Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Observability V. Periodicity

  • Please log in to reply
1 reply to this topic

#1 Alex McConahay

Alex McConahay

    Fly Me to the Moon

  • *****
  • topic starter
  • Posts: 7427
  • Joined: 11 Aug 2008
  • Loc: Moreno Valley, CA

Posted 09 December 2018 - 02:18 PM

Okay, solar system folks...….

 

I have a question inspired by 46PWirtanen. I had never recalled seeing it before, even hearing of it. I have been observing for some time. I would have known. 

 

It is quite visible in my 15 inch Dob, and even the finder scope for it. Got a pretty good pic of it in the imaging camera, although I have not yet processed to confirm. So, it is obviously observable...….

 

In looking it up, I notice it has a periodicity of 5.6 years. Ok, so if it is so bright, and comes around every five or six roughly years, how come it has not come to my attention before? Or------to put it in other terms------Does a comet have approximately the same observability each time it comes around, or does it vary a bunch?

 

ALex

 


  • Augustus likes this

#2 Richard O'Neill

Richard O'Neill

    Surveyor 1

  • *****
  • Posts: 1921
  • Joined: 19 Aug 2014

Posted 09 December 2018 - 02:30 PM

Proximity with Earth varies.


  • Jaimo!, Augustus and Vedran like this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics