21047+0332 SE 3 BC
21h 04m 45.21s +03° 31' 57.6" P.A. 136.00 sep 0.7 mag 9.60,10.20 Sp G0
| Coord 2000 |
21047+0332 |
|
Discov num |
SE 3 |
|
Comp |
BC |
|
Coord arcsec 2000 |
21 04 45.21 +03 31 57.6 |
|
| Date first |
1856 |
|
Date last |
2017 |
|
Obs |
81 |
|
| Pa first |
127 |
|
Pa last |
136 |
|
P.A. Now (θ) |
136° |
|
| Sep first |
0.6 |
|
Sep last |
0.678 |
|
Sep. Now (ρ) |
0.678" |
|
| Mag pri |
9.60 |
|
Mag sec |
10.20 |
|
delta mag (ΔM) |
0.6 |
|
Spectral class |
G0 (yellow) |
|
| Pri motion ra |
+018 |
|
Sec motion ra |
+018 |
|
| Pri motion dec |
-003 |
|
Sec motion dec |
-003 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
21047+0332 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
126523 |
21 04 45 +03 32 02 |
SE 3 Aa,Ab |
1899 |
3 |
153 |
0.6 |
8.06 |
|
|
|
|
| Show |
|
126523 |
21 04 45 +03 32 02 |
STF 2749 A,BC |
2018 |
101 |
179 |
3.2 |
8.06 |
9.36 |
1.30 |
|
|
| Show |
|
126523 |
21 04 45 +03 32 02 |
STF 2749 AC |
2020 |
13 |
176 |
3.5 |
8.06 |
9.36 |
1.30 |
|
|
| Show |
HD 200660 |
126523 |
21 04 45 +03 32 02 |
SE 3 AD |
2016 |
6 |
78 |
114.3 |
8.00 |
9.59 |
1.59 |
|
|
| Show |
|
|
21 04 45 +03 31 58 |
SE 3 BC |
2017 |
81 |
136 |
0.7 |
9.60 |
10.20 |
0.60 |
Y |
<=== |
Quintuple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Equuleus |
|
Tycho2 |
0530-01815-2 |
|
Gaia DR2 |
1731257439633620992 |
|
ADS |
14602 |
|
ORBITAL ELEMENTS
| Period (P) | 654.22y | ± 99.48 |
Periastron (T) | 1971.46y | ± 10.02 |
Semi-major axis (a) | 1.342a | ± 0.173 |
| Eccentricity (e) | 0.424 | ± 0.078 |
Inclination (i) | 61.2° | ± 3.7 |
Longitude of periastron (ω) | 250.2° | ± 7.7 |
| Node (Ω) | 162.4° | ± 4.1 |
Notes | n | |
Reference | Hrt2009 | |
| Equinox | | |
Last observation | 2008 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
110.9 |
0.479 |
| 2001 |
112.7 |
0.489 |
| 2002 |
114.5 |
0.501 |
| 2003 |
116.2 |
0.512 |
| 2004 |
117.8 |
0.524 |
| 2005 |
119.3 |
0.535 |
| 2006 |
120.8 |
0.547 |
| 2007 |
122.2 |
0.560 |
| 2008 |
123.5 |
0.572 |
| 2009 |
124.8 |
0.584 |
| 2010 |
126.1 |
0.597 |
| 2011 |
127.3 |
0.609 |
| 2012 |
128.4 |
0.622 |
| 2013 |
129.5 |
0.635 |
| 2014 |
130.6 |
0.647 |
| 2015 |
131.6 |
0.660 |
| 2016 |
132.5 |
0.673 |
| 2017 |
133.5 |
0.685 |
| 2018 |
134.4 |
0.698 |
| 2019 |
135.3 |
0.710 |
| 2020 |
136.1 |
0.723 |
| 2021 |
136.9 |
0.736 |
| 2022 |
137.7 |
0.748 |
| 2023 |
138.5 |
0.760 |
| 2024 |
139.2 |
0.773 |
| 2025 |
139.9 |
0.785 |
| 2026 |
140.6 |
0.797 |
| 2027 |
141.3 |
0.809 |
| 2028 |
141.9 |
0.821 |
| 2029 |
142.6 |
0.833 |
| 2030 |
143.2 |
0.845 |
|
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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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