HD 193472
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Delphinus |
| Right ascension | 20h 20m 00.1887s |
| Declination | +13° 32′ 53.118″ |
| Apparent magnitude (V) | 5.94±0.01 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | kA4hF0mF |
| U−B color index | +0.12 |
| B−V color index | +0.28 |
| Astrometry | |
| Radial velocity (Rv) | −8.00±1.78 km/s |
| Proper motion (μ) | RA: −3.900 mas/yr Dec.: −5.007 mas/yr |
| Parallax (π) | 11.5644±0.0547 mas |
| Distance | 282 ± 1 ly (86.5 ± 0.4 pc) |
| Absolute magnitude (MV) | +1.44 |
| Details | |
| Mass | 1.61±0.25 M☉ |
| Radius | 3.15±0.11 R☉ |
| Luminosity | 23.9±0.9 L☉ |
| Surface gravity (log g) | 3.65±0.08 cgs |
| Temperature | 7,188±114 K |
| Metallicity [Fe/H] | +0.43±0.20 dex |
| Rotational velocity (v sin i) | 105 km/s |
| Age | 1.02+0.18 −0.16 Gyr |
| Other designations | |
| AG+13°2095, BD+13°4360, GC 28275, HD 193472, HIP 100256, HR 7774, SAO 105974 | |
| Database references | |
| SIMBAD | data |
HD 193472 (HR 7774) is a solitary star in the equatorial constellation Delphinus. It has an apparent magnitude of 5.94, making it visible with the naked eye if viewed under ideal conditions. Parallax measurements put it at a distance of 282 light years and has a radial velocity of −8 km/s, indicating that the object drifting towards the Solar System.
HD 193472 has a stellar classification of kA4hF0mF, indicating that its an Am star with the calcium K-line of an A4 star, the hydrogen lines and effective temperature of a F0 star, and the metallic lines of a F2 star. Due to a radius over three times that of the Sun and a relatively low surface gravity, it appears to be slightly evolved. HD 193472 has 161% the mass of the Sun and shines at 24 times the luminosity of the Sun from its photosphere at an effective temperature of 7,188 K, giving it a yellowish white glow. HD 193472 has a projected rotational velocity of 105 km/s.
References
- 1 2 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.
- 1 2 3 4 5 6 7 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.
- 1 2 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.
- ↑ Abt, Helmut A.; Morrell, Nidia I. (July 1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series. 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182. ISSN 0067-0049.
- ↑ Skiff, B. A. (2014). "VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009- )". Vizier Online Data Catalog. Bibcode:2014yCat....1.2023S.
- 1 2 Mendoza, E. E.; Gomez, V. T.; Gonzalez, S. (June 1978). "UBVRI photometry of 225 AM stars". The Astronomical Journal. 83: 606. Bibcode:1978AJ.....83..606M. doi:10.1086/112242. ISSN 0004-6256.
- 1 2 Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (November 2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889–896. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. ISSN 0004-6337.
- 1 2 3 4 5 Stassun, Keivan G.; et al. (2019-10-01). "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. hdl:1721.1/124721. ISSN 0004-6256. S2CID 166227927.
- ↑ Gáspár, András; et al. (2016). "The Correlation between Metallicity and Debris Disk Mass". The Astrophysical Journal. 826 (2): 171. arXiv:1604.07403. Bibcode:2016ApJ...826..171G. doi:10.3847/0004-637X/826/2/171. S2CID 119241004.
- 1 2 Royer, F.; Grenier, S.; Baylac, M.-O.; Gómez, A. E.; Zorec, J. (October 2002). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 393 (3): 897–911. arXiv:astro-ph/0205255. Bibcode:2002A&A...393..897R. doi:10.1051/0004-6361:20020943. eISSN 1432-0746. ISSN 0004-6361.
- ↑ Kunzli, M.; North, P. (1998). "Behaviour of calcium abundance in Am-Fm stars with evolution". Astronomy and Astrophysics. 330: 651. arXiv:astro-ph/9710223. Bibcode:1998A&A...330..651K.
- ↑ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
