN PSN 705600N 0320500E - 701000N 0320500E -
700928N 0320152E - 701500N 0315000E - 703007N 0315000E - 703622N
0314318E - (705600N 0320500E).
F) GND G) UNL

A6781/23 NOTAMN
Q) ENOB/QRDCA/IV/BO /W /000/999/7540N02149E051
A) ENOB B) 2311282000 C) 2311302230
D) DAILY 2000-2230
E) TEMPO DANGER AREA  'RUS SPACE LAUNCH AREA NOV23'  ACTIVATED. PSN
763000N 0220000E - 752000N 0244000E - 745000N 0214000E - 755000N
0184000E - (763000N 0220000E). IMPACT AREA FOR RUSSIAN MISSILES.
SIMILAR ACTIVITIES ARE ALSO PLANNED WITHIN THE UNALLOCATED
INTERNATIONAL AIRSPACE IN PSN 705600N 0320500E - 701000N 0320500E -
700928N 0320152E - 701500N 0315000E - 703007N 0315000E - 703622N
0314318E - (705600N 0320500E)
F) GND G) UNL

[B. Hendrickx]

Insider claims that the launch is on November 25 (allowed by the marine navigation warnings and NOTAMs, the later listed below) AND the payload is not Bars.

The drop zones are probably standard for Soyuz-2.1a/2.1b launches into polar orbit. The only payload launched by these rockets into polar orbit from Plesetsk in recent years has been Bars-M, but, as I mentioned in an earlier post here, there are two new types of imaging satellites that are long overdue:

1) a trio of small reconnaissance satellites built by VNIIEM. They were identified as MKA ("small satellite") 1, 2 and 3 in a VNIIEM presentation that ended up online in the middle of last year and were then supposed to fly in the second half of 2022. It wasn't specifically stated that they would be launched together, but that would seem to be the most logical conclusion. Most likely, these are the satellites named Razbeg in several procurement and court documents. They could be similar or identical to Khayyam, the satellite that VNIIEM built for Iran and was launched from Baikonur in August 2022. A patent related to Khayyam showed three of these satellites mounted on a single Soyuz-2 rocket.

 
2) the first of two Razdan satellites, big spy satellites built by RKTs Progress that are supposed to replace the Persona satellites. They are presumably equipped with a 2.4 m mirror. There has been no indication in recent years when they could be ready to fly. It is not even certain if they will fly on the Soyuz-2.

 

[B. Hendrickx]

https://tass.ru/kosmos/19380179

TASS reports a Soyuz-2-1b rocket launched a military satellite at 23.58 Moscow time (20.58 UTC). No further details so far.

[patchfree]

Success!


TASS.

[B. Hendrickx]

Success!


TASS.

Standard launch announcement saying that the satellite has been successfully placed into orbit and that contact has been established with it by the Titov control center. Usually this announcement also includes the name of the satellite, but not this time.

They mention a single satellite, so the trio of VNIIEM satellites can be ruled out. The use of the Soyuz-2-1b points to a heavy payload, leaving the first Razdan (14F156 N°1) as the most likely candidate right now. There were some indications that Razdan may fly in an elliptical orbit like America's KH-11 spy satellites, so it'll be interesting to see what the NORAD data tell us. We're not likely to get anything more from the Russians. 

[Galactic Penguin SST]

Via https://t.me/roscosmos_gk/11623 - the triangular lightning towers points to Site 43/4 being used.

https://twitter.com/Cosmic_Penguin/status/1728622600291749932

[Satori]

https://celestrak.org/NORAD/elements/table.php?INTDES=2023-182

[zubenelgenubi]

Success!
TASS.

...it'll be interesting to see what the NORAD data tell us. We're not likely to get anything more from the Russians.

