12554+6953 A 1092
12h 55m 22.52s +69° 53' 14.9" P.A. 169.00 sep 0.3 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 |
2014 |
|
Obs |
23 |
|
| Pa first |
157 |
|
Pa last |
169.4 |
|
P.A. Now (θ) |
169.4° |
|
| Sep first |
0.3 |
|
Sep last |
0.333 |
|
Sep. Now (ρ) |
0.333" |
|
| 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
| Constellation |
Draco |
|
HIP |
63071 |
|
Tycho2 |
4401-01239-1 |
|
ADS |
8705 |
|
| BD |
BD+70 720 |
|
Distance |
72.62 |
|
Distance ly |
236.89 |
|
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° | |
Notes | n | |
Reference | Baz1959 | |
| Equinox | | |
Last observation | 1958 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
296.5 |
0.087 |
| 2001 |
274.0 |
0.100 |
| 2002 |
256.5 |
0.112 |
| 2003 |
242.6 |
0.125 |
| 2004 |
231.0 |
0.137 |
| 2005 |
221.4 |
0.149 |
| 2006 |
213.2 |
0.161 |
| 2007 |
206.2 |
0.173 |
| 2008 |
200.1 |
0.185 |
| 2009 |
194.6 |
0.196 |
| 2010 |
189.8 |
0.208 |
| 2011 |
185.5 |
0.218 |
| 2012 |
181.6 |
0.229 |
| 2013 |
178.0 |
0.239 |
| 2014 |
174.7 |
0.249 |
| 2015 |
171.6 |
0.258 |
| 2016 |
168.8 |
0.266 |
| 2017 |
166.1 |
0.274 |
| 2018 |
163.6 |
0.282 |
| 2019 |
161.2 |
0.289 |
| 2020 |
158.9 |
0.296 |
| 2021 |
156.7 |
0.302 |
| 2022 |
154.6 |
0.308 |
| 2023 |
152.5 |
0.313 |
| 2024 |
150.6 |
0.317 |
| 2025 |
148.6 |
0.321 |
| 2026 |
146.7 |
0.324 |
| 2027 |
144.9 |
0.327 |
| 2028 |
143.1 |
0.329 |
| 2029 |
141.3 |
0.331 |
| 2030 |
139.5 |
0.332 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
