20474+3629 STT 413 AB (Lam Cyg)
20h 47m 24.53s +36° 29' 26.7" P.A. 1.00 sep 0.9 mag 4.73,6.26 Sp B5Ve dist. 235.85 pc (769.34 l.y.)
| Coord 2000 |
20474+3629 |
|
Discov num |
STT 413 |
|
Comp |
AB |
|
Coord arcsec 2000 |
20 47 24.53 +36 29 26.7 |
|
| Date first |
1842 |
|
Date last |
2022 |
|
Obs |
425 |
|
| Pa first |
117 |
|
Pa last |
0.5 |
|
P.A. Now (θ) |
0.5° |
|
| Sep first |
0.7 |
|
Sep last |
0.935 |
|
Sep. Now (ρ) |
0.935" |
|
| Mag pri |
4.73 |
|
Mag sec |
6.26 |
|
delta mag (ΔM) |
1.53 |
|
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
| Name |
Lam Cyg |
|
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) | 800.7968y | ± 382.2193 |
Periastron (T) | 1836.8376y | ± 43.4714 |
Semi-major axis (a) | 0.96104a | ± 0.22777 |
| Eccentricity (e) | 0.44363 | ± 0.19446 |
Inclination (i) | 144.665° | ± 13.111 |
Longitude of periastron (ω) | 300.9° | ± 28.471 |
| Node (Ω) | 67.923° | ± 82.533 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2014 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
8.1 |
0.873 |
| 2001 |
7.7 |
0.875 |
| 2002 |
7.3 |
0.876 |
| 2003 |
6.9 |
0.878 |
| 2004 |
6.5 |
0.880 |
| 2005 |
6.1 |
0.881 |
| 2006 |
5.8 |
0.883 |
| 2007 |
5.4 |
0.885 |
| 2008 |
5.0 |
0.887 |
| 2009 |
4.6 |
0.888 |
| 2010 |
4.2 |
0.890 |
| 2011 |
3.8 |
0.892 |
| 2012 |
3.4 |
0.893 |
| 2013 |
3.1 |
0.895 |
| 2014 |
2.7 |
0.896 |
| 2015 |
2.3 |
0.898 |
| 2016 |
1.9 |
0.900 |
| 2017 |
1.6 |
0.901 |
| 2018 |
1.2 |
0.903 |
| 2019 |
0.8 |
0.905 |
| 2020 |
0.4 |
0.906 |
| 2021 |
0.1 |
0.908 |
| 2022 |
359.7 |
0.910 |
| 2023 |
359.3 |
0.911 |
| 2024 |
359.0 |
0.913 |
| 2025 |
358.6 |
0.915 |
| 2026 |
358.3 |
0.916 |
| 2027 |
357.9 |
0.918 |
| 2028 |
357.5 |
0.920 |
| 2029 |
357.2 |
0.921 |
| 2030 |
356.8 |
0.923 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
