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13 Boötis









13 Boötis


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13 Boötis
Observation data
Epoch J2000      Equinox J2000

Constellation
Boötes

Right ascension
 14h 08m 17.30262s[1]

Declination
 +49° 27′ 29.4029″[1]

Apparent magnitude (V)
 5.29 - 5.38[2]
Characteristics

Spectral type
 M1.5III[3]
U−B color index
 +1.92[4]
B−V color index
 +1.63[4]

Variable type
Lb[2]
Astrometry
Radial velocity (Rv) -13.92 ± 0.06[5] km/s
Proper motion (μ) RA: -59.57[1] mas/yr
Dec.: 60.42[1] mas/yr
Parallax (π) 5.94 ± 0.25[1] mas
Distance 550 ± 20 ly
(168 ± 7 pc)
Details
Mass 0.8-2.6[6] M☉
Other designations
CF Boötis, HR 5300, HD 123782, BD+50°2047, FK5 3124, HIP 69068, SAO 44905, GC 19095, CCDM 14082+4927.
Database references
SIMBAD data

13 Boötis, also known by its variable star designation CF Boötis, is a variable star in the constellation Boötes. It is approximately 550 light-years from Earth, based on its parallax.[1] 13 Boötis is a M-type red giant with a mean apparent magnitude of +5.26. It is classified as an irregular variable star and its brightness varies from magnitude +5.29 to +5.38.



Possible planetary system[edit]


In 1991, Duquennoy & Mayor[7] reported the possible presence of a low-mass object (of likely substellar nature) orbiting the red giant 13 Bootis. They set a minimum mass of 30 times that of Jupiter (likely a brown dwarf) and estimated an orbital period of 1.35 years. So far there has been no confirmation about the presence a substellar object.
























The 13 Boötis planetary system
Companion
(in order from star)
Mass
Semimajor axis
(AU)
Orbital period
(days)
Eccentricity
Inclination
Radius

b (unconfirmed)
 ≥30 MJ
 ≥1.25
 494
 0.21
 —
 —


References[edit]





  1. ^ abcdef van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357..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}
    Vizier catalog entry


  2. ^ ab Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.


  3. ^ "* 13 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 25 May 2017.


  4. ^ ab Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. Bibcode:1986EgUBV........0M.


  5. ^ Famaey, B.; Pourbaix, D.; Frankowski, A.; Van Eck, S.; Mayor, M.; Udry, S.; Jorissen, A. (2009). "Spectroscopic binaries among Hipparcos M giants". Astronomy and Astrophysics. 498 (2): 627. arXiv:0901.0934. Bibcode:2009A&A...498..627F. doi:10.1051/0004-6361/200810698.


  6. ^ Alvarez & Menessier (1997). "Determination of Miras temperatures from TiO and VO bands. Estimates of distances". Astronomy and Astrophysics. 317: 761–768. Bibcode:1997A&A...317..761A.


  7. ^ Duquennoy & Mayor (1991). "Multiplicity among solar-type stars in the solar neighbourhood. II - Distribution of the orbital elements in an unbiased sample". Astronomy and Astrophysics. 248 (2): 485–524. Bibcode:1991A&A...248..485D.




External links[edit]



  • HR 5300

  • CCDM J14082+4927

  • Image 13 Boötis

  • [1]

  • [2]











Retrieved from "https://en.wikipedia.org/w/index.php?title=13_Boötis&oldid=843107931"





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