36 Andromedae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| 36 Andromedae A | |
| Right ascension | 00h 54m 58.25579s |
| Declination | +23° 37′ 41.3002″ |
| Apparent magnitude (V) | 6.12, 5.45 (A + B) |
| 36 Andromedae B | |
| Right ascension | 00h 54m 58.21490s |
| Declination | +23° 37′ 42.2805″ |
| Apparent magnitude (V) | 6.54 |
| Characteristics | |
| Spectral type | G8 IV + K3 IV |
| B−V color index | 1.012±0.010 |
| Astrometry | |
| Radial velocity (Rv) | −0.84±0.12 km/s |
| Proper motion (μ) | RA: 135.43±1.00 mas/yr Dec.: −48.61±0.48 mas/yr |
| Parallax (π) | 26.33±0.65 mas |
| Distance | 124 ± 3 ly (38.0 ± 0.9 pc) |
| Absolute magnitude (MV) | 2.56 |
| Orbit | |
| Primary | 36 And A |
| Name | 36 And B |
| Period (P) | 169.08±0.37 yr |
| Semi-major axis (a) | 0.9847″±0.0017″ (37 AU) |
| Eccentricity (e) | 0.3092±0.0014 |
| Inclination (i) | 44.80±0.18° |
| Longitude of the node (Ω) | 173.60±0.32° |
| Periastron epoch (T) | 1956.23±0.17 |
| Argument of periastron (ω) (secondary) | 359.0±0.6° |
| Details | |
| 36 And A | |
| Mass | 1.45 M☉ |
| Radius | 3.71 R☉ |
| Luminosity | 7.75 L☉ |
| Temperature | 5,000 K |
| 36 And B | |
| Mass | 1.34 M☉ |
| Other designations | |
| 36 And, NSV 343, BD+22°146, HD 5286, HIP 4288, HR 258, SAO 74359, PPM 90284, ADS 755, WDS J00550+2338AB | |
| Database references | |
| SIMBAD | system |
| 36 Andromedae A | |
| 36 Andromedae B | |
36 Andromedae is a binary star system in the northern constellation of Andromeda, which is part of a triple star system. The designation is from the star catalogue of English astronomer John Flamsteed, first published in 1712. It is faintly visible to the naked eye with an apparent visual magnitude of 5.45. An annual parallax shift of 26.33 mas yields a distance estimate of about 124 light years. The system is moving closer to the Sun with a radial velocity of −0.8 km/s.