Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Vela [1] |
Right ascension | 09h 53m 40.07656s [2] |
Declination | −45° 39′ 33.0572″ [2] |
Apparent magnitude (V) | 12.312 ± 0.017 [3] |
Characteristics | |
Spectral type | G8V |
Apparent magnitude (B) | 13.58 |
Apparent magnitude (R) | 12.17 |
Apparent magnitude (I) | 11.35 |
Apparent magnitude (J) | 10.911 ± 0.026 [4] |
Apparent magnitude (H) | 10.602 ± 0.022 [4] |
Apparent magnitude (K) | 10.481 ± 0.023 [4] |
B−V color index | 1.3 |
V−R color index | 0.1 |
R−I color index | 0.82 |
Variable type | planetary transit |
Astrometry | |
Radial velocity (Rv) | 21.41±0.95 [2] km/s |
Proper motion (μ) |
RA: −35.457
mas/
yr
[2] Dec.: 17.378 mas/ yr [2] |
Parallax (π) | 3.7516 ± 0.0090 mas [2] |
Distance | 869 ± 2
ly (266.6 ± 0.6 pc) |
Absolute magnitude (MV) | 5.3 |
Details [5] | |
Mass | 0.97±0.02 [6] M☉ |
Radius | 0.885+0.086 −0.084 R☉ |
Luminosity | 0.71 L☉ |
Surface gravity (log g) | 4.45 ± 0.05 [7] cgs |
Temperature | 5568 ± 71 [7] K |
Metallicity [Fe/H] | 0.15 ± 0.07 [7] dex |
Rotation | 11.76±0.09 d |
Rotational velocity (v sin i) | 4.0 ± 1.0 [7] km/s |
Age | 9.95±2.49 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
WASP-19, formally named Wattle, [8] is a magnitude 12.3 star about 869 light-years (266 parsecs) away, located in the Vela constellation of the southern hemisphere. [9] This star has been found to host a transiting hot Jupiter-type planet in tight orbit.
WASP-19 is older than the Sun, has a fraction of heavy elements above the solar abundance, and is rotating rapidly, being spun up by the tides raised by the giant planet on a close orbit. [5]
The designation WASP-19 indicates that this was the 19th star found to have a planet by the Wide Angle Search for Planets.
In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project. [10] The approved names were proposed by a team from Brandon Park Primary School in Wheelers Hill ( Melbourne, Australia), led by scientist Lance Kelly and teacher David Maierhofer [11] and announced in June 2023. WASP-19 is named "Wattle" and its planet is named "Banksia", after the plant genera Wattle (specifically the golden wattle Acacia pycnantha) and Banksia (specifically the scarlet banksia Banksia coccinea) respectively. [8]
In December 2009, the SuperWASP project announced that a hot Jupiter type exoplanet, WASP-19b, was orbiting very close to this star and with the shortest orbital period of any transiting exoplanet known at the time. [9]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b / Banksia | 1.168±0.023 MJ | 0.01634 ± 0.00019 | 0.7888396 ± 0.00000010 | 0 | 78.76 ± 0.13 ° | 1.18±0.12 RJ |
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Vela [1] |
Right ascension | 09h 53m 40.07656s [2] |
Declination | −45° 39′ 33.0572″ [2] |
Apparent magnitude (V) | 12.312 ± 0.017 [3] |
Characteristics | |
Spectral type | G8V |
Apparent magnitude (B) | 13.58 |
Apparent magnitude (R) | 12.17 |
Apparent magnitude (I) | 11.35 |
Apparent magnitude (J) | 10.911 ± 0.026 [4] |
Apparent magnitude (H) | 10.602 ± 0.022 [4] |
Apparent magnitude (K) | 10.481 ± 0.023 [4] |
B−V color index | 1.3 |
V−R color index | 0.1 |
R−I color index | 0.82 |
Variable type | planetary transit |
Astrometry | |
Radial velocity (Rv) | 21.41±0.95 [2] km/s |
Proper motion (μ) |
RA: −35.457
mas/
yr
[2] Dec.: 17.378 mas/ yr [2] |
Parallax (π) | 3.7516 ± 0.0090 mas [2] |
Distance | 869 ± 2
ly (266.6 ± 0.6 pc) |
Absolute magnitude (MV) | 5.3 |
Details [5] | |
Mass | 0.97±0.02 [6] M☉ |
Radius | 0.885+0.086 −0.084 R☉ |
Luminosity | 0.71 L☉ |
Surface gravity (log g) | 4.45 ± 0.05 [7] cgs |
Temperature | 5568 ± 71 [7] K |
Metallicity [Fe/H] | 0.15 ± 0.07 [7] dex |
Rotation | 11.76±0.09 d |
Rotational velocity (v sin i) | 4.0 ± 1.0 [7] km/s |
Age | 9.95±2.49 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
WASP-19, formally named Wattle, [8] is a magnitude 12.3 star about 869 light-years (266 parsecs) away, located in the Vela constellation of the southern hemisphere. [9] This star has been found to host a transiting hot Jupiter-type planet in tight orbit.
WASP-19 is older than the Sun, has a fraction of heavy elements above the solar abundance, and is rotating rapidly, being spun up by the tides raised by the giant planet on a close orbit. [5]
The designation WASP-19 indicates that this was the 19th star found to have a planet by the Wide Angle Search for Planets.
In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project. [10] The approved names were proposed by a team from Brandon Park Primary School in Wheelers Hill ( Melbourne, Australia), led by scientist Lance Kelly and teacher David Maierhofer [11] and announced in June 2023. WASP-19 is named "Wattle" and its planet is named "Banksia", after the plant genera Wattle (specifically the golden wattle Acacia pycnantha) and Banksia (specifically the scarlet banksia Banksia coccinea) respectively. [8]
In December 2009, the SuperWASP project announced that a hot Jupiter type exoplanet, WASP-19b, was orbiting very close to this star and with the shortest orbital period of any transiting exoplanet known at the time. [9]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b / Banksia | 1.168±0.023 MJ | 0.01634 ± 0.00019 | 0.7888396 ± 0.00000010 | 0 | 78.76 ± 0.13 ° | 1.18±0.12 RJ |