Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Canis Major |
Right ascension | 06h 37m 47.61811s [1] |
Declination | −32° 20′ 23.0405″ [1] |
Apparent magnitude (V) | +5.25 [2] |
Characteristics | |
Evolutionary stage | giant [3] |
Spectral type | K1 III [4] |
B−V color index | +1.177±0.002 [2] |
Astrometry | |
Radial velocity (Rv) | 79.64±0.13 [1] km/s |
Proper motion (μ) |
RA: 107.755±0.053
mas/
yr
[1] Dec.: 65.122±0.059 mas/ yr [1] |
Parallax (π) | 7.9902 ± 0.0535 mas [1] |
Distance | 408 ± 3
ly (125.2 ± 0.8 pc) |
Absolute magnitude (MV) | −0.17±0.15 [5] |
Details [5] | |
Mass | 0.94±0.06 M☉ |
Radius | 23.08+0.68 −0.81 [6] R☉ |
Luminosity | 177.2±2.3 [6] L☉ |
Surface gravity (log g) | 1.72±0.08 cgs |
Temperature | 4,384+79 −64 [6] K |
Metallicity [Fe/H] | −0.68 dex |
Rotation | 625 days [7] |
Rotational velocity (v sin i) | 1.93±0.50 [3] km/s |
Age | 9.33±1.88 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 47536 is a single [9] star in the southern constellation of Canis Major. It has an orange hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.25. [2] The star is located at a distance of approximately 408 light years from the Sun based on parallax. It is drifting further away with a radial velocity of 80 km/s. [1]
This is an aging, metal-poor giant star with a stellar classification of K1 III. [4] It is about 9.3 billion years old with 94% of the mass of the Sun. Having exhausted the supply of hydrogen at its core, the star cooled and expanded to 23 times the Sun's radius. [6] The star is spinning slowly, taking 1.71 years to complete its sidereal rotation. It is radiating 177 [6] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,384 K. [6] As of 2015, at least one planet is known to orbit this star. [10]
A planetary companion to this star, HD 47536 b, was discovered in 2003 by a team led by J. Setiawan. [11] [3] A second planet, HD 47536 c, was claimed in 2007. [12] However, a follow-up study by Soto et al. in 2015 failed to detect the signal of the second planet, so it remains unconfirmed. [10]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | ≥4.0±0.4 MJ | 1.12±0.005 | 434.9±2.6 | 0.3±0.1 | — | — |
c (unconfirmed) | >6.98 MJ | 3.72 | 2500 | — | — | — |
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Canis Major |
Right ascension | 06h 37m 47.61811s [1] |
Declination | −32° 20′ 23.0405″ [1] |
Apparent magnitude (V) | +5.25 [2] |
Characteristics | |
Evolutionary stage | giant [3] |
Spectral type | K1 III [4] |
B−V color index | +1.177±0.002 [2] |
Astrometry | |
Radial velocity (Rv) | 79.64±0.13 [1] km/s |
Proper motion (μ) |
RA: 107.755±0.053
mas/
yr
[1] Dec.: 65.122±0.059 mas/ yr [1] |
Parallax (π) | 7.9902 ± 0.0535 mas [1] |
Distance | 408 ± 3
ly (125.2 ± 0.8 pc) |
Absolute magnitude (MV) | −0.17±0.15 [5] |
Details [5] | |
Mass | 0.94±0.06 M☉ |
Radius | 23.08+0.68 −0.81 [6] R☉ |
Luminosity | 177.2±2.3 [6] L☉ |
Surface gravity (log g) | 1.72±0.08 cgs |
Temperature | 4,384+79 −64 [6] K |
Metallicity [Fe/H] | −0.68 dex |
Rotation | 625 days [7] |
Rotational velocity (v sin i) | 1.93±0.50 [3] km/s |
Age | 9.33±1.88 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 47536 is a single [9] star in the southern constellation of Canis Major. It has an orange hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.25. [2] The star is located at a distance of approximately 408 light years from the Sun based on parallax. It is drifting further away with a radial velocity of 80 km/s. [1]
This is an aging, metal-poor giant star with a stellar classification of K1 III. [4] It is about 9.3 billion years old with 94% of the mass of the Sun. Having exhausted the supply of hydrogen at its core, the star cooled and expanded to 23 times the Sun's radius. [6] The star is spinning slowly, taking 1.71 years to complete its sidereal rotation. It is radiating 177 [6] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,384 K. [6] As of 2015, at least one planet is known to orbit this star. [10]
A planetary companion to this star, HD 47536 b, was discovered in 2003 by a team led by J. Setiawan. [11] [3] A second planet, HD 47536 c, was claimed in 2007. [12] However, a follow-up study by Soto et al. in 2015 failed to detect the signal of the second planet, so it remains unconfirmed. [10]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | ≥4.0±0.4 MJ | 1.12±0.005 | 434.9±2.6 | 0.3±0.1 | — | — |
c (unconfirmed) | >6.98 MJ | 3.72 | 2500 | — | — | — |