20598+4731 MCA 65 Aa,Ab
20h 59m 49.55s +47° 31' 15.4" P.A. 334.00 sep 0.1 mag 4.80,7.64 Sp B1ne dist. 434.78 pc (1418.25 l.y.)
| Coord 2000 |
20598+4731 |
|
Discov num |
MCA 65 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
20 59 49.55 +47 31 15.4 |
|
| Date first |
1981 |
|
Date last |
2015 |
|
Obs |
29 |
|
| Pa first |
58 |
|
Pa last |
333.9 |
|
P.A. Now (θ) |
333.9° |
|
| Sep first |
0.2 |
|
Sep last |
0.128 |
|
Sep. Now (ρ) |
0.128" |
|
| Mag pri |
4.80 |
|
Mag sec |
7.64 |
|
delta mag (ΔM) |
2.84 |
|
Spectral class |
B1ne (blue-white) |
|
| Pri motion ra |
+007 |
|
Sec motion ra |
|
|
| Pri motion dec |
+003 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
20598+4731 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
50335 |
20 59 50 +47 31 15 |
MCA 65 Aa,Ab |
2015 |
29 |
334 |
0.1 |
4.80 |
7.64 |
2.84 |
Y |
<=== |
| Show |
59 Cyg |
50335 |
20 59 50 +47 31 15 |
STF 2743 AB |
2012 |
33 |
353 |
21.0 |
4.74 |
9.43 |
4.69 |
|
|
| Show |
|
50335 |
20 59 50 +47 31 15 |
STF 2743 AC |
2012 |
18 |
140 |
26.5 |
4.74 |
11.62 |
6.88 |
|
|
| Show |
|
50335 |
20 59 50 +47 31 15 |
STF 2743 AD |
2012 |
5 |
222 |
39.3 |
4.74 |
11.20 |
6.46 |
|
|
| Show |
|
50335 |
20 59 50 +47 31 15 |
STF 2743 AE |
2003 |
5 |
59 |
70.6 |
4.74 |
12.02 |
7.28 |
|
|
Sextuple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Var name |
V832 Cyg |
|
Constellation |
Cygnus |
|
SAO |
50335 |
|
HIP |
103632 |
|
| Tycho2 |
3579-04461-1 |
|
Gaia DR2 |
2163949388695291136 |
|
HD |
200120 |
|
HR |
8047 |
|
| GC |
29327 |
|
ADS |
14526 |
|
BD |
BD+46 3133 |
|
Flamsteed |
59 Cygni |
|
| Flamsteed name |
59 Cyg |
|
FK5 |
1551 |
|
Distance |
434.78 |
|
Distance ly |
1418.25 |
|
ORBITAL ELEMENTS
| Period (P) | 161.5y | |
Periastron (T) | 2024.3y | |
Semi-major axis (a) | 0.208a | |
| Eccentricity (e) | 0.261 | |
Inclination (i) | 145.8° | |
Longitude of periastron (ω) | 265.5° | |
| Node (Ω) | 205.2° | |
Notes | n | |
Reference | Msn2011f | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
23.0 |
0.188 |
| 2001 |
20.8 |
0.185 |
| 2002 |
18.5 |
0.183 |
| 2003 |
16.1 |
0.180 |
| 2004 |
13.7 |
0.178 |
| 2005 |
11.3 |
0.175 |
| 2006 |
8.7 |
0.172 |
| 2007 |
6.0 |
0.169 |
| 2008 |
3.3 |
0.166 |
| 2009 |
0.5 |
0.163 |
| 2010 |
357.5 |
0.160 |
| 2011 |
354.4 |
0.157 |
| 2012 |
351.2 |
0.154 |
| 2013 |
347.9 |
0.150 |
| 2014 |
344.4 |
0.147 |
| 2015 |
340.8 |
0.144 |
| 2016 |
337.0 |
0.142 |
| 2017 |
333.1 |
0.139 |
| 2018 |
329.0 |
0.136 |
| 2019 |
324.8 |
0.134 |
| 2020 |
320.5 |
0.132 |
| 2021 |
316.0 |
0.130 |
| 2022 |
311.4 |
0.129 |
| 2023 |
306.8 |
0.128 |
| 2024 |
302.1 |
0.127 |
| 2025 |
297.3 |
0.127 |
| 2026 |
292.6 |
0.127 |
| 2027 |
287.8 |
0.128 |
| 2028 |
283.1 |
0.129 |
| 2029 |
278.6 |
0.130 |
| 2030 |
274.1 |
0.132 |
|
|
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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