22579+1337 HU 989 (HD 217075)
22h 57m 56.31s +13° 36' 42.0" P.A. 68.00 sep 0.2 mag 7.67,9.52 Sp F2 dist. 86.21 pc (281.22 l.y.)
| Coord 2000 |
22579+1337 |
|
Discov num |
HU 989 |
|
Comp |
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Coord arcsec 2000 |
22 57 56.31 +13 36 42.0 |
|
| Date first |
1904 |
|
Date last |
2013 |
|
Obs |
21 |
|
| Pa first |
76 |
|
Pa last |
68.2 |
|
P.A. Now (θ) |
68.2° |
|
| Sep first |
0.4 |
|
Sep last |
0.205 |
|
Sep. Now (ρ) |
0.205" |
|
| Mag pri |
7.67 |
|
Mag sec |
9.52 |
|
delta mag (ΔM) |
1.85 |
|
Spectral class |
F2 (yellow-white) |
|
| Pri motion ra |
+080 |
|
Sec motion ra |
+080 |
|
| Pri motion dec |
+045 |
|
Sec motion dec |
+045 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 217075 |
|
Constellation |
Pegasus |
|
SAO |
108292 |
|
HIP |
113398 |
|
| Tycho2 |
1159-00938-1 |
|
Gaia DR2 |
2815903227819173632 |
|
HD |
217075 |
|
ADS |
16403 |
|
| BD |
BD+12 4919 |
|
Distance |
86.21 |
|
Distance ly |
281.22 |
|
ORBITAL ELEMENTS
| Period (P) | 45y | |
Periastron (T) | 1975y | |
Semi-major axis (a) | 0.21a | |
| Eccentricity (e) | 0.95 | |
Inclination (i) | 115° | |
Longitude of periastron (ω) | 196° | |
| Node (Ω) | 79.5° | |
Notes | n | |
Reference | Hei1998 | |
| Equinox | | |
Last observation | | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
71.8 |
0.391 |
| 2001 |
71.5 |
0.386 |
| 2002 |
71.2 |
0.381 |
| 2003 |
70.9 |
0.375 |
| 2004 |
70.6 |
0.368 |
| 2005 |
70.2 |
0.359 |
| 2006 |
69.8 |
0.349 |
| 2007 |
69.4 |
0.339 |
| 2008 |
69.0 |
0.326 |
| 2009 |
68.6 |
0.313 |
| 2010 |
68.1 |
0.298 |
| 2011 |
67.5 |
0.281 |
| 2012 |
66.9 |
0.263 |
| 2013 |
66.1 |
0.243 |
| 2014 |
65.3 |
0.221 |
| 2015 |
64.2 |
0.196 |
| 2016 |
62.8 |
0.168 |
| 2017 |
60.8 |
0.136 |
| 2018 |
57.3 |
0.099 |
| 2019 |
48.8 |
0.054 |
| 2020 |
252.6 |
0.010 |
| 2021 |
89.5 |
0.075 |
| 2022 |
84.6 |
0.125 |
| 2023 |
82.4 |
0.164 |
| 2024 |
80.9 |
0.197 |
| 2025 |
79.9 |
0.225 |
| 2026 |
79.1 |
0.249 |
| 2027 |
78.4 |
0.271 |
| 2028 |
77.8 |
0.290 |
| 2029 |
77.2 |
0.307 |
| 2030 |
76.8 |
0.322 |
|
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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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