20462+1554 STF 2725 AB (OR Del)
20h 46m 13.31s +15° 54' 26.4" P.A. 12.00 sep 6.2 mag 7.54,8.20 Sp K0 dist. 36.46 pc (118.93 l.y.)
| Coord 2000 |
20462+1554 |
|
Discov num |
STF2725 |
|
Comp |
AB |
|
Coord arcsec 2000 |
20 46 13.31 +15 54 26.4 |
|
| Date first |
1821 |
|
Date last |
2019 |
|
Obs |
287 |
|
| Pa first |
356 |
|
Pa last |
11.6 |
|
P.A. Now (θ) |
11.6° |
|
| Sep first |
4.1 |
|
Sep last |
6.204 |
|
Sep. Now (ρ) |
6.204" |
|
| Mag pri |
7.54 |
|
Mag sec |
8.20 |
|
delta mag (ΔM) |
0.66 |
|
Spectral class |
K0 (yellow-orange) |
|
| Pri motion ra |
+087 |
|
Sec motion ra |
+096 |
|
| Pri motion dec |
+065 |
|
Sec motion dec |
+072 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.095 (< 0.3, Physical double)
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
| Var name |
OR Del |
|
Constellation |
Delphinus |
|
SAO |
106466 |
|
HIP |
102490 |
|
| Tycho2 |
1634-03058-1 |
|
Gaia DR2 |
1762987494080694016 |
|
HD |
197913 |
|
GC |
28953 |
|
| ADS |
14270 |
|
BD |
BD+15 4251 |
|
Distance |
36.46 |
|
Distance ly |
118.93 |
|
ORBITAL ELEMENTS
| Period (P) | 2107.9177y | ± 759.8293 |
Periastron (T) | 1703.6193y | ± 508.3354 |
Semi-major axis (a) | 10.81181a | ± 5.3979 |
| Eccentricity (e) | 0.94506 | ± 0.18354 |
Inclination (i) | 65.666° | ± 18.971 |
Longitude of periastron (ω) | 92.31° | ± 20.563 |
| Node (Ω) | 129.316° | ± 103.149 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
10.4 |
6.044 |
| 2001 |
10.4 |
6.051 |
| 2002 |
10.5 |
6.059 |
| 2003 |
10.6 |
6.067 |
| 2004 |
10.7 |
6.075 |
| 2005 |
10.7 |
6.082 |
| 2006 |
10.8 |
6.090 |
| 2007 |
10.9 |
6.098 |
| 2008 |
11.0 |
6.105 |
| 2009 |
11.0 |
6.113 |
| 2010 |
11.1 |
6.120 |
| 2011 |
11.2 |
6.128 |
| 2012 |
11.2 |
6.136 |
| 2013 |
11.3 |
6.143 |
| 2014 |
11.4 |
6.151 |
| 2015 |
11.5 |
6.158 |
| 2016 |
11.5 |
6.166 |
| 2017 |
11.6 |
6.173 |
| 2018 |
11.7 |
6.181 |
| 2019 |
11.7 |
6.188 |
| 2020 |
11.8 |
6.195 |
| 2021 |
11.9 |
6.203 |
| 2022 |
12.0 |
6.210 |
| 2023 |
12.0 |
6.218 |
| 2024 |
12.1 |
6.225 |
| 2025 |
12.2 |
6.232 |
| 2026 |
12.2 |
6.240 |
| 2027 |
12.3 |
6.247 |
| 2028 |
12.4 |
6.254 |
| 2029 |
12.4 |
6.261 |
| 2030 |
12.5 |
6.269 |
|
|
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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