14 Herculis

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14 Herculis
Observation data Epoch J2000.0 Equinox J2000.0
14 Herculis
Constellation	Hercules
Right ascension	16^h 10^m 23.59^s
Declination	+43° 49′ 18.2″
Apparent magnitude (V)	+6.67
Characteristics
Spectral type	K0V
U−B color index	0.67
B−V color index	0.88
Variable type	None
Astrometry

Radial velocity (R_v)	−5.5 km/s
Proper motion (μ)	RA: 132.52 mas/yr Dec.: −298.38 mas/yr
Parallax (π)	55.11 ± .59 mas
Distance	59 ly (18.1 pc)
Absolute magnitude (M_V)	+5.38

Details

Mass	0.79 M_☉
Radius	0.88 R_☉
Luminosity	0.75 L_☉
Surface gravity (log g)	4.315
Temperature	5250 K
Metallicity	0.35 [Fe/H]
Age	3.9 × 10⁹ years

Other designations
Gl 614, HD 145675, HIP 79248
Database references
SIMBAD	data

14 Herculis or 14 Her is an orange dwarf star approximately 59 light-years away in the constellation Hercules. Because of its apparent magnitude, the star cannot be seen with the naked eye. As of 2006, it is thought that 14 Herculis has two extrasolar planets in orbit around the star.

Contents

1 Stellar components
2 Planetary system
3 See also
4 References
5 External links

Stellar components

14 Herculis is an orange dwarf star of the spectral type "K0V." It is though that the star has only 79 percent the mass of the Sun, 88 percent of the radius, and 75 percent of the luminosity. The star appears to be 3.2 times as enriched with elements heavier than hydrogen (based on its abundance of iron).

Planetary system

In 1998 an extrasolar planet was discovered to orbit 14 Herculis, which received the designation 14 Herculis b.^[1] The planet is located in an eccentric, long-period orbit which takes around 4.8 years to complete.^[2] In 2005, a possible second planet was proposed, designated 14 Herculis c.^[3] The parameters of this planet are uncertain, but a recent analysis suggests it may lie in the 4:1 resonance with the inner planet, with an orbital period of almost 19 years at an orbital distance of 6.9 AU.^[2]

The 14 Herculis system^[2]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity
b	≥4.64 ± 0.19 M_J	2.77 ± 0.05	1773.4 ± 2.5	0.369 ± 0.005
c	≥2.1 M_J	6.9	6906 ± 70	0 (fixed)

References

^ Mayor, M. et al. (1998). "Searching for giant planets at the Haute-Provence Observatory". In (ed. Hearnshaw, J. B. and Scarfe, C. D.). Precise Stellar Radial Velocities. IAU Colloqu. 170. San Francisco: ASP.
^ ^a ^b ^c Wittenmyer, R. A., Endl, M., Cochran, W. D. (2007). "Long-Period Objects in the Extrasolar Planetary Systems 47 Ursae Majoris and 14 Herculis". The Astrophysical Journal 654 (1): 625–632. arXiv:astro-ph/0609117. Bibcode 2007ApJ...654..625W. doi:10.1086/509110.
^ Goździewski, K., Konacki, M., Maciejewski, A. J. (2006). "Orbital Configurations and Dynamical Stability of Multiplanet Systems around Sun-like Stars HD 202206, 14 Herculis, HD 37124, and HD 108874". The Astrophysical Journal 645 (1): 688–703. arXiv:astro-ph/0511463. Bibcode 2006ApJ...645..688G. doi:10.1086/504030.

External links

"14 Herculis". Extrasolar Visions. http://www.extrasolar.net/startour.asp?StarCatId=normal&StarId=8. Retrieved 2008-06-25.
"14 Herculis". SolStation. Archived from the original on 19 July 2008. http://web.archive.org/web/20080719164703/http://www.solstation.com/stars2/14her.htm. Retrieved 2008-06-25.
"New Worlds Atlas". Jet Propulsion Laboratory. Planet Quest. Archived from the original on 12 June 2008. http://web.archive.org/web/20080612100938/http://planetquest1.jpl.nasa.gov/atlas/atlas_search.cfm?. Retrieved 2008-06-25.
Jean Schneider (2011). "Notes for star 14 Her". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=14+Her. Retrieved 2011-10-30.

v t e 14 Herculis system

Stars	14 Herculis

Planets	14 Herculis b 14 Herculis c

← «Bright» star systems within 50–60 light-years →

Star systems within 50–60 light-years from Earth with brightest member's absolute magnitude of +8.5 or brighter.

A V (White)	Castor (51.6 ± 1.0 ly; 6 stars) • Delta Leonis «Zosma» (57.7 ± 0.9 ly; 2 stars) • Iota Centauri «Alhakim» (58.6 ± 0.8 ly; 1 star) • Beta Arietis «Sheratan» (59.6 ± 0.8 ly; 2 stars)‡

F
(Yellow-
white)

IV	Delta Aquilae «Denebokab» (50.1 ± 0.6 ly; 3 stars)‡ • I Carinae (52.9 ± 0.4 ly; 1 star) • Beta Cassiopeiae «Caph» (54.5 ± 0.5 ly; 2 stars) • Xi Geminorum «Alzirr» (57.2 ± 0.8 ly; 1 star) • Psi Velorum (59.7 ± 1.0 ly; 2 stars)‡ • Mu Virginis (60.9* ± 1.1 ly; 1 star)‡*

