21510+2911 A 889 Aa,Ab
21h 51m 02.11s +29° 10' 32.8" P.A. 323.00 sep 0.0 mag 9.80,10.20 Sp K0 dist. 56.4 pc (183.98 l.y.)
| Coord 2000 |
21510+2911 |
|
Discov num |
A 889 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
21 51 02.11 +29 10 32.8 |
|
| Date first |
2021 |
|
Date last |
2021 |
|
Obs |
1 |
|
| Pa first |
323 |
|
Pa last |
323 |
|
P.A. Now (θ) |
323° |
|
| Sep first |
0.0 |
|
Sep last |
0.032 |
|
Sep. Now (ρ) |
0.032" |
|
| Mag pri |
9.80 |
|
Mag sec |
10.20 |
|
delta mag (ΔM) |
0.4 |
|
Spectral class |
K0 (yellow-orange) |
|
| Pri motion ra |
+219 |
|
Sec motion ra |
|
|
| Pri motion dec |
+183 |
|
Sec motion dec |
|
|
| Notes |
N
(See Notes) |
|
Nature of this double is uncertain.
21510+2911 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
90051 |
21 51 02 +29 10 33 |
A 889 Aa,Ab |
2021 |
1 |
323 |
0.0 |
9.80 |
10.20 |
0.40 |
Y |
<=== |
| Show |
HD 207794 |
90051 |
21 51 02 +29 10 33 |
A 889 AB |
2021 |
26 |
15 |
0.2 |
9.23 |
10.48 |
1.25 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Pegasus |
|
SAO |
90051 |
|
HIP |
107849 |
|
Tycho2 |
2214-01676-1 |
|
| HD |
207794 |
|
ADS |
15378 |
|
BD |
BD+28 4210 |
|
Distance |
56.4 |
|
| Distance ly |
183.98 |
|
SUSPECTED ORBITAL ELEMENTS
| Identifier | 21510+2911 A 889 |
| coord_arcsec_2000 | 215102.11+291032.8 |
| Period (P) | 20.78y | |
Periastron (T) | 1954.28y | |
Semi-major axis (a) | 0.17a | |
| Eccentricity (e) | 0.35 | |
Inclination (i) | 43.7° | |
Longitude of periastron (ω) | 183.5° | |
| Node (Ω) | 40.6° | |
Notes | n | |
Reference | Baz1984b | |
| Equinox | | |
Last observation | 1981 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
344.5 |
0.135 |
| 2001 |
0.2 |
0.161 |
| 2002 |
11.6 |
0.184 |
| 2003 |
20.7 |
0.203 |
| 2004 |
28.3 |
0.218 |
| 2005 |
35.1 |
0.226 |
| 2006 |
41.6 |
0.229 |
| 2007 |
48.1 |
0.227 |
| 2008 |
54.9 |
0.219 |
| 2009 |
62.5 |
0.205 |
| 2010 |
71.2 |
0.187 |
| 2011 |
82.2 |
0.165 |
| 2012 |
96.7 |
0.141 |
| 2013 |
117.0 |
0.119 |
| 2014 |
144.7 |
0.105 |
| 2015 |
176.2 |
0.104 |
| 2016 |
205.9 |
0.110 |
| 2017 |
233.8 |
0.109 |
| 2018 |
264.5 |
0.101 |
| 2019 |
298.3 |
0.101 |
| 2020 |
327.6 |
0.117 |
| 2021 |
348.5 |
0.141 |
| 2022 |
3.0 |
0.166 |
| 2023 |
13.8 |
0.189 |
| 2024 |
22.4 |
0.207 |
| 2025 |
29.8 |
0.220 |
| 2026 |
36.6 |
0.227 |
| 2027 |
43.1 |
0.229 |
| 2028 |
49.6 |
0.226 |
| 2029 |
56.5 |
0.216 |
| 2030 |
64.3 |
0.202 |
|
|
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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