Tianwen-1 At Mars |
Tianwen-1 At Mars |
![]()
Post
#16
|
|
![]() Member ![]() ![]() ![]() Group: Members Posts: 219 Joined: 14-November 11 From: Washington, DC Member No.: 6237 ![]() |
For those who haven't already seen, there is excellent work independently tracking and predicting the trajectory of Tianwen-1 by radio amateurs (using that word only technically, since they are very much pros).
The latest is predicting orbital insertion at 8 seconds before 1200 UTC on Wednesday 10 February, with a 386 km periapsis - burn starts a few minutes before that if you, like me, are planning your peanut consumption carefully this week. Plenty of details to be found at these links (even a GMAT script and Jupyter notebook, and some doppler data, for the astrodynamically inclined). https://destevez.net/tag/tianwen/ Daniel Estévez recent twitter thread with MOI images Scott Tilley recent twitter thread |
|
|
![]() |
![]()
Post
#17
|
|
![]() Member ![]() ![]() ![]() Group: Members Posts: 185 Joined: 4-January 19 Member No.: 8523 ![]() |
We are entering the week distance window of the estimated landing date (17/may), from 10/may till 24/may.
As expected no info, but if they continue with the estimated dates, soon they will try the landing. https://www.uol.com.br/splash/noticias/afp/...-afp-7-dias.htm AFP international news for 7 days, land probably before May 15. "China's Tianwen-1 mission getting set to try and land Zhurong rover on Mars" https://www.abc.net.au/news/science/2021-05...nding/100101552 -------------------- "The Earth is a very small stage in a vast cosmic arena"
|
|
|
![]()
Post
#18
|
|
Member ![]() ![]() ![]() Group: Members Posts: 149 Joined: 18-June 08 Member No.: 4216 ![]() |
I don't think the entry module will be "detaching from an orbiter 70 kilometres above the surface", that's already in the atmosphere!
Instead it would be detaching from the orbiter somewhere along the orbit, the question is then how to change the entry module orbit to intersect the atmosphere. For Viking, the entry module carried its own propulsion system for this purpose. |
|
|
![]() ![]() |
![]() |
Lo-Fi Version | Time is now: 22nd June 2024 - 05:46 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |
![]() |