20462+1554 WSI 110 Aa,Ab
20h 46m 13.31s +15° 54' 26.4" P.A. 343.00 sep 0.0 mag 7.90,8.90 Sp K0 dist. 4000 pc (13048 l.y.)
| Coord 2000 |
20462+1554 |
|
Discov num |
WSI 110 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
20 46 13.31 +15 54 26.4 |
|
| Date first |
2008 |
|
Date last |
2021 |
|
Obs |
7 |
|
| Pa first |
328 |
|
Pa last |
343.1 |
|
P.A. Now (θ) |
147.2° |
|
| Sep first |
0.1 |
|
Sep last |
0.05 |
|
Sep. Now (ρ) |
0.072" |
|
| Mag pri |
7.90 |
|
Mag sec |
8.90 |
|
delta mag (ΔM) |
1 |
|
Spectral class |
K0 (yellow-orange) |
|
| Pri motion ra |
+095 |
|
Sec motion ra |
|
|
| Pri motion dec |
+067 |
|
Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
20462+1554 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
106466 |
20 46 13 +15 54 26 |
WSI 110 Aa,Ab |
2021 |
7 |
343 |
0.0 |
7.90 |
8.90 |
1.00 |
Y |
<=== |
| Show |
OR Del |
106466 |
20 46 13 +15 54 26 |
STF 2725 AB |
2019 |
287 |
12 |
6.2 |
7.54 |
8.20 |
0.66 |
Y |
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Delphinus |
|
SAO |
106466 |
|
HIP |
102065 |
|
Tycho2 |
1634-03058-1 |
|
| Gaia DR2 |
1762987494080694016 |
|
HD |
197193 |
|
ADS |
14270 |
|
BD |
BD+33 3987 |
|
| Distance |
4000 |
|
Distance ly |
13048 |
|
ORBITAL ELEMENTS
| Period (P) | 4.871y | ± 0 |
Periastron (T) | 2003.25y | ± 0.01 |
Semi-major axis (a) | 0.0979a | ± 0.0015 |
| Eccentricity (e) | 0.254 | ± 0.006 |
Inclination (i) | 78.5° | ± 1.5 |
Longitude of periastron (ω) | 344° | ± 1.5 |
| Node (Ω) | 143.6° | ± 1 |
Notes | n | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
307.8 |
0.068 |
| 2001 |
322.1 |
0.121 |
| 2002 |
334.5 |
0.077 |
| 2003 |
131.3 |
0.052 |
| 2004 |
169.2 |
0.038 |
| 2005 |
311.0 |
0.080 |
| 2006 |
323.3 |
0.121 |
| 2007 |
338.1 |
0.064 |
| 2008 |
136.6 |
0.063 |
| 2009 |
186.9 |
0.027 |
| 2010 |
313.5 |
0.090 |
| 2011 |
324.5 |
0.120 |
| 2012 |
343.7 |
0.049 |
| 2013 |
140.5 |
0.071 |
| 2014 |
222.7 |
0.020 |
| 2015 |
315.4 |
0.099 |
| 2016 |
325.7 |
0.117 |
| 2017 |
353.9 |
0.035 |
| 2018 |
143.9 |
0.074 |
| 2019 |
264.2 |
0.023 |
| 2020 |
317.1 |
0.106 |
| 2021 |
327.1 |
0.111 |
| 2022 |
18.3 |
0.021 |
| 2023 |
147.2 |
0.072 |
| 2024 |
286.9 |
0.034 |
| 2025 |
318.6 |
0.112 |
| 2026 |
328.6 |
0.105 |
| 2027 |
72.1 |
0.018 |
| 2028 |
150.8 |
0.067 |
| 2029 |
298.1 |
0.047 |
| 2030 |
319.9 |
0.117 |
|
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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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