Observation data Epoch J2000 Equinox | |
---|---|
Constellation | Pisces |
Right ascension | 00 15 50.80778 |
Declination | 01° 12′ 01.5868″ |
Apparent magnitude (V) | 11.26 |
Characteristics | |
Evolutionary stage | main sequence star |
Spectral type | G0V |
B−V color index | -0.2 |
J−H color index | 0.005 |
J−K color index | 0.342 |
Astrometry | |
Radial velocity (Rv) | 18.41±0.83 km/s |
Proper motion (μ) | RA: 1.896±0.09 mas/yr Dec.: 16.589±0.062 mas/yr |
Parallax (π) | 3.5949 ± 0.0431 mas |
Distance | 910 ± 10 ly (278 ± 3 pc) |
Details | |
Mass | 1.10±0.03 M☉ |
Radius | 1.11±0.05 R☉ |
Luminosity | 1.5 L☉ |
Surface gravity (log g) | 4.39±0.03 cgs |
Temperature | 6100±100 K |
Metallicity | −0.13±0.10 dex |
Rotational velocity (v sin i) | 4.8±0.8 km/s |
Other designations | |
Parumleo, Gaia DR2 2546413408888429696, TYC 2-1155-1, 2MASS J00155080+0112016 | |
Database references | |
SIMBAD | data |
WASP-32 (also known as TYC 2-1155-1) is a yellow main-sequence star in the constellation of Pisces. The star was given the formal name Parumleo in January 2020, Latin for small lion and referencing the national animal of Singapore.
Star characteristics
The WASP-32 star is relatively depleted of lithium, which is common for massive stars hosting hot Jupiter planets.
Planetary system
The "hot Jupiter" class planet WASP-32 b, later named Viculus, was discovered around WASP-32 in 2010. It was found to orbit the parent star in prograde direction in 2014.
The follow-up study utilizing transit timing variation analysis, have failed to find any, therefore have excluded existence of other massive planets around WASP-32 as in 2015.
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b (Viculus) | 3.6±0.07 MJ | 0.0394±0.0003 | 2.71865±0.00008 | 0.018±0.0065 | 85.3±0.5° | 1.18±0.07 RJ |
References
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
- Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
- "WASP-32". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-05-09.
- ^ Maxted, P. F. L.; Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Hellier, C.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; West, R. G.; Enoch, R.; Lister, T. A.; Pepe, F.; Pollacco, D. L.; Ségransan, D.; Skillen, I.; Udry, S. (2010). "WASP-32b: A Transiting Hot Jupiter Planet Orbiting a Lithium-Poor, Solar-Type Star". Publications of the Astronomical Society of the Pacific. 122 (898): 1465–1470. arXiv:1010.1742. Bibcode:2010PASP..122.1465M. doi:10.1086/657658. S2CID 55625415.
- A star and its orbiting planet now bear names with Singapore connection
- Brothwell, R. D.; Watson, C. A.; Hébrard, G.; Triaud, A. H. M. J.; Cegla, H. M.; Santerne, A.; Hébrard, E.; Anderson, D. R.; Pollacco, D.; Simpson, E. K.; Bouchy, F.; Brown, D. J. A.; Chew, Y. Gómez Maqueo; Cameron, A. Collier; Armstrong, D. J.; Barros, S. C. C.; Bento, J.; Bochinski, J.; Burwitz, V.; Busuttil, R.; Delrez, L.; Doyle, A. P.; Faedi, F.; Fumel, A.; Gillon, M.; Haswell, C. A.; Hellier, C.; Jehin, E.; Kolb, U.; et al. (2014). "A window on exoplanet dynamical histories: Rossiter–Mc Laughlin observations of WASP-13b and WASP-32b". Monthly Notices of the Royal Astronomical Society. 440 (4): 3392–3401. arXiv:1403.4095. Bibcode:2014MNRAS.440.3392B. doi:10.1093/mnras/stu520. S2CID 118435056.
- Lei-Lei Sun, Sheng-Hong Gu, Xiao-Bin Wang at al., "Long-term transit timing monitoring and homogenous study of WASP-32", 2015
- Planet WASP-32 b