12554+6953 A  1092

 
 
12h 55m 22.52s +69 53' 14.9" P.A. 166.1 sep 0.27 mag 9.73,9.88 Sp G5 dist. 72.62 pc (236.89 l.y.)
 
 
Coord 2000
12554+6953
Discov num
A  1092
Comp
Coord arcsec 2000
12 55 22.52 +69 53 14.9
Date first
1905
Date last
2004
Obs
21
Pa first
157
Pa last
213
P.A. Now (θ)
166.1°
Sep first
0.3
Sep last
0.2
Sep. Now (ρ)
0.27"
Mag pri
9.73
Mag sec
9.88
delta mag (ΔM)
0.15
Spectral class
G5 (yellow)
Pri motion ra
-043
Sec motion ra
Pri motion dec
-016
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
213
Precise sep
0.192
Constellation
Draco
SAO
7701
HIP
63071
Tycho2
4401-01239-1
ADS
8705
BD
BD+70 720
Distance
72.62
Distance ly
236.89
last precise pa
213
last precise sep
0.192
 
 
ORBITAL ELEMENTS
 
 
Period (P)58y Periastron (T)1941.1y Semi-major axis (a)0.22a
Eccentricity (e)0.62 Inclination (i)146.3° Longitude of periastron (ω)136.8°
Node (Ω)104.9° Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation1958
label rho theta
2000 0.087 296.5
2001 0.100 274.0
2002 0.112 256.5
2003 0.125 242.6
2004 0.137 231.0
2005 0.149 221.4
2006 0.161 213.2
2007 0.173 206.2
2008 0.185 200.1
2009 0.196 194.6
2010 0.208 189.8
2011 0.218 185.5
2012 0.229 181.6
2013 0.239 178.0
2014 0.249 174.7
2015 0.258 171.6
2016 0.266 168.8
2017 0.274 166.1
2018 0.282 163.6
2019 0.289 161.2
2020 0.296 158.9
2021 0.302 156.7
2022 0.308 154.6
2023 0.313 152.5
2024 0.317 150.6
2025 0.321 148.6
2026 0.324 146.7
2027 0.327 144.9
2028 0.329 143.1
2029 0.331 141.3
2030 0.332 139.5

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

grafico orbita





wds12554%2B6953a.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
12554+6953 A 1092 2004 21 213 0.2 9.73 9.88 G5 NO 125522.52+695314.9

If you need more information about this double, apply for a data request form to the WDS.