Collinder 140 — Open Cluster in Canis Major
Excellent (64/100)
Observe
1Properties
Magnitude
3.5
Angular Size
60 arcmin
Open Cluster
Position & Identifiers
2How easy to spot?
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | Easy | Easy | Easy |
| 150 mm Newton 150mm Newt. | Easy | Easy | Easy |
| Celestron C8 (203 mm SCT) C8 203mm | Easy | Easy | Easy |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
Easy
on Seestar S50
3Visibility
Set a location in User Settings to see visibility data.
Best season
Dec – Feb
(peak: Jan)
4
Eyepiece View
5
Best Magnification
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.
Collinder 132
Open cluster
Open Cluster
mag 3.6
2.3°
Canis Major
Aludra
HIP 35904; Eta Canis Majoris; 31 Canis Majoris
Colorful double, sep 177.0″
Double Star
mag 2.45
2.5°
Canis Major
NGC 2439
Rich open cluster
Open Cluster
mag 6.9
3.5°
Puppis
Pi Puppis Cluster
Open cluster
Open Cluster
mag 2.1
5.2°
Puppis
NGC 2325
Elliptical galaxy
Galaxy
mag 11.2
5.7°
Canis Major
NGC 2354
Rich open cluster
Open Cluster
mag 6.5
6.6°
Canis Major
29 CMa
Eclipsing binary, period 4.4d
Variable Star
mag 4.98
7.4°
Canis Major
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