Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Fornax |
Right ascension | 02h 44m 09.6098s [1] |
Declination | −30° 10′ 08.5614″ [1] |
Apparent magnitude (V) | 10.96 [1] |
Characteristics | |
Evolutionary stage | main-sequence star |
Spectral type | F7 [2] |
Apparent magnitude (B) | 11.54 [1] |
Apparent magnitude (G) | 10.8378 [1] |
Apparent magnitude (R) | 10.47 [1] |
Astrometry | |
Radial velocity (Rv) | 37.36 km/s |
Proper motion (μ) |
RA: 7.447
[3]
mas/
yr Dec.: -7.817 [3] mas/ yr |
Parallax (π) | 2.2718 ± 0.0440 mas [3] |
Distance | 1,440 ± 30
ly (440 ± 9 pc) |
Orbit [4] | |
Primary | WASP-72 |
Companion | WASP-72B |
Semi-major axis (a) | 0.639±0.003" (281 AU) |
Details [4] | |
WASP-72 | |
Mass | 1.386 M☉ |
Radius | 1.98 R☉ |
Temperature | 6250 K |
Rotational velocity (v sin i) | 6.0±2.1 [5] km/s |
Age | 3.55±0.82 Gyr |
WASP-72B | |
Mass | 0.66±0.02 M☉ |
Temperature | 4234+80 −81 K |
Other designations | |
Database references | |
SIMBAD | 1019 data |
WASP-72 (also known as CD-30 1019 and officially named Diya) is the primary of a binary star system. It is an F7 class dwarf star, with an internal structure just on the verge of the Kraft break. [5] It is orbited by a planet WASP-72b. The age of WASP-72 is younger than the Sun at 3.55±0.82 billion years. [4]
The primary seems to have UV-opaque matter in the line-of-sight, which may originate from atmosphere escaping from WASP-72b or from an unknown object in the interstellar medium. [6] WASP-72 was named Diya in 2019. [7]
A faint stellar companion WASP-72B was discovered in 2020 at a projected separation of 281 AU. It may still be a false positive, with a probability of 0.02%. [4]
The
transiting
hot Jupiter
exoplanet orbiting WASP-72 was discovered by
WASP in 2012.
[8] The planetary orbit is well aligned to the equatorial plane of the star, with misalignment equal to −7°+11°
−12°.
[5] Despite the close proximity of the planet to the parent star, orbital decay was not detected as of 2020.
[9] The planetary equilibrium temperature is 2210+120
−130
K,
[8] compatible with the measured dayside temperature of 2098+335
−364
K.
[10]
WASP-72b was named "Cuptor" in 2019 by Mauritian amateur astronomers as part of the NameExoWorlds contest. [7]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b / Cuptor | — | 0.0344±0.0046 | 2.216789+0.000041 −0.000054 |
0 | 79.9+1.6 −1.3 ° |
1.24±0.15 RJ |
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Fornax |
Right ascension | 02h 44m 09.6098s [1] |
Declination | −30° 10′ 08.5614″ [1] |
Apparent magnitude (V) | 10.96 [1] |
Characteristics | |
Evolutionary stage | main-sequence star |
Spectral type | F7 [2] |
Apparent magnitude (B) | 11.54 [1] |
Apparent magnitude (G) | 10.8378 [1] |
Apparent magnitude (R) | 10.47 [1] |
Astrometry | |
Radial velocity (Rv) | 37.36 km/s |
Proper motion (μ) |
RA: 7.447
[3]
mas/
yr Dec.: -7.817 [3] mas/ yr |
Parallax (π) | 2.2718 ± 0.0440 mas [3] |
Distance | 1,440 ± 30
ly (440 ± 9 pc) |
Orbit [4] | |
Primary | WASP-72 |
Companion | WASP-72B |
Semi-major axis (a) | 0.639±0.003" (281 AU) |
Details [4] | |
WASP-72 | |
Mass | 1.386 M☉ |
Radius | 1.98 R☉ |
Temperature | 6250 K |
Rotational velocity (v sin i) | 6.0±2.1 [5] km/s |
Age | 3.55±0.82 Gyr |
WASP-72B | |
Mass | 0.66±0.02 M☉ |
Temperature | 4234+80 −81 K |
Other designations | |
Database references | |
SIMBAD | 1019 data |
WASP-72 (also known as CD-30 1019 and officially named Diya) is the primary of a binary star system. It is an F7 class dwarf star, with an internal structure just on the verge of the Kraft break. [5] It is orbited by a planet WASP-72b. The age of WASP-72 is younger than the Sun at 3.55±0.82 billion years. [4]
The primary seems to have UV-opaque matter in the line-of-sight, which may originate from atmosphere escaping from WASP-72b or from an unknown object in the interstellar medium. [6] WASP-72 was named Diya in 2019. [7]
A faint stellar companion WASP-72B was discovered in 2020 at a projected separation of 281 AU. It may still be a false positive, with a probability of 0.02%. [4]
The
transiting
hot Jupiter
exoplanet orbiting WASP-72 was discovered by
WASP in 2012.
[8] The planetary orbit is well aligned to the equatorial plane of the star, with misalignment equal to −7°+11°
−12°.
[5] Despite the close proximity of the planet to the parent star, orbital decay was not detected as of 2020.
[9] The planetary equilibrium temperature is 2210+120
−130
K,
[8] compatible with the measured dayside temperature of 2098+335
−364
K.
[10]
WASP-72b was named "Cuptor" in 2019 by Mauritian amateur astronomers as part of the NameExoWorlds contest. [7]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b / Cuptor | — | 0.0344±0.0046 | 2.216789+0.000041 −0.000054 |
0 | 79.9+1.6 −1.3 ° |
1.24±0.15 RJ |