Quote from: Galactic Penguin SST on 06/19/2017 10:52 amOrbit data now in:42763/2017-035A: 193 x 16357 km x 25.68 deg.42764/2017-035B: 192 x 16358 km x 25.68 deg.I'm not even sure that's salvageable.... That would make a dV to GEO of ~2100 m/s. Assuming a standard GTO with dV~1700 m/s, there is a ~400 m/s shortfall. This is about the dV budget for 8-10 years of GEO orbit- and station-keeping. Unless they can come up with creative ways of salvaging the orbit at the expense of less lifetime/fuel (à la Asiasat 3), it looks like a major loss. Of course, this bird may not be insured being a Government payload, so maybe they'll try to squeeze as much life out of it as they can, rather than ditch it to claim the insurance money.
Orbit data now in:42763/2017-035A: 193 x 16357 km x 25.68 deg.42764/2017-035B: 192 x 16358 km x 25.68 deg.I'm not even sure that's salvageable....
I calculate that you'd need 545 m/s to change this orbit into one with a standard GTO apogee of 35870 km,a rather bigger shortfall that your calculation.It would require a further 175 m/s to reach the 49600 km supersync apogee used by this mission's elder sibling, ZX-9.
Quote from: Galactic Penguin SST on 06/19/2017 10:52 amOrbit data now in:42763/2017-035A: 193 x 16357 km x 25.68 deg.42764/2017-035B: 192 x 16358 km x 25.68 deg.I calculate that you'd need 545 m/s to change this orbit into one with a standard GTO apogee of 35870 km,a rather bigger shortfall that your calculation.
Orbit data now in:42763/2017-035A: 193 x 16357 km x 25.68 deg.42764/2017-035B: 192 x 16358 km x 25.68 deg.
if I understand correctly:ZX-9A the latest orbital parameters: 251 x 17090 km; 26.8 °(Thank you, Google-translator !) https://twitter.com/cnspaceflight/status/877370968498241536
Quote from: Galactic Penguin SST on 06/18/2017 11:20 pmNot sure how credible but here's a rumor of lower orbit than planned but the satellite's healthy.More rumors, this time from the "coughing guy" who was apparently on site: - seems like the rocket 3rd stage might have some attitude control problems of unknown source, based on telemetry he saw at the LCC- satellite propellant usage for making up the shortfall "might be huge"
Not sure how credible but here's a rumor of lower orbit than planned but the satellite's healthy.
Full article: https://mp.weixin.qq.com/s/xmhpqx6XsXnFwBx0P47n3w
Quote from: SmallKing on 06/21/2017 02:08 pmFull article: https://mp.weixin.qq.com/s/xmhpqx6XsXnFwBx0P47n3wAccording to the same interview, reaching final orbit will take 20 days and satellite lifetime could be 5 years down from 15 years
Quote from: input~2 on 06/21/2017 02:42 pmQuote from: SmallKing on 06/21/2017 02:08 pmFull article: https://mp.weixin.qq.com/s/xmhpqx6XsXnFwBx0P47n3wAccording to the same interview, reaching final orbit will take 20 days and satellite lifetime could be 5 years down from 15 yearsUnless the translation I have is poor, the satellite's lifespan has been reduced to 5 years, meaning it lost 10 years of its total lifespan.
Has Zhongxing 9A been de-orbited? The following orbit is derived from the latest element set issued for the catalogue number/international designator of the satellite:Jun 19.304 26.82 deg 306.20 min 251 - 17,090 km 185 deg (AoP)My guess is that all of the data for the 25.68 deg, ~192 - ~ 16,360 km orbits relate to the CZ-3B/E third stage. With no data for the satellite for ten days, the possibility that the satellite is no longer in orbit must be considered.
Quote from: Phillip Clark on 06/29/2017 12:25 pmHas Zhongxing 9A been de-orbited? The following orbit is derived from the latest element set issued for the catalogue number/international designator of the satellite:Jun 19.304 26.82 deg 306.20 min 251 - 17,090 km 185 deg (AoP)My guess is that all of the data for the 25.68 deg, ~192 - ~ 16,360 km orbits relate to the CZ-3B/E third stage. With no data for the satellite for ten days, the possibility that the satellite is no longer in orbit must be considered.No, it wasn't likely to have been de-orbited. For some time, JSpOC/18SPCS, lacking input from satellite owner/operators, has delayed the publication of an element set until the payload reaches its final orbit.
Quote from: BabaORileyUSA on 06/29/2017 02:11 pmQuote from: Phillip Clark on 06/29/2017 12:25 pmHas Zhongxing 9A been de-orbited? The following orbit is derived from the latest element set issued for the catalogue number/international designator of the satellite:Jun 19.304 26.82 deg 306.20 min 251 - 17,090 km 185 deg (AoP)My guess is that all of the data for the 25.68 deg, ~192 - ~ 16,360 km orbits relate to the CZ-3B/E third stage. With no data for the satellite for ten days, the possibility that the satellite is no longer in orbit must be considered.No, it wasn't likely to have been de-orbited. For some time, JSpOC/18SPCS, lacking input from satellite owner/operators, has delayed the publication of an element set until the payload reaches its final orbit.Routinely for Chinese missions we don't get the intermediate orbits catalogued between GTO and GEO, but a ten days gap is rather unusual.
Quote from: Phillip Clark on 06/29/2017 03:23 pmQuote from: BabaORileyUSA on 06/29/2017 02:11 pmQuote from: Phillip Clark on 06/29/2017 12:25 pmHas Zhongxing 9A been de-orbited? The following orbit is derived from the latest element set issued for the catalogue number/international designator of the satellite:Jun 19.304 26.82 deg 306.20 min 251 - 17,090 km 185 deg (AoP)My guess is that all of the data for the 25.68 deg, ~192 - ~ 16,360 km orbits relate to the CZ-3B/E third stage. With no data for the satellite for ten days, the possibility that the satellite is no longer in orbit must be considered.No, it wasn't likely to have been de-orbited. For some time, JSpOC/18SPCS, lacking input from satellite owner/operators, has delayed the publication of an element set until the payload reaches its final orbit.Routinely for Chinese missions we don't get the intermediate orbits catalogued between GTO and GEO, but a ten days gap is rather unusual.Usually, a bird takes less than that amount of time to reach GEO. This wounded duck, however, will probably require a bit more time to reach GEO from where it was dropped off....