HAT-P-65

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HAT-P-65
Observation data
Epoch J2000      Equinox J2000
Constellation Equuleus
Right ascension 21h 03m 37.31s[1]
Declination +11° 59′ 21.82″[1]
Apparent magnitude (V) 13.16±0.02[2]
Characteristics
Spectral type G2IV[3]
B−V color index +0.65[2]
Astrometry
Radial velocity (Rv)−47.77±0.10[3] km/s
Proper motion (μ) RA: +4.218±0.056[1] mas/yr
Dec.: −6.154±0.054[1] mas/yr
Parallax (π)1.3261 ± 0.0353[1] mas
Distance2,460 ± 70 ly
(750 ± 20 pc)
Details[3]
Mass1.21±0.05 M☉
Radius1.86±0.10 R☉
Luminosity2.71±0.14[1] L☉
Surface gravity (log g)4.03+0.08
−0.07[4] cgs
Temperature5916+107
−138[4] K
Metallicity [Fe/H]0.10±0.08 dex
Rotational velocity (v sin i)7.1±0.5 km/s
Age5.46±0.61 Gyr
Other designations
Gaia DR2 1757302881526250496, GSC 01111-00383
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

HAT-P-65 is a faint star located in the equatorial constellation Equuleus. With an apparent magnitude of 13.16, it requires a telescope to be seen. The star is located 2,460 light-years (750 pc) away from Earth, but is drifting close with a radial velocity of -48 km/s.

Properties[]

HAT-P-65 has a similar spectral type to that of the Sun. However, it is 21% more massive, and 86% larger than the latter. HAT-P-65 is slightly hotter, with an effective temperature of 5,916 K compared to 5,778 K of the Sun. It also has a higher luminosity and metallicity, with an iron content 26% greater than the Sun.

Planetary system[]

In 2016, an inflated hot Jupiter was discovered orbiting the star in a tight 2 day orbit. As of 2019, the planet has been suffering orbital decay due to its proximity.[5]

The HAT-P-65 planetary system[3]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
0.53±0.09 MJ 0.04±0.00 2.61±0.00 <0.304 84.2±1.3° 1.89±0.13 RJ

References[]

  1. ^ a b c d e 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.
  2. ^ a b Zacharias, N.; Finch, C. T.; Girard, T. M.; Henden, A.; Bartlett, J. L.; Monet, D. G.; Zacharias, M. I. (1 February 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. ISSN 0004-6256. S2CID 119299381.
  3. ^ a b c d Hartman, J. D.; Bakos, G. Á.; Bhatti, W.; Penev, K.; Bieryla, A.; Latham, D. W.; Kovács, G.; Torres, G.; Csubry, Z.; de Val-Borro, M.; Buchhave, L.; Kovács, T.; Quinn, S.; Howard, A. W.; Isaacson, H.; Fulton, B. J.; Everett, M. E.; Esquerdo, G.; Béky, B.; Szklenar, T.; Falco, E.; Santerne, A.; Boisse, I.; Hébrard, G.; Burrows, A.; Lázár, J.; Papp, I.; Sári, P. (1 December 2016). "HAT-P-65b and HAT-P-66b: Two Transiting Inflated Hot Jupiters and Observational Evidence for the Reinflation of Close-in Giant Planets". The Astronomical Journal. 152 (6): 182. Bibcode:2016AJ....152..182H. doi:10.3847/0004-6256/152/6/182. ISSN 0004-6256. S2CID 118546031.
  4. ^ a b Stassun, Keivan G.; Oelkers, Ryan J.; Paegert, Martin; Torres, Guillermo; Pepper, Joshua; De Lee, Nathan; Collins, Kevin; Latham, David W.; Muirhead, Philip S.; Chittidi, Jay; Rojas-Ayala, Bárbara; Fleming, Scott W.; Rose, Mark E.; Tenenbaum, Peter; Ting, Eric B.; Kane, Stephen R.; Barclay, Thomas; Bean, Jacob L.; Brassuer, C. E.; Charbonneau, David; Ge, Jian; Lissauer, Jack J.; Mann, Andrew W.; McLean, Brian; Mullally, Susan; Narita, Norio; Plavchan, Peter; Ricker, George R.; Sasselov, Dimitar; Seager, S.; Sharma, Sanjib; Shiao, Bernie; Sozzetti, Alessandro; Stello, Dennis; Vanderspek, Roland; Wallace, Geoff; Winn, Joshua N. (1 October 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. hdl:1721.1/124721. ISSN 0004-6256. S2CID 166227927.
  5. ^ Alvarado-Montes, Jaime A; García-Carmona, Carolina (2019-07-01). "Orbital decay of short-period gas giants under evolving tides". Monthly Notices of the Royal Astronomical Society. 486 (3): 3963–3974. arXiv:1904.07596. doi:10.1093/mnras/stz1081. ISSN 0035-8711.
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