[neo_followup] Mars Perseverance astrometry

[Jost Jahn]

I could image it too, bright and easy

     Mars20   C2020 07 30.93825200 17 47.46 +20 49 03.2          15.2 G      C95
     Mars20   C2020 07 30.93982600 17 49.72 +20 49 55.4          15.1 G      C95
     Mars20   C2020 07 30.94138900 17 51.93 +20 50 45.1          15.1 G      C95
     Mars20   C2020 07 30.94295100 17 54.08 +20 51 35.8          15.0 G      C95
     Mars20   C2020 07 30.94450200 17 56.14 +20 52 24.9          15.3 G      C95
     Mars20   C2020 07 30.94604200 17 58.28 +20 53 14.9          15.1 G      C95
     Mars20   C2020 07 30.94761600 18 00.30 +20 54 04.2          15.1 G      C95
     Mars20   C2020 07 30.94916700 18 02.29 +20 54 52.8          15.2 G      C95
     Mars20   C2020 07 30.95074100 18 04.22 +20 55 40.9          15.0 G      C95
     Mars20   C2020 07 30.95230300 18 06.07 +20 56 28.7          15.1 G      C95
Jost


On 30.07.2020 16:30, Bill Gray wrote:
> Hi folks,
> 
>    My third and last request for data on a Mars mission...
> 
>    We have nominal ephemerides for the spacecraft from JPL's
> Horizons system :
> 
> https://ssd.jpl.nasa.gov/?horizons_news
> 
>    Observability should resemble that for Tianwen-1 and EMM;
> the objects will be in the same general area of the sky,
> reasonably easy to observe for Northern Hemispherians.  As
> with those two earlier missions,  we'll have to figure out
> where the boosters are (and any other bits that fall off)
> ourselves.
> 
>    As far as I know,  no Mars mission hardware has come back
> and been observed.  But except for the bits that stay at Mars,
> the rest is usually in an orbit where it could come back and
> be observed,  and we probably couldn't tell that it wasn't
> a rock;  the speed would resemble that of a natural object.
> For example,  if Tianwen-1 should fail for any reason,  it'll
> be quite visible from the Southern Hemisphere in July 2023.
> So your data matters.
> 
> -- Bill
>