Shapley-Sawyer Classification Standards
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My image collection
click each thumbnail for observation details |
Example |
Class |
Description |
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Classes I through III – The clusters contain a highly visible stellar concentration at the core, with a surrounding halo that decreases in luminosity as the distance from the core increases. |
![M75](images/Globs/100x-Messier-75-hc.jpg)
M75 |
I |
High concentration toward the center |
![](images/t.gif)
|
![M75](images/Globs/mine/M75_cal_100.jpg)
M 75 |
|
|
|
![M2](images/Globs/100px-Messier_2_Hubble_WikiSky.jpg)
M2 |
II |
Dense central concentration |
|
M 80 |
![NGC 6356](images/Globs/mine/NGC-6356_cal_100.jpg)
NGC 6356 |
![M2](images/Globs/mine/M2b_100.jpg)
M 2 |
|
![M54](images/Globs/100px-Messier_54_Hubble_WikiSky.jpg)
M54 |
III |
Strong inner core of stars |
|
![NGC362 - click for more](images/Globs/mine/NGC362.bw.100h.jpg)
NGC 362 |
![47 Tuc](images/Globs/mine/47-tuc-170813-stack-100.jpg)
47 Tuc |
![NGC 6388](images/Globs/mine/NGC6388b_cal_100.jpg)
NGC 6388 |
![NGC 6441](images/Globs/mine/NGC6441b_cal_100.jpg)
NGC 6441 |
|
III |
|
|
![NGC 6541](images/Globs/mine/NGC-6541_cal_100.jpg)
NGC 6541 |
![M 54](images/Globs/mine/M54_cal_100.jpg)
M 54 |
|
|
Classes IV
through VI – The core’s stellar concentration is still visible, but is more spread out and not as dense.
|
![M15](images/Globs/100px-Messier_15_HST.jpg) ![](images/t.gif)
M15 |
IV |
Intermediate rich concentrations |
|
![M62](images/Globs/mine/M62_cal_100.jpg)
M 62 |
![NGC 6293](images/Globs/mine/NGC-6293_cal_100.jpg)
NGC 6293 |
![M28](images/Globs/mine/M28_cal_100.jpg)
M 28 |
![M92](images/Globs/mine/M92_stack3_100.jpg)
M 92 |
|
IV |
|
|
![NGC6517](images/Globs/mine/NGC6517_3stack_100.jpg)
NGC 6517 |
![M 15](images/Globs/mine/m15_cal_100.jpg)
M 15 |
![NGC 6342](images/Globs/mine/NGC6342_100.jpg)
NGC 6342 |
|
![M30](images/Globs/100px-Messier_30_Hubble_WikiSky.jpg) ![](images/t.gif)
M30 |
V |
Intermediate concentrations |
![](images/t.gif)
|
![M 69](images/Globs/mine/M69_cal_100.jpg)
M 69 |
![M 30](images/Globs/mine/M30b_100.jpg)
M 30 |
![M70](images/Globs/mine/M70_cal_100.jpg)
M 70 |
![M13](images/Globs/mine/M13_stack3_100.jpg)
M 13 |
|
V |
|
|
![NGC 6544](images/Globs/mine/NGC6544_cal_100.jpg)
NGC 6544 |
|
|
|
![M3](images/Globs/100px-M3aHunterWilson.jpg) ![](images/t.gif)
M3 |
VI |
Intermediate |
![](images/t.gif)
|
![NGC 6522](images/Globs/mine/NGC6522_cal_100.jpg)
NGC 6522 |
![NGC 6624](images/Globs/mine/NGC-6624_cal_100.jpg)
NGC 6624 |
![NGC 6752](images/Globs/mine/NGC-6752_cal_100.jpg)
NGC 6752 |
|
Classes
VII through IX – Stellar concentration is more homogenous & less
contrasted
|
![M22](images/Globs/100px-M22HunterWilson.jpg) ![](images/t.gif)
