Astronomy:HD 191829
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Short description: High proper motion red giant star in the constellation of Telescopium
| Observation data Epoch J2000.0 Equinox (celestial coordinates) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 20h 14m 19.0252s[1] |
| Declination | −52° 26′ 44.7553″[1] |
| Apparent magnitude (V) | 5.632±0.009[2] |
| Characteristics | |
| Spectral type | K4 III[3] |
| B−V color index | +1.5[4] |
| Astrometry | |
| Radial velocity (Rv) | 14±3[5] km/s |
| Proper motion (μ) | RA: +25.493[1] mas/yr Dec.: −54.246[1] mas/yr |
| Parallax (π) | 4.5849 ± 0.1152[1] mas |
| Distance | 710 ± 20 ly (218 ± 5 pc) |
| Absolute magnitude (MV) | −0.95[6] |
| Details | |
| Mass | 1.17[7] M☉ |
| Radius | 46.44[8] R☉ |
| Luminosity | 561[9] L☉ |
| Surface gravity (log g) | 1.13[7] cgs |
| Temperature | 3,800[7] K |
| Metallicity [Fe/H] | +0.13[7] dex |
| Rotational velocity (v sin i) | 2.2±1.2[10] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 191829 (HR 7714) is a solitary[11] star located in the southern constellation Telescopium. It has an apparent magnitude of 5.632, making it faintly visible to the naked eye if viewed under ideal conditions. The star is situated at a distance of 710 light years but is receding with a heliocentric radial velocity of 14 km/s.
HD 191829 has a stellar classification of K4 III, indicating that the object is an ageing K-type giant.[3] It has an angular diameter of 1.98±0.16,[12] yielding a diameter 47 times that of the Sun at its estimated distance.[8] At present it has 117% the mass of the Sun[7] and shines at 561 solar luminosity[9] from its enlarged photosphere at an effective temperature of 3,800 K,[7] giving it an orange glow. HD 191829 has a metallicity 135% that of the Sun[7] and spins modestly with a projected rotational velocity of 2.4 km/s.[10]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 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. Bibcode: 1978mcts.book.....H.
- ↑ Corben, P. M. (1966). "Photoelectric magnitudes and colours for bright southern stars". Monthly Notes of the Astronomical Society of South Africa 25: 44. ISSN 0024-8266. Bibcode: 1966MNSSA..25...44C.
- ↑ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G.
- ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation" (in en). Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A.
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A. et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics 628: A94. doi:10.1051/0004-6361/201935765. ISSN 0004-6361. Bibcode: 2019A&A...628A..94A.
- ↑ 8.0 8.1 Stassun, Keivan G. et al. (2019-10-01). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256. Bibcode: 2019AJ....158..138S.
- ↑ 9.0 9.1 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 10.0 10.1 De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars: V. Southern stars⋆⋆⋆". Astronomy & Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. ISSN 0004-6361. Bibcode: 2014A&A...561A.126D.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E
- ↑ Bourgés, L.; Lafrasse, S.; Mella, G.; Chesneau, O.; Bouquin, J. L.; Duvert, G.; Chelli, A.; Delfosse, X. (May 2014). "The JMMC Stellar Diameters Catalog v2 (JSDC): A New Release Based on SearchCal Improvements". Astronomical Data Analysis Software and Systems Xxiii 485: 223. Bibcode: 2014ASPC..485..223B.
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