Star profile
42 Cassiopeiae
Hot blue starWhat is 42 Cassiopeiae
42 Cassiopeiae is a hot blue B-type star within the famous W of Cassiopeia, that angular sweep which presides over northern skies and never sets at mid-European latitudes. At around 278 light-years, its light set out in the years when the great royal observatories of Paris and Greenwich were rising, just as modern astronomy was beginning to measure stellar distances with growing confidence.
Where it is and when to see it
42 Cassiopeiae lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is November, when it culminates around midnight.
- From London it never sets and culminates about 71° up.
- From New York it never sets and culminates about 60° up.
- From Sydney it never rises above the horizon.
It can be seen from anywhere north of 19° S.
It ranks no. 36 in brightness among the 93 stars of Cassiopeia in our catalogue. To find it, start from Cih, the brightest: it lies about 11° away (a fist at arm's length covers about 10°).
The light you see today left it about 280 years ago.
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Astronomical data for 42 Cassiopeiae
- Constellation
- Cassiopeia
- Apparent magnitude
- 5.18
- Distance
- 277.6 light years
- Coordinates (J2000)
- RA 25.732° · Dec 70.623°
- Catalogue
- HIP 8016 · HD 10250
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Other stars in Cassiopeia
Cassiopeia has 93 stars in Stelvia's catalogue. Here are a few of them.
- CihGamma Cassiopeiae2.15
- SchedarAlpha Cassiopeiae2.24
- CaphBeta Cassiopeiae2.28
- HIP 1135615.10
- HIP 122735.17
- Mu Cassiopeiae5.17
- 49 Cassiopeiae5.22
- 47 Cassiopeiae5.27