Star profile
10 Canis Majoris
Variable starWhat is 10 Canis Majoris
10 Canis Majoris shines in the realm of Sirius, the Greater Dog, and reveals the blue-white colour of hot, energetic B-type stars. It is also faintly variable: its brightness is not quite constant, but oscillates with the pulse of its atmosphere. Far from the white roar of Sirius, it offers a blue counterpoint, discreet, in a region of the sky dominated by one of the brightest beacons of the firmament.
Where it is and when to see it
10 Canis Majoris lies in the southern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is January, when it culminates around midnight.
- From London it culminates about 7° above the horizon.
- From New York it culminates about 18° above the horizon.
- From Sydney it culminates about 87° above the horizon.
It can be seen from anywhere south of 59° N.
It ranks no. 35 in brightness among the 90 stars of Canis Major in our catalogue. To find it, start from Sirius, the brightest: it lies about 14° away (a fist at arm's length covers about 10°).
The light you see today left it about 330,000 years ago.
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Astronomical data for 10 Canis Majoris
- Constellation
- Canis Major
- Apparent magnitude
- 5.23
- Distance
- 326200.0 light years
- Coordinates (J2000)
- RA 101.119° · Dec -31.071°
- Catalogue
- HIP 32292 · HD 48917
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Other stars in Canis Major
Canis Major has 90 stars in Stelvia's catalogue. Here are a few of them.
- SiriusAlpha Canis Majoris-1.44
- AdharaEpsilon Canis Majoris1.50
- WezenDelta Canis Majoris1.83
- HIP 310845.16
- HIP 359515.18
- HIP 304575.21
- HIP 316885.25
- 11 Canis Majoris5.28