Astronomical League's page for the Globular Cluster Program Page showing globs that defined the class where you can click on image to get full size pic of object Messier globs by classification Astronomical League YouTube video on the Globular Cluster Program
Globular Cluster Concentration Class Descriptions
| Class | Description |
|---|---|
| I | High concentration of stars towards the center (M80) |
| II | Dense central concentration of core stars (M2) |
| III | Strong inner concentration of core stars (M54) |
| IV | Intermediately rich concentration of core stars (M15) |
| V | Intermediate concentration of core stars (M13) |
| VI | Intermediately mild concentration of core stars (M3) |
| VII | Intermediately loose concentration of core stars (M22) |
| VIII | Rather loose concentration of core stars (M14) |
| IX | Loose concentration of core stars (M12) |
| X | Very loose concentration of core stars (M68) |
| XI | Almost no concentration of core stars (M55) |
| XII | No concentration of core stars (Palomar 12) |
Objects in order they were observed
Hopefully observation quality and concentrtion estimates improve over time
AL#49 NGC1904 M79 In my backyard my eyes never really become dark adapted due to porch lights and passing traffic. At 85x the cluster appears to be a very small pea-like fuzzy ball. It has a dense core with a haziness extending a little less than twice as wide as the core. I can see how Messier could easily mistake this for a comet. At 145x it is a little bigger but still pretty small. WIth direct visionj I can not resolve any stars. With averted vision I do see a few stars in the haze surrounding the core. At 203x it is larger but very dim. With averted vision I could resolve some stars in the haze surround the core. I could not resolve any stars across the face of the core. The shape is round and did not detect any ovalness. Did not see any lanes. The core was dense and I did not see any looseness iin it at all. I estimate the concentration of this to be a IV or V.
This was provided to me by a Facebook friend after a discussion of documenting requirements for the program.
This page last updated on 2/5/2024 10:11:31 AM. If you have comments or suggestions, email me at webmaster@jscheetz.com