23020+4800 A 194 (HD 217712)
23h 01m 57.12s +47° 59' 54.8" P.A. 285.00 sep 0.2 mag 8.68,8.83 Sp A0 dist. 189.75 pc (618.96 l.y.)
Coord 2000 |
23020+4800 |
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Discov num |
A 194 |
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Comp |
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Coord arcsec 2000 |
23 01 57.12 +47 59 54.8 |
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Date first |
1900 |
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Date last |
2014 |
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Obs |
33 |
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Pa first |
98 |
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Pa last |
284.8 |
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P.A. Now (θ) |
168.8° |
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Sep first |
0.2 |
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Sep last |
0.179 |
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Sep. Now (ρ) |
0.02" |
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Mag pri |
8.68 |
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Mag sec |
8.83 |
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delta mag (ΔM) |
0.15 |
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Spectral class |
A0 (white) |
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Pri motion ra |
+022 |
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Sec motion ra |
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Pri motion dec |
+013 |
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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
Name |
HD 217712 |
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Constellation |
Andromeda |
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SAO |
52611 |
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HIP |
113729 |
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Tycho2 |
3626-01263-1 |
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Gaia DR2 |
1984537678333679616 |
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HD |
217712 |
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ADS |
16457 |
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BD |
BD+47 4017 |
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Distance |
189.75 |
|
Distance ly |
618.96 |
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ORBITAL ELEMENTS
Period (P) | 104.28y | |
Periastron (T) | 1990.26y | |
Semi-major axis (a) | 0.206a | |
Eccentricity (e) | 0.079 | |
Inclination (i) | 94.7° | |
Longitude of periastron (ω) | 151.6° | |
Node (Ω) | 108° | |
Notes | n | |
Reference | Doc2017e | |
Equinox | 2000 | |
Last observation | 2008 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
287.1 |
0.190 |
2001 |
286.8 |
0.187 |
2002 |
286.4 |
0.184 |
2003 |
286.1 |
0.180 |
2004 |
285.7 |
0.176 |
2005 |
285.3 |
0.171 |
2006 |
284.9 |
0.164 |
2007 |
284.4 |
0.158 |
2008 |
283.9 |
0.150 |
2009 |
283.3 |
0.142 |
2010 |
282.7 |
0.134 |
2011 |
282.0 |
0.125 |
2012 |
281.2 |
0.116 |
2013 |
280.2 |
0.106 |
2014 |
279.0 |
0.095 |
2015 |
277.5 |
0.085 |
2016 |
275.6 |
0.074 |
2017 |
273.1 |
0.063 |
2018 |
269.5 |
0.052 |
2019 |
264.0 |
0.042 |
2020 |
254.7 |
0.031 |
2021 |
237.4 |
0.022 |
2022 |
205.3 |
0.018 |
2023 |
168.8 |
0.020 |
2024 |
146.8 |
0.028 |
2025 |
135.4 |
0.038 |
2026 |
128.9 |
0.049 |
2027 |
124.7 |
0.060 |
2028 |
121.9 |
0.070 |
2029 |
119.8 |
0.081 |
2030 |
118.2 |
0.092 |
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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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