Although slightly off topic as the observations where by radio, CE4 was acquired by radio using Bill's search TLEs. https://twitter.com/coastal8049/status/1071523463255384064 Later a maneuver was witnessed. https://twitter.com/coastal8049/status/1071543722762952704 Here's the radio observation corrected TLE for today, MA, RAAN and MM adjusted: 1 89988U 18342.74919926 .00000000 00000-0 00000-0 0 00 2 89988 29.4496 350.0302 9771803 141.8181 24.9221 0.08563329 06 # 20181208.89-20181208.91, 266 measurements, 0.005 kHz rms Nice work Bill! Regards, Scott Tilley ROBERTS CREEK 1: 8049 ST 49.4348 -123.6685 40. Scott Tilley ROBERTS CREEK 2: 8048 ST 49.4175 -123.6420 1. Scott Tilley Keep tabs on COSPAR 8049 on Twitter: https://twitter.com/coastal8049?lang=en On 12/8/18 9:35 AM, Bill Gray via Seesat-l wrote: > > > On 08/12/2018 09.45, tme_at_asteroidinitiatives.com [mpml] wrote: >> On their Weibo account, China Aerospace Science and Technology >> Corporation (CASC) confirmed that #ChangE4 has successfully separated >> from the upper stage and is now in lunar injection orbit, with perigee >> at 200 km and apogee at ~420,000 km. >> https://www.weibo.com/5386897742/H6cRnxOac?from=page_1006065386897742_profile&wvr=6&mod=weibotime >> >> … >> >> https://twitter.com/Yeqzids/status/1071244045614075904 > > And also stated that it'll enter orbit around the moon at > 15:00 UTC on December 11. That really constrains the possible > orbit, and shows that my solution was far off, by about 15 > degrees. We're now looking at an elongation from the sun of > about 45 degrees, so I don't really expect optical confirmation. > (At least, not until after the booster passes the moon and is > seen sometime later. This will be similar to the orbits I got, > in hindsight, for Chang'es 2 and 3 on their way to the moon : > I used the astrometry from well after the lunar flyby to figure > out the earth/moon leg.) > > I've updated the TLEs (same URL as before). The new orbit > hits the moon at 15:00 UTC on the 11th, because I don't know > what the actual planned orbit is. Assuming it does a close > flyby, my trajectory will be a little more than a quarter > degree in error at that point, making it a near-miss. > > -- Bill > _______________________________________________ > Seesat-l mailing list > http://mailman.satobs.org/mailman/listinfo/seesat-l _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Sat Dec 08 2018 - 17:35:12 UTC
This archive was generated by hypermail 2.3.0 : Sat Dec 08 2018 - 23:35:12 UTC