20205-2749 RST 3255 (HD 193280)
20h 20m 28.13s -27° 49' 28.4" P.A. 109.00 sep 0.1 mag 10.60,10.60 Sp G1/2V
| Coord 2000 |
20205-2749 |
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Discov num |
RST3255 |
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Comp |
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Coord arcsec 2000 |
20 20 28.13 -27 49 28.4 |
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| Date first |
1935 |
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Date last |
2021 |
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Obs |
11 |
|
| Pa first |
71 |
|
Pa last |
109 |
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P.A. Now (θ) |
109° |
|
| Sep first |
0.2 |
|
Sep last |
0.101 |
|
Sep. Now (ρ) |
0.101" |
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| Mag pri |
10.60 |
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Mag sec |
10.60 |
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delta mag (ΔM) |
0 |
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Spectral class |
G1/2V (yellow) |
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| Pri motion ra |
+033 |
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Sec motion ra |
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| Pri motion dec |
-006 |
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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 193280 |
|
Constellation |
Sagittarius |
|
Tycho2 |
6914-01503-1 |
|
Gaia DR2 |
6846141929538210560 |
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| HD |
193280 |
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ORBITAL ELEMENTS
| Period (P) | 45.7y | |
Periastron (T) | 1951.9y | |
Semi-major axis (a) | 0.217a | |
| Eccentricity (e) | 0.16 | |
Inclination (i) | 55.4° | |
Longitude of periastron (ω) | 91.9° | |
| Node (Ω) | 98° | |
Notes | | |
Reference | Hei1986a | |
| Equinox | 2000 | |
Last observation | 1984 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
231.2 |
0.127 |
| 2001 |
242.6 |
0.144 |
| 2002 |
251.7 |
0.160 |
| 2003 |
259.0 |
0.176 |
| 2004 |
265.3 |
0.189 |
| 2005 |
270.7 |
0.200 |
| 2006 |
275.7 |
0.208 |
| 2007 |
280.4 |
0.212 |
| 2008 |
285.0 |
0.214 |
| 2009 |
289.5 |
0.214 |
| 2010 |
294.1 |
0.210 |
| 2011 |
299.0 |
0.205 |
| 2012 |
304.1 |
0.198 |
| 2013 |
309.6 |
0.190 |
| 2014 |
315.6 |
0.181 |
| 2015 |
322.3 |
0.172 |
| 2016 |
329.7 |
0.163 |
| 2017 |
337.9 |
0.155 |
| 2018 |
347.0 |
0.149 |
| 2019 |
356.7 |
0.145 |
| 2020 |
6.8 |
0.143 |
| 2021 |
16.9 |
0.144 |
| 2022 |
26.7 |
0.148 |
| 2023 |
35.8 |
0.154 |
| 2024 |
44.2 |
0.162 |
| 2025 |
51.8 |
0.170 |
| 2026 |
58.6 |
0.180 |
| 2027 |
64.7 |
0.189 |
| 2028 |
70.3 |
0.197 |
| 2029 |
75.4 |
0.205 |
| 2030 |
80.2 |
0.211 |
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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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