Astronomy:59 Andromedae

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Short description: Binary star system in the constellation Andromeda
59 Andromedae
Observation data
{{#ifeq:J2000|J2000.0 (ICRS)|Epoch J2000.0      Equinox J2000.0 (ICRS)| Epoch J2000      [[Astronomy:Equinox (celestial coordinates)|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, PPM 67045[9]
59 And B: GC 2602, HD 13295, HIP 10180, HR 629, SAO 55331, PPM 67046[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 astronomical unit|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. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 Royer, F. et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics 463 (2): 671–682, doi:10.1051/0004-6361:20065224, Bibcode: 2007A&A...463..671R 
  4. ↑ 4.0 4.1 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, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D. 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 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, doi:10.1111/j.1365-2966.2008.14073.x, Bibcode: 2009MNRAS.392..448H. 
  6. ↑ 6.0 6.1 6.2 6.3 6.4 McDonald, I.; Zijlstra, A. A. et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–357, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M. 
  7. ↑ 7.0 7.1 7.2 7.3 Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, A120, Bibcode: 2012A&A...537A.120Z. 
  8. ↑ "59 And". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=59+And. 
  9. ↑ "59 And A". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=59+And+A. 
  10. ↑ "59 And B". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=59+And+B. 
  11. ↑ Mason, B. D. et al. (December 2001), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466–3471, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M 

External links



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