20210+1028 J 838
20h 21m 00.67s +10° 28' 21.0" P.A. 119.00 sep 6.9 mag 12.50,12.60
Coord 2000 |
20210+1028 |
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Discov num |
J 838 |
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Comp |
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Coord arcsec 2000 |
20 21 00.67 +10 28 21.0 |
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Date first |
1912 |
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Date last |
2018 |
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Obs |
35 |
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Pa first |
51 |
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Pa last |
118.5 |
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P.A. Now (θ) |
118.5° |
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Sep first |
2.9 |
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Sep last |
6.882 |
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Sep. Now (ρ) |
6.882" |
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Mag pri |
12.50 |
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Mag sec |
12.60 |
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delta mag (ΔM) |
0.1 |
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Spectral class |
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Pri motion ra |
-018 |
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Sec motion ra |
+040 |
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Pri motion dec |
-007 |
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Sec motion dec |
-026 |
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Notes |
N
C
(See Notes, Has orbit and linear solution) |
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rPM=1.279
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Delphinus |
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Tycho2 |
1078-00744-1 |
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Gaia DR2 |
1753567320839173888 |
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HD |
357347 |
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ADS |
13734 |
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ORBITAL ELEMENTS
Period (P) | 239.84y | |
Periastron (T) | 1967.51y | |
Semi-major axis (a) | 7.451a | |
Eccentricity (e) | 0.784 | |
Inclination (i) | 77.6° | |
Longitude of periastron (ω) | 258.1° | |
Node (Ω) | 103° | |
Notes | n | |
Reference | Ole2002b | |
Equinox | 2000 | |
Last observation | 1995 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
113.9 |
5.925 |
2001 |
114.2 |
5.961 |
2002 |
114.5 |
5.995 |
2003 |
114.8 |
6.025 |
2004 |
115.1 |
6.052 |
2005 |
115.4 |
6.077 |
2006 |
115.7 |
6.099 |
2007 |
116.0 |
6.118 |
2008 |
116.3 |
6.135 |
2009 |
116.6 |
6.150 |
2010 |
116.9 |
6.163 |
2011 |
117.2 |
6.173 |
2012 |
117.5 |
6.181 |
2013 |
117.8 |
6.188 |
2014 |
118.1 |
6.192 |
2015 |
118.4 |
6.195 |
2016 |
118.7 |
6.195 |
2017 |
119.0 |
6.195 |
2018 |
119.3 |
6.192 |
2019 |
119.5 |
6.188 |
2020 |
119.8 |
6.182 |
2021 |
120.1 |
6.175 |
2022 |
120.4 |
6.167 |
2023 |
120.7 |
6.157 |
2024 |
121.0 |
6.145 |
2025 |
121.3 |
6.133 |
2026 |
121.6 |
6.119 |
2027 |
121.9 |
6.104 |
2028 |
122.2 |
6.088 |
2029 |
122.5 |
6.070 |
2030 |
122.8 |
6.052 |
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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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