22570+2441 COU 542 Aa,Ab
22h 57m 02.47s +24° 40' 55.9" P.A. 121.00 sep 0.1 mag 9.29,9.93 Sp K0 dist. 88.97 pc (290.22 l.y.)
| Coord 2000 |
22570+2441 |
|
Discov num |
COU 542 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
22 57 02.47 +24 40 55.9 |
|
| Date first |
1970 |
|
Date last |
2014 |
|
Obs |
91 |
|
| Pa first |
352 |
|
Pa last |
121.2 |
|
P.A. Now (θ) |
292° |
|
| Sep first |
0.2 |
|
Sep last |
0.122 |
|
Sep. Now (ρ) |
0.151" |
|
| Mag pri |
9.29 |
|
Mag sec |
9.93 |
|
delta mag (ΔM) |
0.64 |
|
Spectral class |
K0 (yellow-orange) |
|
| Pri motion ra |
-002 |
|
Sec motion ra |
|
|
| Pri motion dec |
+006 |
|
Sec motion dec |
|
|
| Notes |
N
O
W
(See Notes, Orbital solution, ) |
|
This double is physical.
22570+2441 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
90889 |
22 57 02 +24 40 56 |
COU 542 Aa,Ab |
2014 |
91 |
121 |
0.1 |
9.29 |
9.93 |
0.64 |
Y |
<=== |
| Show |
HD 216963 |
90889 |
22 57 02 +24 40 56 |
POU 5764 AB |
2015 |
8 |
13 |
13.2 |
8.76 |
11.80 |
3.04 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Pegasus |
|
SAO |
90889 |
|
HIP |
113323 |
|
Tycho2 |
2238-01361-1 |
|
| Gaia DR2 |
2843229252866208000 |
|
HD |
216963 |
|
BD |
BD+23 4640 |
|
Distance |
88.97 |
|
| Distance ly |
290.22 |
|
ORBITAL ELEMENTS
| Period (P) | 30.95y | |
Periastron (T) | 1987.56y | |
Semi-major axis (a) | 0.182a | |
| Eccentricity (e) | 0.391 | |
Inclination (i) | 21.7° | |
Longitude of periastron (ω) | 174.9° | |
| Node (Ω) | 19.8° | |
Notes | n | |
Reference | Doc2016b | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
359.0 |
0.244 |
| 2001 |
4.5 |
0.249 |
| 2002 |
9.7 |
0.252 |
| 2003 |
14.9 |
0.253 |
| 2004 |
20.0 |
0.252 |
| 2005 |
25.2 |
0.250 |
| 2006 |
30.6 |
0.246 |
| 2007 |
36.2 |
0.240 |
| 2008 |
42.1 |
0.232 |
| 2009 |
48.5 |
0.222 |
| 2010 |
55.5 |
0.211 |
| 2011 |
63.5 |
0.197 |
| 2012 |
72.6 |
0.183 |
| 2013 |
83.3 |
0.167 |
| 2014 |
96.4 |
0.151 |
| 2015 |
112.3 |
0.136 |
| 2016 |
132.0 |
0.124 |
| 2017 |
155.3 |
0.115 |
| 2018 |
181.4 |
0.111 |
| 2019 |
208.1 |
0.112 |
| 2020 |
233.7 |
0.116 |
| 2021 |
256.5 |
0.125 |
| 2022 |
276.0 |
0.137 |
| 2023 |
292.0 |
0.151 |
| 2024 |
305.2 |
0.166 |
| 2025 |
316.3 |
0.180 |
| 2026 |
325.6 |
0.195 |
| 2027 |
333.8 |
0.208 |
| 2028 |
341.0 |
0.219 |
| 2029 |
347.6 |
0.229 |
| 2030 |
353.6 |
0.237 |
|
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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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