M22 |
VII |
Intermediate |
![](images/t.gif)
|
![NGC 5986](images/Globs/mine/NGC5986_cal_100.jpg)
NGC 5986 |
![NGC 6723](images/Globs/mine/NGC-6723_cal_100.jpg)
NGC 6723 |
![M 22](images/Globs/mine/M22_cal_100.jpg)
M22 |
![M10](images/Globs/mine/m10_cal_100.jpg)
M 10 |
![M14](images/Globs/100px-M14HunterWilson.jpg) ![](images/t.gif)
M14 |
VIII |
Rather loosely concentrated towards the center |
|
![Omega Centauri](images/Globs/mine/omega-170813-stack-100.jpg)
Omega Cen |
![NGC 6584](images/Globs/mine/NGC6584_cal_100.jpg)
NGC 6584 |
![M 19](images/Globs/mine/m19_cal_100.jpg)
M 19 |
![M14](images/Globs/mine/M14_cal_100.jpg)
M 14 |
|
VIII |
|
|
![NGC 6717 (Palomar 9)](images/Globs/mine/NGC6717b_100.jpg)
Palomar 9 |
![M 9](images/Globs/mine/m9_cal_100.jpg)
M 9 |
![NGC 6401](images/Globs/mine/NGC6401_cal_100.jpg)
NGC 6401 |
![NGC 6934](images/Globs/mine/NGC6934_cal_100.jpg)
NGC 6934 |
![M12](images/Globs/100px-M12_Hubble.jpg)
M12 |
IX |
Loose towards the center |
|
![M4](images/Globs/mine/M4_cal_100.jpg)
M 4
|
![NGC 6397](images/Globs/mine/NGC6397b_cal_100.jpg)
NGC 6397 |
![M12](images/Globs/mine/m12_cal_100.jpg)
M 12 |
![M72](images/Globs/mine/M72_100.jpg)
M 72 |
|
IX |
|
|
![NGC6712](images/Globs/mine/NGC6712_100.jpg)
NGC 6712 |
|
|
|
Classes X through XII – The cluster surface luminosity is beocmng
totally homogeneous with no display of concentration at the
core. |
![M68](images/Globs/100px-Messier_68_Hubble_WikiSky.jpg) ![](images/t.gif)
M68 |
X |
Loose |
|
![NGC 6362](images/Globs/mine/NGC6362b_cal_100.jpg)
NGC 6362 |
![M 107](images/Globs/mine/M107_cal_100.jpg)
M 107 |
![Palomar 8](images/Globs/mine/Palomar8_3stack_100.jpg)
Palomar 8 |
![NGC6539](images/Globs/mine/NGC6539_100.jpg)
NGC 6539 |
|
X |
|
|
![NGC 288](images/Globs/mine/NGC288_cal_100.jpg)
NGC 288 |
![M 71](images/Globs/mine/m71_cal_100.jpg)
M 71 (X/XI) |
|
|
![M55](images/Globs/100px-M55.jpg) ![](images/t.gif)
M55 |
XI |
Very loose towards the center |
![](images/t.gif)
|
![NGC 6352](images/Globs/mine/NGC6352b_cal_100.jpg)
NGC 6352 |
![NGC 6496](images/Globs/mine/NGC6496b_cal_100.jpg)
NGC 6496 |
![NGC 6366](images/Globs/mine/NGC-6366_cal_100.jpg)
NGC 6366 |
![M55](images/Globs/mine/M55_cal_100.jpg)
M 55 |
|
XI |
|
|
![NGC 6535](images/Globs/mine/NGC6535_stack5_100.jpg)
NGC 6535 |
![M 71](images/Globs/mine/m71_cal_100.jpg)
M 71 (X/XI) |
![NGC 6553](images/Globs/mine/NGC6553_cal_100.jpg)
NGC 6553 |
|
![Palomar 12](images/Globs/100px-Palomar_12_Hubble.jpg) ![](images/t.gif)
Palomar 12 |
XII |
Almost no concentrations towards the center |
![](images/t.gif)
|
![Palomar 11](images/Globs/mine/Palomar-11-45651-stacked-PS-100.jpg)
Palomar 11 |
![Palomar 7](images/Globs/mine/Palomar7_GR_stack_100.jpg)
Palomar 7 |
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