HAT-P-23

HAT-P-23 / Moriah
Observation data
Epoch J2000      Equinox J2000
Constellation Delphinus
Right ascension 20h 24m 29.7235s[1]
Declination +16° 45′ 43.812″[1]
Apparent magnitude (V) 11.94[2]
Characteristics
Spectral type G0V
Apparent magnitude (J) 11.103±0.022[3]
Apparent magnitude (H) 10.846±0.022[3]
Apparent magnitude (K) 10.791±0.020[3]
Variable type Planetary transit[4]
Astrometry
Radial velocity (Rv)-14.324 km/s
Proper motion (μ) RA: 13.325(11) mas/yr[1]
Dec.: −5.505(11) mas/yr[1]
Parallax (π)2.7358 ± 0.0108 mas[1]
Distance1,192 ± 5 ly
(366 ± 1 pc)
Details[4]
Mass1.13±0.035 M☉
Radius1.203±0.074 R☉
Luminosity1.58±0.23 L☉
Surface gravity (log g)4.33±0.05 cgs
Temperature5905±80 K
Metallicity0.15±0.04
Rotation7.015 d[5]
Rotational velocity (v sin i)8.1±0.5 km/s
Age4.0±1.0 Gyr
Other designations
Moriah, Gaia DR2 1808938730710633984, TYC 1632-1396-1, GSC 01632-01396, 2MASS J20242972+1645437[2]
Database references
SIMBADdata

HAT-P-23 is a G-type main-sequence star 1192 light-years away. It has a rapid rotation (rotation period equal to 7 days) for its advanced age of 4 billion years, and exhibits a strong starspot activity.[6] The star may be in the process of being spun up by the giant planet on close orbit.[7] The star is enriched in heavy elements, having about 140% amount of metals compared to solar abundance.

  1. ^ a b c d Cite error: The named reference Gaia DR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference simbad was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Skrutskie2006 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Bakos2010 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Salisbury2021 was invoked but never defined (see the help page).
  6. ^ Schrijver, Carolus J. (2020), "Testing the solar activity paradigm in the context of exoplanet transits", The Astrophysical Journal, 890 (2): 121, arXiv:2001.01093, Bibcode:2020ApJ...890..121S, doi:10.3847/1538-4357/ab67c1, S2CID 209862471
  7. ^ Maciejewski, G.; Fernández, M.; Aceituno, F.; Martín-Ruiz, S.; Ohlert, J.; Dimitrov, D.; Szyszka, K.; von Essen, C.; Mugrauer, M.; Bischoff, R.; Michel, K. -U.; Mallonn, M.; Stangret, M.; Moździerski, D. (2018), "Planet-star interactions with precise transit timing. I. The refined orbital decay rate for WASP-12 b and initial constraints for HAT-P-23 b, KELT-1 b, KELT-16 b, WASP-33 b, and WASP-103 b", Acta Astronomica, 68 (4): 371, arXiv:1812.02438, Bibcode:2018AcA....68..371M, doi:10.32023/0001-5237/68.4.4, S2CID 118895482