Author Topic: Soyuz-2-1b - Bion-M № 2 - Baikonur - August 20, 2025 (17:13:10.294 UTC)  (Read 101980 times)

Online catdlr

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The Space Pirate🏴‍☠️🥷🏻🚀
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The first minutes after landing: specialists open the Biona-M descent module to remove containers with living organisms and hand them over to scientists.

https://twitter.com/TheSpacePirateX/status/1968976755651211676
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Online catdlr

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afec7032 🇷🇺
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Roscosmos shows some views from inside the Bion-M №2 spacecraft, specifically from inside the mice container:

https://twitter.com/robert_savitsky/status/1958917596108988477
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Online owais.usmani

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Do we know how many of the mice and other animals survived the re-entry?

If I am not mistaken, in Bion-M-1 many mice died while the capsule was still in orbit.

Offline Svetoslav

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Do we know how many of the mice and other animals survived the re-entry?

If I am not mistaken, in Bion-M-1 many mice died while the capsule was still in orbit.

We do.

IMBP-RAN now reports that only 10 mice has died this time.

"The results: out of 75 mice, ten were missing. We are all satisfied with this result, especially the scientists and the flight organizers. The cause of death for these animals varies. These were male mice, aggressive animals with complex intragroup conflicts. The data, of course, hasn't been lost; we will learn at what stages and for what reason they died."

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A few images from the descent module (Roscosmos Telegram).

Offline ddspaceman

Katya Pavlushchenko
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First data on the #BionM №2 experiments: 65 of 75 mice returned back to Earth safely. The scientists from #IMBP believe it’s a good result, they will find out what and when happened to the mice who didn’t. The other experiments are in good condition too. https://t.me/imbp_ru/522

https://twitter.com/katlinegrey/status/1969053464119410709

Offline jcm

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Perigee has been lowered to 146 km a few days ago. So yes, it's coming back.

No space force TLEs since Sep 12 (indeed the last one showing it in a 147 x 486 km orbit).
Perhaps it already landed?

New TLE from today show Bion-M at 264x279 km @ 96,92°. So, the previous data from September 12th may have been erroneous (inclination @95,5°).

Yes, and there's a TLE set out now showing it in a ludicrously incorrect 465 x 3622 km x 102.8 deg orbit, no idea what Space Force are smoking these days...
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Offline jcm

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Using the final not-obviously-spurious TLE set, I get a landing near 0700 UTC, not 0800 UTC as implied by Roskosmos. Is it possible there's a time zone error by them?
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Jonathan McDowell
http://planet4589.org

Online Alter Sachse

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Perigee has been lowered to 146 km a few days ago. So yes, it's coming back.

No space force TLEs since Sep 12 (indeed the last one showing it in a 147 x 486 km orbit).
Perhaps it already landed?

New TLE from today show Bion-M at 264x279 km @ 96,92°. So, the previous data from September 12th may have been erroneous (inclination @95,5°).

Yes, and there's a TLE set out now showing it in a ludicrously incorrect 465 x 3622 km x 102.8 deg orbit, no idea what Space Force are smoking these days...
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Offline Steven Pietrobon

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Yes, and there's a TLE set out now showing it in a ludicrously incorrect 465 x 3622 km x 102.8 deg orbit, no idea what Space Force are smoking these days...

https://store.cigarsforwarriors.org/product/op-cigars-for-warriors-2024-space-force-fiesta-pin/
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Offline PM3

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Apogee x perigee / inclination

2025-08-20   346 x 190 / 96.9 °
2025-08-20   347 x 191
2025-08-21   -
2025-08-22   360 x 236  –  Bion-M2 raising perigee from 191 to 355 km
2025-08-22   375 x 355
2025-08-23   -
2025-08-24  -
2025-08-25   374 x 355
2025-08-25   374 x 356
2025-08-26   374 x 356
2025-08-27   374 x 356
2025-08-28   374 x 356
2025-08-29   374 x 356
2025-08-30   375 x 360
2025-08-31   375 x 360
2025-09-01   375 x 360
2025-09-02   375 x 359
2025-09-03   375 x 359
2025-09-04   375 x 359
2025-09-05   374 x 358
2025-09-06   374 x 358
2025-09-07   374 x 358
2025-09-08   374 x 358
2025-09-09   374 x 358
2025-09-10   374 x 357
2025-09-11   374 x 357
2025-09-12   374 x 357 / 96.9 °
2025-09-12   485 x 146 / 95.5 °  –  space surveillance glitch
2025-09-13   -
2025-09-14   -
2025-09-15  -
2025-09-16   -
2025-09-17  280 x 264 / 96.9 °  –  Bion-M2 (?) flying in a lower orbit
2025-09-18  279 x 264 / 96.9 °
2025-09-19  278 x 263 / 96.9 °
2025-09-19  3622 x 457 / 102.8 °  –  space surveillance glitch
2025-09-20  2450 x 1555 / 88.3 °

No other 2025-185 object was catalogued than Bion-M2 and the Soyuz upper stage.

Looks like space surveillance went crazy when Bion-M2 started lowering its orbit on September 12, and then again when the reentry capsule separated on September 19.
« Last Edit: 09/21/2025 08:35 pm by PM3 »
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