ADS 16402

ADS 16402
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Lacerta[1]
ADS 16402 A
Right ascension 22h 57m 45.919s[2]
Declination +38° 40′ 27.19″[2]
Apparent magnitude (V) +10.0[3]
ADS 16402 B (HAT-P-1)
Right ascension 22h 57m 46.844s[2]
Declination +38° 40′ 30.33″[2]
Apparent magnitude (V) +10.4[3]
Characteristics
ADS 16402 A
Spectral type F8[3]/G0V[4]
ADS 16402 B (HAT-P-1)
Spectral type F8[3]/G0V[4]
Astrometry
ADS 16402 A
Radial velocity (Rv)-3.43 ± 0.32[4] km/s
Proper motion (μ) RA: 29.9 ± 0.6[2] mas/yr
Dec.: -42.5 ± 1.2[2] mas/yr
Distance450+72
−62 ly
(139 +22
−19[4] pc)
Absolute magnitude (MV)3.4 ± 0.3[4]
ADS 16402 B (HAT-P-1)
Radial velocity (Rv)-2.94 ± 0.56[4] km/s
Proper motion (μ) RA: 32.7 ± 0.8[2] mas/yr
Dec.: -43.2 ± 1.9[2] mas/yr
Distance450+72
−62 ly
(139 +22
−19[4] pc)
Absolute magnitude (MV)3.7 ± 0.3[4]
Details
ADS 16402 A
Mass1.16 ± 0.11[4] M☉
Radius1.123 +0.14
−0.10[4] R☉
Luminosity1.82 +0.75
−0.53[4] L☉
Surface gravity (log g)4.13 ± 0.10[4] cgs
Temperature6047 ± 56[4] K
Metallicity [Fe/H]+0.12 ± 0.05[4] dex
Rotational velocity (v sin i)7.1 ± 0.3[4] km/s
Age3.6 [4] Gyr
ADS 16402 B (HAT-P-1)
Mass1.151 +0.052
−0.051[5] M☉
Radius1.174 +0.026
−0.027[5] R☉
Luminosity1.585 +0.099
−0.094[5] L☉
Surface gravity (log g)4.359 ± 0.014[5] cgs
Temperature5980 ± 49[5] K
Metallicity [Fe/H]0.130 ± 0.08[5] dex
Rotational velocity (v sin i)2.2 ± 0.2[4] km/s
Age3.6 [4] Gyr
Other designations
HJ 1832, CCDM J22578+3840, WDS J22578+3840
ADS 16402 A: BD+37 4734p, PPM 88381
ADS 16402 B: HAT-P-1, BD+37 4734s, PPM 88382
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia		data

ADS 16402 is a binary star system, composed of two sun-like stars located 450 light-years away in the constellation Lacerta. It was first identified by John Herschel in 1831.[4] The two stars are separated by 1500 AUs. The star system is estimated to be 3.6 billion years old.[3] The secondary star ADS 16402 B is also designated HAT-P-1.

Planetary system

In 2006 the HATNet Project announced the discovery of a hot jupiter type gas giant extrasolar planet in orbit around the secondary star. Following the designation scheme used by the HATNet Project, the secondary star is known as HAT-P-1, and the planet itself designated HAT-P-1b.[4]

The HAT-P-1 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 0.524 ± 0.031 MJ 0.0553 ± 0.0014 4.4652934 ± 0.000093 <0.067 — —

See also

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. 1 2 3 4 5 6 7 8 Zacharias, N.; et al. (2013). "The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)". The Astronomical Journal 145 (2). 44. arXiv:1212.6182. Bibcode:2013AJ....145...44Z. doi:10.1088/0004-6256/145/2/44.Vizier catalog entry for ADS 16402A Vizier catalog entry for ADS 16402B
  3. 1 2 3 4 5 "SIMBAD query result: ADS16402". Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-10.
  4. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Bakos, G. Á.; et al. (2007). "HAT-P-1b: A Large-Radius, Low-Density Exoplanet Transiting One Member of a Stellar Binary". The Astrophysical Journal 656 (1): 552–559. arXiv:astro-ph/0609369. Bibcode:2007ApJ...656..552B. doi:10.1086/509874.
  5. 1 2 3 4 5 6 Nikolov, N.; et al. (2013). "Hubble Space Telescope hot Jupiter transmission spectral survey: a detection of Na and strong optical absorption in HAT-P-1b". Monthly Notices of the Royal Astronomical Society. arXiv:1310.0083. Bibcode:2014MNRAS.437...46N. doi:10.1093/mnras/stt1859.

External links

Coordinates: 22h 57m 47s, +38° 40′ 30″

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