20550+2805 BU 367 AB
20h 55m 02.41s +28° 05' 25.6" P.A. 224.00 sep 0.1 mag 8.31,9.00 Sp G1V dist. 62.11 pc (202.6 l.y.)
| Coord 2000 |
20550+2805 |
|
Discov num |
BU 367 |
|
Comp |
AB |
|
Coord arcsec 2000 |
20 55 02.41 +28 05 25.6 |
|
| Date first |
1874 |
|
Date last |
2021 |
|
Obs |
131 |
|
| Pa first |
120 |
|
Pa last |
224.4 |
|
P.A. Now (θ) |
237.7° |
|
| Sep first |
0.4 |
|
Sep last |
0.146 |
|
Sep. Now (ρ) |
0.152" |
|
| Mag pri |
8.31 |
|
Mag sec |
9.00 |
|
delta mag (ΔM) |
0.69 |
|
Spectral class |
G1V (yellow) |
|
| Pri motion ra |
+109 |
|
Sec motion ra |
+109 |
|
| Pri motion dec |
-081 |
|
Sec motion dec |
-081 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
20550+2805 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
89278 |
20 55 02 +28 05 26 |
BU 367 AB |
2021 |
131 |
224 |
0.1 |
8.31 |
9.00 |
0.69 |
Y |
<=== |
| Show |
HD 199221 |
89278 |
20 55 02 +28 05 26 |
BU 367 AB,C |
2014 |
11 |
358 |
38.0 |
7.91 |
12.30 |
4.39 |
|
|
| Show |
|
89278 |
20 55 02 +28 05 26 |
BU 367 AB,D |
2014 |
9 |
67 |
19.6 |
7.91 |
15.00 |
7.09 |
|
|
| Show |
|
89278 |
20 55 02 +28 05 26 |
A 3109 AB,E |
2014 |
7 |
51 |
49.2 |
7.91 |
13.50 |
5.59 |
|
|
Quintuple system
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Vulpecula |
|
SAO |
89278 |
|
HIP |
103247 |
|
Tycho2 |
2179-00116-1 |
|
| Gaia DR2 |
1845833599295880704 |
|
HD |
199221 |
|
GC |
29194 |
|
ADS |
14424 |
|
| BD |
BD+27 3915 |
|
Distance |
62.11 |
|
Distance ly |
202.6 |
|
ORBITAL ELEMENTS
| Period (P) | 104.02y | ± 0.16 |
Periastron (T) | 1934.61y | ± 0.33 |
Semi-major axis (a) | 0.41a | ± 0.024 |
| Eccentricity (e) | 0.277 | ± 0.002 |
Inclination (i) | 68.2° | ± 0.4 |
Longitude of periastron (ω) | 185.8° | ± 1.4 |
| Node (Ω) | 119.9° | ± 0.5 |
Notes | n | |
Reference | Sca2021b | |
| Equinox | | |
Last observation | 2021 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
133.9 |
0.429 |
| 2001 |
135.1 |
0.416 |
| 2002 |
136.3 |
0.403 |
| 2003 |
137.6 |
0.390 |
| 2004 |
139.1 |
0.375 |
| 2005 |
140.6 |
0.361 |
| 2006 |
142.3 |
0.345 |
| 2007 |
144.1 |
0.329 |
| 2008 |
146.1 |
0.313 |
| 2009 |
148.3 |
0.297 |
| 2010 |
150.8 |
0.280 |
| 2011 |
153.7 |
0.263 |
| 2012 |
156.9 |
0.246 |
| 2013 |
160.6 |
0.229 |
| 2014 |
164.8 |
0.213 |
| 2015 |
169.8 |
0.197 |
| 2016 |
175.6 |
0.182 |
| 2017 |
182.3 |
0.169 |
| 2018 |
190.1 |
0.158 |
| 2019 |
198.9 |
0.150 |
| 2020 |
208.4 |
0.145 |
| 2021 |
218.4 |
0.144 |
| 2022 |
228.4 |
0.146 |
| 2023 |
237.7 |
0.152 |
| 2024 |
246.2 |
0.161 |
| 2025 |
253.7 |
0.172 |
| 2026 |
260.3 |
0.185 |
| 2027 |
265.9 |
0.199 |
| 2028 |
270.8 |
0.213 |
| 2029 |
275.1 |
0.227 |
| 2030 |
278.9 |
0.241 |
|
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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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