WASP-19

WASP-19 is a magnitude 12.3 star located in the Vela constellation of the southern hemisphere.[7] This star has been found to host a transiting hot Jupiter-type planet in tight orbit.

WASP-19

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Vela[1]
Right ascension	09^h 53^m 40.0765^s[2]
Declination	−45° 39′ 33.056″[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
Proper motion (μ)	RA: −35.407±0.041[2] mas/yr Dec.: 17.288±0.040[2] mas/yr
Parallax (π)	3.6981 ± 0.0236[2] mas
Distance	882 ± 6 ly (270 ± 2 pc)
Absolute magnitude (MV)	5.3
Details
Mass	0.97±0.02[5] M☉
Radius	0.885^+0.086 −0.084 R☉
Luminosity	0.71 L☉
Surface gravity (log g)	4.45 ± 0.05[6] cgs
Temperature	5568 ± 71[6] K
Metallicity [Fe/H]	0.15 ± 0.07[6] dex
Rotation	10.5 ± 0.2 days[7]
Rotational velocity (v sin i)	4.0 ± 1.0[6] km/s
Age	600 Myr
Other designations
GSC 08181-01711, USNO-B1.0 0443-00193111, 2MASS J09534008-4539330
Database references
SIMBAD	data
Extrasolar Planets Encyclopaedia	data

Planetary system

In December 2009 SuperWASP project announced that a hot Jupiter type extrasolar planet, WASP-19b, was orbiting very close to this star and with the shortest orbital period so far detected.[7]

The WASP-19 planetary system[8][5]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	1.168±0.023 MJ	0.01634 ± 0.00019	0.7888396 ± 0.00000010	0	78.76 ± 0.13°	1.18±0.12 RJ

See also

• List of extrasolar planets

References

1. Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Vizier query form
2. 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. Gaia DR2 record for this source at VizieR.
3. Maxted, P. F. L.; et al. (2011). "UBV(RI)C photometry of transiting planet hosting stars". Monthly Notices of the Royal Astronomical Society. 418 (2): 1039–1042. arXiv:1108.0349. Bibcode:2011MNRAS.418.1039M. doi:10.1111/j.1365-2966.2011.19554.x.
4. Skrutskie, M. F.; et al. (2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708.Vizier catalog entry
5. Dragomir, Diana; Kane, Stephen R.; Pilyavsky, Genady; Mahadevan, Suvrath; Ciardi, David R.; Zachary Gazak, J.; Gelino, Dawn M.; Payne, Alan; Rabus, Markus; Ramirez, Solange V.; von Braun, Kaspar; Wright, Jason T.; Wyatt, Pamela (2011). "Terms Photometry of Known Transiting Exoplanets". The Astronomical Journal. 142 (4): 115. arXiv:1108.2308. Bibcode:2011AJ....142..115D. doi:10.1088/0004-6256/142/4/115.
6. Torres, Guillermo; et al. (2012). "Improved Spectroscopic Parameters for Transiting Planet Hosts". The Astrophysical Journal. 757 (2). 161. arXiv:1208.1268. Bibcode:2012ApJ...757..161T. doi:10.1088/0004-637X/757/2/161.
7. Hebb, L.; et al. (2010). "WASP-19b: The Shortest Period Transiting Exoplanet Yet Discovered". The Astrophysical Journal. 708 (1): 224–231. arXiv:1001.0403. Bibcode:2010ApJ...708..224H. doi:10.1088/0004-637X/708/1/224.
8. Mancini, L.; et al. (2013). "Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry". Monthly Notices of the Royal Astronomical Society. 436 (1): 2–18. arXiv:1306.6384. Bibcode:2013MNRAS.436....2M. doi:10.1093/mnras/stt1394.