20157+4339 A 2095 AB
20h 15m 40.26s +43° 38' 59.6" P.A. 333.00 sep 0.2 mag 9.06,9.82 Sp F5 dist. 255.75 pc (834.26 l.y.)
| Coord 2000 |
20157+4339 |
|
Discov num |
A 2095 |
|
Comp |
AB |
|
Coord arcsec 2000 |
20 15 40.26 +43 38 59.6 |
|
| Date first |
1909 |
|
Date last |
2012 |
|
Obs |
24 |
|
| Pa first |
326 |
|
Pa last |
332.7 |
|
P.A. Now (θ) |
332.7° |
|
| Sep first |
0.2 |
|
Sep last |
0.241 |
|
Sep. Now (ρ) |
0.241" |
|
| Mag pri |
9.06 |
|
Mag sec |
9.82 |
|
delta mag (ΔM) |
0.76 |
|
Spectral class |
F5 (yellow-white) |
|
| Pri motion ra |
+013 |
|
Sec motion ra |
|
|
| Pri motion dec |
-012 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
20157+4339 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
49388 |
20 15 40 +43 38 60 |
A 2095 AB |
2012 |
24 |
333 |
0.2 |
9.06 |
9.82 |
0.76 |
Y |
<=== |
| Show |
HD 192911 |
49388 |
20 15 40 +43 38 60 |
STF 2659 AB,C |
2019 |
36 |
311 |
2.7 |
8.61 |
10.82 |
2.21 |
|
|
| Show |
|
49388 |
20 15 40 +43 38 60 |
STF 2659 AB,D |
2019 |
27 |
251 |
20.5 |
8.61 |
9.83 |
1.22 |
|
|
| Show |
|
|
20 15 39 +43 38 54 |
FOX 39 DE |
2016 |
6 |
135 |
1.4 |
9.83 |
13.10 |
3.27 |
|
|
| Show |
|
|
20 15 39 +43 38 54 |
A 2095 DF |
2015 |
13 |
48 |
7.6 |
9.83 |
13.80 |
3.97 |
|
|
Sextuple system
7 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
SAO |
49388 |
|
HIP |
99862 |
|
Tycho2 |
3163-01043-1 |
|
| Gaia DR2 |
2080915335711861760 |
|
HD |
192911 |
|
GC |
28164 |
|
ADS |
13611 |
|
| BD |
BD+43 3543 |
|
Distance |
255.75 |
|
Distance ly |
834.26 |
|
ORBITAL ELEMENTS
| Period (P) | 148.58y | |
Periastron (T) | 2049.9y | |
Semi-major axis (a) | 0.345a | |
| Eccentricity (e) | 0.758 | |
Inclination (i) | 94.5° | |
Longitude of periastron (ω) | 101.6° | |
| Node (Ω) | 147.5° | |
Notes | n | |
Reference | Lin2012c | |
| Equinox | 2000 | |
Last observation | 2009 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
157.2 |
0.238 |
| 2001 |
156.9 |
0.242 |
| 2002 |
156.7 |
0.245 |
| 2003 |
156.4 |
0.248 |
| 2004 |
156.2 |
0.251 |
| 2005 |
155.9 |
0.255 |
| 2006 |
155.7 |
0.258 |
| 2007 |
155.5 |
0.260 |
| 2008 |
155.3 |
0.263 |
| 2009 |
155.1 |
0.266 |
| 2010 |
154.9 |
0.268 |
| 2011 |
154.7 |
0.271 |
| 2012 |
154.5 |
0.273 |
| 2013 |
154.3 |
0.275 |
| 2014 |
154.1 |
0.277 |
| 2015 |
153.9 |
0.278 |
| 2016 |
153.7 |
0.280 |
| 2017 |
153.5 |
0.281 |
| 2018 |
153.3 |
0.282 |
| 2019 |
153.1 |
0.283 |
| 2020 |
153.0 |
0.284 |
| 2021 |
152.8 |
0.285 |
| 2022 |
152.6 |
0.285 |
| 2023 |
152.4 |
0.285 |
| 2024 |
152.2 |
0.284 |
| 2025 |
152.0 |
0.284 |
| 2026 |
151.9 |
0.283 |
| 2027 |
151.7 |
0.282 |
| 2028 |
151.5 |
0.280 |
| 2029 |
151.3 |
0.278 |
| 2030 |
151.1 |
0.275 |
|
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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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