And the observations of the amateur astronomer/satellite observer community.

https://celestrak.org/NORAD/elements/table.php?INTDES=2023-182

[input~2]

ORIGINATOR    "18 SPCS" OBJECT_NAME    "COSMOS 2571" OBJECT_ID    "2023-182A" EPOCH    "2023-11-26T09:06:07.377984" INCLINATION    "96.6264" RA_OF_ASC_NODE    "72.5389" ARG_OF_PERICENTER    "64.1253" NORAD_CAT_ID    "58435" PERIOD    "90.750" APOAPSIS    "321.646" PERIAPSIS    "301.039"

Moderator update given western governmental agency receipt of spacecraft designation I have updated the thread title to reflect the newly updated designation until further notice.

[russianhalo117]

Liftoff 20:58:06 UTC from pad 43/4 according to this video:

[Satori]

Success!


TASS.

Standard launch announcement saying that the satellite has been successfully placed into orbit and that contact has been established with it by the Titov control center. Usually this announcement also includes the name of the satellite, but not this time.

They mention a single satellite, so the trio of VNIIEM satellites can be ruled out. The use of the Soyuz-2-1b points to a heavy payload, leaving the first Razdan (14F156 N°1) as the most likely candidate right now. There were some indications that Razdan may fly in an elliptical orbit like America's KH-11 spy satellites, so it'll be interesting to see what the NORAD data tell us. We're not likely to get anything more from the Russians. 

Bart, do you have any comment regarding this launch? Your analysis would be very appreciated.

[russianhalo117]

Success!


TASS.

Standard launch announcement saying that the satellite has been successfully placed into orbit and that contact has been established with it by the Titov control center. Usually this announcement also includes the name of the satellite, but not this time.

They mention a single satellite, so the trio of VNIIEM satellites can be ruled out. The use of the Soyuz-2-1b points to a heavy payload, leaving the first Razdan (14F156 N°1) as the most likely candidate right now. There were some indications that Razdan may fly in an elliptical orbit like America's KH-11 spy satellites, so it'll be interesting to see what the NORAD data tell us. We're not likely to get anything more from the Russians. 

Bart, do you have any comment regarding this launch? Your analysis would be very appreciated.

I believe per discussions with others we are all waiting on seeing if it maneuvers to an operational orbit or deploys any covers.

[B. Hendrickx]

Bart, do you have any comment regarding this launch? Your analysis would be very appreciated.

I believe per discussions with others we are all waiting on seeing if it maneuvers to an operational orbit or deploys any covers.

Yes, let's wait a little to see what it does. It'll have to do something to prevent it from re-entering, especially with the high solar activity we're witnessing now. I'm still looking at a number of options to explain this one. One problem is the relatively small payload fairing used for this launch. I'll try to write down something more substantial one of the coming days.   

[owais.usmani]

Still no maneuver, orbit is gradually decreasing

297 x 317 km x 96.6°

[B. Hendrickx]

My best guess right now is that Kosmos-2571/2572 (whatever it will ultimately be called) is the first Razdan satellite (14F156 N°1), but that instead of being a big KH-11 class satellite, it has a smaller optical payload that is identical or very similar to that to be flown on the Resurs-PM satellites.

I earlier discussed Razdan here:
https://forum.nasaspaceflight.com/index.php?topic=49654.0
https://www.thespacereview.com/article/4006/1

Based on what was known then, I concluded that Razdan was a big KH-11 class spy satellite carrying a telescope with a 2.35 m primary mirror. The problem with that is that the Soyuz-2-1b rocket used for this launch had a relatively small payload fairing (see attachment 1), not the big one that is usually placed on top of this rocket. The big fairing has been used even for satellites that should be significantly smaller such as Persona, Lotos-S and Pion-NKS (see a picture of a Soyuz-2-1b with a Persona spy satellite in attachment 2). It is hard to imagine that a satellite with a 2.35 m telescope could fit inside the smaller fairing, so we can virtually rule out that this is the payload launched last week.

