21041+0300 WSI 6 AB (HD 200580)
21h 04m 07.38s +02° 59' 40.1" P.A. 53.00 sep 0.1 mag 7.50,9.50 Sp F9V+K0V dist. 51.89 pc (169.27 l.y.)
| Coord 2000 |
21041+0300 |
|
Discov num |
WSI 6 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 04 07.38 +02 59 40.1 |
|
| Date first |
1999 |
|
Date last |
2021 |
|
Obs |
35 |
|
| Pa first |
334 |
|
Pa last |
52.5 |
|
P.A. Now (θ) |
79.8° |
|
| Sep first |
0.1 |
|
Sep last |
0.107 |
|
Sep. Now (ρ) |
0.151" |
|
| Mag pri |
7.50 |
|
Mag sec |
9.50 |
|
delta mag (ΔM) |
2 |
|
Spectral class |
F9V+K0V (yellow-white/yellow-orange) |
|
| Pri motion ra |
-274 |
|
Sec motion ra |
|
|
| Pri motion dec |
-372 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
21041+0300 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
126509 |
21 04 07 +02 59 40 |
DSG 6 Aa,Ab |
2015 |
8 |
155 |
0.0 |
7.60 |
9.10 |
1.50 |
Y |
|
| Show |
HD 200580 |
126509 |
21 04 07 +02 59 40 |
WSI 6 AB |
2021 |
35 |
53 |
0.1 |
7.50 |
9.50 |
2.00 |
Y |
<=== |
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 200580 |
|
Constellation |
Equuleus |
|
SAO |
126509 |
|
HIP |
103987 |
|
| Tycho2 |
0530-00708-1 |
|
HD |
200580 |
|
GC |
29422 |
|
BD |
BD+02 4295 |
|
| Distance |
51.89 |
|
Distance ly |
169.27 |
|
ORBITAL ELEMENTS
| Period (P) | 19.205y | ± 0.08 |
Periastron (T) | 2006.259y | ± 3.6 |
Semi-major axis (a) | 0.2195a | ± 0.0013 |
| Eccentricity (e) | 0.1743 | ± 0.0083 |
Inclination (i) | 65.1° | ± 1 |
Longitude of periastron (ω) | 17.6° | ± 2.6 |
| Node (Ω) | 102.8° | ± 0.5 |
Notes | n | |
Reference | Tok2017a | |
| Equinox | 2000 | |
Last observation | 2016 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
324.0 |
0.139 |
| 2001 |
350.6 |
0.104 |
| 2002 |
30.7 |
0.096 |
| 2003 |
63.6 |
0.122 |
| 2004 |
83.0 |
0.157 |
| 2005 |
96.0 |
0.180 |
| 2006 |
107.3 |
0.179 |
| 2007 |
120.7 |
0.152 |
| 2008 |
142.7 |
0.111 |
| 2009 |
185.1 |
0.085 |
| 2010 |
229.8 |
0.107 |
| 2011 |
252.8 |
0.153 |
| 2012 |
265.1 |
0.198 |
| 2013 |
273.2 |
0.231 |
| 2014 |
279.6 |
0.251 |
| 2015 |
285.3 |
0.255 |
| 2016 |
291.3 |
0.246 |
| 2017 |
298.0 |
0.223 |
| 2018 |
306.9 |
0.188 |
| 2019 |
320.3 |
0.148 |
| 2020 |
343.8 |
0.110 |
| 2021 |
22.2 |
0.094 |
| 2022 |
58.2 |
0.115 |
| 2023 |
79.8 |
0.151 |
| 2024 |
93.5 |
0.177 |
| 2025 |
104.9 |
0.181 |
| 2026 |
117.6 |
0.160 |
| 2027 |
136.9 |
0.120 |
| 2028 |
174.6 |
0.087 |
| 2029 |
222.5 |
0.099 |
| 2030 |
249.3 |
0.144 |
|
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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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