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 |
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Discov num |
A 1092 |
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Comp |
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Coord arcsec 2000 |
12 55 22.52 +69 53 14.9 |
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Date first |
1905 |
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Date last |
2014 |
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Obs |
23 |
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Pa first |
157 |
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Pa last |
169.4 |
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P.A. Now (θ) |
169.4° |
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Sep first |
0.3 |
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Sep last |
0.333 |
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Sep. Now (ρ) |
0.333" |
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Mag pri |
9.73 |
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Mag sec |
9.88 |
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delta mag (ΔM) |
0.15 |
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Spectral class |
G5 (yellow) |
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Pri motion ra |
-043 |
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Sec motion ra |
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Pri motion dec |
-016 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Draco |
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HIP |
63071 |
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Tycho2 |
4401-01239-1 |
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ADS |
8705 |
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BD |
BD+70 720 |
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Distance |
72.62 |
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Distance ly |
236.89 |
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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 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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