21330+2043 STF 2804 AB (HD 205160)
21h 32m 58.30s +20° 42' 44.5" P.A. 359.00 sep 3.4 mag 7.70,8.04 Sp F5V dist. 56.53 pc (184.4 l.y.)
| Coord 2000 |
21330+2043 |
|
Discov num |
STF2804 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 32 58.30 +20 42 44.5 |
|
| Date first |
1825 |
|
Date last |
2022 |
|
Obs |
288 |
|
| Pa first |
312 |
|
Pa last |
359.4 |
|
P.A. Now (θ) |
359.4° |
|
| Sep first |
2.6 |
|
Sep last |
3.41 |
|
Sep. Now (ρ) |
3.41" |
|
| Mag pri |
7.70 |
|
Mag sec |
8.04 |
|
delta mag (ΔM) |
0.34 |
|
Spectral class |
F5V (yellow-white) |
|
| Pri motion ra |
+002 |
|
Sec motion ra |
-005 |
|
| Pri motion dec |
-041 |
|
Sec motion dec |
-025 |
|
| Notes |
N
C
(See Notes, Has orbit and linear solution) |
|
rPM=0.425
This double is physical.
21330+2043 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 205160 |
89792 |
21 32 58 +20 42 44 |
STF 2804 AB |
2022 |
288 |
359 |
3.4 |
7.70 |
8.04 |
0.34 |
Y |
<=== |
| Show |
|
|
21 32 58 +20 42 44 |
STF 2804 AC |
2013 |
11 |
103 |
97.1 |
7.70 |
12.51 |
4.81 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 205160 |
|
Constellation |
Pegasus |
|
SAO |
89792 |
|
HIP |
106395 |
|
| Tycho2 |
1676-00789-1 |
|
Gaia DR2 |
1787693589076214016 |
|
HD |
205160 |
|
GC |
30172 |
|
| ADS |
15076 |
|
BD |
BD+20 4955 |
|
Distance |
56.53 |
|
Distance ly |
184.4 |
|
ORBITAL ELEMENTS
| Period (P) | 2154.7082y | ± 965.8368 |
Periastron (T) | 1630.2031y | ± 525.0053 |
Semi-major axis (a) | 11.66817a | ± 6.10466 |
| Eccentricity (e) | 0.90363 | ± 0.1573 |
Inclination (i) | 77.8° | ± 9.205 |
Longitude of periastron (ω) | 107.981° | ± 29.087 |
| Node (Ω) | 84.414° | ± 43.766 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
355.3 |
3.240 |
| 2001 |
355.5 |
3.245 |
| 2002 |
355.7 |
3.250 |
| 2003 |
355.9 |
3.255 |
| 2004 |
356.1 |
3.260 |
| 2005 |
356.3 |
3.265 |
| 2006 |
356.4 |
3.270 |
| 2007 |
356.6 |
3.275 |
| 2008 |
356.8 |
3.280 |
| 2009 |
357.0 |
3.285 |
| 2010 |
357.2 |
3.290 |
| 2011 |
357.4 |
3.295 |
| 2012 |
357.6 |
3.300 |
| 2013 |
357.8 |
3.305 |
| 2014 |
358.0 |
3.310 |
| 2015 |
358.2 |
3.315 |
| 2016 |
358.3 |
3.320 |
| 2017 |
358.5 |
3.326 |
| 2018 |
358.7 |
3.331 |
| 2019 |
358.9 |
3.336 |
| 2020 |
359.1 |
3.341 |
| 2021 |
359.3 |
3.347 |
| 2022 |
359.5 |
3.352 |
| 2023 |
359.6 |
3.357 |
| 2024 |
359.8 |
3.363 |
| 2025 |
|
3.368 |
| 2026 |
0.2 |
3.373 |
| 2027 |
0.4 |
3.379 |
| 2028 |
0.5 |
3.384 |
| 2029 |
0.7 |
3.390 |
| 2030 |
0.9 |
3.395 |
|
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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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