WASP-7

Last updated
WASP-7
Observation data
Epoch J2000       Equinox J2000
Constellation Microscopium [1]
Right ascension 20h 44m 10.2208s [2]
Declination −39° 13′ 30.856″ [2]
Apparent magnitude  (V)9.50 [3]
Characteristics
Spectral type F5V [3]
Apparent magnitude  (B)~9.96 [3]
Apparent magnitude  (V)~9.54 [3]
Apparent magnitude  (J)8.648 ± 0.027 [3]
Apparent magnitude  (H)8.414 ± 0.042 [3]
Apparent magnitude  (K)8.396 ± 0.023 [3]
Astrometry
Radial velocity (Rv)−29.09±0.20 [2] km/s
Proper motion (μ)RA: 30.394 mas/yr [2]
Dec.: −57.587 mas/yr [2]
Parallax (π)6.1902±0.0176  mas [2]
Distance 527 ± 1  ly
(161.5 ± 0.5  pc)
Details [4]
Mass 1.285±0.063  M☉
Radius 1.466±0.094  R☉
Temperature 6520±70 [5]   K
Metallicity [Fe/H]0.00±0.10  dex
Rotational velocity (v sin i)17.0±2.0 km/s
Age 2.5+0.8
−0.9  Gyr
Other designations
CD−39 13941, CPD−39 8759, HD 197286, PPM 300547, TOI-2197, TIC 389352124, WASP-7, TYC 7963-1570-1, GSC 07963-01570, 2MASS J20441022-3913309, CPC 18 10732 [3]
Database references
SIMBAD data
Exoplanet Archive data

WASP-7, also identified as HD 197286, is a type F star located about 527 light-years away in the constellation Microscopium. This star is a little larger and about 28% more massive than the Sun and is also brighter and hotter. At magnitude 9.5 the star cannot be seen by the naked eye but is visible through a small telescope. [3]

Contents

Planetary system

The SuperWASP project announced an extrasolar planet, WASP-7b, orbiting this star in 2008. The planet appears to be another hot Jupiter, a low-density planet with Jupiter's mass orbiting very close to a hot star and thus emitting enough heat to glow. [6] [7]

The WASP-7 planetary system [4]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 1.083+0.093
−0.088  MJ 		0.06188+0.00098
−0.0010		4.9546416(35)<0.04987.03±0.93 ° 1.363±0.093  RJ

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 4 5 6 7 8 9 "SIMBAD query result: HD 197286 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-06.
  4. 1 2 Bonomo, A. S.; Desidera, S.; et al. (June 2017). "The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy & Astrophysics . 602: A107. arXiv: 1704.00373 . Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882.
  5. ↑ Wallack, Nicole L.; Knutson, Heather A.; Deming, Drake (2021), "Trends in Spitzer Secondary Eclipses", The Astronomical Journal, 162 (1): 36, arXiv: 2103.15833 , Bibcode:2021AJ....162...36W, doi: 10.3847/1538-3881/abdbb2 , S2CID   232417602
  6. ↑ Hellier, Coel; Anderson, D. R.; Gillon, M.; Lister, T. A.; Maxted, P. F. L.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; et al. (2008). "Wasp-7: A Bright Transiting-Exoplanet System in the Southern Hemisphere". The Astrophysical Journal Letters. 690 (1): L89 –L91. arXiv: 0805.2600 . Bibcode:2009ApJ...690L..89H. doi:10.1088/0004-637X/690/1/L89. S2CID   15962609.
  7. ↑ Southworth, J.; Dominik, M.; et al. (March 2011). "A much lower density for the transiting extrasolar planet WASP-7". Astronomy & Astrophysics . 527: A8. arXiv: 1012.5181 . Bibcode:2011A&A...527A...8S. doi:10.1051/0004-6361/201016183.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.