22003-2330 I 674 (HD 208955)
22h 00m 19.88s -23° 30' 03.2" P.A. 244.00 sep 0.3 mag 9.70,9.90 Sp G3V
Coord 2000 |
22003-2330 |
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Discov num |
I 674 |
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Comp |
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Coord arcsec 2000 |
22 00 19.88 -23 30 03.2 |
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Date first |
1907 |
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Date last |
2020 |
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Obs |
15 |
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Pa first |
260 |
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Pa last |
243.5 |
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P.A. Now (θ) |
245.8° |
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Sep first |
0.4 |
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Sep last |
0.259 |
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Sep. Now (ρ) |
0.289" |
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Mag pri |
9.70 |
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Mag sec |
9.90 |
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delta mag (ΔM) |
0.2 |
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Spectral class |
G3V (yellow) |
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Pri motion ra |
+039 |
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Sec motion ra |
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Pri motion dec |
-057 |
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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 208955 |
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Constellation |
Aquarius |
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SAO |
190815 |
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Tycho2 |
6954-01126-1 |
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Gaia DR2 |
6813564190280657664 |
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HD |
208955 |
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ADS |
15526 |
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ORBITAL ELEMENTS
Period (P) | 301y | ± 57 |
Periastron (T) | 2007.87y | ± 0.11 |
Semi-major axis (a) | 0.5a | ± 0.059 |
Eccentricity (e) | 0.852 | ± 0.019 |
Inclination (i) | 59.7° | ± 1.1 |
Longitude of periastron (ω) | 44.5° | ± 1.8 |
Node (Ω) | 69.4° | ± 1.2 |
Notes | | |
Reference | Tok2019c | |
Equinox | | |
Last observation | 2018 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
24.6 |
0.118 |
2001 |
30.5 |
0.114 |
2002 |
36.7 |
0.111 |
2003 |
43.3 |
0.107 |
2004 |
50.4 |
0.103 |
2005 |
58.4 |
0.096 |
2006 |
67.8 |
0.087 |
2007 |
80.0 |
0.074 |
2008 |
98.8 |
0.057 |
2009 |
132.0 |
0.044 |
2010 |
173.9 |
0.047 |
2011 |
200.7 |
0.065 |
2012 |
214.7 |
0.087 |
2013 |
222.9 |
0.110 |
2014 |
228.3 |
0.133 |
2015 |
232.2 |
0.154 |
2016 |
235.1 |
0.174 |
2017 |
237.5 |
0.193 |
2018 |
239.4 |
0.211 |
2019 |
241.1 |
0.228 |
2020 |
242.5 |
0.244 |
2021 |
243.7 |
0.260 |
2022 |
244.8 |
0.275 |
2023 |
245.8 |
0.289 |
2024 |
246.7 |
0.303 |
2025 |
247.5 |
0.317 |
2026 |
248.3 |
0.329 |
2027 |
249.0 |
0.342 |
2028 |
249.6 |
0.354 |
2029 |
250.3 |
0.365 |
2030 |
250.8 |
0.377 |
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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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