CP Boötis
CP Boötis
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
Constellation | Boötes |
Right ascension | 14h 33m 20.26330s[1] |
Declination | +36° 57′ 32.4483″[1] |
Apparent magnitude (V) | 6.40[2] |
| Characteristics | |
Evolutionary stage | subgiant[3] |
Spectral type | F8 IVw[4] |
| U−B color index | 0.07[2] |
| B−V color index | 0.51[2] |
Variable type | δ Sct[5] |
| Astrometry | |
| Radial velocity (Rv) | +5.9[6] km/s |
| Proper motion (μ) | RA: +2.694[1] mas/yr Dec.: −73.096[1] mas/yr |
| Parallax (π) | 12.9135 ± 0.0244[1] mas |
| Distance | 252.6 ± 0.5 ly (77.4 ± 0.1 pc) |
| Absolute magnitude (MV) | 2.05[2] |
| Details | |
| Mass | 1.77[6] M☉ |
| Luminosity | 7001120000000000000♠12.0+1.5 −1.3[7] L☉ |
| Surface gravity (log g) | 3.67[6] cgs |
| Temperature | 6,276[6] K |
Metallicity [Fe/H] | 0.25[6] dex |
| Rotational velocity (v sin i) | 5.7[3] km/s |
| Age | 1.70[6] Gyr |
| Other designations | |
CP Boo, BD+37° 2545, HD 127986, HIP 71168, HR 5441, SAO 64212[8] | |
| Database references | |
| SIMBAD | data |
CP Boötis is a yellow-white hued star in the northern constellation of Boötes. With a baseline apparent visual magnitude of 6.40,[2] it is at or near the lower limit for visibility with the typical naked eye in good viewing conditions. The distance to this star can be estimated from its annual parallax shift of 6992625894462312412♠12.91 mas,[1] which yields a range of 252.6 light years. It is moving further away with a heliocentric radial velocity of +5.9 km/s.[6]
This is an F-type subgiant star with a stellar classification of F8 IVw,[4] which indicates it has nearly consumed the hydrogen at its core and is now evolving into a giant star. It is a low amplitude Delta Scuti variable[9] that varies by 0.02 magnitude.[10] At the age of 1.7[6] billion years it is spinning with a projected rotational velocity of 5.7 km/s.[3] The star has 1.77[6] times the mass of the Sun and is radiating 12[7] times the Sun's luminosity from its photosphere at an effective temperature of 6,276 K.[6]
References[edit]
^ abcdef 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..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
^ abcde Karatas, Y.; Schuster, W. J. (October 2006), "Metallicity and absolute magnitude calibrations for UBV photometry", Monthly Notices of the Royal Astronomical Society, 371 (4): 1793–1812, Bibcode:2006MNRAS.371.1793K, doi:10.1111/j.1365-2966.2006.10800.x.
^ abc Lèbre, A.; et al. (1999), "Lithium and rotation on the subgiant branch. I. Observations and spectral analysis", Astronomy and Astrophysics, 345: 936, Bibcode:1999A&A...345..936L.
^ ab Barry, Don C. (January 1970), "Spectral classification of A & F stars", Astrophysical Journal Supplement, 19: 281, Bibcode:1970ApJS...19..281B, doi:10.1086/190209
^ Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017), "General catalogue of variable stars: Version GCVS 5.1", Astronomy Reports, 61: 80, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085.
See:
CP Boo
^ abcdefghij Casagrande, L.; et al. (June 2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy and Astrophysics, 530: A138, arXiv:1103.4651, Bibcode:2011A&A...530A.138C, doi:10.1051/0004-6361/201016276.
^ ab do Nascimento, J. D., Jr.; et al. (May 2000), "Lithium and rotation on the subgiant branch. II. Theoretical analysis of observations", Astronomy and Astrophysics, 357: 931–937, arXiv:astro-ph/0003010, Bibcode:2000A&A...357..931D.
^ "HD 127986". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 23 August 2018.
^ Galeev, A. I.; et al. (November 2012), "Chemical composition of δ Scuti stars: 1. AO CVn, CP Boo, KW Aur", Astronomy Reports, 56 (11): 850–866, Bibcode:2012ARep...56..850G, doi:10.1134/S1063772912110029
^ Watson, Christopher (January 4, 2010), "CP Boötis", AAVSO Website, American Association of Variable Star Observers, retrieved 3 August 2014.
External links[edit]
- HR 5441
Categories:
- F-type subgiants
- Delta Scuti variables
- Boötes
- Durchmusterung objects
- Henry Draper Catalogue objects
- Hipparcos objects
- HR objects
- Objects with variable star designations
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