| Observation data EpochJ2000 EquinoxJ2000 | |
|---|---|
| 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−Vcolor index | +1.344[2] |
| ADS 48 B | |
| Spectral type | M0.5V[6] |
| B−Vcolor index | +1.345[2] |
| ADS 48 F | |
| Spectral type | M1V[5] |
| U−Bcolor index | +1.18[7] |
| B−Vcolor 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 ± 96.99yr |
| 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° |
| Periastronepoch (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 | |
| HD 38,HIP 473,GJ 4,CCDM J00057+4548AB,WDS J00057+4549AB | |
| 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 theconstellation ofAndromeda consisting of 7 stars. The components, in order from A to G, haveapparent 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 acommon 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 0.05M☉.[10]
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