Back زاوية العذراء Arabic Zaniah AST Eta Virginis BS Eta de la Verge Catalan HD107259 CE Zaniah German Zaniah Spanish زاویه عذرا Persian Eta Virginis French Zaniah Italian

Eta Virginis

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 /ˈzeɪniə/, 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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