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]
| 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 mas[1] |
| Distance | 456 ± 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 mas[1] |
| Distance | 440 ± 4 ly (135 ± 1 pc) |
| Details | |
| 59 And A | |
| Radius | 2.73[5] R☉ |
| Luminosity | 83.97[6] L☉ |
| Temperature | 10,870[6] K |
| Rotational velocity (v sin i) | 176[3] km/s |
| 59 And B | |
| Mass | 2.23±0.09[7] M☉ |
| Radius | 2.59[5] R☉ |
| Luminosity | 30.4+7.6 −6.1[7] L☉ |
| Temperature | 9,498[6] K |
| Rotational velocity (v sin i) | 233[3] km/s |
| Other designations | |
| 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 | |
| SIMBAD | data |
| SIMBAD | data |
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
edit- ^ a b c d e f g h i j 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.
- ^ a b c d e f 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, S2CID 119257644.
- ^ a b c d e f g h 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, S2CID 18475298
- ^ a b 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, S2CID 59451347, A61.
- ^ a b c d e 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.
- ^ a b c d e 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, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
- ^ a b c d Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789, A120.
- ^ "59 And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 3, 2018.
- ^ "59 And A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 3, 2018.
- ^ "59 And B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 3, 2018.
- ^ 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