Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Auriga [1] |
Right ascension | 06h 30m 32.7966s [2] |
Declination | +29° 40′ 20.264″ [2] |
Apparent magnitude (V) | 11.560±0.068 [3] |
Characteristics | |
Spectral type | G0V or F[ citation needed] |
Apparent magnitude (B) | 12.138±0.019 [3] |
Apparent magnitude (R) | ~11.6 [4] |
Apparent magnitude (J) | 10.477±0.021 [5] |
Apparent magnitude (H) | 10.228±0.022 [5] |
Apparent magnitude (K) | 10.188±0.020 [5] |
Astrometry | |
Proper motion (μ) |
RA: −1.519(19)
mas/
yr
[2] Dec.: −6.761(15) mas/ yr [2] |
Parallax (π) | 2.4213 ± 0.0166 mas [2] |
Distance | 1,347 ± 9
ly (413 ± 3 pc) |
Details | |
Mass | 1.434+0.11 −0.09 [6] M☉ |
Radius | 1.657+0.046 −0.044 [6] R☉ |
Luminosity | 4.05+0.54 −0.53 [6] L☉ |
Temperature | 6360+130 −140 [6] K |
Metallicity | +0.33+0.14 −0.17 [6] |
Other designations | |
Database references | |
SIMBAD | data |
WASP-12 is a magnitude 11 yellow dwarf star located approximately 1347 light-years away [2] in the constellation Auriga. [4] WASP-12 has a mass and radius similar to the Sun and is known for being orbited by a planet that is extremely hot and has a retrograde orbit around WASP-12. WASP-12 forms a triple star system with two red dwarf companions. Both of them have spectral types of M3V and are only 38% and 37% as massive as the Sun, respectively. [7]
In 2008, the extrasolar planet WASP-12b was discovered orbiting WASP-12 by the transit method. [8] Its high carbon-to-oxygen ratio indicates that rocky planets might have formed in the star system, and it may be a carbon planet. [9] It is subject to intensive photo-evaporation, and may be completely destroyed within one billion years from now. [10]
In 2015, no indications of additional planets were found in the WASP-12 system. [6]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 1.41±0.1 MJ | 0.0229±0.0008 | 1.091423±0.000003 | 0.049±0.015 | 86.0±3.0 [11] ° | 1.736±0.092 [11] RJ |
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Auriga [1] |
Right ascension | 06h 30m 32.7966s [2] |
Declination | +29° 40′ 20.264″ [2] |
Apparent magnitude (V) | 11.560±0.068 [3] |
Characteristics | |
Spectral type | G0V or F[ citation needed] |
Apparent magnitude (B) | 12.138±0.019 [3] |
Apparent magnitude (R) | ~11.6 [4] |
Apparent magnitude (J) | 10.477±0.021 [5] |
Apparent magnitude (H) | 10.228±0.022 [5] |
Apparent magnitude (K) | 10.188±0.020 [5] |
Astrometry | |
Proper motion (μ) |
RA: −1.519(19)
mas/
yr
[2] Dec.: −6.761(15) mas/ yr [2] |
Parallax (π) | 2.4213 ± 0.0166 mas [2] |
Distance | 1,347 ± 9
ly (413 ± 3 pc) |
Details | |
Mass | 1.434+0.11 −0.09 [6] M☉ |
Radius | 1.657+0.046 −0.044 [6] R☉ |
Luminosity | 4.05+0.54 −0.53 [6] L☉ |
Temperature | 6360+130 −140 [6] K |
Metallicity | +0.33+0.14 −0.17 [6] |
Other designations | |
Database references | |
SIMBAD | data |
WASP-12 is a magnitude 11 yellow dwarf star located approximately 1347 light-years away [2] in the constellation Auriga. [4] WASP-12 has a mass and radius similar to the Sun and is known for being orbited by a planet that is extremely hot and has a retrograde orbit around WASP-12. WASP-12 forms a triple star system with two red dwarf companions. Both of them have spectral types of M3V and are only 38% and 37% as massive as the Sun, respectively. [7]
In 2008, the extrasolar planet WASP-12b was discovered orbiting WASP-12 by the transit method. [8] Its high carbon-to-oxygen ratio indicates that rocky planets might have formed in the star system, and it may be a carbon planet. [9] It is subject to intensive photo-evaporation, and may be completely destroyed within one billion years from now. [10]
In 2015, no indications of additional planets were found in the WASP-12 system. [6]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 1.41±0.1 MJ | 0.0229±0.0008 | 1.091423±0.000003 | 0.049±0.015 | 86.0±3.0 [11] ° | 1.736±0.092 [11] RJ |