V	Sigma Boötis «Hemelein Secunda» (50.4 ± 0.6 ly; 2 stars)‡ • Tau Boötis (50.9 ± 0.6 ly; 2 stars, 1 planet: planet b) • Alpha Circini (53.5 ± 0.5 ly; 2 stars) • q¹ Eridani (56.6 ± 0.6 ly; 1 star, 1 planet: planet b) • g Lupi (57.1 ± 0.7 ly; 1 star) • Alpha Comae Berenices «Diadem» (58.3 ± 1.5 ly; 3 stars) • Delta Geminorum «Wasat» (58.8 ± 0.9 ly; 3 stars) • Chi Cancri (59.2 ± 1.0 ly; 1 star)‡ • Eta Corvi «Avis Satyra» (59.4 ± 0.7 ly; 1 star)‡ • Delta Equulei «Pherasauval» (60.0* ± 1.0 ly; 2 stars)‡*

G
(Yellow)

IV	Chi Eridani (57.0 ± 0.6 ly; 2 stars)

V	Mu Arae (49.8* ± 0.6 ly; 1 star, 4 planets: planet d • planet e • planet b • planet c)‡* • 51 Pegasi (50.1 ± 0.6 ly; 1 star, 1 planet: planet b «Bellerophon»)‡ • HR 7368 (50.5 ± 0.5 ly; 1 star, 2 brown dwarfs: brown dwarf C • brown dwarf B) • HR 2007 (50.8 ± 0.9 ly; 1 star, 1 planet: planet b)‡ • HR 8323 (51.0 ± 0.6 ly; 1 star) • HR 7670 (51.8 ± 0.5 ly; 3 stars, 2 planets: planet c • planet b) • Psi⁵ Aurigae (53.9 ± 0.6 ly; 1 star) • HR 3538 (55.8 ± 0.8 ly; 1 star) • Iota Horologii (56.2 ± 0.5 ly; 1 star, 1 planet: planet b) • 37 Geminorum (56.3 ± 0.9 ly; 1 star) • Rho Coronae Borealis (56.8 ± 0.7 ly; 1 star, 1 planet: planet b) • GJ 3021 (57.5 ± 0.5 ly; 1 star, 1 planet: planet b) • 15 Sagittae (57.6 ± 0.6 ly; 1 star, 1 brown dwarf) • HR 7644 (57.8 ± 0.8 ly; 1 star, 1 planet: planet b) • HR 5534 (58.5 ± 0.9 ly; 1 star, 2 brown dwarfs) • Gliese 651 (58.9 ± 0.6 ly; 1 star, 1 planet: planet b) • 70 Virginis (59.1 ± 0.8 ly; 1 star, 1 planet: planet b) • Pi Mensae (59.4 ± 0.5 ly; 1 star, 1 planet: planet b)

K
(Orange)

IV	83 Leonis (57.6 ± 1.5 ly; 2 stars, 2 planets: planet Bb • planet Bc) • Epsilon Reticuli (59.5 ± 0.5 ly; 1 star, 1 planet: planet b)‡

V	GJ 3860 (54.0 ± 0.9 ly; 1 star, 2 planets) • Gliese 56.5 (54.9 ± 0.5 ly; 1 star, 1 planet: planet b) • HD 87883 (58.9 ± 1.0 ly; 1 star, 1 planet: planet b) • Gliese 652 (59.0 ± 0.9 ly; 1 star, 1 planet: planet b) • 14 Herculis (59.2 ± 0.6 ly; 1 star, 1 planet: planet b)

In left column are stellar classes of primary members of star systems. ‡Distance error margin extends out of declared distance interval. Italic are systems possibly located within declared distance interval, but probably not.

v t e Stars of Hercules

Bayer	α (Rasalgethi) β (Kornephoros) γ δ (Sarin) ε (Cujam) ζ (Rutilicus) η θ ι κ (Marfik) λ (Maasym) μ ν ξ ο (Atia) π ρ σ τ υ φ χ ω (Kajam) b c d e f g h i k l m n o q r s t u w x y z A

Flamsteed	1 (χ) 2 4 5 (r) 6 (υ) 7 (κ, Marfik) 8 9 10 11 (φ) 13 14 16 19 20 (γ) 21 (o) 22 (τ) 24 (ω, Kajam) 25 27 (β, Kornephoros) 28 (n) 29 (h) 30 (g) 31 32 33 34 35 (σ) 36 37 (m) 38 39 40 (ζ, Rutilicus) 41 42 43 (i) 44 (η) 45 (l) 46 47 (k) 48 49 50 51 52 53 54 56 57 58 (ε, Cujam) 59 (d) 60 61 63 64 (α, Rasalgethi) 65 (δ, Sarin) 67 (π) 68 (u) 69 (e) 70 72 (w) 73 74 75 (ρ) 76 (λ, Maasym) 77 (x) 78 79 82 (y) 83 84 85 (ι) 86 (μ) 87 88 (z) 89 90 (f) 91 (θ) 92 (ξ) 93 94 (ν) 95 96 97 98 99 (b) 100 101 102 103 (ο, Atia) 104 (A) 105 106 107 (t) 108 109 110 111 112 113

Nearby	WISE 1738+2732 WISE 1741+2553

List

Coordinates: 16^h 10^m 23.59^s, +43° 49′ 18.2″

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