02h03m 26.10206s[1]
+72° 25′ 16.6376″[1]
+3.95[2]
Characteristics
A2 V[3]
B−V color index
−0.002±0.007[2]
Radial velocity (Rv)
−18.2±0.9[4] km/s
Proper motion (μ)
RA: −43.57[5] mas/yr
Dec.: +22.30[5] mas/yr
Parallax (π)
Absolute magnitude (MV)
0.54[2]
Details
Metallicity [Fe/H]
Rotational velocity (v sin i)
91[3] km/s
Database references
50 Cassiopeiae is a white star in the northern constellationofCassiopeia. In the past, it had been misidentified as a suspected nebula, and given the number NGC 771.[9] The star is visible to the naked eye, having an apparent visual magnitude of +3.95.[2] Based upon an annual parallax shiftof20.76 mas, it is located 157 light years away. It is moving closer, having a heliocentric radial velocity of −18 km/s,[4] and will approach to within 82 ly in 1.879 million years.[2]
It is an A-type main-sequence star with a stellar classification of A2 V.[3] It is a suspected variable star with a very small amplitude.[11] 50 Cas has an estimated 2.56 times the mass of the Sun,[3] and about 2.5 times the Sun's radius.[6] It is radiating 64 times the Sun's luminosity from its photosphere at an effective temperature of around 9,376 K.[3]
The star was the brightest star in the occasionally used 1775 to 19th century constellation Custos Messium, typically drawn as a depiction of Charles Messier standing on top of the giraffe (Camelopardus), between Cepheus and Cassiopeia.[12]
Other
Other
Other