Razdan: a two-stage project

It now looks like Razdan is a project that will be conducted in two stages, with the big KH-11 class satellites appearing only in the second phase. This is actually what was claimed in an article that appeared in the Kommersant newspaper in July 2016 (back in those days it was still possible for that kind of sensitive information to occasionally leak in the Russian press):
https://www.kommersant.ru/doc/3049019

The article’s author (the usually well-informed Ivan Sarfonov) wrote that the 2+m telescope (developed by the Krasnogorsk Mechanical Plant or KMZ) would be introduced on the third satellite, implying that the first two satellites would carry another, smaller optical payload. He did not specify what kind of payload, although he hinted that its manufacturer might be LOMO, an optical company based in St.-Petersburg. At the time, the first two satellites were expected to be launched in 2019 and 2022 and the third one (with the KMZ telescope) in 2024.

Razdan’s optical payload is referred to in several documents as Sevan. This name first appeared in procurement documentation in late 2014, several months after RKTs Progress was awarded the contract for Razdan by the Ministry of Defense on June 19, 2014. Two companies were assigned to work out the preliminary design for Sevan at that time, namely KMZ and LOMO. For some reason, the Ministry of Defense awarded a second contract to RKTs Progress for Razdan on September 26, 2016. Then, four days later, the MoD signed a direct contract for Sevan with KMZ. It is known from procurement documents that under that contract KMZ was to develop a telescope with a primary mirror of 2.35 m (as well as a secondary and tertiary mirror). The mirrors themselves were to be produced by the Lytkarino Optical Glass Factory (LZOS).

My interpretation of all this was that KMZ and LOMO were initially ordered to forward competitive proposals for Sevan and that the ultimate choice fell on the KMZ proposal in September 2016 (which was after Sarfonov wrote his article). Also, there was no sign of LOMO in documentation related to Razdan after 2014. 

The use of the smaller payload fairing for last week’s launch now indicates that the plans mentioned in Kommersant in 2016 did not change after all. It looks like LOMO was assigned to build a smaller optical payload for the first satellites and that KMZ’s big 2+meter telescope will fly at a later stage (so Sevan appears to be a generic name for two different optical payloads developed under Razdan).

The link with Resurs-PM

There is evidence that the LOMO telescope is very similar or identical to the 1.5 m telescope that the company is building for Resurs-PM, the next-generation Resurs-P satellites. The Resurs-PM project officially got underway on October 27, 2016 with a contract awarded by Roscosmos to RKTs Progress. In the original plans, Resurs-PM was to carry three payloads:

-OEK-VR:  a high-resolution payload with a 1.23 m telescope. LOMO had actually started the development of this telescope back in 2010 under a Roscosmos R&D project known as Pribor-OEK. 
-ShMARS: a  medium-resolution payload
-a hyperspectral payload

As can be determined from documentation published on Russia’s government procurement website, the Resurs-PM project underwent significant changes in late 2018. The launch of the satellites was moved from Vostochnyy to Plesetsk, a clear sign that the project was being partially militarized. The documentation refers to a decision made on September 27, 2017 under which several Roscosmos projects, including Resurs-PM, would be carried out on the basis of “technical documentation provided by the Ministry of Defense”. My understanding is that Roscosmos is still the organization officially in charge of Resurs-PM, but that the MoD is playing a major role behind the scenes.

Under the new plans, the high-resolution payload built as part of Pribor-OEK was to be replaced by one “based on a high-resolution electro-optical observation satellite with a 1.5 m primary mirror” (in another passage it is called “an analogous satellite”). The medium-resolution payload was replaced by another one (ShOK-PM) and the hyperspectral payload was dropped. It is quite probable that the “analogous satellite" with the 1.5 m mirror is Razdan and that as part of Resurs-PM’s partial militarization it was decided to incorporate this telescope into Resurs-PM. Using the same telescope on both Razdan and Resurs-PM obviously also saves costs.

