12199-0040 MCA  37 (Zaniah)

 
 
12h 19m 54.39s -00 40' 00.3" P.A. 215.4 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
2017
Obs
88
Pa first
152
Pa last
195
P.A. Now (θ)
215.4°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.1"
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
 
 
Precise pa
194.8
Precise sep
0.112
Common name
Zaniah
Meaning
angle
Cdsa2 id
MCA 37
Constellation
Virgo
SAO
138721
HIP
60129
HD
107259
HR
4689
GC
16813
Bayer
Eta Virginis
Bayer name
Eta Vir
Flamsteed
15 Virginis
Flamsteed name
15 Vir
Ra deg
12.331775
De deg
-0.66675
Distance
81.37
Distance ly
265.43
last precise pa
194.8
last precise sep
0.112
 
 
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° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.088 74.0
2001 0.092 115.5
2002 0.112 146.7
2003 0.124 169.3
2004 0.117 190.8
2005 0.097 218.7
2006 0.086 258.7
2007 0.099 298.3
2008 0.124 324.5
2009 0.142 342.5
2010 0.145 357.9
2011 0.133 14.3
2012 0.109 36.2
2013 0.089 69.9
2014 0.091 111.7
2015 0.110 144.1
2016 0.124 167.2
2017 0.119 188.5
2018 0.100 215.4
2019 0.086 254.3
2020 0.097 294.9
2021 0.121 322.4
2022 0.141 340.9
2023 0.145 356.3
2024 0.134 12.5
2025 0.112 33.6
2026 0.090 65.9
2027 0.089 107.7
2028 0.108 141.4
2029 0.123 165.1
2030 0.120 186.3

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

grafico orbita





wds12199-0040a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
12199-0040 MCA 37 2008 81 333 0.1 3.89 5.90 A2IV NOD 121954.39-004000.3
12199-0040 MCA 37 2017 88 195 0.1 3.89 5.90 A2IV NO 121954.39-004000.3

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