6 Boötis
  | |
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Boötes |
| Right ascension | 13h 49m 42.82223s[1] |
| Declination | +21° 15′ 50.8580″[1] |
| Apparent magnitude (V) | 4.92[2] |
| Characteristics | |
| Spectral type | K4 III[3] + M8 V[4] |
| B−V color index | 1.432±0.013[2] |
| Astrometry | |
| Radial velocity (Rv) | −3.71±0.48[1] km/s |
| Proper motion (μ) | RA: +33.773[1] mas/yr Dec.: +10.842[1] mas/yr |
| Parallax (π) | 7.1527±0.3659 mas[1] |
| Distance | 460 ± 20 ly (140 ± 7 pc) |
| Absolute magnitude (MV) | −0.49[2] |
| Orbit[4] | |
| Period (P) | 944±8 d |
| Eccentricity (e) | 0.41±0.09 |
| Periastron epoch (T) | 2,444,739.5±31.0 JD |
| Argument of periastron (ω) (secondary) | 359±15° |
| Semi-amplitude (K1) (primary) | 1.19±0.15 km/s |
| Details | |
| Mass | 5.0[5] M☉ |
| Radius | 36[6] R☉ |
| Luminosity | 382[6] L☉ |
| Surface gravity (log g) | 1.49[7] cgs |
| Temperature | 4,185[7] K |
| Metallicity [Fe/H] | −0.24[8] dex |
| Rotational velocity (v sin i) | 2.0[9] km/s |
| Age | 1.9[7] Gyr |
| Other designations | |
| e Boötis, 6 Boo, BD+21°2578, FK5 3098, GC 18683, HD 120539, HIP 67480, HR 5201, SAO 83015[10] | |
| Database references | |
| SIMBAD | data |
6 Boötis is a binary star[4] system in the northern constellation of Boötes,[10] located around 460 light years away from the Sun.[1] It has the Bayer designation e Boötis; 6 Boötis is the Flamsteed designation.[10] The system is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.92.[2] It is moving closer to the Earth with a heliocentric radial velocity of −3 km/s.[2]
This is a single-lined spectroscopic binary system with an orbital period of 2.58 years and an eccentricity of 0.4.[4] The visible component is an evolved giant star with a stellar classification of K4 III.[3] Its measured angular diameter is 2.53±0.12 mas.[11] At the estimated distance of the star, this yields a physical size of about 36 times the radius of the Sun.[6] The star is radiating 382 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,185 K.[7] Its companion is probably a low mass red dwarf of around class M8 V.[4]
References
- 1 2 3 4 5 6 7 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.
- 1 2 3 4 5 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, S2CID 119257644.
- 1 2 Yoss, K. M.; Griffin, R. F. (September 1997), "Radial Velocities and DDO, BV Photometry of Henry Draper G5-M Stars Near the North Galactic Pole", Journal of Astrophysics and Astronomy, 18 (2–3): 161, Bibcode:1997JApA...18..161Y, doi:10.1007/BF02714877, S2CID 123221180.
- 1 2 3 4 5 Griffin, R. F. (June 1985), "Spectroscopic binaries near the North Galactic Pole. Paper 12 : 6 Bootis.", Journal of Astrophysics and Astronomy, 6 (2): 77–83, Bibcode:1985JApA....6...77G, doi:10.1007/BF02715079, S2CID 124682374.
- ↑ 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 3 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.
- 1 2 3 4 Kordopatis, G.; Schultheis, M.; McMillan, P. J.; Palicio, P. A.; De Laverny, P.; Recio-Blanco, A.; Creevey, O.; Álvarez, M. A.; Andrae, R.; Poggio, E.; Spitoni, E.; Contursi, G.; Zhao, H.; Oreshina-Slezak, I.; Ordenovic, C.; Bijaoui, A. (2023). "Stellar ages, masses, extinctions, and orbital parameters based on spectroscopic parameters of Gaia DR3". Astronomy and Astrophysics. 669: A104. arXiv:2206.07937. Bibcode:2023A&A...669A.104K. doi:10.1051/0004-6361/202244283.
- ↑ McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances", Astrophysical Journal Supplement Series, 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi:10.1086/191527
- ↑ De Medeiros, J. R.; et al. (October 2002), "The Rotation of Binary Systems with Evolved Components", The Astrophysical Journal, 578 (2): 943–950, arXiv:astro-ph/0207288, Bibcode:2002ApJ...578..943D, doi:10.1086/342613, S2CID 16196039.
- 1 2 3 "6 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-04-23.
- ↑ Richichi, A.; et al. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039.
