20201+2334 BKO 641
20h 20m 08.99s +23° 33' 37.6" P.A. 98.00 sep 8.0 mag 12.20,14.00
Coord 2000 |
20201+2334 |
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Discov num |
BKO 641 |
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Comp |
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Coord arcsec 2000 |
20 20 08.99 +23 33 37.6 |
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Date first |
2000 |
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Date last |
2015 |
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Obs |
8 |
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Pa first |
99 |
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Pa last |
98.4 |
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P.A. Now (θ) |
98.4° |
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Sep first |
7.8 |
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Sep last |
8.049 |
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Sep. Now (ρ) |
8.049" |
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Mag pri |
12.20 |
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Mag sec |
14.00 |
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delta mag (ΔM) |
1.8 |
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Spectral class |
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Pri motion ra |
-042 |
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Sec motion ra |
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Pri motion dec |
+008 |
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Sec motion dec |
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Notes |
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Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Vulpecula |
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Gaia DR2 |
1831857500844790912 |
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SUSPECTED ORBITAL ELEMENTS
Identifier | 20201+2338 |
coord_arcsec_2000 | 202003.65+233817.2 |
Period (P) | 832.0012d (2.28y) | ± 50.1881 |
Periastron (T) | 48574.1094d (1991.867y) | ± 50.8726 |
Semi-major axis (a) | 14.95m | ± 1.45 |
Eccentricity (e) | 0.3255 | ± 0.1375 |
Inclination (i) | 36.29° | ± 10.76 |
Longitude of periastron (ω) | 146.62° | ± 38.79 |
Node (Ω) | 97.88° | ± 21.03 |
Notes | n | |
Reference | HIP1997d | |
Equinox | | |
Last observation | 1991 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000-01-01 |
81.8 |
0.019 |
2001-01-01 |
256.1 |
0.010 |
2002-01-01 |
60.5 |
0.018 |
2003-01-01 |
167.3 |
0.010 |
2004-01-01 |
33.3 |
0.015 |
2005-01-01 |
119.4 |
0.015 |
2006-01-01 |
352.7 |
0.012 |
2007-01-01 |
94.2 |
0.019 |
2008-01-01 |
297.1 |
0.011 |
2009-01-01 |
73.6 |
0.019 |
2010-01-01 |
220.7 |
0.009 |
2011-01-01 |
50.7 |
0.017 |
2012-01-01 |
142.8 |
0.012 |
2013-01-01 |
19.0 |
0.014 |
2014-01-01 |
108.1 |
0.017 |
2015-01-01 |
331.8 |
0.012 |
2016-01-01 |
85.8 |
0.019 |
2017-01-01 |
270.7 |
0.010 |
2018-01-01 |
65.0 |
0.018 |
2019-01-01 |
183.0 |
0.009 |
2020-01-01 |
39.4 |
0.016 |
2021-01-01 |
125.9 |
0.014 |
2022-01-01 |
2.0 |
0.013 |
2023-01-01 |
98.5 |
0.018 |
2024-01-01 |
308.9 |
0.011 |
2025-01-01 |
77.6 |
0.019 |
2026-01-01 |
238.8 |
0.009 |
2027-01-01 |
55.6 |
0.017 |
2028-01-01 |
153.5 |
0.011 |
2029-01-01 |
26.2 |
0.014 |
2030-01-01 |
113.3 |
0.016 |
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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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