21243+0343 A 2288 (HD 203789)
21h 24m 19.75s +03° 43' 00.8" P.A. 227.00 sep 0.4 mag 9.97,10.27 Sp G5 dist. 132.45 pc (432.05 l.y.)
Coord 2000 |
21243+0343 |
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Discov num |
A 2288 |
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Comp |
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Coord arcsec 2000 |
21 24 19.75 +03 43 00.8 |
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Date first |
1910 |
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Date last |
2014 |
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Obs |
45 |
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Pa first |
215 |
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Pa last |
226.9 |
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P.A. Now (θ) |
218.5° |
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Sep first |
0.3 |
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Sep last |
0.38 |
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Sep. Now (ρ) |
0.37" |
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Mag pri |
9.97 |
|
Mag sec |
10.27 |
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delta mag (ΔM) |
0.3 |
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Spectral class |
G5 (yellow) |
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Pri motion ra |
+039 |
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Sec motion ra |
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Pri motion dec |
-085 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 203789 |
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Constellation |
Equuleus |
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SAO |
126772 |
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HIP |
105682 |
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Tycho2 |
0533-01480-1 |
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Gaia DR2 |
2692829771720784640 |
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HD |
203789 |
|
GC |
29967 |
|
ADS |
14942 |
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BD |
BD+03 4562 |
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Distance |
132.45 |
|
Distance ly |
432.05 |
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ORBITAL ELEMENTS
Period (P) | 122.72y | ± 2.29 |
Periastron (T) | 1950.41y | ± 0.5 |
Semi-major axis (a) | 0.3a | ± 0.007 |
Eccentricity (e) | 0.659 | ± 0.011 |
Inclination (i) | 139.4° | ± 1.8 |
Longitude of periastron (ω) | 86.1° | ± 3.3 |
Node (Ω) | 135.4° | ± 4.3 |
Notes | | |
Reference | Tok2015c | |
Equinox | 2000 | |
Last observation | 2014 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
243.0 |
0.375 |
2001 |
241.9 |
0.376 |
2002 |
240.8 |
0.377 |
2003 |
239.8 |
0.377 |
2004 |
238.7 |
0.378 |
2005 |
237.6 |
0.378 |
2006 |
236.6 |
0.379 |
2007 |
235.5 |
0.379 |
2008 |
234.5 |
0.379 |
2009 |
233.4 |
0.379 |
2010 |
232.4 |
0.379 |
2011 |
231.3 |
0.379 |
2012 |
230.3 |
0.378 |
2013 |
229.2 |
0.378 |
2014 |
228.2 |
0.378 |
2015 |
227.1 |
0.377 |
2016 |
226.1 |
0.377 |
2017 |
225.0 |
0.376 |
2018 |
223.9 |
0.375 |
2019 |
222.9 |
0.374 |
2020 |
221.8 |
0.373 |
2021 |
220.7 |
0.372 |
2022 |
219.6 |
0.371 |
2023 |
218.5 |
0.370 |
2024 |
217.4 |
0.369 |
2025 |
216.3 |
0.367 |
2026 |
215.2 |
0.366 |
2027 |
214.0 |
0.364 |
2028 |
212.9 |
0.362 |
2029 |
211.7 |
0.361 |
2030 |
210.6 |
0.359 |
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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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