NGC 2173 — Globular Cluster in Mensa
Modest (15/100)
Observe
1Properties
Magnitude
11.88
Angular Size
2.6′
pF, pL, R, gmbM
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Position & Identifiers
2How easy to spot?
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | Hard | V. hard+ | V. hard |
| 150 mm Newton 150mm Newt. | Medium | Hard+ | Hard |
| Celestron C8 (203 mm SCT) C8 203mm | Medium+ | Medium | Hard+ |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
Medium
on Seestar S50
3Visibility
Set a location in User Settings to see visibility data.
Best season
Nov – Jan
(peak: Dec)
4
Eyepiece View
125x
TFOV: 0.4°
Lim. mag: 13.6
NGC 2173 · 2.6′ diameter · N up, E left
5
Best Magnification
Explore
6
Classification Decoder
Nearby in the Sky
Other targets within a few degrees — pan your scope a little and keep exploring.
Visibility scores assume a 150 mm Newton at Bortle 4.
NGC 2121
Compact globular cluster
Globular Cluster
mag 11.2
1.7°
Mensa
NGC 2133
Compact globular cluster
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mag 12.04
1.9°
Mensa
NGC 2134
Open cluster
Open Cluster
mag 11.0
1.9°
Mensa
NGC 2018
Emission nebula — try an OIII filter
Emission Nebula
mag 10.89
2.8°
Mensa
NGC 1987
Compact globular cluster
Globular Cluster
mag 12.0
3.3°
Mensa
NGC 2019
Compact globular cluster
Globular Cluster
mag 11.0
3.5°
Mensa
NGC 2069
Diffuse nebula
Diffuse Nebula
mag 10.10
4.3°
Dorado
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