12158-2321 BU  920

 
 
12H 15M 46.68S -23 21' 13.9" P.A. 307.5 SEP 1.91 MAG 6.86,8.22 SP F7V DIST. 69.59 PC (227 L.Y.)
 
 
Coord 2000
12158-2321
Discov num
BU  920
Comp
Coord arcsec 2000
12 15 46.68 -23 21 13.9
Date first
1879
Date last
2016
Obs
66
Pa first
52
Pa last
307
P.A. Now (θ)
307.5°
Sep first
0.8
Sep last
1.9
Sep. Now (ρ)
1.91"
Mag pri
6.86
Mag sec
8.22
delta mag (ΔM)
1.36
Spectral class
F7V (yellow-white)
Pri motion ra
-009
Sec motion ra
-009
Pri motion dec
-039
Sec motion dec
-039
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Corvus
SAO
180619
HIP
59801
Tycho2
6668-00972-1
HD
106612
HR
4661
ADS
8481
BD
BD-22 3322
CD
CD-22 9344
CP
CP-22 5270
Distance
69.59
Distance ly
227
last precise pa
307.2
last precise sep
1.934
 
 
ORBITAL ELEMENTS
 
 
Period (P)873.041y± 25.251 Periastron (T)1764.26y± 6.576 Semi-major axis (a)2.012a± 0.137
Eccentricity (e)0.166± 0.026 Inclination (i)63.5°± 3.9 Longitude of periastron (ω)28°± 3.6
Node (Ω)142.2°± 3.7 Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 1.779 303.8
2001 1.787 304.0
2002 1.795 304.3
2003 1.803 304.5
2004 1.811 304.7
2005 1.819 304.9
2006 1.827 305.2
2007 1.834 305.4
2008 1.842 305.6
2009 1.850 305.8
2010 1.857 306.0
2011 1.865 306.2
2012 1.872 306.4
2013 1.880 306.7
2014 1.887 306.9
2015 1.894 307.1
2016 1.901 307.3
2017 1.909 307.5
2018 1.916 307.7
2019 1.923 307.9
2020 1.930 308.1
2021 1.937 308.3
2022 1.943 308.5
2023 1.950 308.7
2024 1.957 308.8
2025 1.964 309.0
2026 1.970 309.2
2027 1.977 309.4
2028 1.983 309.6
2029 1.990 309.8
2030 1.996 310.0

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic