Observe
1Physical Properties
Magnitude
5.30
Spectral Type
G1IVb
supergiant
Star Color
Yellow
(B-V 0.63)
Distance
96 ly
2Position & Identifiers
RA
08h 07m 45.8s
Dec
+21° 34' 54.0"
Constellation
Cancer
(Cnc)
HR
3176
HIP
39780
HD
67228
SAO
79959
Bayer
Mu
Flamsteed
10 Cnc
Querying VizieR catalog...
3How easy to spot?
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and configure your equipment and default location to see a personalized row.
| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium | Hard+ | Hard |
| 50 mm finder 50mm finder | Easy | Easy | Easy |
| 150 mm telescope 150mm scope | Easy | Easy | Easy |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
Best season
Dec – Feb
(peak: Jan)
5Survey Image
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Explore
6
Size Comparison
Querying VizieR for stellar data…
7
Compare Stars
8
Spectral Classification
9
Hertzsprung-Russell Diagram
Loading HR diagram…
10
Stellar Lifecycle
11
Blackbody Spectrum
12
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
13
Stellar Fusion
Discover
14
Light Travel Time Machine
15
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.
NGC 2562
Bright spiral galaxy
Galaxy
mag 12.9
3.0°
Cancer
Tegmine
HIP 40167; Zeta1 Cancri; 16 Cancri
Tight double — a rewarding split at 1.1″
Double Star
mag 5.63
4.1°
Cancer
NGC 2420
Open cluster
Open Cluster
mag 8.3
6.8°
Gemini
Eskimo Nebula
NGC 2392
Small bright planetary nebula
Planetary Nebula
mag 9.2
9.0°
Gemini
Explore Nightbase
Related knowledge, tools, and stories — no observation planning required.
Arthur Eddington
1919 eclipse expedition confirming general relativity; first theory of stellar interiors; the Eddington limit
Biography
Cancer
Mythology, bright stars, and deep-sky highlights.
Constellation
The Hertzsprung-Russell Diagram — Reading Stars Like a Map
The HR diagram turns the night sky into a physics map: every named star has a spot, every spot tells you mass, age, and fate. A guide for amateur observers.
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