AO Cassiopeiae
From Infogalactic: the planetary knowledge core
Observation data Epoch J2000 Equinox J2000 |
|
---|---|
Constellation | Cassiopeia |
Right ascension | 00h 17m 43.062s[1] |
Declination | +51° 25′ 59.12″[1] |
Apparent magnitude (V) | 6.102 |
Characteristics | |
Spectral type | O9III + O9III |
Variable type | β Lyr |
Astrometry | |
Radial velocity (Rv) | −35.2 km/s |
Proper motion (μ) | RA: −3.98 ± 0.35[1] mas/yr Dec.: −1.76 ± 0.29[1] mas/yr |
Parallax (π) | 1.36 ± 0.44[1] mas |
Distance | approx. 2,400 ly (approx. 700 pc) |
Details | |
AO Cas A | |
Mass | 20.30-57.75[2] M☉ |
Radius | 11.5 / 7.5 R☉ |
AO Cas B | |
Mass | 14.8-31.73[2] M☉ |
Other designations | |
Database references | |
SIMBAD | data |
AO Cassiopeiae, also known as Pearce's Star, is a binary system, composed of two massive hot blue stars of spectral types O7/O9III and O8/O9III that each weigh anywhere between 20.30 and 57.75 times and 14.8 and 31.73 times the mass of our Sun respectively.[2] The system is an eclipsing binary with a period of roughly 3.5 days, with the apparent magnitude ranging between 6.07 and 6.24.[3] Stars of this brightness are generally just visible to the unaided eye in dark skies in semirural locations.[4]
The component stars are so close to each other they are ellipsoidal (egg-shaped).[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Lua error in package.lua at line 80: module 'strict' not found.Vizier catalog entry
- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ [1]
External links
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