21289+1105 STF 2799 AB (HD 204509)
21h 28m 52.79s +11° 05' 05.2" P.A. 259.00 sep 1.9 mag 7.37,7.44 Sp F4V dist. 105.04 pc (342.64 l.y.)
| Coord 2000 |
21289+1105 |
|
Discov num |
STF2799 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 28 52.79 +11 05 05.2 |
|
| Date first |
1825 |
|
Date last |
2021 |
|
Obs |
422 |
|
| Pa first |
338 |
|
Pa last |
258.9 |
|
P.A. Now (θ) |
258.9° |
|
| Sep first |
1.2 |
|
Sep last |
1.93 |
|
Sep. Now (ρ) |
1.93" |
|
| Mag pri |
7.37 |
|
Mag sec |
7.44 |
|
delta mag (ΔM) |
0.07 |
|
Spectral class |
F4V (yellow-white) |
|
| Pri motion ra |
+071 |
|
Sec motion ra |
+071 |
|
| Pri motion dec |
+014 |
|
Sec motion dec |
+014 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
21289+1105 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 204509 |
107165 |
21 28 53 +11 05 05 |
STF 2799 AB |
2021 |
422 |
259 |
1.9 |
7.37 |
7.44 |
0.07 |
Y |
<=== |
| Show |
|
107165 |
21 28 53 +11 05 05 |
STF 2799 AC |
2016 |
19 |
331 |
135.9 |
7.37 |
10.20 |
2.83 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 204509 |
|
Constellation |
Pegasus |
|
SAO |
107165 |
|
HIP |
106053 |
|
| Tycho2 |
1123-02302-1 |
|
Gaia DR2 |
1745718697602229504 |
|
HD |
204509 |
|
GC |
30071 |
|
| ADS |
15007 |
|
BD |
BD+10 4554 |
|
Distance |
105.04 |
|
Distance ly |
342.64 |
|
ORBITAL ELEMENTS
| Period (P) | 1108.405y | ± 490.9262 |
Periastron (T) | 2102.8302y | ± 26.8144 |
Semi-major axis (a) | 4.47939a | ± 2.01757 |
| Eccentricity (e) | 0.76621 | ± 0.16709 |
Inclination (i) | 102.311° | ± 6.021 |
Longitude of periastron (ω) | 247.669° | ± 17.699 |
| Node (Ω) | 61.281° | ± 3.993 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
263.5 |
1.826 |
| 2001 |
263.2 |
1.830 |
| 2002 |
262.9 |
1.834 |
| 2003 |
262.7 |
1.838 |
| 2004 |
262.4 |
1.842 |
| 2005 |
262.1 |
1.846 |
| 2006 |
261.9 |
1.850 |
| 2007 |
261.6 |
1.853 |
| 2008 |
261.4 |
1.857 |
| 2009 |
261.1 |
1.860 |
| 2010 |
260.8 |
1.863 |
| 2011 |
260.6 |
1.867 |
| 2012 |
260.3 |
1.870 |
| 2013 |
260.1 |
1.873 |
| 2014 |
259.8 |
1.876 |
| 2015 |
259.6 |
1.878 |
| 2016 |
259.3 |
1.881 |
| 2017 |
259.1 |
1.884 |
| 2018 |
258.8 |
1.886 |
| 2019 |
258.6 |
1.888 |
| 2020 |
258.3 |
1.890 |
| 2021 |
258.1 |
1.892 |
| 2022 |
257.8 |
1.894 |
| 2023 |
257.6 |
1.896 |
| 2024 |
257.3 |
1.898 |
| 2025 |
257.1 |
1.899 |
| 2026 |
256.8 |
1.900 |
| 2027 |
256.6 |
1.902 |
| 2028 |
256.3 |
1.902 |
| 2029 |
256.1 |
1.903 |
| 2030 |
255.8 |
1.904 |
|
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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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