Jump to content


HiRes Ceres

  • Please log in to reply
1 reply to this topic

#1 Mike Phillips

Mike Phillips


  • *****
  • Posts: 3519
  • Joined: 21 Feb 2006
  • Loc: Swift Creek, NC - 35.682 N, 78.743°W

Posted 28 March 2009 - 07:58 PM

I was inspired by Fabio Plocostomos and Chris Go's work on Ceres at high res and decided to go for it myself near opposition or good seeing. So that single 2 day break in rain and clouds a week ago yielded some good Venus and Saturn images and also this great view of Ceres.

I had a hard time finding some good ephemeris data for angular size so calculated it myself as follows:


[Theta doesn't show in BBCODE, I substituted &]

& = d / D, where & is the angular size, d is visual diameter and D is the distance to the object.

So using the WRONG units I get:

1.64AU distance to Ceres and 950km diameter of Ceres gives 0.798".

I hope to not have overexposed the object which would have caused bloat or bloom in the data. I stretched in post processing and resized to 200%



Attached Files

#2 chris go

chris go


  • *****
  • Posts: 1292
  • Joined: 06 Apr 2004
  • Loc: Cebu City, Philippines

Posted 29 March 2009 - 06:41 AM

Nice work Mike. Imaging Ceres is really tough!


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics