20527+4607 A 750
20h 52m 44.94s +46° 06' 47.7" P.A. 211.00 sep 0.1 mag 9.11,10.26 Sp G8V dist. 52.71 pc (171.94 l.y.)
Coord 2000 |
20527+4607 |
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Discov num |
A 750 |
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Comp |
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Coord arcsec 2000 |
20 52 44.94 +46 06 47.7 |
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Date first |
1904 |
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Date last |
2010 |
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Obs |
36 |
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Pa first |
250 |
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Pa last |
210.7 |
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P.A. Now (θ) |
262.3° |
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Sep first |
0.3 |
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Sep last |
0.133 |
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Sep. Now (ρ) |
0.31" |
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Mag pri |
9.11 |
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Mag sec |
10.26 |
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delta mag (ΔM) |
1.15 |
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Spectral class |
G8V (yellow) |
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Pri motion ra |
-033 |
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Sec motion ra |
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Pri motion dec |
-024 |
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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 |
Cygnus |
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HIP |
103055 |
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Tycho2 |
3575-02944-1 |
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Gaia DR2 |
2163403515533704320 |
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ADS |
14396 |
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BD |
BD+45 3310 |
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Distance |
52.71 |
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Distance ly |
171.94 |
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ORBITAL ELEMENTS
Period (P) | 30.45y | |
Periastron (T) | 2013.49y | |
Semi-major axis (a) | 0.212a | |
Eccentricity (e) | 0.723 | |
Inclination (i) | 128.7° | |
Longitude of periastron (ω) | 351.6° | |
Node (Ω) | 65.9° | |
Notes | n | |
Reference | Doc2013f | |
Equinox | 2000 | |
Last observation | 2009 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
248.2 |
0.362 |
2001 |
246.4 |
0.357 |
2002 |
244.5 |
0.350 |
2003 |
242.6 |
0.339 |
2004 |
240.5 |
0.326 |
2005 |
238.3 |
0.309 |
2006 |
235.7 |
0.289 |
2007 |
232.7 |
0.265 |
2008 |
229.1 |
0.236 |
2009 |
224.3 |
0.203 |
2010 |
217.5 |
0.165 |
2011 |
206.0 |
0.120 |
2012 |
179.7 |
0.073 |
2013 |
108.3 |
0.052 |
2014 |
37.9 |
0.059 |
2015 |
337.2 |
0.070 |
2016 |
305.4 |
0.105 |
2017 |
290.3 |
0.145 |
2018 |
281.6 |
0.181 |
2019 |
275.7 |
0.214 |
2020 |
271.3 |
0.243 |
2021 |
267.8 |
0.269 |
2022 |
264.9 |
0.291 |
2023 |
262.3 |
0.310 |
2024 |
260.1 |
0.326 |
2025 |
258.0 |
0.339 |
2026 |
256.1 |
0.349 |
2027 |
254.2 |
0.356 |
2028 |
252.4 |
0.361 |
2029 |
250.7 |
0.363 |
2030 |
248.9 |
0.363 |
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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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