HD 66141
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Canis Minor |
| Right ascension | 08h 02m 15.94s |
| Declination | +2° 20′ 4.45″ |
| Apparent magnitude (V) | +4.39 |
| Characteristics | |
| Spectral type | K2III[1] |
| Astrometry | |
| Parallax (π) | 12.84 mas ± 0.25 mas mas |
| Distance | 254 ± 6.5 ly (77.9 ± 2 pc) |
| Details | |
| Mass | 1.1 ± 0.1[1] M☉ |
| Radius | 21.4 ± 0.6[1] R☉ |
| Luminosity | 174 L☉ |
| Surface gravity (log g) | 1.3 ± 0.5,[2] 1.78 ± 0.04[citation needed] cgs |
| Temperature | 4305 ± 15[2] K |
| Metallicity | -0.32 ± 0.034[1] |
| Rotation | 1.5[2] |
| Age | 6.84 ± 1.39 × 109[1] years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 66141, also known as HR 3145 and 50 G. Canis Minoris, is the main star of a binary system[citation needed][3] in the constellation Canis Minor. It is an orange K-type giant, approximately 254 light years from Earth. Its apparent magnitude is +4.39.
When first catalogued it was in the Puppis constellation and was designated "13 Puppis", but it subsequently migrated to Canis Minor.[4] Bode gave it the Bayer designation of Lambda Canis Minoris.[5]
Over 2003 to 2012 a starspot was periodically dimming its light.[2]
Planetary system
From December 2003 to January 2012, the team B.-C. Lee, I. Han, and M.-G. Park observed "HD 66141" with "the fiber-fed Bohyunsan Observatory Echelle Spectrograph (BOES) at Bohyunsan Optical Astronomy Observatory (BOAO)".[2]
In 2012, a long-period, wide-orbiting planet was deduced by radial velocity. This was published in November.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >6 ± 0.3 MJ | 1.2 ± 0.1 | 480.5 ± 0.5 | 0.07 ± 0.03 | — | — |
References
- ^ a b c d e f "hd_66141_b".
- ^ a b c d e B.-C. Lee; D. E. Mkrtichian; I. Han; M.-G. Park; K.-M. Kim (2012). "Detection of an exoplanet around the evolved K giant HD 66141". Astronomy & Astrophysics. arXiv:1211.2054. Bibcode:2012A&A...548A.118L. doi:10.1051/0004-6361/201118014.
- ^ SIMBAD?
- ^ Griffin, R. F. (1999). "Spectroscopic binary orbits from photoelectric radial velocities. Paper 148: HR 7955". The Observatory. 119: 272–283. Bibcode:1999Obs...119..272G.
- ^ Wagman, Morton (2003). Lost Stars: Lost, Missing and Troublesome Stars from the Catalogues of Johannes Bayer, Nicholas Louis de Lacaille, John Flamsteed, and Sundry Others. Blacksburg, VA: The McDonald & Woodward Publishing Company. p. 460. ISBN 978-0-939923-78-6.
