| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 18 45 55.99514 |
| Declination | −50° 52′ 21.7342″ |
| Apparent magnitude (V) | 6.24±0.01 |
| Characteristics | |
| Spectral type | B8/9 II |
| B−V color index | −0.080±0.006 |
| Astrometry | |
| Radial velocity (Rv) | −10.7±0.4 km/s |
| Proper motion (μ) | RA: +3.697 mas/yr Dec.: −15.975 mas/yr |
| Parallax (π) | 3.1031 ± 0.0499 mas |
| Distance | 1,050 ± 20 ly (322 ± 5 pc) |
| Absolute magnitude (MV) | −1.52 |
| Details | |
| Mass | 4.00±0.11 M☉ |
| Radius | 5.54 −0.14 R☉ |
| Luminosity (bolometric) | 692 L☉ |
| Surface gravity (log g) | 3.43 cgs |
| Temperature | 11,843±156 K |
| Metallicity | +0.10 dex |
| Age | 194 Myr |
| Other designations | |
| 28 G. Telescopii[9], CD−50°12122, CPD−50°10815, GC 25645, HD 173047, HIP 92072, SAO 245693 | |
| Database references | |
| SIMBAD | data |
HD 173047 is a solitary, bluish-white hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.24, placing it near the limit for naked eye visibility, even under ideal conditions. The object is located relatively far at a distance of 1,050 light-years based on Gaia DR3 parallax measurements, but it is drifting closer with a heliocentric radial velocity of −10.7 km/s. At its current distance, HHD 173047's brightness is heavily diminished by 0.44 magnitudes due to interstellar extinction and it has an absolute magnitude of −1.52
HD 173047 has a stellar classification of B8/9 II, indicating that it is an evolved B-type star with the characteristics of a B8 and B9 bright giant. It has 4 times the mass of the Sun and a slightly enlarged radius 5.54 times that of the Sun's. It radiates a bolometric luminosity 692 times that of the Sun's from its photosphere at an effective temperature of 11,843 K HD 173047 is metal enriched with an iron abundance 126% that of the Sun's ( = +0.10) and it is estimated to be 194 million years old.
References
- ^ 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.
- ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 – L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361. S2CID 17128864.
- ^ Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars: Declinations −53° to −40°. Vol. 2. Bibcode:1978mcts.book.....H.
- ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
- ^ Hohle, M.M.; Neuhäuser, R.; Schutz, B.F. (April 2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349–360. arXiv:1003.2335. Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355. eISSN 1521-3994. ISSN 0004-6337. S2CID 111387483.
- ^ Anders, F.; et al. (February 2022). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy & Astrophysics. 658: A91. arXiv:2111.01860. Bibcode:2022A&A...658A..91A. doi:10.1051/0004-6361/202142369. eISSN 1432-0746. ISSN 0004-6361.
- ^ Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881. hdl:1721.1/124721. S2CID 166227927.
- ^ Gontcharov, G. A. (November 2012). "Spatial distribution and kinematics of OB stars". Astronomy Letters. 38 (11): 694–706. arXiv:1606.09028. Bibcode:2012AstL...38..694G. doi:10.1134/S1063773712110035. eISSN 1562-6873. ISSN 1063-7737. S2CID 255202762.
- Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.
- "HD 173047". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved August 1, 2023.
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