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 |
|
Discov num |
A 750 |
|
Comp |
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Coord arcsec 2000 |
20 52 44.94 +46 06 47.7 |
|
| Date first |
1904 |
|
Date last |
2010 |
|
Obs |
36 |
|
| Pa first |
250 |
|
Pa last |
210.7 |
|
P.A. Now (θ) |
262.3° |
|
| Sep first |
0.3 |
|
Sep last |
0.133 |
|
Sep. Now (ρ) |
0.31" |
|
| Mag pri |
9.11 |
|
Mag sec |
10.26 |
|
delta mag (ΔM) |
1.15 |
|
Spectral class |
G8V (yellow) |
|
| Pri motion ra |
-033 |
|
Sec motion ra |
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|
| Pri motion dec |
-024 |
|
Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
HIP |
103055 |
|
Tycho2 |
3575-02944-1 |
|
Gaia DR2 |
2163403515533704320 |
|
| ADS |
14396 |
|
BD |
BD+45 3310 |
|
Distance |
52.71 |
|
Distance ly |
171.94 |
|
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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