Hi Alessandro,
Since the residuals are consistent with one another, and in line
with the uncertainty position angle, it suggests that your image
start and end times for plate xe559 might be wrong. --Rob
-----Original Message-----
From:
find_orb@yahoogroups.com on behalf of Alessandro
Sent: Sat 2/2/2013 12:12 AM
To:
find_orb@yahoogroups.com
Subject: [find_orb] asteroid (70401) davidbishop - check residuals
I think I found a 1950 DSS precovery image of this asteroid.
When I used Find_Orb to check the residuals of these observations, I got a reasonable result: they were well below 0".5, and the overall mean residual was 0".784
So I sent the measurements to MPC and apparently all was fine, the observations appear in the MPC database.
However, yesterday I realized that the 1950 observations are not used in the orbit calculation because their residuals are incredibly high.
MPC calculates:
19500422 675(29.6- 10.2+)
19500422 675(29.6- 10.3+)
I can not understand this.
Did I make a big error when using Find_Orb?
Thanks!
Best wishes,
Alessandro Odasso
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