12291+3123 STT 251

 
 
12H 29M 07.72S +31 23' 25.4" P.A. 61.6 SEP 0.68 MAG 8.35,9.27 SP G0 DIST. 173.61 PC (566.32 L.Y.)
 
 
Coord 2000
12291+3123
Discov num
STT 251
Comp
Coord arcsec 2000
12 29 07.72 +31 23 25.4
Date first
1843
Date last
2015
Obs
79
Pa first
123
Pa last
61
P.A. Now (θ)
61.6°
Sep first
0.4
Sep last
0.7
Sep. Now (ρ)
0.68"
Mag pri
8.35
Mag sec
9.27
delta mag (ΔM)
0.92
Spectral class
G0 (yellow)
Pri motion ra
+148
Sec motion ra
+148
Pri motion dec
-041
Sec motion dec
-041
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Canes Venatici
SAO
63020
HIP
60920
Tycho2
2528-00473-1
HD
108693
ADS
8569
BD
BD+32 2250
Distance
173.61
Distance ly
566.32
last precise pa
61.4
last precise sep
0.66
 
 
ORBITAL ELEMENTS
 
 
Period (P)540.56y Periastron (T)1894.33y Semi-major axis (a)0.553a
Eccentricity (e)0.855 Inclination (i)33.4° Longitude of periastron (ω)96°
Node (Ω)165.1° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation1997
label rho theta
2000 0.636 58.2
2001 0.639 58.4
2002 0.641 58.6
2003 0.644 58.8
2004 0.647 59.0
2005 0.650 59.2
2006 0.653 59.4
2007 0.655 59.6
2008 0.658 59.9
2009 0.661 60.1
2010 0.663 60.3
2011 0.666 60.5
2012 0.669 60.7
2013 0.671 60.8
2014 0.674 61.0
2015 0.676 61.2
2016 0.679 61.4
2017 0.681 61.6
2018 0.684 61.8
2019 0.686 62.0
2020 0.689 62.2
2021 0.691 62.4
2022 0.694 62.6
2023 0.696 62.7
2024 0.698 62.9
2025 0.701 63.1
2026 0.703 63.3
2027 0.705 63.5
2028 0.708 63.6
2029 0.710 63.8
2030 0.712 64.0

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