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Eta Virginis information


η Virginis
(incl. Zaniah)
Location of η Virginis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Virgo
Right ascension 12h 19m 54.35783s[1]
Declination –00° 40′ 00.5095″[1]
Apparent magnitude (V) 3.890[2]
Characteristics
Spectral type A2 V[3]
U−B color index +0.055[2]
B−V color index +0.029[2]
Astrometry
Radial velocity (Rv)+2.3[4] km/s
Proper motion (μ) RA: –57.58[1] mas/yr
Dec.: –25.19[1] mas/yr
Parallax (π)13.264 ± 0.161 mas[5]
Distance246 ± 3 ly
(75.4 ± 0.9 pc)
Absolute magnitude (MV)−0.66[6]
Orbit[7]
Primaryη Vir Aa
Companionη Vir Ab
Period (P)71.7916 ± 0.0006 days
Semi-major axis (a)0.00736 ± 0.0006″
Eccentricity (e)0.244 ± 0.007
Inclination (i)45.5 ± 0.9°
Orbit[7]
Primaryη Vir A
Companionη Vir B
Period (P)7,896.2 ± 0.2 days
Semi-major axis (a)0.133 ± 0.001″
Eccentricity (e)0.087 ± 0.002
Inclination (i)50.6 ± 0.1°
Details
η Vir Aa
Mass2.5039 ± 0.1246[8] M
Surface gravity (log g)3.0[9] cgs
Temperature9,333[9] K
Metallicity [Fe/H]+0.11[9] dex
Rotational velocity (v sin i)18[10] km/s
η Vir Ab
Mass1.8907 ± 0.0932 M
Details[7]
η Vir B
Mass1.66 ± 0.16 M
Other designations
Zaniah, 15 Virginis, HR 4689, HD 107259, BD+00°2926, FK5 460, HIP 60129, SAO 138721, CCDM 12199-0040, WDS J12199-0040[11]
Database references
SIMBADdata

Eta Virginis (η Virginis, abbreviated Eta Vir, η Vir) is a triple star system in the zodiac constellation of Virgo. From parallax measurements, it is about 246 light-years (75 parsecs) from the Sun.[5] It has a combined apparent visual magnitude of 3.89,[2] bright enough to be seen with the naked eye in dark skies.

The system consists of[12] a binary pair designated Eta Virginis A together with a third companion, Eta Virginis B. A's two components are themselves designated Eta Virginis Aa (officially named Zaniah /ˈzniə/, the traditional name of the system)[13][14] and Ab.

  1. ^ a b c d Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference saaoc8_59 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference pasp84_500_584 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference gcsrv was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference orbital_parallax was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference hummel was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference aj142_1_6 was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference ajs15_21 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference aaa463_2_671 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ "Displaying next number in catalog HIP => 60129". Multiple Star Catalog. Archived from the original on 2020-10-03. Retrieved 2018-02-18.
  13. ^ Kunitzsch, Paul; Smart, Tim (2006). A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations (2nd rev. ed.). Cambridge, Massachusetts: Sky Pub. ISBN 978-1-931559-44-7.
  14. ^ "Naming Stars". IAU.org. Retrieved 16 December 2017.

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synthesis of an image of Mizar; then a first-ever six-way synthesis of Eta Virginis in 2002; and most recently "closure phase" as a step to the first synthesized...

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stars in the night sky. It has the Bayer designation α Virginis, which is Latinised to Alpha Virginis and abbreviated Alpha Vir or α Vir. Analysis of its...

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List of Arabic star names

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Angle of the Barking Dog زاوية العواء Beta Virginis Zawiah aka Zaniah az-Zāwiyah The angle الزاوية Eta Virginis Zubenelgenubi az-Zubān ul-Janūbiy Southern...

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Planetary transits and occultations

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asterism consisting of Alpha Comae Berenices, Eta Virginis, Gamma Virginis, Delta Virginis and Epsilon Virginis. Consequently, the Chinese name for Alpha...

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2405 and 2485 kelvins. The location of SS Virginis is two degrees north-following of η Virginis (Eta Virginis, Zaniah). Citations "Download Data". aavso...

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Wall Gamma Virginis Porrima 東上相 Dōng Shàng Xiàng The First Eastern Minister 太微左垣三 Tài Wēi Zuǒ Yuán sān the Third Star of Left Wall Delta Virginis Minelauva...

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is a red dwarf in the equatorial zodiac constellation of Virgo, near β Virginis. The apparent magnitude of Ross 128 is 11.13, which is too faint to be...

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75 Delta Ophiuchi Star Suspected variable star 2.74 Gamma Virginis Binary star system 2.74 Eta Draconis Binary star system 2.75 Alpha2 Librae Binary star...

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It is located in the constellation Virgo, between the stars ε Virginis and ο Virginis. The close binary nature of this star was discovered by Dutch American...

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Bear Eta Ursae Majoris 27 Virgo 12 Venus & Moon magnet succory Algorab Corvi Delta Corvi 13 Libra 43 Saturn & Mars onyx burdock Spica Alpha Virginis 24...

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Cepheid variable

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Cepheids include: Eta Aquilae, Zeta Geminorum, Beta Doradus, RT Aurigae, Polaris, as well as Delta Cephei. Type II Cepheids include: W Virginis, Kappa Pavonis...

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Stellar classification

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37 Ursae Majoris F2V – 78 Ursae Majoris F7V - Iota Piscium F9V - Beta Virginis F9V - HD 10647 G-type stars, including the Sun, have prominent spectral...

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with periods less than a day and amplitudes of a magnitude of less; W Virginis variables, more-luminous pulsating variables also known as type II Cepheids...

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(2009-02-11). "The radius and other fundamental parameters of the F9 V star beta Virginis". Monthly Notices of the Royal Astronomical Society. 393 (1): 245–252....

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equivocal evidence for a third in the habitable zone (2020) Ross 128 (FI Virginis) 11.0074 ±0.0011 Vir* 11h 47m 44.4s +00° 48′ 16″ M4.0Vn 0.168 11.13 13...

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cross the instability strip during a blue loop are thought to become W Virginis variables. More massive stars, crossing the instability strip during a...

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