Observe
1Physical Properties
Magnitude
4.12
Spectral Type
B8II
bright giant
Star Color
Blue-white
(B-V -0.12)
2Position & Identifiers
RA
07h 03m 45.5s
Dec
-15° 37' 60.0"
Constellation
Canis Major
(CMa)
HR
2657
HIP
34045
HD
53244
SAO
152303
Bayer
Gamma
Flamsteed
23 CMa
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Medium+ | Medium+ | Medium |
| 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
7
Size Comparison
Querying VizieR for stellar data…
8
Compare Stars
9
Spectral Classification
10
Hertzsprung-Russell Diagram
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11
Stellar Lifecycle
12
Blackbody Spectrum
13
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
14
Stellar Fusion
Discover
15Stellar Notes
Member of Pleiades group; Collinder 121 #30.
Muliphen; Muliphein; Isis; Mirza.
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.
Explore Nightbase
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1919 eclipse expedition confirming general relativity; first theory of stellar interiors; the Eddington limit
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From birth in a nebula to spectacular death — how stars are born, shine, swell, and die, and how to read the clues in their starlight.
Article
Canis Major
Mythology, bright stars, and deep-sky highlights.
Constellation
