- Chi Virginis
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Chi Virginis Observation data
Epoch J2000.0 Equinox J2000.0Constellation Virgo Right ascension 12h 39m 14.7669s Declination –07° 59′ 44.032″ Apparent magnitude (V) 4.657 Characteristics Spectral type K2III U−B color index 1.357 B−V color index 1.247 V−R color index –0.618 R−I color index –1.768 Astrometry Radial velocity (Rv) –19.7 ± 0.9 km/s Proper motion (μ) RA: –77.30 mas/yr
Dec.: –24.66 mas/yrParallax (π) 10.24 ± 0.88 mas Distance 320 ± 30 ly
(98 ± 8 pc)Absolute magnitude (MV) –0.114 Details Mass 2.17 ± 0.28 M☉ Radius 20.9 ± 1.1 R☉ Surface gravity (log g) 2.80 Luminosity 153 L☉ Temperature 4445 ± 70 K Metallicity 0.19 ± 0.05 Age 0.95 ± 0.4 Gyr Other designations Database references SIMBAD data NStED data Extrasolar Planets
Encyclopaediadata Chi Virginis (χ Vir, χ Virginis) is a star system in the constellation Virgo. It is approximately 319 light years from Earth.
The primary component, Chi Virginis A, is an orange K-type giant with an apparent magnitude of +4.66. It has three distant companions. At 173.1 arcseconds distant is the magnitude +9.1 Chi Virginis B, which is of spectral type K0. Chi Virginis C is a 10th magnitude star 221.2 arcseconds away from A, and Chi Virginis D is a magnitude +9.1 K2 star 321.2 arcseconds away.
In July 2009, it was discovered that star A has a massive planet in an eccentric orbit.[1]
The Chi Virginis system Companion
(in order from star)Mass Semimajor axis
(AU)Orbital period
(days)Eccentricity b ≥11.09 ± 1 MJ 2.14 ± 0.03 835.477 ± 6 0.462 ± 0.069 See also
- 70 Virginis
- HD 16760
- List of extrasolar planets
References
- ^ De Medeiros; et al. (2009). "A planet around the evolved intermediate-mass star HD 110014". aanda. http://aanda.org/articles/aa/pdf/forth/aa11658-09.pdf.
Virgo constellation Stars Bayer α (Spica) • β (Zavijava) • γ (Porrima) • δ (Auva) • ε (Vindemiatrix) • ζ (Heze) • η (Zaniah) • θ • ι (Syrma) • κ • λ (Khambalia) • μ (Rijl al Awwa) • ν • ξ • ο • π • ρ • σ • τ • υ • φ • χ • ψ • ω • b • c • d¹ • d² • e • f • g • h • i • k • l • m • o • p • q • y • A¹ • A² • MFlamsteed 1 (ω) • 2 (ξ) • 3 (ν) • 4 (A¹) • 5 (β, Zavijava) • 6 (A²) • 7 (b) • 8 (π) • 9 (ο) • 10 • 11 • 12 • 13 • 15 (η, Zaniah) • 16 (c) • 17 • 20 • 21 (q) • 25 (f) • 26 (χ) • 27 • 28 • 29 (γ, Porrima) • 30 (ρ) • 31 (d¹) • 32 (d²) • 33 • 34 • 35 • 37 • 38 • 40 (ψ) • 41 • 43 (δ, Auva) • 44 • 46 • 47 (ε, Vindemiatrix) • 48 • 49 • 50 • 51 (θ) • 53 • 54 • 55 • 56 • 57 • 59 (e) • 60 (σ) • 61 • 62 • 63 • 64 • 65 • 66 • 67 (α, Spica) • 68 (i) • 69 • 70 • 71 • 72 • 73 • ) • 75 • 76 (h) • 77 • ) • 79 (ζ, Heze) • 80 • 82 (m) • 83 • 84 • 85 • 86 • 87 • 89 • 90 (p) • 92 • 93 (τ) • 94 • 95 • 96 • 98 (κ) • 99 (ι, Syrma) • 100 (λ, Khambalia) • 102 (υ) • 104 • 105 (φ) • 106 • 107 (μ, Rijl al Awwa) • 108 • 109 • 110 • 2 SerNearby Ross 128 • Wolf 424 • FL (Wolf 424 B) • GL • Gliese 514 • Gliese 493.1 • Gliese 518 • Gliese 486 • GJ 1154 • 61 • GJ 3820List Galaxy cluster Categories:- Bayer objects
- Flamsteed objects
- Virgo constellation
- K-type giants
- Henry Draper Catalogue objects
- HIP objects
- HR objects
- Durchmusterung objects
- Planetary systems
- Giant star stubs
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