Author Topic: Shiyan-10 - CZ-3B/G2 - Xichang - September 27, 2021 (08:20 UTC) (Read 41581 times)

Galactic Penguin SST · « **Reply #20 on:** 09/27/2021 09:16 am »

Quote from: Satori on 09/27/2021 09:08 am

Cargo apparently is the Test Satellite n.º 10.

Yes, but the message mentioning Shiyan 10 has been deleted for now. Let's see what's going on...

Galactic Penguin SST · « **Reply #21 on:** 09/27/2021 09:30 am »

From https://m.weibo.cn/detail/4686089002424941:

Satori · « **Reply #22 on:** 09/27/2021 09:51 am »

Still no official confirmation of launch success?

Conexion Espacial · « **Reply #23 on:** 09/27/2021 09:53 am »

Quote from: Satori on 09/27/2021 09:51 am

Still no official confirmation of launch success?

Nothing yet, it's weird, I thought it would be delayed because it has the Yz-1S upper stage but it seems it doesn't, it's starting to be rare.

Galactic Penguin SST · « **Reply #24 on:** 09/27/2021 09:57 am »

Quote from: Conexion Espacial on 09/27/2021 09:53 am

Quote from: Satori on 09/27/2021 09:51 am
Still no official confirmation of launch success?
Nothing yet, it's weird, I thought it would be delayed because it has the Yz-1S upper stage but it seems it doesn't, it's starting to be rare.

Well they don't specially mark the usage of upper stages on the CZ-3 series' exterior nowadays so it's still possible.

Time to check for US orbital tracking data...

Galactic Penguin SST · « **Reply #25 on:** 09/27/2021 11:22 am »

More photos from https://m.weibo.cn/detail/4686106433945731 - still not sure what's going on (could be use of upper stage or...something else).

18SPCS has tracking data for KZ-1A launch, but not this one yet.

Galactic Penguin SST · « **Reply #26 on:** 09/27/2021 11:51 am »

Apparently observations of an object in night sky fitting with rocket stage venting fuel has been observed over Sydney Australia after 08:40 UTC, which is under the launch track. That means the rocket was still functioning by that time.

https://twitter.com/football_roos/status/1442453715496026119?s=19

Satori · « **Reply #27 on:** 09/27/2021 11:59 am »

Was that a rumor on 9ifly about a possible problem with the satellite?

Galactic Penguin SST · « **Reply #28 on:** 09/27/2021 12:09 pm »

Quote from: Satori on 09/27/2021 11:59 am

Was that a rumor on 9ifly about a possible problem with the satellite?

No, I just take a look at the rumours and they said:

* "The orbit's a bit special, be patient"
* "CALT's job is done"

That probably means either there's an upper stage on top not built by CALT, or it will self-propel itself to its final orbit.
If it's going to something like inclined geosynchronous or Molniya orbit with orbit raising at apogee, the launch sequence is gonna be 5+ hours long.

ZachS09 · « **Reply #29 on:** 09/27/2021 01:39 pm »

I saw some nitrogen tetroxide leaking from one of the boosters in the launch closeup video. Is that normal?

Galactic Penguin SST · « **Reply #30 on:** 09/27/2021 01:48 pm »

Quote from: ZachS09 on 09/27/2021 01:39 pm

I saw some nitrogen tetroxide leaking from one of the boosters in the launch closeup video. Is that normal?

Normal venting of tanks for regulating tank/pipe pressure IIRC. For those using hypergolic propellant you can also see this on rockets like the Titan or the Proton.

Liss · « **Reply #31 on:** 09/27/2021 01:57 pm »

The 9ifly topic is gone.

Satori · « **Reply #32 on:** 09/27/2021 02:25 pm »

More than seven hours have gone since the launch and still no official information about it whatsoever, and also no objects tracked in orbit... well...

input~2 · « **Reply #33 on:** 09/27/2021 02:34 pm »

Launch video

Alter Sachse · « **Reply #34 on:** 09/27/2021 02:52 pm »

Quote from: Satori on 09/27/2021 02:25 pm

More than seven hours have gone since the launch and still no official information about it whatsoever, and also no objects tracked in orbit... well...

That does not sound good.

Galactic Penguin SST · « **Reply #35 on:** 09/27/2021 05:31 pm »

We have first orbital elements from this LM-3B launch via 18SPCS:

2021-087A/49258: 177 x 40104 km x 51.04 deg.

That...doesn't look like anything out of the ordinary for an inclined geosynchronous transfer orbit.🤔🤔🤔

jcm · « **Reply #36 on:** 09/27/2021 05:41 pm »

Quote from: Galactic Penguin SST on 09/27/2021 05:31 pm

We have first orbital elements from this LM-3B launch via 18SPCS:

2021-087A/49258: 177 x 40104 km x 51.04 deg.

That...doesn't look like anything out of the ordinary for an inclined geosynchronous transfer orbit.🤔🤔🤔

However: 51 deg is a little lower inc than the 54-55 deg used for previous Chinese IGSO launches.
Also, they used the YZ stage to reach that apogee, we'd expect stage 3 to be in a 18000-19000 km apogee
orbit if that is the case today; but if no YZ stage was used, that's a new profile for the CZ-3B.

Galactic Penguin SST · « **Reply #37 on:** 09/27/2021 05:44 pm »

Quote from: jcm on 09/27/2021 05:41 pm

Quote from: Galactic Penguin SST on 09/27/2021 05:31 pm
We have first orbital elements from this LM-3B launch via 18SPCS:

2021-087A/49258: 177 x 40104 km x 51.04 deg.

That...doesn't look like anything out of the ordinary for an inclined geosynchronous transfer orbit.🤔🤔🤔

However: 51 deg is a little lower inc than the 54-55 deg used for previous Chinese IGSO launches.
Also, they used the YZ stage to reach that apogee, we'd expect stage 3 to be in a 18000-19000 km apogee
orbit if that is the case today; but if no YZ stage was used, that's a new profile for the CZ-3B.

The thing is that the Beidou connection is tenuous at best (I'm not even sure those claiming it are basing on anything other than NOTAMs), there was a "launch poster" leaked out about 45 minutes after launch thst called it Shiyan 10, but got deleted really quickly.

Alter Sachse · « **Reply #38 on:** 09/27/2021 05:50 pm »

40000 km gives an orbital period of 12 hours, similar to Molniya. (or "Oko" early warning)

Josh_from_Canada · « **Reply #39 on:** 09/27/2021 06:48 pm »

An object was cataloged in orbit but no official confirmation has been released. Maybe the payload failed after separation similar to the ChinaSat-18 spacecraft. If a second object isn't cataloged, maybe it didn't separate from the rocket at all. Launch vehicle failure can be ruled out if there's a CZ-3B launch in October. I doubt there was a YZ-1 upper stage used on this launch as there was no markings for it on the second stage. We're going to have to wait and see if this object preforms any maneuvers or not.

edit: A second object, 49259, was cataloged in a 209 km x 39591 km x 51.35° orbit. This shows that the launch vehicle did it's job and no YZ-1 was used.