22557+1547 HU 987
22h 55m 43.52s +15° 46' 45.5" P.A. 75.00 sep 1.2 mag 9.23,9.73 Sp G2.3V+G8V dist. 72.99 pc (238.09 l.y.)
| Coord 2000 |
22557+1547 |
|
Discov num |
HU 987 |
|
Comp |
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Coord arcsec 2000 |
22 55 43.52 +15 46 45.5 |
|
| Date first |
1904 |
|
Date last |
2021 |
|
Obs |
108 |
|
| Pa first |
247 |
|
Pa last |
75.2 |
|
P.A. Now (θ) |
73.8° |
|
| Sep first |
0.7 |
|
Sep last |
1.226 |
|
Sep. Now (ρ) |
1.219" |
|
| Mag pri |
9.23 |
|
Mag sec |
9.73 |
|
delta mag (ΔM) |
0.5 |
|
Spectral class |
G2.3V+G8V (yellow/yellow) |
|
| Pri motion ra |
+122 |
|
Sec motion ra |
+122 |
|
| Pri motion dec |
+025 |
|
Sec motion dec |
+025 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Pegasus |
|
HIP |
113220 |
|
Tycho2 |
1698-00324-1 |
|
Gaia DR2 |
2828462055790178688 |
|
| ADS |
16373 |
|
BD |
BD+15 4729 |
|
Distance |
72.99 |
|
Distance ly |
238.09 |
|
ORBITAL ELEMENTS
| Period (P) | 212.7825y | ± 55.3477 |
Periastron (T) | 1891.3757y | ± 12.2395 |
Semi-major axis (a) | 0.98401a | ± 0.12071 |
| Eccentricity (e) | 0.46857 | ± 0.17326 |
Inclination (i) | 107.821° | ± 5.001 |
Longitude of periastron (ω) | 132.08° | ± 26.758 |
| Node (Ω) | 63.844° | ± 3.094 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
81.6 |
1.047 |
| 2001 |
81.2 |
1.057 |
| 2002 |
80.9 |
1.068 |
| 2003 |
80.5 |
1.078 |
| 2004 |
80.1 |
1.087 |
| 2005 |
79.7 |
1.097 |
| 2006 |
79.4 |
1.106 |
| 2007 |
79.0 |
1.115 |
| 2008 |
78.6 |
1.124 |
| 2009 |
78.3 |
1.132 |
| 2010 |
77.9 |
1.140 |
| 2011 |
77.6 |
1.148 |
| 2012 |
77.3 |
1.156 |
| 2013 |
76.9 |
1.163 |
| 2014 |
76.6 |
1.170 |
| 2015 |
76.3 |
1.177 |
| 2016 |
76.0 |
1.183 |
| 2017 |
75.7 |
1.189 |
| 2018 |
75.4 |
1.195 |
| 2019 |
75.0 |
1.201 |
| 2020 |
74.7 |
1.206 |
| 2021 |
74.4 |
1.211 |
| 2022 |
74.1 |
1.215 |
| 2023 |
73.8 |
1.219 |
| 2024 |
73.5 |
1.223 |
| 2025 |
73.2 |
1.226 |
| 2026 |
73.0 |
1.229 |
| 2027 |
72.7 |
1.232 |
| 2028 |
72.4 |
1.234 |
| 2029 |
72.1 |
1.236 |
| 2030 |
71.8 |
1.238 |
|
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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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