Resurs-PM’s new high-resolution payload retained the name OEK-VR, but in a handful of sources it is also called Elegia. In one court document related to Resurs-PM (which also refers to 14F156, the index for Razdan), it appears to be named 201OE81. The OEK-VR payload is seen in attachment 3. The main difference with the earlier planned telescope is the slightly bigger primary mirror (1.5 m vs. 1.23 m) and the larger focal length (15.8 vs. 15.6 m). It is a so-called Ritchey-Chrétien telescope with hyperbolic primary and secondary mirrors.

OEK-VR has one panchromatic channel and eight multispectral channels covering the spectral range from 0.4 to 1.05 microns. Resurs-PM is supposed to be placed into a circular orbit at an altitude of around 700 km (although orbits as low as 450 km are also being considered). From an altitude of 700 km, the maximum resolution of the panchromatic and multispectral channels (at nadir) are 0.4 m and 1.6 m respectively. Assuming Razdan has the same telescope, its resolution from an altitude of 300 km must undoubtedly be even more impressive, possibly close to what is generally considered to be the maximum resolution that can be theoretically achieved by a remote sensing satellite (0.15 m). Resurs-PM’s optical payload is also designed to observe other orbiting satellites, so Razdan may very well be used for space situational awareness tasks as well.

Another sign that Razdan and Resurs-PM share the same 1.5 m telescope is that they use the same CCDs (produced by NPP Elar). These are called Kem-PKh (pixel size 9x9 µm2) for the panchromatic channel and Kem-MS (pixel size 18x18 µm2 ) for the multispectral channels.  The manufacturer of the primary mirror is most likely LZOS, the same company that develops the bigger 2.4 m mirror.  In a newsletter published by LZOS in late 2018, it was reported that it had delivered two 1.54 m mirrors to LOMO. These are almost certainly the primary mirrors for Razdan N°1 and 2 (by that time the decision to fly these mirrors on Resurs-PM hadn’t even been made). There is at least one online picture of the mirror (see attachment 4). LZOS has a long tradition of building 1.54 m mirrors for LOMO. Mirrors of that size were provided for the two Araks-V satellites (Kosmos-2344 and 2392), launched in 1997 and 2002 (which also used the two-mirror Ritchey-Chrétien configuration) and for the three Persona satellites (Kosmos-2441, 2486 and 2506) (which used the three-mirror Korsch configuration). While the inherent resolving power of Razdan’s telescope may not be significantly higher than that of Persona, it should still obtain more detailed images thanks to its lower orbit (300 km vs. the 750 km orbits of Persona).   

In an earlier LZOS newsletter published in 2014 it was said that Razdan would “most likely” carry a silicon carbide mirror with a diameter of “at least 1.5 m”, which should pave the way to building similar mirrors with diameters of up to 3-4 m. However, later publications by LZOS on silicon carbide mirrors gave no indication that they had reached a stage of maturity where they could have been delivered to the customer in late 2018. Presumably, the mirrors use a cheaper material that has been traditionally used in Russian ground-based and space-based mirrors, namely SO-115 or Sitall (a crystalline glass-ceramic material). LOMO had also studied silicon carbide as an option for the smaller 1.23m telescope originally envisaged for Resurs-PM, but those plans do not seem to have materialized either.

One lingering problem is the limited ability to send imagery to the ground via geostationary data relay satellites. Only one military data relay satellite (Garpun/14F136 nr. 12L/Kosmos-2513) is currently operational and it has been in orbit for nearly eight years. ISS Reshetnev is working on a new generation of military data relay satellites (probably named Gerakl), but it is not known when they will be ready to fly. The Ministry of Defense seems to be counting on those new data relay satellites for Resurs-PM as well. As can be deduced from the documents dealing with the project’s militarization, the satellites will be able to work in conjunction not only with Roscosmos’ Luch satellites, but also with military data relay satellites that will enable them to downlink pictures less than one hour after they are made.   

