12199-0040 MCA 37 (Zaniah)

 
 
12h 19m 54.39s -00 40' 00.3" P.A. 328.00 sep 0.1 mag 3.89,5.90 Sp A2IV dist. 81.37 pc (265.43 l.y.)
 
 
Coord 2000 12199-0040 Discov num MCA  37 Comp Coord arcsec 2000 12 19 54.39 -00 40 00.3
Date first 1976 Date last 2021 Obs 94
Pa first 152 Pa last 328.4 P.A. Now (θ) 356.3°
Sep first 0.1 Sep last 0.124 Sep. Now (ρ) 0.145"
Mag pri 3.89 Mag sec 5.90 delta mag (ΔM) 2.01 Spectral class A2IV (white)
Pri motion ra -063 Sec motion ra
Pri motion dec -018 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Zaniah Var name NSV5555 Vir Constellation Virgo SAO 138721
HIP 60129 Tycho2 4940-01158-1 HD 107259 HR 4689
GC 16813 BD BD+00 2926 Bayer Eta Virginis Bayer name Eta Vir
Flamsteed 15 Virginis Flamsteed name 15 Vir FK5 460 Distance 81.37
Distance ly 265.43 Bayer greek η Vir
Meaning angle
 
 
ORBITAL ELEMENTS
 
 
Period (P)13.1y Periastron (T)1990.2y Semi-major axis (a)0.135a
Eccentricity (e)0.08 Inclination (i)50° Longitude of periastron (ω)
Node (Ω)173° Notesn ReferenceSod1999
Equinox2000 Last observation Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 74.0 0.088
2001 115.5 0.092
2002 146.7 0.112
2003 169.3 0.124
2004 190.8 0.117
2005 218.7 0.097
2006 258.7 0.086
2007 298.3 0.099
2008 324.5 0.124
2009 342.5 0.142
2010 357.9 0.145
2011 14.3 0.133
2012 36.2 0.109
2013 69.9 0.089
2014 111.7 0.091
2015 144.1 0.110
2016 167.2 0.124
2017 188.5 0.119
2018 215.4 0.100
2019 254.3 0.086
2020 294.9 0.097
2021 322.4 0.121
2022 340.9 0.141
2023 356.3 0.145
2024 12.5 0.134
2025 33.6 0.112
2026 65.9 0.090
2027 107.7 0.089
2028 141.4 0.108
2029 165.1 0.123
2030 186.3 0.120


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds12199-0040a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic