HAT-P-9

HAT-P-9 / Tevel

Observation data Epoch J2000      Equinox J2000
Constellation	Auriga
Right ascension	07^h 20^m 40.4565^s[1]
Declination	+37° 08′ 26.343″[1]
Apparent magnitude (V)	12.34 ± 0.27[2]
Characteristics
Spectral type	F[3]
Apparent magnitude (B)	12.35 ± 0.23[2]
Apparent magnitude (V)	12.34 ± 0.27[2]
Apparent magnitude (J)	11.274 ± 0.022[2]
Apparent magnitude (H)	11.04 ± 0.03[2]
Apparent magnitude (K)	11.015 ± 0.021[2]
Variable type	planetary transit[3]
Astrometry
Proper motion (μ)	RA: −9.796(16) mas/yr[1] Dec.: −13.029(14) mas/yr[1]
Parallax (π)	2.1626 ± 0.0140 mas[1]
Distance	1,508 ± 10 ly (462 ± 3 pc)
Details
Mass	1.28 ± 0.13[3] M☉
Radius	1.32 ± 0.07[3] R☉
Surface gravity (log g)	4.29 ± 0.03[4] cgs
Temperature	6253 ± 84[4] K
Metallicity [Fe/H]	0.16 ± 0.09[4] dex
Rotational velocity (v sin i)	13.4 ± 1.4[4] km/s
Age	1.6 ^+1.8 −1.4 Gyr
Equatorial [ g ]	201,21 m/s^2
Other designations
Tevel, Gaia DR3 898130030131443584, TYC 2463-281-1, GSC 02463-00281, 2MASS J07204044+3708263[2]
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)

HAT-P-9 is a magnitude 12 F star approximately 1500 light years away in the constellation Auriga.^[2] A search for a binary companion star using adaptive optics at the MMT Observatory was negative.^[5]

The star HAT-P-9 is named Tevel. The name was selected in the NameExoWorlds campaign by Israel, during the 100th anniversary of the IAU. The Hebrew word תֵבֵל tevel means "World" or "Universe".^[6][7]

Planetary system

An exoplanet orbiting the star, HAT-P-9b, was discovered by the transit method on June 26, 2008.^[3]

The HAT-P-9 planetary system

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b / Alef	0.78 ± 0.09 MJ	0.053 ± 0.002	3.92289 ± 4e-05	0	—	—

See also

• HATNet Project or HAT
• List of extrasolar planets

References

1. 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.
2. "SIMBAD query result: TYC 2463-281-1 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-18.
3. Shporer, Avi; et al. (2009). "HAT-P-9b: A Low-Density Planet Transiting a Moderately Faint F Star". The Astrophysical Journal. 690 (2): 1393–1400. arXiv:0806.4008. Bibcode:2009ApJ...690.1393S. doi:10.1088/0004-637X/690/2/1393. S2CID 930937.
4. 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. S2CID 16580774.
5. Adams, E. R.; et al. (2013). "Adaptive Optics Images. II. 12 Kepler Objects of Interest and 15 Confirmed Transiting Planets". The Astronomical Journal. 146 (1). 9. arXiv:1305.6548. Bibcode:2013AJ....146....9A. doi:10.1088/0004-6256/146/1/9. S2CID 119117620.
6. "Approved names". NameExoworlds. Retrieved 2020-01-02.
7. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.

External links

• Image HAT-P-9
• "HAT-P-9". Exoplanets. Archived from the original on 2016-03-03. Retrieved 2009-05-18.