ADS 48

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,[11] 12.53, 11.68,[2] 9.949,[5] and 13.00.[12]

ADS 48
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[9] mas
Distance36.9 ± 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[4] mas
Distance37.51 ± 0.02 ly
(11.500 ± 0.005 pc)
Orbit[10]
PrimaryA
CompanionB
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
Mass0.50[10] M☉
ADS 48 B
Mass0.53[10] M☉
ADS 48 F
Radius0.618±0.027[5] R☉
Temperature3484±50[5] K
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
SIMBADAB
A
B
F

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.[13] It has also been proposed the existence of an unseen companion of 0.05 M☉.[10]

References
  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. Houdebine, E. R. (2010). "Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars". Monthly Notices of the Royal Astronomical Society. 407 (3): 1657–1673. Bibcode:2010MNRAS.407.1657H. doi:10.1111/j.1365-2966.2010.16827.x.
  6. 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.
  7. Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  8. 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. arXiv:astro-ph/0112477. Bibcode:2002ApJS..141..503N. doi:10.1086/340570.
  9. 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. Vizier catalog entry
  10. 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.
  11. "GSC 03246-01561". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 July 2013.
  12. "GSC 03246-00320". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 July 2013.
  13. 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.
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