Celestial hemisphere:  Northern  ·  Constellation: Andromeda (And)
Getting plate-solving status, please wait...
G1 (Mayall II), 



    
        

            Gary Imm
G1 (Mayall II), 



    
        

            Gary Imm

G1 (Mayall II)

Getting plate-solving status, please wait...
G1 (Mayall II), 



    
        

            Gary Imm
G1 (Mayall II), 



    
        

            Gary Imm

G1 (Mayall II)

Acquisition details

Dates:
Jan. 5, 2022 ·  Jan. 6, 2022
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 2×2
Astrodon Gen2 I-Series Tru-Balance Lum: 60×120(2h) (gain: 120.00) -10°C bin 2×2
Astrodon Gen2 I-Series Tru-Balance Red: 30×120(1h) (gain: 120.00) -10°C bin 2×2
Integration:
5h
Avg. Moon age:
3.62 days
Avg. Moon phase:
14.34%

RA center: 00h32m46s.597

DEC center: +39°3439.54

Pixel scale: 0.343 arcsec/pixel

Orientation: -0.457 degrees

Field radius: 0.231 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 4045x2684

File size: 3.6 MB

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

Data source: Backyard

Description

This extragalactic globular cluster, also known as Mayall II, is located 2.5 million light years away in the constellation of Andromeda at a declination of +40 degrees.  It is a magnitude 13.8 cluster which spans 25 arc-seconds in our apparent view.  This corresponds to a diameter of 300 light years.

G1 is the brightest of 500+ globular clusters that have been identified so far as belonging to the Andromeda Galaxy (M31), which is located off image about 2.5 degrees to the northeast (upper left).   G1 is located about 120,000 light years from the galactic center of M31.  In Revision F, I have attached an image with the top 10 brightest clusters (after G1) identified in the near vicinity of M31.  

Discovered by American astronomers Mayall and Eggen in 1953 using the Palomar 48 inch telescope,  G1 is believed to have twice the mass of Omega Centauri.

Comments

Revisions

  • G1 (Mayall II), 



    
        

            Gary Imm
    Original
  • G1 (Mayall II), 



    
        

            Gary Imm
    E
  • G1 (Mayall II), 



    
        

            Gary Imm
    F

E

Description: Mouseover

Uploaded: ...

F

Description: The top 10 brightest clusters (after G1) identified in the near vicinity of M31.

Uploaded: ...

Sky plot

Sky plot

Histogram

G1 (Mayall II), 



    
        

            Gary Imm