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Star in the constellation Andromeda From Wikipedia, the free encyclopedia
CC Andromedae (CC And) is a variable star in the constellation Andromeda. It is a pulsating star of the Delta Scuti type, with an apparent visual magnitude that varies between 9.19 and 9.46 with a periodicity of 3 hours.[3]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
Right ascension | 00h 43m 48.01231s[2] |
Declination | +42° 16′ 55.76902″[2] |
Apparent magnitude (V) | 9.19 – 9.46 variable [3] |
Characteristics | |
Spectral type | F3IV-V[3] |
Apparent magnitude (R) | 9.40[4] |
Apparent magnitude (B) | 9.693[5] |
Apparent magnitude (V) | 9.347[5] |
Apparent magnitude (G) | 9.3034[2] |
Apparent magnitude (J) | 8.586[6] |
Apparent magnitude (H) | 8.526[6] |
Apparent magnitude (K) | 8.49[6] |
U−B color index | 0.11[7] |
B−V color index | 0.3162[5] |
Variable type | δ Sct[3] |
Astrometry | |
Radial velocity (Rv) | −9.5±1.2[8] km/s |
Proper motion (μ) | RA: -8.198[2] mas/yr Dec.: -3.920[2] mas/yr |
Parallax (π) | 2.6339 ± 0.0175 mas[2] |
Distance | 1,238 ± 8 ly (380 ± 3 pc) |
Absolute bolometric magnitude (Mbol) | 1.25[7] |
Details[7] | |
Mass | 1.98 M☉ |
Radius | 3.04 R☉ |
Surface gravity (log g) | 3.77±0.1 cgs |
Temperature | 7,400 K |
Rotational velocity (v sin i) | 20 km/s |
Other designations | |
Database references | |
SIMBAD | data |
The variability of CC Andromedae was discovered accidentally, by Olin Eggen on October 22, 1952, when he attempted to use it as a comparison star for measuring the brightness and colors of stars in the Andromeda Galaxy which is about one degree away from CC Andromedae.[9]
The stellar classification of CC Andromedae is F3IV-V, as it shows intermediate characteristics between a subgiant and a main sequence star. The brightness variations are the result of 7 different pulsation modes, most of which are non-radial,[7] making it a suspected Gamma Doradus variable too.[10]
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