18092-2211 RST 3157 (HD 165893)
18h 09m 12.18s -22° 11' 00.6" P.A. 143.00 sep 0.1 mag 9.58,9.92 Sp K3/4V dist. 32.8 pc (106.99 l.y.)
Coord 2000 |
18092-2211 |
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Discov num |
RST3157 |
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Comp |
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Coord arcsec 2000 |
18 09 12.18 -22 11 00.6 |
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Date first |
1935 |
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Date last |
2021 |
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Obs |
33 |
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Pa first |
109 |
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Pa last |
143.3 |
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P.A. Now (θ) |
206.7° |
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Sep first |
0.2 |
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Sep last |
0.132 |
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Sep. Now (ρ) |
0.117" |
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Mag pri |
9.58 |
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Mag sec |
9.92 |
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delta mag (ΔM) |
0.34 |
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Spectral class |
K3/4V (yellow-orange) |
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Pri motion ra |
-015 |
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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 |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 165893 |
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Constellation |
Sagittarius |
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SAO |
186363 |
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HIP |
88932 |
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Tycho2 |
6276-00651-1 |
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Gaia DR2 |
4069746980613766144 |
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HD |
165893 |
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BD |
BD-22 4584 |
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CD |
CD-2212617 |
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CP |
CP-22 6736 |
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Distance |
32.8 |
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Distance ly |
106.99 |
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ORBITAL ELEMENTS
Period (P) | 9.32y | |
Periastron (T) | 2015.185y | |
Semi-major axis (a) | 0.149a | |
Eccentricity (e) | 0.413 | |
Inclination (i) | 48.1° | |
Longitude of periastron (ω) | 238.6° | |
Node (Ω) | 63.1° | |
Notes | | |
Reference | Tok2018e | |
Equinox | 2000 | |
Last observation | 2018 | |
Grade | 1 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
89.5 |
0.179 |
2001 |
106.7 |
0.167 |
2002 |
128.2 |
0.145 |
2003 |
157.2 |
0.126 |
2004 |
193.0 |
0.118 |
2005 |
232.4 |
0.109 |
2006 |
307.6 |
0.062 |
2007 |
40.7 |
0.114 |
2008 |
67.3 |
0.165 |
2009 |
84.4 |
0.180 |
2010 |
100.9 |
0.172 |
2011 |
120.7 |
0.152 |
2012 |
147.0 |
0.131 |
2013 |
181.1 |
0.119 |
2014 |
219.1 |
0.114 |
2015 |
272.3 |
0.078 |
2016 |
24.3 |
0.089 |
2017 |
60.7 |
0.153 |
2018 |
79.2 |
0.178 |
2019 |
95.4 |
0.177 |
2020 |
113.8 |
0.159 |
2021 |
137.7 |
0.137 |
2022 |
169.6 |
0.121 |
2023 |
206.7 |
0.117 |
2024 |
250.2 |
0.096 |
2025 |
356.1 |
0.067 |
2026 |
52.7 |
0.137 |
2027 |
73.8 |
0.174 |
2028 |
90.2 |
0.179 |
2029 |
107.5 |
0.166 |
2030 |
129.2 |
0.144 |
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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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