20474+3629 MCA 63 Aa,Ab
20h 47m 24.53s +36° 29' 26.7" P.A. 46.00 sep 0.1 mag 5.40,5.80 Sp B5Ve dist. 235.85 pc (769.34 l.y.)
| Coord 2000 |
20474+3629 |
|
Discov num |
MCA 63 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
20 47 24.53 +36 29 26.7 |
|
| Date first |
1978 |
|
Date last |
2012 |
|
Obs |
24 |
|
| Pa first |
24 |
|
Pa last |
46.2 |
|
P.A. Now (θ) |
55.5° |
|
| Sep first |
0.0 |
|
Sep last |
0.055 |
|
Sep. Now (ρ) |
0.052" |
|
| Mag pri |
5.40 |
|
Mag sec |
5.80 |
|
delta mag (ΔM) |
0.4 |
|
Spectral class |
B5Ve (blue-white) |
|
| Pri motion ra |
+015 |
|
Sec motion ra |
|
|
| Pri motion dec |
-008 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
20474+3629 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
70505 |
20 47 25 +36 29 27 |
MCA 63 Aa,Ab |
2012 |
24 |
46 |
0.1 |
5.40 |
5.80 |
0.40 |
Y |
<=== |
| Show |
Lam Cyg |
70505 |
20 47 25 +36 29 27 |
STT 413 AB |
2022 |
425 |
1 |
0.9 |
4.73 |
6.26 |
1.53 |
Y |
|
| Show |
|
70505 |
20 47 25 +36 29 27 |
S 765 AC |
2018 |
28 |
106 |
82.8 |
4.76 |
9.65 |
4.89 |
|
|
| Show |
|
70505 |
20 47 25 +36 29 27 |
FYM 126 AF |
2012 |
3 |
119 |
52.0 |
4.76 |
14.00 |
9.24 |
|
|
| Show |
|
|
20 47 31 +36 29 04 |
FYM 126 CD |
2015 |
6 |
112 |
9.4 |
9.65 |
14.00 |
4.35 |
|
|
| Show |
|
|
20 47 31 +36 29 04 |
FYM 126 CE |
2012 |
3 |
207 |
40.1 |
9.65 |
13.60 |
3.95 |
|
|
Septuple system
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
SAO |
70505 |
|
HIP |
102589 |
|
Tycho2 |
2699-03425-1 |
|
| Gaia DR2 |
1870779903225039872 |
|
HD |
198183 |
|
HR |
7963 |
|
GC |
28994 |
|
| ADS |
14296 |
|
BD |
BD+35 4267 |
|
Bayer |
Lambda Cygni |
|
Bayer name |
Lam Cyg |
|
| Flamsteed |
54 Cygni |
|
Flamsteed name |
54 Cyg |
|
Distance |
235.85 |
|
Distance ly |
769.34 |
|
| Bayer greek |
λ Cyg |
|
ORBITAL ELEMENTS
| Period (P) | 11.63y | |
Periastron (T) | 1982.19y | |
Semi-major axis (a) | 0.048a | |
| Eccentricity (e) | 0.524 | |
Inclination (i) | 135° | |
Longitude of periastron (ω) | 272° | |
| Node (Ω) | 150° | |
Notes | n | |
Reference | Bag1992 | |
| Equinox | | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
51.3 |
0.052 |
| 2001 |
35.4 |
0.052 |
| 2002 |
19.3 |
0.051 |
| 2003 |
2.0 |
0.048 |
| 2004 |
340.4 |
0.040 |
| 2005 |
295.8 |
0.022 |
| 2006 |
173.1 |
0.025 |
| 2007 |
134.0 |
0.041 |
| 2008 |
112.4 |
0.047 |
| 2009 |
94.4 |
0.050 |
| 2010 |
77.7 |
0.051 |
| 2011 |
61.4 |
0.052 |
| 2012 |
45.4 |
0.052 |
| 2013 |
29.5 |
0.052 |
| 2014 |
13.1 |
0.050 |
| 2015 |
354.8 |
0.046 |
| 2016 |
329.3 |
0.035 |
| 2017 |
250.2 |
0.016 |
| 2018 |
153.9 |
0.033 |
| 2019 |
125.2 |
0.044 |
| 2020 |
105.5 |
0.049 |
| 2021 |
88.1 |
0.051 |
| 2022 |
71.6 |
0.051 |
| 2023 |
55.5 |
0.052 |
| 2024 |
39.6 |
0.052 |
| 2025 |
23.5 |
0.051 |
| 2026 |
6.7 |
0.049 |
| 2027 |
346.8 |
0.043 |
| 2028 |
313.4 |
0.028 |
| 2029 |
195.8 |
0.020 |
| 2030 |
141.2 |
0.038 |
|
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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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