ADS 48

ADS 48
Observation data
Epoch J2000      Equinox ICRS
Constellation Andromeda
ADS 48 A
Right ascension 00h 05m 41.0219s
Declination +45° 48′ 43.545″
Apparent magnitude (V) 8.826
ADS 48 B
Right ascension 00h 05m 41.0028s
Declination +45° 48′ 37.354″
Apparent magnitude (V) 8.995
Characteristics
ADS 48 A
Evolutionary stage main sequence
Spectral type K6V
B−V color index +1.344
ADS 48 B
Evolutionary stage main sequence
Spectral type M0.5V
B−V color index +1.345
Astrometry
Radial velocity (Rv)1.49±0.1 km/s
Proper motion (μ) RA: 887.48±1.02 mas/yr
Dec.: −152.02±1.04 mas/yr
Parallax (π)88.44±1.56 mas
Distance36.9 ± 0.7 ly
(11.3 ± 0.2 pc)
Absolute magnitude (MV)+7.93
Orbit
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
Mass0.50 M☉
Radius0.55 R☉
Luminosity0.077 L☉
Temperature4,104 K
ADS 48 B
Mass0.53 M☉
Radius0.52 R☉
Luminosity0.072 L☉
Temperature4,139 K
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
SIMBADAB
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. Component A is a K-type main-sequence star, while component B is an M-type main-sequence star (red dwarf). The stars are orbiting with a period of 550 years and a separation of 74 AU.

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. The existence of an unseen companion of 0.05 M☉ has also been proposed, but this was refuted.

References

  1. 1 2 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.
  2. 1 2 3 4 5 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.
  3. 1 2 3 4 5 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.
  4. 1 2 3 4 5 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. 1 2 3 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.
  6. 1 2 3 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. ↑ 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.
  8. 1 2 3 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 Archived 2019-04-02 at the Wayback Machine
  9. 1 2 3 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.
  10. 1 2 3 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.