Observe
1Properties
Magnitude
7.1
Angular Size
7 arcmin
Distance
10,200 ly
Open Cluster
Position & Identifiers
Physical size
21 light-years across
— about 2.4× the Sun-to-Sirius distance
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
Discover
6
Light Travel Time Machine
7
Relativistic Travel
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.
Melotte 72
Open cluster
Open Cluster
mag 10.1
1.4°
Puppis
NGC 2423
Rich open cluster
Open Cluster
mag 6.7
1.8°
Puppis
NGC 2396
Open cluster
Open Cluster
mag 7.0
2.3°
Puppis
M47
NGC 2422
Rich open cluster
Open Cluster
mag 4.4
2.4°
Puppis
NGC 2438
Planetary nebula — try an OIII filter
Planetary Nebula
mag 10.0
2.9°
Puppis
R CMa
Eclipsing binary, period 1.1d
Variable Star
mag 5.70
6.1°
Canis Major
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