BD−17 63

BD-17 63/Felixvarela
Observation data; Epoch J2000 Equinox J2000
Constellation	Cetus
Right ascension	00h 28m 34.306s
Declination	−16° 13′ 34.84″
Apparent magnitude (V)	9.62
Characteristics
Spectral type	K4V(k)
Apparent magnitude (B)	10.748
Apparent magnitude (J)	7.574±0.019
Apparent magnitude (H)	7.027±0.033
Apparent magnitude (K)	6.914±0.024
B−V color index	1.128±0.010
Astrometry
Radial velocity (Rv)	2.93±0.15 km/s
Proper motion (μ)	RA: −354.939(22) mas/yr ; Dec.: −227.995(15) mas/yr
Parallax (π)	28.9723±0.0212 mas
Distance	112.58 ± 0.08 ly ; (34.52 ± 0.03 pc)
Absolute magnitude (MV)	6.86
Details
Mass	0.72±0.01 M☉
Radius	0.70±0.01 R☉
Luminosity	0.212±0.001 L☉
Surface gravity (log g)	4.6±0.01 cgs
Temperature	4,692±9 K
Metallicity [Fe/H]	−0.03±0.06 dex
Rotational velocity (v sin i)	1.5 km/s
Age	10.5±2.6 Gyr; 4.3±4 Gyr
Other designations
	Felixvarela, HIP 2247, SAO 147293, PPM 208851, 2MASS J00283433-1613343
Database references
SIMBAD	data
Exoplanet Archive	data

BD−17 63 is a 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 $M$ _J	1.361±0.021	655.641+0.070 −0.076	0.5455±0.0025	82.4+2.8 −2.0°	—

References

^ ^a ^b ^c ^d ^e ^f 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.
^ ^a ^b ^c ^d ^e ^f ^g 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.
^ 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. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637.
^ ^a ^b ^c ^d ^e ^f Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951. S2CID 54555839.
^ ^a ^b ^c ^d ^e 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. arXiv:0810.4662. Bibcode:2009A&A...496..513M. doi:10.1051/0004-6361:200810941. S2CID 116707055.
^ "SIMBAD query result: G 158-84 -- High proper-motion Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-06-11.
^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
^ "International Astronomical Union | IAU". www.iau.org. Archived from the original on 2022-12-05. Retrieved 2020-01-02.
^ Gaia Collaboration; et al. (June 2023). "Gaia Data Release 3: Stellar multiplicity, a teaser for the hidden treasure". Astronomy & Astrophysics. 674: A34. arXiv:2206.05595. Bibcode:2023A&A...674A..34G. doi:10.1051/0004-6361/202243782.
^ Winn, Joshua N. (September 2022). "Joint Constraints on Exoplanetary Orbits from Gaia DR3 and Doppler Data". The Astronomical Journal. 164 (5): 196. arXiv:2209.05516. Bibcode:2022AJ....164..196W. doi:10.3847/1538-3881/ac9126. S2CID 252211643.
^ ^a ^b Unger, N.; Ségransan, D.; et al. (December 2023). "Exploring the brown dwarf desert with precision radial velocities and Gaia DR3 astrometric orbits". Astronomy & Astrophysics. 680: A16. arXiv:2310.02758. Bibcode:2023A&A...680A..16U. doi:10.1051/0004-6361/202347578.

[GaiaDR3-1] ^ ^a ^b ^c ^d ^e ^f 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.

[Anderson_Francis_2012-2] ^ ^a ^b ^c ^d ^e ^f ^g 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.

[gray2006-3] 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. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637.

[Bonfanti2015-4] ^ ^a ^b ^c ^d ^e ^f Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951. S2CID 54555839.

[Moutou2009-5] 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. arXiv:0810.4662. Bibcode:2009A&A...496..513M. doi:10.1051/0004-6361:200810941. S2CID 116707055.

[SIMBAD-6] "SIMBAD query result: G 158-84 -- High proper-motion Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-06-11.

[7] "Approved names". NameExoworlds. Retrieved 2020-01-02.

[8] "International Astronomical Union | IAU". www.iau.org. Archived from the original on 2022-12-05. Retrieved 2020-01-02.

[GaiaDR3Exoplanets-9] Gaia Collaboration; et al. (June 2023). "Gaia Data Release 3: Stellar multiplicity, a teaser for the hidden treasure". Astronomy & Astrophysics. 674: A34. arXiv:2206.05595. Bibcode:2023A&A...674A..34G. doi:10.1051/0004-6361/202243782.

[Winn2022-10] Winn, Joshua N. (September 2022). "Joint Constraints on Exoplanetary Orbits from Gaia DR3 and Doppler Data". The Astronomical Journal. 164 (5): 196. arXiv:2209.05516. Bibcode:2022AJ....164..196W. doi:10.3847/1538-3881/ac9126. S2CID 252211643.

[Unger2023-11] Unger, N.; Ségransan, D.; et al. (December 2023). "Exploring the brown dwarf desert with precision radial velocities and Gaia DR3 astrometric orbits". Astronomy & Astrophysics. 680: A16. arXiv:2310.02758. Bibcode:2023A&A...680A..16U. doi:10.1051/0004-6361/202347578.

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Observation data Epoch J2000 Equinox J2000
Constellation	Cetus
Right ascension	00^h 28^m 34.306^s^[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 (R_v)	2.93±0.15^[1] km/s
Proper motion (μ)	RA: −354.939(22) mas/yr^[1] Dec.: −227.995(15) mas/yr^[1]
Parallax (π)	28.9723±0.0212 mas^[1]
Distance	112.58 ± 0.08 ly (34.52 ± 0.03 pc)
Absolute magnitude (M_V)	6.86^[2]

Details

Mass	0.72±0.01^[4] `M`_☉
Radius	0.70±0.01^[4] `R`_☉
Luminosity	0.212±0.001^[4] `L`_☉
Surface gravity (log g)	4.6±0.01^[4] cgs
Temperature	4,692±9^[4] K
Metallicity [Fe/H]	−0.03±0.06^[5] dex
Rotational velocity (v sin i)	1.5^[5] km/s
Age	10.5±2.6 Gyr^[4] 4.3±4^[5] Gyr

Other designations
Felixvarela, HIP 2247, SAO 147293, PPM 208851, 2MASS J00283433-1613343^[6]
Database references
SIMBAD	data
Exoplanet Archive	data

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