Astronomy:BD−17 63

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Short description: Star in the constellation Cetus
BD-17 63/Felixvarela
Observation data
Equinox J2000.0]] (ICRS)
Constellation Cetus
Right ascension  00h 28m 34.306s[1]
Declination −16° 13′ 34.84″[1]
Apparent magnitude (V) 9.62[2]
Characteristics
Spectral type K4V(k)[3]
Apparent magnitude (B) 10.748[2]
Apparent magnitude (J) 7.574±0.019[2]
Apparent magnitude (H) 7.027±0.033[2]
Apparent magnitude (K) 6.914±0.024[2]
B−V color index 1.128±0.010[2]
Astrometry
Radial velocity (Rv)2.93±0.15[1] km/s
Proper motion (μ) RA: −354.939(22)[1] mas/yr
Dec.: −227.995(15)[1] mas/yr
Parallax (π)28.9723 ± 0.0212[1] mas
Distance112.58 ± 0.08 ly
(34.52 ± 0.03 pc)
Absolute magnitude (MV)6.86[2]
Details
Mass0.72±0.01[4] M☉
Radius0.70±0.01[4] R☉
Luminosity0.212±0.001[4] L☉
Surface gravity (log g)4.6±0.01[4] cgs
Temperature4,692±9[4] K
Metallicity [Fe/H]−0.03±0.06[5] dex
Rotational velocity (v sin i)1.5[5] km/s
Age10.5±2.6 Gyr[4]
4.3±4[5] Gyr
Other designations
Felixvarela, HIP 2247, SAO 147293, PPM 208851, 2MASS J00283433-1613343[6]
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

BD−17 63 is a low-mass K-type main-sequence star in the southern constellation Cetus. It is a 10th magnitude star at a distance of 113 light-years from Earth.[1] The star is rotating slowly with a negligible level of magnetic activity and an age of over 4 billion years.[5]

The star BD-17 63 is named Felixvarela. The name was selected in the NameExoWorlds campaign by Cuba, during the 100th anniversary of the IAU. Felix Varela (1788–1853) was the first to teach science in Cuba.[7][8]

Planetary system

In October 2008 an exoplanet, BD−17 63 b, was reported to be orbiting this star on an eccentric orbit. This object was detected using the radial velocity method by search programs conducted using the HARPS spectrograph.[5] An astrometric measurement of the planet's inclination and true mass was published in 2022 as part of Gaia DR3,[9][10] with another astrometric orbital solution published in 2023.[11]

The BD−17 63 planetary system[11]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b / Finlay 5.325±0.036 MJ 1.361±0.021 655.641+0.070
−0.076 		0.5455±0.0025 82.4+2.8
−2.0° 		—

See also

  • List of extrasolar planets

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. 
  3. ↑ Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (July 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal 132 (1): 161–170. doi:10.1086/504637. Bibcode: 2006AJ....132..161G. 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Bonfanti, A. et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics 575: A18. doi:10.1051/0004-6361/201424951. Bibcode: 2015A&A...575A..18B. 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 Moutou, C. et al. (2009). "The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, HD 153950". Astronomy and Astrophysics 496 (2): 513–519. doi:10.1051/0004-6361:200810941. Bibcode: 2009A&A...496..513M. 
  6. ↑ "SIMBAD query result: G 158-84 -- High proper-motion Star". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=BD-17+63. 
  7. ↑ "Approved names" (in en). http://www.nameexoworlds.iau.org/final-results. 
  8. ↑ "International Astronomical Union | IAU". https://www.iau.org/news/pressreleases/detail/iau1912/. 
  9. ↑ Gaia Collaboration et al. (June 2023). "Gaia Data Release 3: Stellar multiplicity, a teaser for the hidden treasure". Astronomy & Astrophysics 674: A34. doi:10.1051/0004-6361/202243782. Bibcode: 2023A&A...674A..34G. 
  10. ↑ Winn, Joshua N. (September 2022). "Joint Constraints on Exoplanetary Orbits from Gaia DR3 and Doppler Data". The Astronomical Journal 164 (5): 196. doi:10.3847/1538-3881/ac9126. Bibcode: 2022AJ....164..196W. 
  11. ↑ 11.0 11.1 Unger, N. et al. (December 2023). "Exploring the brown dwarf desert with precision radial velocities and Gaia DR3 astrometric orbits". Astronomy & Astrophysics 680: A16. doi:10.1051/0004-6361/202347578. Bibcode: 2023A&A...680A..16U. 

Coordinates: Sky map 00h 28m 34.306s, −16° 13′ 34.84″



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