G-type main sequence star in the constellation Hercules
72 Herculis
Observation dataEpoch J2000 Equinox J2000
Constellation
Hercules
Right ascension 17h 20m 39.56754s [ 1]
Declination
+32° 28′ 03.8773″[ 1]
Apparent magnitude (V)± 0.005[ 2]
Characteristics
Evolutionary stage
Main sequence
Spectral type
G0 V[ 3]
U−B color index
+0.06[ 4]
B−V color index
+0.62[ 4]
Variable type
Suspected
Astrometry Radial velocity (Rv )± 0.0065[ 5] Proper motion (μ) RA: +135.731[ 1] mas /yr Dec.: −1040.913[ 1] mas /yr Parallax (π)68.7539 ± 0.0904 mas Distance 47.44 ± 0.06 ly pc ) Absolute magnitude (MV )± 0.05[ 2] Details Mass M ☉ [ 2] [ 6] M ☉ Radius +0.004 [ 1] R ☉ Luminosity ± 0.003[ 1] L ☉ Surface gravity (log g )± 0.10[ 2] cgs Temperature ± 35[ 7] K Metallicity ± 0.11[ 7] dex Rotational velocity (v sin i )± 1.0[ 2] Age 4.1–6.6[ 8] Gyr Other designations w Her ,
72 Her ,
NSV 8553,
BD +32°2896,
FK5 1456,
GJ 672,
HD 157214,
HIP 84862,
HR 6458,
SAO 65963,
LHS 441,
LTT 15148
[ 9] Database references SIMBAD data
72 Herculis is a single[ 10] star in the northern constellation of Hercules . The Flamsteed designation for this star comes from the publication Historia Coelestis Britannica by John Flamsteed . It is the 72nd star in Flamsteed's list of stars in Hercules. This star is faintly visible to the naked eye with an apparent visual magnitude of 5.4.[ 2] Parallax measurements show this star to be located at a distance of about 47 light years from the Sun .[ 1] radial velocity of −78.6 km/s,[ 5] [ 6]
This is an ordinary G-type main-sequence star with a stellar classification of G0 V. It is similar in mass to the Sun ,[ 2] [ 1] [ 1] luminosity of the Sun from its photosphere at an effective temperature of [ 7] metallicity is much lower than in the Sun, with an [Fe/H] equal to ± 0.11[ 7] [ 8] projected rotational velocity of 1 km/s.[ 2] chromospheric activity appears to be at or below that in the Sun.[ 11]
As of 2010, no planetary companion had been detected orbiting this star.[ 12] Washington Visual Double Star Catalog for 1996 showed two visual companions of this star. The first is a visual magnitude 9.7 star located 289.1 arc seconds away. The second is only separated by 8.7 arc seconds, and is magnitude 12.9.[ 13]
References
^ a b c d e f g h i 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 .^ a b c d e f g h 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 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 . ^ a b c d 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 . ^ a b Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal . 687 (2): 1264– 1293. arXiv :0807.1686 Bibcode :2008ApJ...687.1264M . doi :10.1086/591785 . S2CID 27151456 . ^ "72 Her" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 31 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 ^ 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
