Page 1 of 2 12 LastLast
Results 1 to 10 of 15
Like Tree29Likes

Thread: Cold Night Comet

  1. #1
    Hillrat's Avatar
    Hillrat is offline SUPER GIANT
    Points: 7,536, Level: 60
    Level completed: 93%, Points required for next Level: 14
    Overall activity: 15.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!200+ Posts Achievement!
    Join Date
    Jul 2017
    Location
    Saskatchewan, Canada
    Posts
    1,255
    Points
    7,536
    Level
    60
    Thanks
    319
    Thanked 380x 267 Posts

    Default Cold Night Comet



    Comet C/2018 Y1 has been discussed here for a while. It seems it doesn't frequent us very often. The weather here hasn't been great for any night time viewing. Clouds, snow and record cold are February's mantra this year. Yesterday Clear Sky's forecast didn't look great either. However I've lived long enough to know when the forecast is incorrect (I have windows). I knew it was going to be cold, way colder than my self-imposed limit for my equipment..... but Iwamoto is a mover, and isn't going to wait for Momma Nature to make me feel warm.

    My real goal was to mess around and see if I could get "Plate solving" working in APT. No joy there, but the time wasn't wasted, the Comet was getting to be well above 30 degrees. There had been a few high thins roll through when I first started set up, those cleared as the temperature dropped. At 2155 Hrs I started imaging. The temp was -38C with the windchill (15-23 km/hr), but it was clear! I took 20 images at 8 seconds each, ISO 1600. The APT sequence finished at 2304 Hrs. Another night I learned something about APT. This is the first time I've managed to dither while employing APT.

    This is my fourth attempt at imaging a Comet, my technique is still a work in progress. This happens to be the first Comet attempt with a DSLR. The equipment used this evening was a SkyWatcher 8" Quattro with a Canon 1100D w Baader FF stuffed in it. The mount was a CGEM on a DIY pier.

    Comments welcome.

    C2018 Y1 DSS RS by Brent Secord, on Flickr

  2. The Following 7 Users Say Thank You to Hillrat For This Useful Post:

    GCoyote (02-13-2019),helicon64 (02-12-2019),ic_1101 (02-14-2019),Juno16 (02-12-2019),kanadalainen (02-12-2019),morrbru (02-12-2019),SpyderwerX (02-13-2019)

  3. #2
    Hillrat's Avatar
    Hillrat is offline SUPER GIANT
    Points: 7,536, Level: 60
    Level completed: 93%, Points required for next Level: 14
    Overall activity: 15.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!200+ Posts Achievement!
    Join Date
    Jul 2017
    Location
    Saskatchewan, Canada
    Posts
    1,255
    Points
    7,536
    Level
    60
    Thanks
    319
    Thanked 380x 267 Posts

    Default Re: Cold Night Comet

    Opps, time is wrong! Started imaging at 2155 Hrs, finished at 2204 Hrs.

  4. #3
    morrbru's Avatar
    morrbru is offline Silver Supporters
    Points: 7,334, Level: 59
    Level completed: 92%, Points required for next Level: 16
    Overall activity: 28.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!750 Days+ Registered Achievement!
    Join Date
    Jun 2014
    Location
    Casa Grande, Arizona
    Posts
    675
    Points
    7,334
    Level
    59
    Thanks
    161
    Thanked 227x 154 Posts

    Default Re: Cold Night Comet

    That's pretty much what I saw on the night of the 10th of February with the moon still up at around 10pm. I am a visual astronomer only at this time but I wish I had captured what you did if I was able to!!
    Bruce
    Meade 5" f/9 refractor, 10" f/4 Schmidt Newtonian, 2045D 4 " f/10 SCT, Adventure
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    80mm f/5 refractor, Meade & Jason 60mm f/12 refractors. Galileo 120mm f/8 reflector, Celestron 20x80, Tasco 10x50 binoculars.

