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ADS 48
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda[1] |
| ADS 48 A | |
| Right ascension | 00h 05m 41.0219s[2] |
| Declination | +45° 48′ 43.545″[2] |
| Apparent magnitude (V) | 8.826[3] |
| ADS 48 B | |
| Right ascension | 00h 05m 41.0028s[4] |
| Declination | +45° 48′ 37.354″[4] |
| Apparent magnitude (V) | 8.995[3] |
| Characteristics | |
| ADS 48 A | |
| Spectral type | K6V[5] |
| B−V color index | +1.344[3] |
| ADS 48 B | |
| Spectral type | M0.5V[5] |
| B−V color index | +1.345[3] |
| Astrometry | |
| Radial velocity (Rv) | 1.49±0.1[6] km/s |
| Proper motion (μ) | RA: 887.48±1.02[7] mas/yr Dec.: −152.02±1.04[7] mas/yr |
| Parallax (π) | 88.44±1.56 mas[7] |
| Distance | 36.9 ± 0.7 ly (11.3 ± 0.2 pc) |
| Absolute magnitude (MV) | +7.93[1] |
| Orbit[8] | |
| Period (P) | 557±120 yr |
| Semi-major axis (a) | 74±10 AU |
| Eccentricity (e) | 0.19±0.08 |
| Inclination (i) | 54.3±2.3° |
| Longitude of the node (Ω) | 12.5±2.8° |
| Periastron epoch (T) | 2110±30 |
| Argument of periastron (ω) (secondary) | 256±31° |
| Details | |
| ADS 48 A | |
| Mass | 0.50[9] M☉ |
| ADS 48 B | |
| Mass | 0.53[9] M☉ |
| 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 | |
| Database references | |
| SIMBAD | AB |
| A | |
| B | |
ADS 48 is a binary system in the constellation of Andromeda.
The components have apparent visual magnitudes of 8.826 and 8.995.[3] Component A is a K-type main-sequence star, while component B is an M-type main-sequence star (red dwarf).[5] The stars are orbiting with a period of 550 years and a separation of 74 AU.[8]
Multiple stars lie close to ADS 48 in the line of sight, and have been considered components C, D and E of the system, but are background objects. ADS 48 F (Gliese 2) is at a similar distance from the pair and share similar proper motions, but is moving faster than the escape velocity of the pair and thus is not gravitationally bound.[10] The existence of an unseen companion of 0.05 M☉ has also been proposed,[9] but this was refuted.[8]
References
[edit]- ^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
- ^ a b Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d e Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy & Astrophysics. 355: L27 – L30. Bibcode:2000A&A...355L..27H.
- ^ a b Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c Tamazian, Vakhtang S.; Docobo, José A.; Melikian, Norair D.; Karapetian, Arthur A. (2006). "MK Classification and Dynamical Masses for Late-Type Visual Binaries". Publications of the Astronomical Society of the Pacific. 118 (844): 814. Bibcode:2006PASP..118..814T. doi:10.1086/504881.
- ^ Nidever, David L.; Marcy, Geoffrey W.; Butler, R. Paul; Fischer, Debra A.; Vogt, Steven S. (2002). "Radial Velocities for 889 Late-Type Stars". The Astrophysical Journal Supplement Series. 141 (2): 503–522. arXiv:astro-ph/0112477. Bibcode:2002ApJS..141..503N. doi:10.1086/340570. S2CID 51814894.
- ^ a b c van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600. Vizier catalog entry
- ^ a b c Kiyaeva, O. V.; Zhuchkov, R. Ya; Izmailov, I. S. (2021). "Investigation of relative motion in the triple system ADS 48 on the basis of Gaia DR2 and Pulkovo 26-inch refractor observations". Astronomical and Astrophysical Transactions. 32 (2): 89–98. Bibcode:2021A&AT...32...89K. ISSN 1055-6796.
- ^ a b c Kiyaeva, O. V. (2001). "An astrometric study of the triple star ADS 48". Astronomy Letters. 21 (6): 391–397. Bibcode:2001AstL...27..391K. doi:10.1134/1.1374678. S2CID 121012446.
- ^ Cvetković, Z.; et al. (2012). "System ADS 48: Visual Binary or Multiple System". The Astronomical Journal. 144 (3) 80. Bibcode:2012AJ....144...80C. doi:10.1088/0004-6256/144/3/80. S2CID 120045704.
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