21506+2216 HO 467 AB (HD 207731)
21h 50m 37.14s +22° 15' 31.0" P.A. 221.00 sep 2.6 mag 8.10,10.30 Sp K2
| Coord 2000 |
21506+2216 |
|
Discov num |
HO 467 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 50 37.14 +22 15 31.0 |
|
| Date first |
1893 |
|
Date last |
2010 |
|
Obs |
32 |
|
| Pa first |
182 |
|
Pa last |
220.5 |
|
P.A. Now (θ) |
220.5° |
|
| Sep first |
1.0 |
|
Sep last |
2.579 |
|
Sep. Now (ρ) |
2.579" |
|
| Mag pri |
8.10 |
|
Mag sec |
10.30 |
|
delta mag (ΔM) |
2.2 |
|
Spectral class |
K2 (yellow-orange) |
|
| Pri motion ra |
+012 |
|
Sec motion ra |
|
|
| Pri motion dec |
-023 |
|
Sec motion dec |
|
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
21506+2216 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 207731 |
90048 |
21 50 37 +22 15 31 |
HO 467 AB |
2010 |
32 |
221 |
2.6 |
8.10 |
10.30 |
2.20 |
Y |
<=== |
| Show |
|
90048 |
21 50 37 +22 15 31 |
HO 467 AC |
2015 |
6 |
334 |
41.8 |
9.05 |
13.61 |
4.56 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 207731 |
|
Constellation |
Pegasus |
|
SAO |
90048 |
|
Tycho2 |
1678-01108-1 |
|
| Gaia DR2 |
1793424926578179456 |
|
HD |
207731 |
|
ADS |
15373 |
|
ORBITAL ELEMENTS
| Period (P) | 1227.7677y | ± 585.1002 |
Periastron (T) | 1855.4771y | ± 204.5652 |
Semi-major axis (a) | 6.74276a | ± 4.0034 |
| Eccentricity (e) | 0.95965 | ± 0.15996 |
Inclination (i) | 71.298° | ± 14.707 |
Longitude of periastron (ω) | 291.314° | ± 39.392 |
| Node (Ω) | 110.174° | ± 56.84 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2010 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
220.7 |
2.558 |
| 2001 |
220.8 |
2.571 |
| 2002 |
221.0 |
2.583 |
| 2003 |
221.2 |
2.596 |
| 2004 |
221.4 |
2.609 |
| 2005 |
221.6 |
2.621 |
| 2006 |
221.7 |
2.634 |
| 2007 |
221.9 |
2.646 |
| 2008 |
222.1 |
2.659 |
| 2009 |
222.2 |
2.672 |
| 2010 |
222.4 |
2.684 |
| 2011 |
222.6 |
2.697 |
| 2012 |
222.7 |
2.709 |
| 2013 |
222.9 |
2.721 |
| 2014 |
223.1 |
2.734 |
| 2015 |
223.2 |
2.746 |
| 2016 |
223.4 |
2.759 |
| 2017 |
223.5 |
2.771 |
| 2018 |
223.7 |
2.783 |
| 2019 |
223.9 |
2.796 |
| 2020 |
224.0 |
2.808 |
| 2021 |
224.2 |
2.820 |
| 2022 |
224.3 |
2.832 |
| 2023 |
224.5 |
2.845 |
| 2024 |
224.6 |
2.857 |
| 2025 |
224.8 |
2.869 |
| 2026 |
224.9 |
2.881 |
| 2027 |
225.0 |
2.893 |
| 2028 |
225.2 |
2.905 |
| 2029 |
225.3 |
2.917 |
| 2030 |
225.5 |
2.930 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
