| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 17m 05.4983s |
| Declination | +38° 40′ 53.888″ |
| Apparent magnitude (V) | 4.619 |
| Characteristics | |
| Spectral type | A2V |
| U−B color index | 0.04 |
| B−V color index | 0.06 |
| Variable type | variable Star |
| Astrometry | |
| Radial velocity (Rv) | 0.9 km/s |
| Proper motion (μ) | RA: 50.01 mas/yr Dec.: -17.90 mas/yr |
| Parallax (π) | 12.88 ± 1.31 mas |
| Distance | approx. 250 ly (approx. 78 pc) |
| Absolute magnitude (MV) | 4.679 |
| Orbit | |
| Companion | θ Andromedae B |
| Semimajor axis (a) | 0.1" |
| Inclination (i) | 144° |
| Other designations | |
| Database references | |
| SIMBAD | data |
Theta Andromedae (θ And, θ Andromedae) is a binary star in the constellation Andromeda. It is approximately 253 light years from Earth.
The primary component, Theta Andromedae A, is a white A-type main sequence dwarf with an apparent magnitude of +4.61. The companion, Theta Andromedae B is separated from the primary by 0.1 arcseconds.
|
||||||||||||||