Astronomy:HD 173047
| Observation data Epoch J2000.0 Equinox (celestial coordinates) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 18h 45m 55.99514s[1] |
| Declination | −50° 52′ 21.7342″[1] |
| Apparent magnitude (V) | 6.24±0.01[2] |
| Characteristics | |
| Spectral type | B8/9 II[3] |
| B−V color index | −0.080±0.006[4] |
| Astrometry | |
| Radial velocity (Rv) | −10.7±0.4[1] km/s |
| Proper motion (μ) | RA: +3.697[1] mas/yr Dec.: −15.975[1] mas/yr |
| Parallax (π) | 3.1031 ± 0.0499[1] mas |
| Distance | 1,050 ± 20 ly (322 ± 5 pc) |
| Absolute magnitude (MV) | −1.52[4] |
| Details | |
| Mass | 4.00±0.11[5] M☉ |
| Radius | 5.54+0.15−0.14[1] R☉ |
| Luminosity (bolometric) | 692[5] L☉ |
| Surface gravity (log g) | 3.43[6] cgs |
| Temperature | 11,843±156[7] K |
| Metallicity [Fe/H] | +0.10[6] dex |
| Age | 194[8] Myr |
| Other designations | |
| 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,[2] 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.[1] At its current distance, HHD 173047's brightness is heavily diminished by 0.44 magnitudes due to interstellar extinction[8] and it has an absolute magnitude of −1.52[4]
HD 173047 has a stellar classification of B8/9 II,[3] 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[5] and a slightly enlarged radius 5.54 times that of the Sun's.[1] It radiates a bolometric luminosity 692 times that of the Sun's[5] from its photosphere at an effective temperature of 11,843 K[7] HD 173047 is metal enriched with an iron abundance 126% that of the Sun's ([Fe/H] = +0.10)[6] and it is estimated to be 194 million years old.[8]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H.
- ↑ 3.0 3.1 Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars: Declinations −53° to −40°. 2. Bibcode: 1978mcts.book.....H.
- ↑ 4.0 4.1 4.2 Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A.
- ↑ 5.0 5.1 5.2 5.3 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. doi:10.1002/asna.200911355. ISSN 0004-6337. Bibcode: 2010AN....331..349H.
- ↑ 6.0 6.1 6.2 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. doi:10.1051/0004-6361/202142369. ISSN 0004-6361. Bibcode: 2022A&A...658A..91A.
- ↑ 7.0 7.1 Stassun, Keivan G. et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ 8.0 8.1 8.2 Gontcharov, G. A. (November 2012). "Spatial distribution and kinematics of OB stars". Astronomy Letters 38 (11): 694–706. doi:10.1134/S1063773712110035. ISSN 1063-7737. Bibcode: 2012AstL...38..694G.
- ↑ "HD 173047". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+173047.
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