Kappa2 Sculptoris
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Sculptor[1] |
| Right ascension | 00h 11m 34.42072s[2] |
| Declination | −27° 47′ 58.9908″[2] |
| Apparent magnitude (V) | +5.42[3] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | K2 III[4] |
| B−V color index | +1.35[3] |
| Astrometry | |
| Radial velocity (Rv) | −5.6±0.8[5] km/s |
| Proper motion (μ) | RA: +5.058[2] mas/yr Dec.: +12.900[2] mas/yr |
| Parallax (π) | 5.7132±0.0814 mas[2] |
| Distance | 571 ± 8 ly (175 ± 2 pc) |
| Absolute magnitude (MV) | −1.46[1] |
| Details | |
| Mass | 4.2[2] M☉ |
| Radius | 31[6] R☉ |
| Luminosity | 325[6] L☉ |
| Surface gravity (log g) | 1.34[7] cgs |
| Temperature | 4,393[6] K |
| Metallicity [Fe/H] | −0.40[7] dex |
| Rotational velocity (v sin i) | 2.2[8] km/s |
| Age | 1.63[9] Gyr |
| Other designations | |
| κ2 Scl, CD−28°26, FK5 5, HD 720, HIP 930, HR 34, SAO 166103, WDS J00116-2748A[10] | |
| Database references | |
| SIMBAD | data |
Kappa2 Sculptoris, Latinized from κ2 Sculptoris, is a solitary,[11] orange-hued star in the southern constellation of Sculptor. It is faintly visible to the naked eye, with a combined apparent visual magnitude of +5.42.[3] Based upon an annual parallax shift of 5.7 mas as measured from Earth,[2] it is located approximately 571 light years from the Sun.
This is an evolved K-type giant star with a stellar classification of K2 III.[4] It is radiating 325 times the solar luminosity from its photosphere at an effective temperature of 4,393.[6] There is a faint optical companion with visual magnitude 21.0 located at an angular separation of 44.2 arc seconds along a position angle of 289°, as of 2010.[12]
References
[edit]- ^ a b 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. XHIP record for this object at VizieR.
- ^ a b c d e f g h 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 Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa, 27: 11, Bibcode:1968MNSSA..27...11C.
- ^ a b Houk, Nancy (1979), "Michigan catalogue of two-dimensional spectral types for the HD stars", Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume_3. Declinations -40.0° to -26.0°, 3, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1982mcts.book.....H.
- ^ 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 Fetherolf, Tara; Pepper, Joshua; Simpson, Emilie; Kane, Stephen R.; Močnik, Teo; English, John Edward; Antoci, Victoria; Huber, Daniel; Jenkins, Jon M.; Stassun, Keivan; Twicken, Joseph D.; Vanderspek, Roland; Winn, Joshua N. (2023). "Variability Catalog of Stars Observed during the TESS Prime Mission". The Astrophysical Journal Supplement Series. 268 (1): 4. arXiv:2208.11721. Bibcode:2023ApJS..268....4F. doi:10.3847/1538-4365/acdee5.
- ^ a b Matsuno, Tadafumi; Starkenburg, Else; Balbinot, Eduardo; Helmi, Amina (2024). "Improving metallicity estimates for very metal-poor stars in the Gaia DR3 GSP-Spec catalog". Astronomy and Astrophysics. 685: A59. arXiv:2212.11639. Bibcode:2024A&A...685A..59M. doi:10.1051/0004-6361/202245762.
- ^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars. V. Southern stars". Astronomy and Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762.
- ^ Huang, Yang; Beers, Timothy C.; Wolf, Christian; Lee, Young Sun; Onken, Christopher A.; Yuan, Haibo; Shank, Derek; Zhang, Huawei; Wang, Chun; Shi, Jianrong; Fan, Zhou (2022). "Beyond Spectroscopy. I. Metallicities, Distances, and Age Estimates for over 20 Million Stars from SMSS DR2 and Gaia EDR3". The Astrophysical Journal. 925 (2): 164. arXiv:2104.14154. Bibcode:2022ApJ...925..164H. doi:10.3847/1538-4357/ac21cb.
- ^ "kap02 Scl". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-01.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 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, S2CID 14878976.
- ^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22
