The Full Wiki

More info on Mu Cassiopeiae

Mu Cassiopeiae: Wikis


Note: Many of our articles have direct quotes from sources you can cite, within the Wikipedia article! This article doesn't yet, but we're working on it! See more info or our list of citable articles.


From Wikipedia, the free encyclopedia

Mu Cassiopeiae A/B
Observation data
Epoch J2000      Equinox J2000
Constellation Cassiopeia
Right ascension 01h08m16.4s
Declination +54°55′13″
Apparent magnitude (V) 5.17/11
Spectral type G5VIp/M5V
U-B color index 0.10
B-V color index 0.69
Variable type Suspected
Radial velocity (Rv) -98.1 km/s
Proper motion (μ) RA: 3,421.44 mas/yr
Dec.: -1,599.27 mas/yr
Parallax (π) 132.57 ± 0.57 mas
Distance 24.6 ± 0.1 ly
(7.54 ± 0.03 pc)
Absolute magnitude (MV) 5.78/11.6
Companion μ Cas B
Period (P) 21.40 yr
Semimajor axis (a) 0.189"
Eccentricity (e) 0.62
Inclination (i) 110.0°
Longitude of the node (Ω) 227.3°
Periastron epoch (T) 1975.80
Mass 0.60/0.17 M
Radius 0.74/0.29 R
Luminosity 0.46/0.001 L
Temperature 5290 K
Metallicity 13-28%
Rotation ?
Age 7.9 × 109 years
Other designations
30 Cassiopeiae, Gl 53, HR 321, BD+54°223, HD 6582, LHS 8, LTT 10460, GCTP 219.00, SAO 22024, FK5 1030, LFT 107, HIP 5336, GC 1360, CCDM J01080+5455
Star map of the Bayers Stars in Cassiopeia. Mu Cassiopeiae is circled.

Mu Cassiopeiae (μ Cas / μ Cassiopeiae) is a binary star system in the constellation Cassiopeia. This system shares the name Marfak with Theta Cassiopeiae.

In 1961 the close binary nature of this system was discovered. Since then the orbital elements of the two stars have been fairly well established. The two stars are separated by a distance range of 0.54–2.30 AU. Compared to other nearby stars, this pair are moving at a relatively high velocity of 167 km/s through the Milky Way galaxy. They are low metal, Population II stars that are thought to have formed before the galactic disk first appeared.


External links



Got something to say? Make a comment.
Your name
Your email address