Palomar 12 ( Gary Imm )

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Palomar 12

Imaging Telescopes Or Lenses: Celestron EdgeHD 11"
Imaging Cameras: ZWO ASI294MM Pro
Mounts: Astro-Physics Mach1 GTO
Filters: Astrodon Gen2 I-Series Tru-Balance Blue · Astrodon Gen2 I-Series Tru-Balance Green · Astrodon Gen2 I-Series Tru-Balance Red
Accessories: Celestron Off-Axis Guider · MoonLite Revised CHL 2.5 inch Large Format Crayford EDGE Focuser · ZWO EFW 7 x 2″
Software: Adobe Lightroom · Adobe Photoshop · Main Sequence Software Sequence Generator Pro (SGP) · Open PHD Guiding Project PHD2 · Pleiades Astrophoto PixInsight
Guiding Cameras: ZWO ASI174MM Mini

Dates:: Oct. 4, 2021
Frames:: Astrodon Gen2 I-Series Tru-Balance Blue: 30×120″(1h) (gain: 120.00) -10°C bin 2×2
Astrodon Gen2 I-Series Tru-Balance Green: 30×120″(1h) (gain: 120.00) -10°C bin 1×1
Astrodon Gen2 I-Series Tru-Balance Red: 30×120″(1h) (gain: 120.00) -10°C bin 2×2
Integration:: 3h
Avg. Moon age:: 27.39 days
Avg. Moon phase:: 5.11%

RA center: 21h46m37s.820

DEC center: -21°14′58″.44

Pixel scale: 0.344 arcsec/pixel

Orientation: -0.430 degrees

Field radius: 0.234 degrees

WCS transformation: thin plate spline

More info:Open

Resolution: 4034x2772

File size: 3.3 MB

Locations: Backyard (Mag 20.8 - Bortle 4.5), Onalaska, Texas, United States

Data source: Backyard

This object is an extragalactic globular cluster located 60,000 light years away in the constellation of Capricornus at a declination of -21 degrees. This magnitude 12 cluster spans 2 arc-minutes in our apparent view, which corresponds to a diameter of 40 light years. The 3 bright stars seen in my image are not part of the cluster.

Palomar 12 is one of 15 faint globular clusters identified in the 1950s when found on POSS (Palomar Observatory Sky Survey) plates. Upon discovery, this object was believed to be a nearby dwarf galaxy. That conclusion was almost right. Palomar 12 is not a nearby dwarf galaxy, but is from a nearby dwarf galaxy.

Most Milky Way globular clusters lie along the galactic plane. This one lies far off of the plane. A study of its motions concluded that this cluster did not originate in the Milky Way. It was torn away from the Sagittarius Dwarf Spheroidal Galaxy about 2 billion years ago.

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Description: Comparison to Hubble Image

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CMOS Imagers
Cloudy Nights
Globular Star Clusters

STARS - Globular Clusters
STARS - Globular Clusters (SDSG)

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Deep sky
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Backyard
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Status	Advanced success
Started	...
Astrometry.net job	5083875
PixInsight job	TM2N23VRCVSVDLPXZFTNHR2JFNX05MW6
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h46m37s.820
RA (top/left)	21h47m27s.175
RA (top/right)	21h45m48s.750
RA (bottom/right)	21h45m48s.496
RA (bottom/left)	21h47m27s.752

Dec (center)	-21°14′58″.44
Dec (top/left)	-21°06′56″.22
Dec (top/right)	-21°07′05″.80
Dec (bottom/right)	-21°23′03″.92
Dec (bottom/left)	-21°22′49″.30

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Palomar 12

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