59 Andromedae

59 Andromedae
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
59 And A
Right ascension 02h 10m 52.82451s[1]
Declination +39° 02′ 22.3597″[1]
Apparent magnitude (V) 6.09[2]
59 And B
Right ascension 02h 10m 53.65687s[1]
Declination +39° 02′ 35.9164″[1]
Apparent magnitude (V) 6.82[2]
Characteristics
59 And A
Spectral type B9 V[3]
B−V color index −0.054±0.006[2]
59 And B
Spectral type A1 Vn[3]
B−V color index +0.081±0.005[2]
Astrometry
59 And A
Radial velocity (Rv)−1.00±3.4[4] km/s
Proper motion (μ) RA: −13.506[1] mas/yr
Dec.: −14.981[1] mas/yr
Parallax (π)7.1469 ± 0.1007[1] mas
Distance456 ± 6 ly
(140 ± 2 pc)
59 And B
Radial velocity (Rv)6.0±4.6[4] km/s
Proper motion (μ) RA: −9.166[1] mas/yr
Dec.: −17.208[1] mas/yr
Parallax (π)7.4166 ± 0.0619[1] mas
Distance440 ± 4 ly
(135 ± 1 pc)
Details
59 And A
Radius2.73[5] R☉
Luminosity83.97[6] L☉
Temperature10,870[6] K
Rotational velocity (v sin i)176[3] km/s
59 And B
Mass2.23±0.09[7] M☉
Radius2.59[5] R☉
Luminosity30.4+7.6
−6.1[7] L☉
Temperature9,498[6] K
Rotational velocity (v sin i)233[3] km/s
Other designations
59 And, BD+38° 425, ADS 1683, WDS J02109+3902[8]
59 And A: GC 2600, HD 13294, HIP 10176, HR 628, SAO 55330[9]
59 And B: GC 2602, HD 13295, HIP 10180, HR 629, SAO 55331[10]
Database references
SIMBADdata
SIMBADdata

59 Andromedae, abbreviated 59 And, is a sixth-magnitude binary star system in the northern constellation of Andromeda. 59 Andromedae is the Flamsteed designation. As of 2017, the pair had an angular separation of 16.60″ along a position angle (PA) of 36°. Compare this to a separation of 15.3″ along a PA of 35°, as measured in 1783.[11] The two stars have an estimated physical separation of 1,370 AU.[5]

The magnitude 6.09[2] primary component is a B-type main-sequence star with a stellar classification of B9 V.[3] It has 2.73[5] times the Sun's radius and is radiating 84 times the Sun's luminosity from its photosphere at an effective temperature of 10,870 K.[6] It is spinning with a projected rotational velocity of 176 km/s.[3]

The secondary is a magnitude 6.82[2] A-type main-sequence star with a class of A1 Vn,[3] where the 'n' suffix indicates "nebulous" lines due to rapid rotation. It is spinning with a high projected rotational velocity of 233 km/s.[3] The star has 2.23[7] times the Sun's mass and 2.59[5] times the Sun's radius. It is radiating 30[7] times the luminosity of the Sun and has an effective temperature of 9,498 K.[6]

References

  1. 1 2 3 4 5 6 7 8 9 10 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.
  2. 1 2 3 4 5 6 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.
  3. 1 2 3 4 5 6 7 8 Royer, F.; et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224
  4. 1 2 de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, A61.
  5. 1 2 3 4 5 Howe, K. S.; Clarke, C. J. (January 2009), "An analysis of v sin (i) correlations in early-type binaries", Monthly Notices of the Royal Astronomical Society, 392 (1): 448–454, Bibcode:2009MNRAS.392..448H, doi:10.1111/j.1365-2966.2008.14073.x.
  6. 1 2 3 4 5 McDonald, I.; Zijlstra, A. A.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society, 427: 343, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
  7. 1 2 3 4 Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, A120.
  8. ↑ "59 And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 3, 2018.
  9. ↑ "59 And A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 3, 2018.
  10. ↑ "59 And B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 3, 2018.
  11. ↑ Mason, B. D.; et al. (December 2001), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466–3471, Bibcode:2001AJ....122.3466M, doi:10.1086/323920
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