Kappa Serpentis, Latinised from κ Serpentis, is a single,[8] red-hued star in the constellation Serpens, in its head (Serpens Caput). It has the proper name Gudja /ˈɡuːdʒə/[9] and the Flamsteed designation 35 Serpentis.[7] This star is visible to the naked eye with an apparent visual magnitude of +4.09.[2] It is located approximately 383 light years from the Sun, based on parallax,[1] and is drifting closer with a radial velocity of −38 km/s.[4]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h 48m 44.37720s[1] |
| Declination | +18° 08′ 29.6337″[1] |
| Apparent magnitude (V) | 4.09[2] |
| Characteristics | |
| Spectral type | M0.5III[3] |
| U−B color index | +1.95[2] |
| B−V color index | +1.62[2] |
| Astrometry | |
| Radial velocity (Rv) | −38.48[4] km/s |
| Proper motion (μ) | RA: −52.407 mas/yr[1] Dec.: −88.419 mas/yr[1] |
| Parallax (π) | 8.5231 ± 0.1657 mas[1] |
| Distance | 383 ± 7 ly (117 ± 2 pc) |
| Absolute magnitude (MV) | −1.25[5] |
| Details | |
| Radius | 71.31+1.42 −1.48[6] R☉ |
| Luminosity | 1,021±57[6] L☉ |
| Temperature | 3,863±39[6] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
This object is an aging red giant star with a stellar classification of M0.5III.[3] After exhausting the supply of hydrogen at its core, the star cooled and expanded off the main sequence, and now has around 71 times the Sun's radius. It is radiating nearly 1,000 times the luminosity of the Sun from its photosphere at an effective temperature of 3,863 K.[6] This is a suspected variable star.[10]
Nomenclature
editκ Serpentis (Latinised to Kappa Serpentis) is the star's Bayer designation.
The star bore the traditional name Gudja in the culture of the Wardaman people of the Northern territory of Australia, meaning 'water goanna'.[11] In 2016, the IAU organized a Working Group on Star Names (WGSN)[12] to catalog and standardize proper names for stars. The WGSN approved the name Gudja for this star on 10 August 2018 and it is now so included in the List of IAU-approved Star Names.[9]
References
edit- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
- ^ a b Keenan, Philip C.; McNeil, Raymond C. (October 1989). "The Perkins Catalog of Revised MK Types for the Cooler Stars". Astrophysical Journal Supplement Series. 71: 245–266. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
- ^ a b Famaey, B.; et al. (18 February 2009). "Spectroscopic binaries among Hipparcos M giants – I. Data, orbits, and intrinsic variations". Astronomy and Astrophysics. 498 (2): 627–640. arXiv:0901.0934. Bibcode:2009A&A...498..627F. doi:10.1051/0004-6361/200810698.
- ^ Anderson, E.; Francis, Ch. (25 May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
- ^ a b c d Baines, Ellyn K.; Thomas Armstrong, J.; Clark, James H.; Gorney, Jim; Hutter, Donald J.; Jorgensen, Anders M.; Kyte, Casey; Mozurkewich, David; Nisley, Ishara; Sanborn, Jason; Schmitt, Henrique R.; Van Belle, Gerard T. (2021). "Angular Diameters and Fundamental Parameters of Forty-four Stars from the Navy Precision Optical Interferometer". The Astronomical Journal. 162 (5): 198. arXiv:2211.09030. Bibcode:2021AJ....162..198B. doi:10.3847/1538-3881/ac2431.
- ^ a b "kap Ser". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-14.
- ^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x.
- ^ a b "IAU Catalog of Star Names (IAU-CSN)" (TXT). International Astronomical Union. 17 September 2018. Archived from the original on 2018-10-04. Retrieved 2018-09-17.
- ^ Samus, N. N.; et al. (28 September 2017). "General Catalogue of Variable Stars". Astronomy Reports. GCVS 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
- ^ "IAU Working Group on Star Names (WGSN)" (Press release). International Astronomical Union. Archived from the original on 2020-10-04.
- ^ "Division C WG Star Names". International Astronomical Union. Archived from the original on 2018-09-29. Retrieved 17 September 2018.