WASP-32
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pisces[1] |
| Right ascension | 00h 15m 50.80773s[2] |
| Declination | +01° 12′ 01.5889″[2] |
| Apparent magnitude (V) | 11.26[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4] |
| Spectral type | mid-F[4] |
| B−V color index | -0.2[citation needed] |
| J−H color index | 0.005[citation needed] |
| J−K color index | 0.342[citation needed] |
| Astrometry | |
| Radial velocity (Rv) | 18.27±0.32[2] km/s |
| Proper motion (μ) | RA: 1.951 mas/yr[2] Dec.: 16.447 mas/yr[2] |
| Parallax (π) | 3.5706±0.0373 mas[2] |
| Distance | 913 ± 10 ly (280 ± 3 pc) |
| Details[5] | |
| Mass | 1.10±0.03[4] M☉ |
| Radius | 1.09±0.03 R☉ |
| Luminosity | 1.6[2] L☉ |
| Surface gravity (log g) | 4.39±0.03[4] cgs |
| Temperature | 6140+90 −100 K |
| Metallicity [Fe/H] | −0.13±0.10 dex |
| Rotation | 11.6±1.0 d |
| Rotational velocity (v sin i) | 3.9+0.4 −0.5 km/s |
| Age | 2.22+0.62 −0.73 Gyr |
| Other designations | |
| Parumleo, TOI-4523, TIC 427332229, WASP-32, TYC 2-1155-1, 2MASS J00155080+0112016[6] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
WASP-32, also named Parumleo, is an F-type main-sequence star about 913 light-years away in the constellation of Pisces.
Nomenclature
[edit | edit source]The designation WASP-32 comes from the Wide Angle Search for Planets.
This was one of the systems selected to be named in the 2019 NameExoWorlds campaign during the 100th anniversary of the IAU, which assigned each country a star and planet to be named. This system was assigned to Singapore. The star was given the formal name Parumleo in January 2020, Latin for small lion and referencing the national animal of Singapore, and the planet was named Viculus, Latin for little village.[7][8]
Stellar characteristics
[edit | edit source]The WASP-32 star is relatively depleted of lithium, which is common for massive stars hosting hot Jupiter planets.[4]
Planetary system
[edit | edit source]The hot Jupiter class planet WASP-32b, later named Viculus, was discovered around WASP-32 in 2010.[4] It was found to orbit the parent star in a prograde direction in 2014.[9]
A follow-up study utilizing transit-timing variation analysis failed to find any such variation, so there is no evidence of other massive planets around WASP-32 as of 2015.[10]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (Viculus) | 3.49+0.12 −0.11 MJ |
0.03904+0.00062 −0.00061 |
2.7186591(24) | <0.004 | 85.1±0.2° | 1.10±0.04 RJ |
References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Constellation record for this object at VizieR.
- ^ a b c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR3 record for this source at VizieR.
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ A star and its orbiting planet now bear names with Singapore connection
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
