Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Canis Minor |
Right ascension | 08h 02m 15.93659s [1] |
Declination | +02° 20′ 04.4522″ [1] |
Apparent magnitude (V) | +4.39 [2] |
Characteristics | |
Spectral type | K2IIIbFe-0.5: [3] |
B−V color index | 1.252±0.008 [2] |
Astrometry | |
Radial velocity (Rv) | +71.57±0.01 [2] km/s |
Proper motion (μ) |
RA: −28.63
[1]
mas/
yr Dec.: 105.27 [1] mas/ yr |
Parallax (π) | 12.84 ± 0.25 mas [1] |
Distance | 254 ± 5
ly (78 ± 2 pc) |
Absolute magnitude (MV) | −0.07 [2] |
Details [4] | |
Mass | 0.98±0.06 M☉ |
Radius | 21.43±1.18 R☉ |
Luminosity | 166+43 −34 L☉ |
Surface gravity (log g) | 2.09±0.06 cgs |
Temperature | 4,328±21 K |
Metallicity [Fe/H] | −0.52±0.05 dex |
Rotational velocity (v sin i) | 1.91±0.45 km/s |
Age | 9.18±2.09 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
HD 66141 is a single [7] star in the equatorial constellation of Canis Minor. It has the Bayer designation G Canis Minoris, [5] the Gould designation 50 G. Canis Minoris, [6] and has the HR 3145 identifier from the Bright Star Catalogue. [5] When first catalogued it was in the Puppis constellation and was designated "13 Puppis", but it subsequently migrated to Canis Minor. [8] Bode gave it the Bayer designation of Lambda Canis Minoris. [9]
This star has an orange hue and is bright enough to be faintly visible to the naked eye on a dark night, having an apparent visual magnitude of +4.39. [2] It is located at a distance of approximately 254 light years from the Sun based on parallax, [1] and is drifting further away with a radial velocity of +71.6 km/s. [2] The star is considered a member of the thin disk population. [4] It has one known exoplanet companion. [10]
The stellar classification of HD 66141 is K2IIIbFe-0.5:, [3] which indicates an evolved K-type giant star with a mild underabundance of iron. It is an estimated nine billion years old with 0.98 times the mass of the Sun and has expanded to 21 times the Sun's radius. [4] Over 2003 to 2012 a starspot was periodically dimming its light. [10] The star is radiating 166 times the luminosity of the Sun from its photosphere at an effective temperature of 4,328 K. [4]
A magnitude 10.32 visual companion was reported by J. Glaisher in 1842. As of 2015, it was located at an angular separation of 224.90 arcseconds along a position angle of 315°. [11]
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)". [10]
In 2012, a long-period, wide-orbiting exoplanet 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 | — | — |
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Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Canis Minor |
Right ascension | 08h 02m 15.93659s [1] |
Declination | +02° 20′ 04.4522″ [1] |
Apparent magnitude (V) | +4.39 [2] |
Characteristics | |
Spectral type | K2IIIbFe-0.5: [3] |
B−V color index | 1.252±0.008 [2] |
Astrometry | |
Radial velocity (Rv) | +71.57±0.01 [2] km/s |
Proper motion (μ) |
RA: −28.63
[1]
mas/
yr Dec.: 105.27 [1] mas/ yr |
Parallax (π) | 12.84 ± 0.25 mas [1] |
Distance | 254 ± 5
ly (78 ± 2 pc) |
Absolute magnitude (MV) | −0.07 [2] |
Details [4] | |
Mass | 0.98±0.06 M☉ |
Radius | 21.43±1.18 R☉ |
Luminosity | 166+43 −34 L☉ |
Surface gravity (log g) | 2.09±0.06 cgs |
Temperature | 4,328±21 K |
Metallicity [Fe/H] | −0.52±0.05 dex |
Rotational velocity (v sin i) | 1.91±0.45 km/s |
Age | 9.18±2.09 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
HD 66141 is a single [7] star in the equatorial constellation of Canis Minor. It has the Bayer designation G Canis Minoris, [5] the Gould designation 50 G. Canis Minoris, [6] and has the HR 3145 identifier from the Bright Star Catalogue. [5] When first catalogued it was in the Puppis constellation and was designated "13 Puppis", but it subsequently migrated to Canis Minor. [8] Bode gave it the Bayer designation of Lambda Canis Minoris. [9]
This star has an orange hue and is bright enough to be faintly visible to the naked eye on a dark night, having an apparent visual magnitude of +4.39. [2] It is located at a distance of approximately 254 light years from the Sun based on parallax, [1] and is drifting further away with a radial velocity of +71.6 km/s. [2] The star is considered a member of the thin disk population. [4] It has one known exoplanet companion. [10]
The stellar classification of HD 66141 is K2IIIbFe-0.5:, [3] which indicates an evolved K-type giant star with a mild underabundance of iron. It is an estimated nine billion years old with 0.98 times the mass of the Sun and has expanded to 21 times the Sun's radius. [4] Over 2003 to 2012 a starspot was periodically dimming its light. [10] The star is radiating 166 times the luminosity of the Sun from its photosphere at an effective temperature of 4,328 K. [4]
A magnitude 10.32 visual companion was reported by J. Glaisher in 1842. As of 2015, it was located at an angular separation of 224.90 arcseconds along a position angle of 315°. [11]
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)". [10]
In 2012, a long-period, wide-orbiting exoplanet 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 | — | — |
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cite book}}
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ignored (
help)