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]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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) 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 (MV) | 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 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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 edit
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]
| 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 edit
References edit
- ^ 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. 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.