Tianwen-1 At Mars |
Tianwen-1 At Mars |
Feb 8 2021, 03:04 PM
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#1
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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 |
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Mar 4 2021, 02:43 AM
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#2
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Senior Member Group: Members Posts: 2087 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Is the low sun angle why the polar cap isn't bright white like we see in other images (both Hubble and other orbiters?) Or are others "enhanced" and this one is not?
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Mar 4 2021, 05:59 AM
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#3
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Senior Member Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 |
Is the low sun angle why the polar cap isn't bright white like we see in other images (both Hubble and other orbiters?) Pretty typical for this season. See https://apod.nasa.gov/apod/ap980924.html for example. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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