Share this page!

Enter URL or ID to Unroll

You can paste full URL like: https://x.com/threadreaderapp/status/1644127596119195649
or just the ID like: 1644127596119195649

How to get URL link on X (Twitter) App

  1. On the Twitter thread, click on or icon on the bottom
  2. Click again on or Share Via icon
  3. Click on Copy Link to Tweet
  4. Paste it above and click "Unroll Thread"!
  5. More info at Twitter Help
Daniel Estévez Profile picture
Daniel Estévez
@ea4gpz
Amateur radio operator (EA4GPZ / M0HXM). PhD in Mathematics from @Matematicas_UAM. GNSS engineer by day, Independent Researcher by night. he/him
Feb 9, 2021 • 11 tweets • 4 min read
Today at 15:45 UTC @HopeMarsMission will be performing its Mars orbit insertion burn. Here are some technical details about this manoeuvre. Thread... The spacecraft would arrive to periapsis with a velocity of 5.1 km/s, a C3 of 7.23 km^2/s^2, and an altitude of 1162 km. The inclination of the hyperbolic orbit is 20 degrees. Some media state a target capture orbit of 1000 km x 49380 km (altitude).
Feb 8, 2021 • 4 tweets • 2 min read
Yesterday we tracked Tianwen-1 with one of the 6.1 metre dishes at Allen Telescope Array. Even at 188 million km distance the signal is strong enough to decode most of the frames. The spacecraft will arrive to Mars orbit on Wednesday at 12:00 UTC. The last orbit state vector we received in that observation is:

2021-02-07 23:23:03.744100 18791639.655712113 211029173.8782428 96492674.05965108 -21.108400067542537 4.768376820024702 1.8445381918644286