10121+2118 A  2146

 
 
10H 12M 05.05S +21 17' 54.6" P.A. 224.8 SEP 0.2 MAG 9.74,9.59 SP F8 DIST. 210.97 PC (688.18 L.Y.)
 
 
Coord 2000
10121+2118
Discov num
A  2146
Comp
Coord arcsec 2000
10 12 05.05 +21 17 54.6
Date first
1910
Date last
2008
Obs
32
Pa first
180
Pa last
162
P.A. Now (θ)
224.8°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.2"
Mag pri
9.74
Mag sec
9.59
delta mag (ΔM)
0.15
Spectral class
F8 (yellow-white)
Pri motion ra
-049
Sec motion ra
Pri motion dec
-057
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Leo
SAO
81226
HIP
49970
Tycho2
1425-00805-1
HD
88417
ADS
7677
BD
BD+22 2190
Distance
210.97
Distance ly
688.18
last precise pa
162.1
last precise sep
0.237
 
 
ORBITAL ELEMENTS
 
 
Period (P)97y Periastron (T)2002y Semi-major axis (a)0.224a
Eccentricity (e)0.255 Inclination (i)33° Longitude of periastron (ω)110°
Node (Ω)33.1° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.141 131.6
2001 0.142 139.1
2002 0.143 146.6
2003 0.146 153.8
2004 0.149 160.7
2005 0.153 167.4
2006 0.157 173.6
2007 0.162 179.5
2008 0.167 185.1
2009 0.171 190.4
2010 0.176 195.4
2011 0.181 200.2
2012 0.185 204.7
2013 0.189 209.0
2014 0.193 213.2
2015 0.196 217.2
2016 0.199 221.0
2017 0.202 224.8
2018 0.205 228.4
2019 0.207 232.0
2020 0.209 235.5
2021 0.211 238.9
2022 0.212 242.3
2023 0.214 245.6
2024 0.215 248.9
2025 0.216 252.1
2026 0.217 255.3
2027 0.218 258.5
2028 0.219 261.7
2029 0.220 264.8
2030 0.221 267.9

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