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 |
|
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) | 4° | |
| Node (Ω) | 173° | |
Notes | n | |
Reference | Sod1999 | |
| Equinox | 2000 | |
Last observation | | |
Grade | 2 | (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 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
