Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  Solar system body or event
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Just Missing Conjunction with Globular Cluster M3, Closeup of Comet Leonard, 



    
        

            Dan Bartlett
Just Missing Conjunction with Globular Cluster M3, Closeup of Comet Leonard
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Just Missing Conjunction with Globular Cluster M3, Closeup of Comet Leonard

Getting plate-solving status, please wait...
Just Missing Conjunction with Globular Cluster M3, Closeup of Comet Leonard, 



    
        

            Dan Bartlett
Just Missing Conjunction with Globular Cluster M3, Closeup of Comet Leonard
Powered byPixInsight

Just Missing Conjunction with Globular Cluster M3, Closeup of Comet Leonard

Equipment

Imaging Telescopes Or Lenses
Celestron RASA 11"
Imaging Cameras
ZWO ASI294MC Pro
Mounts
10Micron GM2000 HPS II
Software
Main Sequence Software Sequence Generator Pro · Pleiades Astrophoto PixInsight

Acquisition details

Dates:
Dec. 3, 2021
Frames:
139x60" (2h 19')
Integration:
2h 19'
Avg. Moon age:
28.57 days
Avg. Moon phase:
1.04%

Basic astrometry details

Astrometry.net job: 5289665

RA center: 13h44m25s.9

DEC center: +28°1821

Pixel scale: 1.543 arcsec/pixel

Orientation: 353.574 degrees

Field radius: 1.012 degrees

Resolution: 3843x2745

Locations: 7700ft June Lake Ca USA, June Lake, Ca, United States

Data source: Backyard

Description

So California missed the transit by a handful of hours.  In addition we were experiencing an unusual flow of thick westward moving high clouds from a stagnate bubble of air.  Very stable skies, however the forecast didn't look good for the imaging session.  Although I had to eliminate over 100 x 60 second exposures from the bunch, due to extreme star halos, I managed to use 139 x 60 seconds for this image.

Processed solely in PixInsight which separates the comet from the stars, to be stacked & processed separately and then be recombined here is some more info...

Observational Information:
scope:C-RASA11
Camera: ASI294mcP
139 x 60 seconds
June Lake, California USA
Dan Bartlett

WCS transformation ....... Linear
Projection ............... Gnomonic
Projection origin ........ [1921.495000 1372.501391] px -> [RA: 13 44 25.898  Dec: +28 18 23.08]
Resolution ............... 1.544 arcsec/px
Rotation ................. 6.682 deg
Reference system ......... ICRS
Observation start time ... 2021-12-03 13:41:20 UTC
Focal distance ........... 618.69 mm
Pixel size ............... 4.63 um
Field of view ............ 1d 38' 52.1" x 1d 10' 37.2"
Image center ............. RA: 13 44 25.898  Dec: +28 18 23.08
Image bounds:
   top-left .............. RA: 13 48 28.712  Dec: +28 47 28.41
   top-right ............. RA: 13 41 00.159  Dec: +28 59 02.43
   bottom-left ........... RA: 13 47 49.022  Dec: +27 37 24.71
   bottom-right .......... RA: 13 40 25.303  Dec: +27 48 51.15

Comments

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Just Missing Conjunction with Globular Cluster M3, Closeup of Comet Leonard, 



    
        

            Dan Bartlett