59 Serpentis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Serpens |
| Right ascension | 18h 27m 12.50775s[1] |
| Declination | 00° 11′ 45.9912″[1] |
| Apparent magnitude (V) | 5.17-5.2[2] |
| Characteristics | |
| Spectral type | A0Vs + G:III[1] |
| U−B color index | +0.21[3] |
| B−V color index | +0.48[3] |
| Variable type | Irregular |
| Astrometry | |
| Radial velocity (Rv) | -23.3[4] km/s |
| Proper motion (μ) | RA: -3.67[5] mas/yr Dec.: -8.61[5] mas/yr |
| Parallax (π) | 6.95 ± 0.63 mas[5] |
| Distance | 470 ± 40 ly (140 ± 10 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
59 Serpentis, also known as d Serpentis, is a multiple star in the constellation Serpens.[1] It is a triple star system.[6] The primary system is a spectroscopic binary consisting of an A-type star and an orange giant,[7] while the secondary is another orange giant.[8] The system shows irregular variations in brightness between magnitudes 5.17 and 5.2.[2]
References
- ^ a b c d "d Serpentis -- Double or multiple star". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 2 July 2014.
- ^ a b VSX (4 January 2010). "d Serpentis". AAVSO Website. American Association of Variable Star Observers. Retrieved 25 May 2014.
- ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
- ^ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication. Bibcode:1953GCRV..C......0W.
- ^ a b c 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.
- ^ Tilley, E. C. (1943). "A Spectrographic Study of the Triple System in 59 D Serpentis". The Astrophysical Journal. 98: 347. Bibcode:1943ApJ....98..347T. doi:10.1086/144577.
- ^ Abt, H. A. (2009). "MK Classifications of Spectroscopic Binaries". The Astrophysical Journal Supplement Series. 180 (1): 117–118. Bibcode:2009ApJS..180..117A. doi:10.1088/0067-0049/180/1/117.
- ^ "HD 169986 – Star in double system". SIMBAD. Retrieved 25 May 2014.
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