  5. The Following User Says Thank You to morrbru For This Useful Post:

    Hillrat (02-12-2019)

  6. #4
    KT4HX's Avatar
    KT4HX is offline HYPER GIANT
    Points: 101,525, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 98.0%
    Achievements:
    365 Days+ Registered Achievement!First 1000 Experience Points750 Days+ Registered Achievement!1000 Days+ Registered Achievement!200+ Posts Achievement!
    Awards:
    3rd Most Active Award
    Join Date
    Dec 2008
    Location
    Virginia
    Posts
    11,784
    Points
    101,525
    Level
    100
    Thanks
    1,443
    Thanked 8,097x 4,360 Posts
    Blog Entries
    200

    Default Re: Cold Night Comet

    Looks like an irregular galaxy! Thanks for the visual.
    Alan || My DSO Blog:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    ---------------------------------------------------------------------------
    Astro Sky 17.5 f/4.5 Dob ||
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    f/5 Dob || Zhumell Z10 f/4.9 Dob
    ES AR127 f/6.5 and ES ED80 f/6 on Twilight-II Mount
    ES 82░ 24mm, 18mm; Pentax XW 10mm, 7mm, 5mm
    ---------------------------------------------------------------------------
    Astronomers: We look into the past to see our future.

  7. #5
    KathyNS's Avatar
    KathyNS is offline Super Moderator
    Points: 172,486, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 72.0%
    Achievements:
    200+ Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!First 1000 Experience Points400+ Posts AchievementGot three Friends
    Awards:
    Reply Award
    Join Date
    Nov 2010
    Location
    Nova Scotia
    Posts
    25,144
    Points
    172,486
    Level
    100
    Thanks
    6,658
    Thanked 14,976x 9,535 Posts
    Blog Entries
    3

    Default Re: Cold Night Comet

    Nice work! That guy was boogying! Do you have software that can stack on the comet rather than (or separately from) the stars? That way, you'd avoid the motion blur.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    DSO AP:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    (pier);
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    .

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  8. #6
    Juno16's Avatar
    Juno16 is offline SUPER GIANT
    Points: 12,439, Level: 77
    Level completed: 12%, Points required for next Level: 311
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!365 Days+ Registered Achievement!50 Posts Achievement!
    Join Date
    May 2016
    Location
    South Mississippi
    Posts
    1,471
    Points
    12,439
    Level
    77
    Thanks
    1,294
    Thanked 796x 576 Posts

    Default Re: Cold Night Comet

    Really cool image Brent!

    Glad that you have some clear skies to shoot through. I guess that is the tradeoff. Clear skies and frozen, or rain/clouds/fog and 63 degrees F. Right now I would probably take clear skies and frozen. At least for one night!

    Keep it up! Looking forward to more images!

    Thanks,
    Jim

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    : Explore Scientific ED102 Triplet APO,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    130 SLT.
    Mounts: Celestron AVX with
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    MM Autoguider, SLT; Binoculars: Bushnell 10X50;
    Camera: Nikon D3300 and D5300(unmodded),
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Tool, PHD2, SharpCap v3.2, StarTools, PE14
    Dog: Jack
    Astro Photos https://flickr.com/photos/157183480@N07/sets/72157707681236785

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  9. #7
    Mirrorgirl's Avatar
    Mirrorgirl is offline SUPER GIANT
    Points: 11,163, Level: 73
    Level completed: 5%, Points required for next Level: 287
    Overall activity: 36.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!
    Join Date
    Sep 2013
    Location
    Derby
    Posts
    842
    Points
    11,163
    Level
    73
    Thanks
    136
    Thanked 251x 241 Posts

    Default Re: Cold Night Comet

    Hi

    Thats a great capture

    Rhoda

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    4SE nexter Skywatcher Evostar 80mm apo pro..eqm 35pro mount
    Orion 80-A short tube refractor..orion 9mm and 20mm
    Celestron eye piece set...x2 Barlow 25mm plossl, moon filters
    Registax 5 and 6 stellarium..deep sky stacker..starry night...startools...gimp..autostackert... pipp...sharpcap...pixinsight
    T3i rebel camera and efs 18-55 mm lens. And 75-300mm lens..canon power shot a3200is, zwo asi 385mc iPad Pro laptop win 10

  10. #8
    helicon64's Avatar
    helicon64 is offline Indy the cat
    Points: 134,833, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 3.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!200+ Posts Achievement!
    Awards:
    Most Friends Award!
    Join Date
    Jul 2012
    Location
    Berkeley, CA
    Posts
    22,663
    Points
    134,833
    Level
    100
    Thanks
    23,733
    Thanked 6,969x 5,426 Posts

    Default Re: Cold Night Comet

    Very nice image - thanks for sharing it.
    Michael
    Obsession 18" f/4.2, Zhumell Z10 f/4.9, ES AR 152 refractor f/6.5, Celestron Skymaster 15x70's , Bushnell 10x50's
    9x50mm RACI finder, Telrad, Rigel Quickfinder, 30mm Erfle, 9mm Plossl, and full line of ES eyepieces
    Imagination is more important than knowledge. Knowledge is Limited. Imagination Circles the World... A. Einstein


  11. #9
    Hillrat's Avatar
    Hillrat is offline SUPER GIANT
    Points: 7,536, Level: 60
    Level completed: 93%, Points required for next Level: 14
    Overall activity: 15.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!200+ Posts Achievement!
    Join Date
    Jul 2017
    Location
    Saskatchewan, Canada
    Posts
    1,255
    Points
    7,536
    Level
    60
    Thanks
    319
    Thanked 380x 267 Posts

    Default Re: Cold Night Comet

    I was surprised at how quickly it was bookin' along. I probably have some software that will stack RAW files as Kathy suggested. I did look at a zoomed single image, wishing I had jacked up the ISO. It doesn't appear to be very big, and from reading, it isn't highly reflective. That said, the program I got the co-ordinates from said it was Magnitude +6.6 last night.

    The issue I have processing with the Comet stationary and the Stars trailing is it looks WEIRD!!! Way back when, in high school, we had a photography class. As I remember Rule 1, you always have a object that is your focal point. In my simple brain that equates to letting the central object (small fast comet) be blurry and the Stars be sharp (or as sharp as they can be with very short captures).

    I will re-process the data I have, just to see what come from it. That's the beauty of a hobby AP, if it sucks no one is paying for the time used to put it together. I have more on the theoretical "cutting room floor" than I have saved on a hard drive!
    Juno16 and GCoyote like this.

  12. The Following User Says Thank You to Hillrat For This Useful Post:

    Juno16 (02-13-2019)

  13. #10
    STEVE333's Avatar
    STEVE333 is offline Bronze Supporter
    Points: 112,201, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 5.0%
    Achievements:
    2 Posts Achievement5 Threads Achievement!20 Posts Achievement!50 Posts Achievement!First 1000 Experience Points
    Join Date
    Apr 2013
    Location
    Santa Cruz, CA (USA)
    Posts
    5,681
    Points
    112,201
    Level
    100
    Thanks
    2,369
    Thanked 2,757x 2,491 Posts

    Default Re: Cold Night Comet

    Just FYI - Pixinsight has a process for separating the stars from the comet, stacking each separately, and then recombining them to provide a final image with sharp stars, and, a bright un-smeared comet. Takes a bit of work, but, it works well.

    Other programs may have the same capability, I just don't know.

    Thanks for sharing with us.

    Steve
    Juno16 and Mag95On like this.
    Steve King:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    (
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    5) - SQM 19.08 mag./arc sec2 @
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    + Mount + Guiding:
    W.O. Star71-ii or ES ED102 CF +
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ZEQ25GT +
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Magnificent Mini AutoGuider
    Camera + Filter: Canon EOS Rebel T3 1100D (modified) + Triad Tri-Band or IDAS-LPS-D1 or Duo-Band Filter in Baader Protective T-Ring
    Software: PHD2; BYEOS; PixInsight; QPPA2_________My AP website
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    href="https://farm8.staticflickr.com/7895/47450127671_929ded9a38_b.jpg" rel="lightbox[signatures]">
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  14. The Following 2 Users Say Thank You to STEVE333 For This Useful Post:

    Juno16 (02-13-2019),Mag95On (02-13-2019)

 

 
Page 1 of 2 12 LastLast

Similar Threads

  1. Cold cold night !!!!!
    By hobbit1066 in forum Astronomy Reports Forum
    Replies: 15
    Last Post: 11-23-2015, 03:03 PM
  2. DSLR Deep Sky Imaging: Comet Lovejoy and M79 on a cold winter night
    By kbeverage in forum Astrophotography Forum
    Replies: 6
    Last Post: 12-31-2014, 02:22 PM
  3. Replies: 4
    Last Post: 11-30-2014, 12:58 AM
  4. C/2002 T7 Comet Images and Cold Weather Garb
    By Dennis Persyk in forum CCD Imaging Forum
    Replies: 0
    Last Post: 01-30-2004, 05:32 PM
  5. New Image of Comet Halley in the Cold
    By Ron Baalke in forum General Astronomy Forum
    Replies: 0
    Last Post: 09-02-2003, 03:32 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin« Version 4.2.0
Powered by vBulletin«
All times are GMT. The time now is 05:29 AM.