Wide binary star system in the constellation Boötes
HAT-P-4 Observation dataEpoch J2000 Equinox J2000 Constellation Boötes [ 1] HAT-P-4A Right ascension 15h 19m 57.9204s [ 2] Declination +36° 13′ 46.738″[ 2] Apparent magnitude (V)± 0.010[ 3] HAT-P-4B Right ascension 15h 20m 00.0127s [ 4] Declination +36° 12′ 18.520″[ 4] Apparent magnitude (V)± 0.01[ 3] Characteristics HAT-P-4A Spectral type G0V[ 5] B−Vcolor index 0.771 Variable type planetary transit [ 6] HAT-P-4B Spectral type G2V[ 5] Astrometry HAT-P-4A Radial velocity (Rv )[ 2] km/s Proper motion (μ)RA: mas /yr [ 2] Dec.: mas /yr [ 2] Parallax (π)3.1071± 0.0154 mas [ 2] Distance 1,050 ± 5 ly pc ) HAT-P-4B Radial velocity (Rv )[ 4] km/s Proper motion (μ)RA: mas /yr [ 4] Dec.: mas /yr [ 4] Parallax (π)3.0777 ± 0.0155 mas [ 4] Distance 1,060 ± 5 ly pc ) Details HAT-P-4A Mass 1.260+0.043 −0.042 [ 7] M ☉ Radius 1.573± 0.015[ 7] R ☉ Luminosity 0.41 L ☉ Surface gravity (log g )4.145± 0.015[ 7] cgs Temperature 5927+57 −47 [ 7] K Metallicity ± 0.007[ 8] dex Rotational velocity (v sin i )5.6 ± 0.9[ 9] Age ~4.2 Gyr HAT-P-4B Surface gravity (log g )± 0.14[ 8] cgs Temperature ± 37[ 8] K Metallicity ± 0.006[ 8] dex Position (relative to HAT-P-4A) [ 5] Component HAT-P-4B Epoch of observation 1999/02/07 Angular distance ± 0.099″ Position angle ± 0.06Projected separation 446 AU Other designations HAT-P-4A :BD 36°2593Gaia DR3 1291120362349158016SAO 64638TYC 2569-1599-1GSC 02569-015992MASS J15195792+3613467[ 10] HAT-P-4B :Gaia DR3 1291119606434912384TYC 2569-744-12MASS J15200001+3612185[ 11] Database references SIMBAD data Data sources: Hipparcos Catalogue ,CCDM (2002),Bright Star Catalogue (5th rev. ed.)
HAT-P-4 is a widebinary star consisting of a pair ofG-type main-sequence stars [ 5] constellation ofBoötes .[ 1] BD +36°2593
The star exhibits an infrared excess noise of unknown origin.[ 12]
The primary star is home to thetransiting extrasolar planet HAT-P-4b .[ 6] hot Jupiter type planet in a 3-day orbit.[ 6]
The companion star is located at a distance of 28446astronomical units and therefore has an orbital period that is extremely long.[ 5]
^a b 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 ^a b c d e 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 atVizieR .^a b Henden, A. A.; et al. (2016). "VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)".VizieR On-line Data Catalog: II/336. Originally Published in: 2015AAS...22533616H .2336 .Bibcode :2016yCat.2336....0H . Vizier catalog entry for component A Vizier catalog entry for component B ^a b c d e 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 atVizieR .^a b c d e Mugrauer, M.; Ginski, C.; Seeliger, M. (2014)."New wide stellar companions of exoplanet host stars" .Monthly Notices of the Royal Astronomical Society .439 (1):1063– 1070.Bibcode :2014MNRAS.439.1063M .doi :10.1093/mnras/stu044 ^a b c Kovács, G.; et al. (2007)."HAT-P-4b: A Metal-rich Low-Density Transiting Hot Jupiter" .The Astrophysical Journal Letters .670 (1):L41 – L44 .arXiv :0710.0602 Bibcode :2007ApJ...670L..41K doi :10.1086/524058 S2CID 14966730 . ^a b c d e Wang, Xian-Yu; et al. (1 July 2021)."Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves" .The Astrophysical Journal Supplement Series .255 (1). 15.arXiv :2105.14851 Bibcode :2021ApJS..255...15W .doi :10.3847/1538-4365/ac0835 S2CID 235253975 . ^a b c d Saffe, C.; et al. (2017)."Signatures of rocky planet engulfment in HAT-P-4. Implications for chemical tagging studies" .Astronomy and Astrophysics Letters .604 . L4.arXiv :1707.02180 Bibcode :2017A&A...604L...4S .doi :10.1051/0004-6361/201731430 .S2CID 119204481 . ^ 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 . ^ "BD+36 2593" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2023-02-24 .^ "TYC 2569-744-1" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2023-02-24 .^ Sada, Pedro V.; Deming, Drake; Jennings, Donald E.; Jackson, Brian k.; Hamilton, Catrina M.; Fraine, Jonathan; Peterson, Steven W.; Haase, Flynn; Bays, Kevin; Lunsford, Allen; o'Gorman, Eamon (2012), "Extrasolar Planet Transits Observed at Kitt Peak National Observatory",Publications of the Astronomical Society of the Pacific ,124 (913):212– 229,arXiv :1202.2799 Bibcode :2012PASP..124..212S ,doi :10.1086/665043 ,S2CID 29665395 ^ Bonomo, A. S.; et al. (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 and Astrophysics .602 . A107.arXiv :1704.00373 Bibcode :2017A&A...602A.107B .doi :10.1051/0004-6361/201629882 .S2CID 118923163 . ^ Sada, Pedro V.; et al. (2012). "Extrasolar Planet Transits Observed at Kitt Peak National Observatory".Publications of the Astronomical Society of the Pacific .124 (913):212– 229.arXiv :1202.2799 Bibcode :2012PASP..124..212S .doi :10.1086/665043 .S2CID 29665395 .
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