Comet CatalinaComet Catalina


C/2013 US10 Catalina
Mag 5 ish at brightest
Discovered by the Catalina Sky Survey on 31/10/13



15/01/16
No notes made on the night, just a sketch of this Mag 6 ish fuzzy ball, no sign of any tail
Here is the sketch made at the eyepiece just after midnight
with opposite the occular view within Stellarium for the same time, using the Solar System Plug-in for Stellarium to download object lists from the Minor Planet Center's website
 
28/01/16
Frustrating start as the clouds kept closing in and not quite sure where to look, sky cleared but no luck, came in and loaded comet data into Stellarium only to go back out and find sky clouded over!
Persevered and at about 7:50pm there it was
Very close to a star of Mag 9.10 which actually appeared to be within it!
A bright, tight ball with quite a large diffuse halo and a hint of a tail
In the same 12mm FOV as HIP 52464 at Mag 6.7 and HIP 51883 at Mag 6.45
In for dinner, came back out to find a clear sky and Comet Catalina now midway between the Mag 9.10 star and HIP 52464
Fantastic to see obvious movement in the two hours or so of observing

30/01/16
It has moved northwards since I last observed it two days ago and, I think, got fainter although there does appear to be a hint of a tail below it
Quite easy to locate , but not visible in the finderscope, close to HIP 41793 which at Mag 4.25 is the brightest of a bucket shaped asterism of stars getting dimmer from top right clockwise, with HIP 51502 at Mag 5.25, HIP 51384 at Mag 5.50 and HIP 45421 at Mag 6.25
HIP 47193 is just in the same 25mm FOV as Catalina and just out of it in 12mm
I was interested to see how Catalina compared in brightness to M81, Bodes Nebula, which has a magnitude of 6.90,
M81 was defiantly brighter, not by much but noticeable, otherwise they were surprisingly similar in size and shape

02/02/16
Still climbing, now well past Polaris and heading into a rather sparse area of the sky
 Telescope axis offset from north to enable easier observations but still a bit of a stretch as the telescope turns!
The FOV does not move very much compared to observing objects away from the pole
Used M81 as a comparison of magnitude yet again, M81 is defiantly brighter, although not by much, in 12mm both appear similar in appearance

10/02/16
Faint when located using 12mm, now in Camelopardalis
Best view however using 18mm where it is framed by stars of 8th and 9th magnitude
Catalina itself much dimmer than when last observed, like a Mag 8 Galaxy but in 18mm what appears with inverted vision to be quite a long tail