Razdan’s bus is probably very similar to that of Resurs-PM. As is known from procurement documents, it has an engine unit (14D520) that has also been flown on other Resurs type satellites. It does look, though, like the bus has been adapted to fly in very low orbits, namely by outfitting it with an electric propulsion system (presumably a first for an optical reconnaissance satellite). This is known from procurement documents for Razdan that mention xenon tanks for such a propulsion system that were produced by NIIMash in Nizhnyaya Salda. The manufacturer of the electric propulsion system itself is not known (presumably OKB Fakel or the Keldysh Research Center). The electric thrusters alone will presumably be not enough to counter the aerodynamic drag that the satellite will experience if it remains at its current low altitude, but should help save at least some precious propellant for the liquid-fuel propulsion system. Razdan also has control moment gyroscopes (SGK-250) that provide attitude control without the need to consume propellant. 

Assuming Razdan is similar to Resurs-PM, it should have a mass of at least 6.5 tons (the latest available data for Resurs-PM is that it will weigh somewhere between 6.415 and 6.615 tons). The use of the Soyuz-2-1b for last week’s launch indicates the mass of the satellite is indeed somewhere in that range. According to data from RKTs Progress, the maximum payload capacity of the Soyuz-2-1a and Soyuz-2-1b to a 200 km, 98.3° orbit from Plesetsk is 5.9 and 6.9 tons respectively, so the mass of Kosmos-2571/2572 should be between those two values.

One final question is whether even a satellite with a 1.5 mirror fits inside the payload fairing used by the Soyuz-2-1b for this launch. After all, Persona, which also has a 1.5 m telescope, used a Soyuz-2-1b with the wider fairing. It should be pointed out, however, that the smaller fairing was also used for the launch of Resurs-P1 and Resurs-P3, which were also launched by the Soyuz-2.1b. Resurs-P2 used the bigger fairing because it had a scientific payload (Nuklon) attached to its side. A picture of a Resurs-P inside the smaller fairing can be seen in the attached image from Nicolas Pillet’s website (see attachment 5). The exact dimensions of Resurs-PM are not known, but if they don’t differ significantly from those of Resurs-P, it should also fit inside the smaller fairing (see attachments 6 and 7 for a comparison of Resurs-P and Resurs-PM). If Razdan is about the same size as Resurs-PM, the same would, of course, apply to that satellite as well.   

The KH-11 class satellites

As for the status of the 2.35 m telescope, the latest available update came in the annual report of LZOS for 2020, which said primary, secondary and tertiary mirrors for Sevan had been delivered to “the customer” (what must be KMZ). Whether those are flight-rated mirrors is not at all certain. The Sevan contract awarded to KMZ in September 2016 was for a so-called “NIR” (research project), not an “OKR” (development project). Moreover, LZOS’ annual report for 2017 mentioned the construction of mirrors for an experimental version of an optical complex with a 2+m mirror, most likely a reference to the Sevan telescope for the big KH-11 class satellite. 

It is not even clear if the MoD has awarded a contract to RKTs Progress for the construction of the bigger spacecraft. As far as is known from publicly available sources, only 14F156 N°1 and 2 were part of the two Razdan contracts awarded by the MoD in 2014 and 2016. Since the bigger satellites should differ significantly from the first two ones, they may even get a new 14F index. It is even questionable if they can be made light and compact enough to be launched by the Soyuz-2-1b. Analogous US satellites have been launched by the Titan-4 and the Delta Heavy, so the big KH-11 class satellites may require the lifting power of the Angara-A5. They are not likely to fly until the second half of this decade.

Judging from the 2016 Kommersant article, the bigger KH-11 class satellites are still considered part of the Razdan project. Actually, Razdan appears to be a more general name for new-generation photographic reconnaissance satellites. It is also seen in documentation related to Kosmos-2525, the small experimental photoreconnaissance satellite of VNIIEM launched in March 2018. This has been referred to in documentation both as EMKA (“experimental small satellite”) and Razdan-N.   

The new spy satellite is a long-awaited addition to Russia’s fleet of military imaging satellites and should significantly enhance the country’s intelligence-gathering capabilities from orbit. Indications are that only one of the high-resolution Persona satellites (Kosmos-2506) is still operational. It performed its latest orbit correction as recently as June this year. Russia may also be receiving high-resolution imagery from Khayyam, the satellite that VNIIEM built on a turnkey basis for Iran. In addition to that, Russia operates two Bars-M military topographic mapping satellites with lower resolution payloads. Radar imagery is presumably being provided by NPOMash’s Neitron satellite (14F01-01 or Kosmos-2553) and it is very well possible that at least some of the radar imagery from the recently launched Kondor-FKA satellite is also being used for military purposes.

[B. Hendrickx]

One final question is whether even a satellite with a 1.5 mirror fits inside the payload fairing used by the Soyuz-2-1b for this launch. After all, Persona, which also has a 1.5 m telescope, used a Soyuz-2-1b with the wider fairing. It should be pointed out, however, that the smaller fairing was also used for the launch of Resurs-P1 and Resurs-P3, which were also launched by the Soyuz-2.1b. Resurs-P2 used the bigger fairing because it had a scientific payload (Nuklon) attached to its side. A picture of a Resurs-P inside the smaller fairing can be seen in the attached image from Nicolas Pillet’s website (see attachment 5). The exact dimensions of Resurs-PM are not known, but if they don’t differ significantly from those of Resurs-P, it should also fit inside the smaller fairing (see attachments 6 and 7 for a comparison of Resurs-P and Resurs-PM). If Razdan is about the same size as Resurs-PM, the same would, of course, apply to that satellite as well. 

It turns out that Resurs-PM will indeed use the smaller payload fairing (named 17S13A7). This is confirmed in Roscosmos procurement documentation for 2017 that appeared on Russia's government procurement website. This means that if Razdan has the same design as Resurs-PM (as now looks fairly likely), it could fit inside the fairing used for the November 25 launch (which was 17S13A7).

Although Persona also has a 1.5 m telescope (like Resurs-PM), it did use the bigger payload fairing. There is at least one difference between the bus of the Persona and Resurs satellites. Persona's solar panels are mounted parallel (and not perpendicularly) to the satellite's body (more or less like the solar panels on the Hubble Space Telescope). This can be seen in a fuzzy ground-based image of the first Persona satellite (Kosmos-2441) as well as in a patent that describes the unfurling mechanism of Persona's solar panels (it refers to 14F137, the satellite's military index).
https://patents.s3.yandex.net/RU2422334C1_20110627.pdf

Still, it is not clear if this played a role in the choice of the bigger fairing for Persona. After all, the solar panels of the Resurs satellites are in a similar configuration when stowed for launch under the payload fairing.

[Alter Sachse]

Still no maneuver, orbit is gradually decreasing

Current data

96.62° 90.55 min 291x312 km

[B. Hendrickx]

Recently released documentation makes it possible to conclude with a high degree of certainty that Kosmos-2572 is not RKTs Progress’ heavy Razdan optical reconnaissance satellite, as speculated here earlier. More in the Razdan program thread (Reply 12):
https://forum.nasaspaceflight.com/index.php?topic=49654.0

The use of the Soyuz-2.1b for the launch of Kosmos-2572 suggests it is in the 6-7 ton range. It behaves like an optical reconnaissance satellite, making regular orbit corrections, as seen in the attached graph posted on the NK forum. RKTs Progress is not known to have worked on any other big optical reconnaissance satellites than Razdan, neither is it likely to have done so. Right now Kosmos-2572 must be categorized as unexplained. 

PS: Kosmos-2571 should be changed into Kosmos-2572 in the thread title.