Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation
Hercules
Right ascension
15h 52m 40.54114s[1]
Declination
+42° 27′ 05.4511″[1]
Apparent magnitude (V)
4.59[2]
Characteristics
Spectral type
G0V Fe-0.8 CH-0.5[3]
U−B color index
+0.01[2]
B−V color index
+0.57[2]
Astrometry
Radial velocity (Rv)
−56.09±0.10[4] km/s
Proper motion (μ)
RA: +438.816[1] mas/yr Dec.: +630.313[1] mas/yr
Parallax (π)
63.1627 ± 0.1490 mas[5]
Distance
51.6 ± 0.1 ly (15.83 ± 0.04 pc)
Absolute magnitude (MV)
+3.59[6]
Orbit[7]
Period (P)
51.2865±0.4082 d
Semi-major axis (a)
0.96±0.58″
Eccentricity (e)
0.0000
Inclination (i)
131.68±27.61°
Longitude of the node (Ω)
51.69±37.96°
Periastron epoch (T)
48349.0039±4.4425
Argument of periastron (ω) (secondary)
0.00°
Details
Mass
1.054+0.015 −0.054[8]M☉
Radius
1.71+0.04 −0.05[8]R☉
Luminosity
3.24[6]L☉
Surface gravity (log g)
4.02+0.02 −0.03[8] cgs
Temperature
5,837[3] K
Metallicity [Fe/H]
−0.45[3] dex
Rotational velocity (v sin i)
2.4[9] km/s
Age
7.4[10] Gyr
Other designations
χ Her, 1 Her, BD+42° 2648, FK5 1166, GJ 602, HD 142373, HIP 77760, HR 5914, SAO 45772, WDS J16254+1402AB[11]
Database references
SIMBAD
data
Chi Herculis, Latinized from χ Herculis, is a Sun-like[12] star in the northern constellation of Hercules. Based upon an annual parallax shift of 63.16 mas as seen from Earth, it is located 51.6 light years from the Sun. The star is faintly visible to the naked eye with an apparent visual magnitude of 4.59.[2] It has a relatively high proper motion, showing a transverse movement of 0.769 arc seconds per year[13] and is drifting closer to the Sun with a radial velocity of −56 km/s.[4]
This is a suspected binary star system for which orbital elements have been published, listing a circular orbit with period of 51.3 days.[7] However, sources do not confirm this and so the binarity remains in doubt.[14] The observable component is a G-type main sequence star with a stellar classification of G0V Fe-0.8 CH-0.5,[3] indicating abnormal deficiencies in iron and the CH molecule. The surface magnetic activity for this star is distinctly lower than the typical level for regular stars, and hence it is considered a good candidate for being in a Maunder minimum phase.[15]
Chi Herculis is an older star with an estimated age of 7.4 billion years and is spinning with a projected rotational velocity of 2.4.[9] It has a mass slightly higher than the Sun and 1.7 times the Sun's radius.[8] The star's photosphere is radiating 3.24[6] times the Sun's luminosity at an effective temperature of 5,837.[3] Chi Herculis has been examined for the presence of an infrared excess that could indicate an orbiting debris disk, but none was found.[12] The low metal content and a relatively high velocity of 80 kilometers per second suggest that the star is a visitor from another part of the Galaxy, and is just moving through the local neighborhood.[16]
^ abcdCite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
^ abcdCite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
^ abcdeCite error: The named reference Gray2006 was invoked but never defined (see the help page).
^ abCite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
^Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
^ abcCite error: The named reference Anderson2012 was invoked but never defined (see the help page).
^ abCite error: The named reference Hartkopf2006 was invoked but never defined (see the help page).
^ abcdCite error: The named reference Takeda2007 was invoked but never defined (see the help page).
^ abCite error: The named reference Fekel1997 was invoked but never defined (see the help page).
^Cite error: The named reference Casagrande2011 was invoked but never defined (see the help page).
^Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
^ abCite error: The named reference Maldonado2012 was invoked but never defined (see the help page).
^Cite error: The named reference Lepine2005 was invoked but never defined (see the help page).
^Cite error: The named reference Rodriguez2015 was invoked but never defined (see the help page).
^Cite error: The named reference Hempelmann1996 was invoked but never defined (see the help page).
ChiHerculis, Latinized from χ Herculis, is a Sun-like star in the northern constellation of Hercules. Based upon an annual parallax shift of 63.16 mas...
Delta Herculis (δ Herculis, abbreviated Delta Her, δ Her) is a multiple star system in the constellation of Hercules. Its light produces to us apparent...
border from Auriga into the constellation Lynx Also designated Psi Herculis (ψ Herculis, ψ Her) by Bayer, after Ptolemy – Bayer’s Uranometria and Bayer letters...
follicles of the prickly-ash (both this species and Zanthoxylum clava-herculis) has been used in herbal medicine. The extract may act as a stimulant,...
3.42 Mu Herculis Quadruple star system 3.43 2.92 Mu Centauri Star 3.43 3.41 V357 Carinae Binary star system 3.43 Lambda Aquilae Star 3.431 Chi Carinae...
Chi Capricorni, Latinized from χ Capricorni, is a star in the southern constellation of Capricornus. Based upon an annual parallax shift of 18.14 mas...
Khosroshahi, Habib; Wasatonic, Rick (December 2013). "The Age and Mass of the α Herculis Triple-star System from a MESA Grid of Rotating Stars with 1.3". The Astronomical...
Cross (Crux) method, it can be positively verified using an asterism: Sigma, Chi, Tau, and Upsilon Octantis are all stars of around magnitude 5.6, and form...
Stati Uniti". La Stampa. 4 August 2021. Event occurs at 3m08s. "Atletica, chi è Marcell Jacobs, il nuovo recordman italiano sui 100 metri" (in Italian)...
These binary systems usually have orbital periods of under 2.5 hours. DQ Herculis systems are interacting binaries in which a low-mass star transfers mass...
Khosroshahi, Habib; Wasatonic, Rick (2013). "THE AGE AND MASS OF THE α HERCULIS TRIPLE-STAR SYSTEM FROM a MESA GRID OF ROTATING STARS WITH 1.3 ⩽ M / M...
"Interferometric Observations of the Supergiant Stars α Orionis and α Herculis with FLUOR at IOTA". Astronomy and Astrophysics. 418 (2): 675–685. arXiv:astro-ph/0402099...
Dictionary of Greek and Roman Antiquities, page 930-1. London, 1875. Ara Maxima Herculis, A Topographical Dictionary of Ancient Rome, page 253-4. Oxford University...
in Stockholm July 16: Kamila Skolimowska Memorial in Silesia July 21: Herculis in Fontvieille July 23: Anniversary Games in London July 29: Diamond League...
Felicien, and a run of 12.61 seconds was only enough for third again at Herculis. She ran her second-fastest time of the season (12.51) at the DN Galan...
of Left Wall Lambda Herculis Maasym 趙 Zhào The state of Zhao 天市左垣三 Tiān Shì Zuǒ Yuán sān the Third Star of Left Wall Mu Herculis 九河 Jiǔ Hé Jiuhe 天市左垣四...
Pretoria, South Africa 800 m 1:42.79 Yusuf Saad Kamel Bahrain 29 July 2008 Herculis Fontvieille, Monaco 1000 m 2:14.72 Yusuf Saad Kamel Bahrain 22 July 2008...
Graeci, Vol. I: Apollodori bibliotheca. Pediasimi libellus de duodecim Herculis laboribus, De Gruyter, 1996, p. v. (in Italian) F. Pignatti, "Egio, Benedetto"...