 6 Boötis in optical light. | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| 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 | |
| Radius | 38 [5] R☉ |
| Luminosity | 430.124 [1] L☉ |
| Surface gravity (log g) | 1.910 [6] cgs |
| Temperature | 4,050 [6] K |
| Metallicity [Fe/H] | −0.24 [6] dex |
| Rotational velocity (v sin i) | 2.0 [7] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
6 Boötis is a binary star [4] system in the northern constellation of Boötes, [8] located around 460 light years away from the Sun. [1] It has the Bayer designation e Boötis; 6 Boötis is the Flamsteed designation. [8] 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. [9] At the estimated distance of the star, this yields a physical size of about 38 times the radius of the Sun. [5] The star is radiating 430 [1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,050 K. [6] Its companion is probably a low mass red dwarf of around class M8 V. [4]
References
- ^ a b c d e f g h i 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.
- ^ a b c d e 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.
- ^ a b 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.
- ^ a b c d e Griffin, R. F. (June 1985), "Spectroscopic binaries near the North Galactic Pole. Paper 12 : 6 Bootis.", Journal of Astrophysics and Astronomy, 6: 77–83, Bibcode: 1985JApA....6...77G, doi: 10.1007/BF02715079, S2CID 124682374.
- ^
a
b Lang, Kenneth R. (2006),
Astrophysical formulae, Astronomy and astrophysics library, vol. 1 (3rd ed.),
Birkhäuser,
ISBN
3-540-29692-1. The radius (R*) is given by:
- ^ a b c d 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.
- ^ a b c "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.
6 Boötis in optical light. | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| 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 | |
| Radius | 38 [5] R☉ |
| Luminosity | 430.124 [1] L☉ |
| Surface gravity (log g) | 1.910 [6] cgs |
| Temperature | 4,050 [6] K |
| Metallicity [Fe/H] | −0.24 [6] dex |
| Rotational velocity (v sin i) | 2.0 [7] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
6 Boötis is a binary star [4] system in the northern constellation of Boötes, [8] located around 460 light years away from the Sun. [1] It has the Bayer designation e Boötis; 6 Boötis is the Flamsteed designation. [8] 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. [9] At the estimated distance of the star, this yields a physical size of about 38 times the radius of the Sun. [5] The star is radiating 430 [1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,050 K. [6] Its companion is probably a low mass red dwarf of around class M8 V. [4]
References
- ^ a b c d e f g h i 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.
- ^ a b c d e 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.
- ^ a b 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.
- ^ a b c d e Griffin, R. F. (June 1985), "Spectroscopic binaries near the North Galactic Pole. Paper 12 : 6 Bootis.", Journal of Astrophysics and Astronomy, 6: 77–83, Bibcode: 1985JApA....6...77G, doi: 10.1007/BF02715079, S2CID 124682374.
- ^
a
b Lang, Kenneth R. (2006),
Astrophysical formulae, Astronomy and astrophysics library, vol. 1 (3rd ed.),
Birkhäuser,
ISBN
3-540-29692-1. The radius (R*) is given by:
- ^ a b c d 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.
- ^ a b c "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.
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