Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
ADS 48 A | |
Right ascension | 00h 05m 41.0219s[1] |
Declination | +45° 48′ 43.5452″[1] |
Apparent magnitude (V) | 8.826[2] |
ADS 48 B | |
Right ascension | 00h 05m 41.0028s[3] |
Declination | +45° 48′ 37.3535″[3] |
Apparent magnitude (V) | 8.995[2] |
ADS 48 F | |
Right ascension | 00h 05m 10.8892s[4] |
Declination | +45° 47′ 11.6395″[4] |
Apparent magnitude (V) | 9.949[5] |
Characteristics | |
ADS 48 A | |
Spectral type | K6V[6] |
B−V color index | +1.344[2] |
ADS 48 B | |
Spectral type | M0.5V[6] |
B−V color index | +1.345[2] |
ADS 48 F | |
Spectral type | M1V[5] |
U−B color index | +1.18[7] |
B−V color index | +1.50[7] |
Astrometry | |
ADS 48 AB | |
Radial velocity (Rv) | 1.49±0.1[8] km/s |
Proper motion (μ) | RA: 887.48±1.02[9] mas/yr Dec.: −152.02±1.04[9] mas/yr |
Parallax (π) | 88.44 ± 1.56 mas[9] |
Distance | 36.9 ± 0.7 ly (11.3 ± 0.2 pc) |
ADS 48 F | |
Radial velocity (Rv) | −0.39±0.09[8] km/s |
Proper motion (μ) | RA: 870.753±0.057[4] mas/yr Dec.: −151.267±0.036[4] mas/yr |
Parallax (π) | 86.9567 ± 0.0407 mas[4] |
Distance | 37.51 ± 0.02 ly (11.500 ± 0.005 pc) |
Orbit[10] | |
Primary | A |
Companion | B |
Period (P) | 509.65 ± 96.99 yr |
Semi-major axis (a) | 6.21 ± 0.77″ |
Eccentricity (e) | 0.22 ± 0.04 |
Inclination (i) | 54.9 ± 2.4° |
Longitude of the node (Ω) | 13.5 ± 2.3° |
Periastron epoch (T) | 2115.80 ± 123.47 |
Argument of periastron (ω) (secondary) | 267.2 ± 27.4° |
Details | |
ADS 48 A | |
Mass | 0.50[10] M☉ |
ADS 48 B | |
Mass | 0.53[10] M☉ |
ADS 48 F | |
Radius | 0.618±0.027[5] R☉ |
Temperature | 3484±50[5] K |
Rotation | 15.37(9)[11] days |
Rotational velocity (v sin i) | 2.76[5] km/s |
Other designations | |
ADS 48 A: HD 38A, SAO 36046, GC 71, GJ 4 A, CCDM J00057+4548A, WDS J00057+4549A | |
ADS 48 B: HD 38B, SAO 36048, GC 72, GJ 4 B, CCDM J00057+4548B, WDS J00057+4549B | |
ADS 48 F: HIP 428, GJ 2, CCDM J00057+4548F, WDS J00057+4549F | |
Database references | |
SIMBAD | AB |
A | |
B | |
F |
ADS 48 is a multiple star system in the constellation of Andromeda consisting of 7 stars. The components, in order from A to G, have apparent visual magnitudes of 8.826, 8.995,[2] 13.30,[12] 12.53, 11.68,[2] 9.949,[5] and 13.00.[13]
ADS 48A and ADS 48B are in orbital motion around each other while ADS 48F is a common proper motion companion not gravitationally bound to the pair. The others are unassociated background stars, and component C could be a double star itself.[14] It has also been proposed the existence of an unseen companion of 0.05 M☉.[10]