20217-3637 HDS 2908 (HD 193464)
20h 21m 43.04s -36° 36' 35.9" P.A. 133.00 sep 0.0 mag 8.25,8.45 Sp G0/G1V dist. 59.38 pc (193.7 l.y.)
Coord 2000 |
20217-3637 |
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Discov num |
HDS2908 |
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Comp |
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Coord arcsec 2000 |
20 21 43.04 -36 36 35.9 |
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Date first |
1991 |
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Date last |
2021 |
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Obs |
13 |
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Pa first |
108 |
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Pa last |
133.1 |
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P.A. Now (θ) |
268.3° |
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Sep first |
0.1 |
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Sep last |
0.025 |
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Sep. Now (ρ) |
0.057" |
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Mag pri |
8.25 |
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Mag sec |
8.45 |
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delta mag (ΔM) |
0.2 |
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Spectral class |
G0/G1V (yellow) |
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Pri motion ra |
+068 |
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Sec motion ra |
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Pri motion dec |
-044 |
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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 193464 |
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Constellation |
Sagittarius |
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SAO |
212038 |
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HIP |
100417 |
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Tycho2 |
7454-00791-1 |
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Gaia DR2 |
6695767221764909824 |
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HD |
193464 |
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CD |
CD-3713693 |
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CP |
CP-37 8776 |
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Distance |
59.38 |
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Distance ly |
193.7 |
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ORBITAL ELEMENTS
Period (P) | 12.74y | ± 0.24 |
Periastron (T) | 2007.44y | ± 0.52 |
Semi-major axis (a) | 0.112a | ± 0.0065 |
Eccentricity (e) | 0.518 | ± 0.046 |
Inclination (i) | 80.8° | ± 2.7 |
Longitude of periastron (ω) | 338.9° | ± 10.7 |
Node (Ω) | 107.8° | ± 0.6 |
Notes | | |
Reference | Tok2016e | |
Equinox | 2000 | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
282.0 |
0.141 |
2001 |
284.1 |
0.158 |
2002 |
286.0 |
0.164 |
2003 |
287.8 |
0.158 |
2004 |
290.0 |
0.139 |
2005 |
293.3 |
0.104 |
2006 |
302.4 |
0.049 |
2007 |
89.7 |
0.027 |
2008 |
113.4 |
0.053 |
2009 |
163.1 |
0.018 |
2010 |
263.4 |
0.045 |
2011 |
275.5 |
0.088 |
2012 |
279.9 |
0.122 |
2013 |
282.6 |
0.147 |
2014 |
284.6 |
0.161 |
2015 |
286.4 |
0.164 |
2016 |
288.3 |
0.155 |
2017 |
290.7 |
0.132 |
2018 |
294.6 |
0.092 |
2019 |
310.4 |
0.032 |
2020 |
100.3 |
0.043 |
2021 |
118.5 |
0.046 |
2022 |
209.0 |
0.017 |
2023 |
268.3 |
0.057 |
2024 |
276.9 |
0.098 |
2025 |
280.7 |
0.129 |
2026 |
283.2 |
0.151 |
2027 |
285.1 |
0.163 |
2028 |
286.9 |
0.163 |
2029 |
288.9 |
0.150 |
2030 |
291.4 |
0.123 |
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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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