21041+0300 DSG 6 Aa,Ab
21h 04m 07.38s +02° 59' 40.1" P.A. 155.00 sep 0.0 mag 7.60,9.10 Sp F9V+G9V dist. 51.89 pc (169.27 l.y.)
Coord 2000 |
21041+0300 |
|
Discov num |
DSG 6 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
21 04 07.38 +02 59 40.1 |
|
Date first |
2012 |
|
Date last |
2015 |
|
Obs |
8 |
|
Pa first |
225 |
|
Pa last |
155.3 |
|
P.A. Now (θ) |
155.3° |
|
Sep first |
0.0 |
|
Sep last |
0.009 |
|
Sep. Now (ρ) |
0.009" |
|
Mag pri |
7.60 |
|
Mag sec |
9.10 |
|
delta mag (ΔM) |
1.5 |
|
Spectral class |
F9V+G9V (yellow-white/yellow) |
|
Pri motion ra |
-274 |
|
Sec motion ra |
|
|
Pri motion dec |
-372 |
|
Sec motion dec |
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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
Constellation |
Equuleus |
|
SAO |
126509 |
|
HIP |
103987 |
|
Tycho2 |
0530-00708-1 |
|
HD |
200580 |
|
BD |
BD+02 4295 |
|
Distance |
51.89 |
|
Distance ly |
169.27 |
|
ORBITAL ELEMENTS
Period (P) | 1.03483y | ± 0.00008 |
Periastron (T) | 2014.6223y | ± 0.0089 |
Semi-major axis (a) | 0.0284a | |
Eccentricity (e) | 0.0934 | ± 0.004 |
Inclination (i) | 68.6° | ± 13.7 |
Longitude of periastron (ω) | 124.9° | ± 3.1 |
Node (Ω) | 97.3° | ± 12.5 |
Notes | n | |
Reference | Tok2017a | |
Equinox | 2000 | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
141.7 |
0.013 |
2001 |
125.9 |
0.017 |
2002 |
116.3 |
0.021 |
2003 |
109.7 |
0.025 |
2004 |
104.5 |
0.028 |
2005 |
100.1 |
0.029 |
2006 |
96.1 |
0.030 |
2007 |
92.0 |
0.029 |
2008 |
87.8 |
0.028 |
2009 |
83.0 |
0.026 |
2010 |
77.2 |
0.023 |
2011 |
69.6 |
0.020 |
2012 |
58.9 |
0.017 |
2013 |
42.7 |
0.013 |
2014 |
18.7 |
0.011 |
2015 |
350.5 |
0.011 |
2016 |
327.3 |
0.014 |
2017 |
311.6 |
0.017 |
2018 |
301.1 |
0.020 |
2019 |
293.5 |
0.023 |
2020 |
287.5 |
0.025 |
2021 |
282.2 |
0.027 |
2022 |
277.3 |
0.027 |
2023 |
272.1 |
0.026 |
2024 |
266.2 |
0.023 |
2025 |
258.7 |
0.020 |
2026 |
247.6 |
0.016 |
2027 |
228.9 |
0.012 |
2028 |
196.9 |
0.010 |
2029 |
160.1 |
0.011 |
2030 |
136.2 |
0.014 |
|
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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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