G-type main sequence star in the constellation Hercules
72 Herculis Location of 72 Herculis (circled in red)
Observation dataEpoch J2000 Equinox J2000 Constellation Hercules Right ascension 17h 20m 39.56745s [ 1] Declination +32° 28′ 03.8780″[ 1] Apparent magnitude (V)± 0.005[ 2] Characteristics Evolutionary stage subgiant [ 1] Spectral type G0 V[ 3] U−Bcolor index +0.06[ 4] B−Vcolor index +0.62[ 4] Variable type Suspected Astrometry Radial velocity (Rv )± 0.0065[ 5] km/s Proper motion (μ)RA: +135.810[ 1] mas /yr Dec.: −1,040.953[ 1] mas /yr Parallax (π)68.5575± 0.0553 mas Distance 47.57 ± 0.04 ly pc ) Absolute magnitude (MV )± 0.05[ 2] Details Mass 0.93[ 6] M ☉ Radius 1.17[ 6] R ☉ Luminosity 1.30[ 6] L ☉ Surface gravity (log g )4.33[ 6] cgs Temperature 5,704[ 6] K Metallicity [Fe/H] ± 0.11[ 7] dex Rotation 21 days[ 8] Rotational velocity (v sin i )± 1.0[ 2] Age 13[ 6] Gyr Other designations w Her ,72 Her ,NSV 8553BD +32°2896FK5 1456GJ 672HD 157214HIP 84862HR 6458SAO 65963LHS 441LTT 15148[ 9] Database references SIMBAD data
72 Herculis is a single[ 10] star in the northernconstellation ofHercules . TheFlamsteed designation for this star comes from the publicationHistoria Coelestis Britannica byJohn Flamsteed . It is the 72nd star in Flamsteed's list of stars in Hercules. This star is faintly visible to the naked eye with anapparent visual magnitude of 5.4.[ 2] Parallax measurements show this star to be located at a distance of about 48light years from theSun .[ 1] radial velocity of −78.6 km/s,[ 5] [ 11]
This is an ordinaryG-type main-sequence star with astellar classification of G0 V. It is similar in mass to theSun , with a 17% larger radius. The star is radiating 1.3 times theluminosity of the Sun from itsphotosphere at an effectivetemperature of[ 6] metallicity is much lower than in the Sun, with an [Fe/H] equal to± 0.11[ 7] [ 6] projected rotational velocity of 1 km/s.[ 2] chromospheric activity appears to be at or below that in the Sun.[ 12]
As of 2010, no planetary companion had been detected orbiting this star.[ 13] Washington Visual Double Star Catalog for 1996 showed two visual companions of this star. The first is a visual magnitude 9.7 star located 289.1arc seconds away. The second is only separated by 8.7 arc seconds, and is magnitude 12.9.[ 14]
^a b c d e f 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 Fuhrmann, Klaus (February 2008)."Nearby stars of the Galactic disc and halo - IV" .Monthly Notices of the Royal Astronomical Society 384 (1):173– 224.Bibcode :2008MNRAS.384..173F .doi :10.1111/j.1365-2966.2007.12671.x ^ Cenarro, A. J.; et al. (July 2009)."Mg and TiO spectral features at the near-IR: spectrophotometric index definitions and empirical calibrations" .Monthly Notices of the Royal Astronomical Society .396 (4):1895– 1914.arXiv :0903.4835 Bibcode :2009MNRAS.396.1895C .doi :10.1111/j.1365-2966.2009.14839.x S2CID 15729759 . ^a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)".Catalogue of Eggen's UBV Data. SIMBAD .Bibcode :1986EgUBV........0M . ^a b Soubiran, C.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars".Astronomy and Astrophysics .616 : A7.arXiv :1804.09370 Bibcode :2018A&A...616A...7S .doi :10.1051/0004-6361/201832795 .S2CID 52952408 . ^a b c d e f g h Tuchow, Noah W.; Stark, Christopher C.; Mamajek, Eric (2024)."HPIC: The Habitable Worlds Observatory Preliminary Input Catalog" .The Astronomical Journal .167 (3): 139.Bibcode :2024AJ....167..139T .doi :10.3847/1538-3881/ad25ec ^a b Stonkutė, E.; et al. (2020)."High-resolution Spectroscopic Study of Dwarf Stars in the Northern Sky: Lithium, Carbon, and Oxygen Abundances" .The Astronomical Journal .159 (3): 90.arXiv :2002.05555 Bibcode :2020AJ....159...90S .doi :10.3847/1538-3881/ab6a19 S2CID 211096705 . ^ Isaacson, Howard; Fischer, Debra (2010). "Chromospheric Activity and Jitter Measurements for 2630 Stars on the California Planet Search".The Astrophysical Journal .725 (1): 875.arXiv :1009.2301 Bibcode :2010ApJ...725..875I .doi :10.1088/0004-637X/725/1/875 . ^ "72 Her" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved31 January 2018 .^ Fuhrmann, K.; et al. (February 2017)."Multiplicity among Solar-type Stars" .The Astrophysical Journal .836 (1): 23.Bibcode :2017ApJ...836..139F .doi :10.3847/1538-4357/836/1/139 ^ Bailer-Jones, C.A.L.; et al. (2018). "New stellar encounters discovered in the second Gaia data release".Astronomy & Astrophysics .616 : A37.arXiv :1805.07581 Bibcode :2018A&A...616A..37B .doi :10.1051/0004-6361/201833456 .S2CID 56269929 . ^ Hall, Jeffrey C.; et al. (July 2009)."The Activity and Variability of the Sun and Sun-Like Stars. II. Contemporaneous Photometry and Spectroscopy of Bright Solar Analogs" .The Astronomical Journal .138 (1):312– 322.Bibcode :2009AJ....138..312H .doi :10.1088/0004-6256/138/1/312 S2CID 12332945 . ^ Lubin, Dan; et al. (June 2010)."Lithium Abundance in Solar-type Stars with Low Chromospheric Activity: Application to the Search for Maunder Minimum Analogs" .The Astrophysical Journal .716 (1):766– 775.Bibcode :2010ApJ...716..766L .doi :10.1088/0004-637X/716/1/766 ^ Mason, B. D.; et al. (2014)."The Washington Visual Double Star Catalog" .The Astronomical Journal .122 (6):3466– 3471.Bibcode :2001AJ....122.3466M .doi :10.1086/323920
