22284-2553 WSI 137 Aa,Ab
22h 28m 23.42s -25° 54' 07.7" P.A. 14.00 sep 0.4 mag 13.20,13.20 dist. 20.41 pc (66.58 l.y.)
| Coord 2000 |
22284-2553 |
|
Discov num |
WSI 137 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
22 28 23.42 -25 54 07.7 |
|
| Date first |
2010 |
|
Date last |
2021 |
|
Obs |
14 |
|
| Pa first |
244 |
|
Pa last |
13.7 |
|
P.A. Now (θ) |
13.7° |
|
| Sep first |
0.2 |
|
Sep last |
0.424 |
|
Sep. Now (ρ) |
0.424" |
|
| Mag pri |
13.20 |
|
Mag sec |
13.20 |
|
delta mag (ΔM) |
0 |
|
Spectral class |
|
|
| Pri motion ra |
+017 |
|
Sec motion ra |
|
|
| Pri motion dec |
-340 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
22284-2553 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
22 28 23 -25 54 08 |
WSI 137 Aa,Ab |
2021 |
14 |
14 |
0.4 |
13.20 |
13.20 |
0.00 |
Y |
<=== |
| Show |
|
|
22 28 23 -25 54 08 |
LDS 2944 AB |
2020 |
12 |
218 |
3.1 |
12.46 |
13.49 |
1.03 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Piscis Austrinus |
|
HIP |
110922 |
|
Distance |
20.41 |
|
Distance ly |
66.58 |
|
ORBITAL ELEMENTS
| Period (P) | 38y | |
Periastron (T) | 2007.12y | ± 0.56 |
Semi-major axis (a) | 0.49a | ± 0.033 |
| Eccentricity (e) | 0.574 | ± 0.069 |
Inclination (i) | 72.1° | ± 1.5 |
Longitude of periastron (ω) | 135.3° | ± 4.7 |
| Node (Ω) | 39.8° | ± 2.1 |
Notes | n | |
Reference | Tok2021c | |
| Equinox | 2000 | |
Last observation | 2021 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
40.6 |
0.538 |
| 2001 |
42.8 |
0.488 |
| 2002 |
45.5 |
0.426 |
| 2003 |
49.3 |
0.350 |
| 2004 |
55.6 |
0.258 |
| 2005 |
70.1 |
0.152 |
| 2006 |
132.7 |
0.072 |
| 2007 |
199.8 |
0.144 |
| 2008 |
217.1 |
0.222 |
| 2009 |
227.0 |
0.250 |
| 2010 |
236.3 |
0.243 |
| 2011 |
246.9 |
0.220 |
| 2012 |
260.4 |
0.193 |
| 2013 |
277.9 |
0.172 |
| 2014 |
298.4 |
0.165 |
| 2015 |
318.4 |
0.177 |
| 2016 |
334.5 |
0.203 |
| 2017 |
346.5 |
0.238 |
| 2018 |
355.1 |
0.278 |
| 2019 |
1.6 |
0.320 |
| 2020 |
6.5 |
0.361 |
| 2021 |
10.5 |
0.402 |
| 2022 |
13.7 |
0.441 |
| 2023 |
16.4 |
0.477 |
| 2024 |
18.8 |
0.511 |
| 2025 |
20.8 |
0.542 |
| 2026 |
22.7 |
0.570 |
| 2027 |
24.4 |
0.594 |
| 2028 |
25.9 |
0.615 |
| 2029 |
27.4 |
0.631 |
| 2030 |
28.8 |
0.644 |
|
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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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