18044-5953 RST 5099 (HD 164328)
18h 04m 26.16s -59° 52' 31.6" P.A. 343.00 sep 0.2 mag 9.19,9.01 Sp G3/5V dist. 72.41 pc (236.2 l.y.)
Coord 2000 |
18044-5953 |
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Discov num |
RST5099 |
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Comp |
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Coord arcsec 2000 |
18 04 26.16 -59 52 31.6 |
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Date first |
1942 |
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Date last |
2021 |
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Obs |
16 |
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Pa first |
75 |
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Pa last |
343 |
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P.A. Now (θ) |
355.7° |
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Sep first |
0.3 |
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Sep last |
0.156 |
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Sep. Now (ρ) |
0.144" |
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Mag pri |
9.19 |
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Mag sec |
9.01 |
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delta mag (ΔM) |
0.18 |
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Spectral class |
G3/5V (yellow) |
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Pri motion ra |
-020 |
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Sec motion ra |
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Pri motion dec |
-171 |
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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 164328 |
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Constellation |
Pavo |
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SAO |
245210 |
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HIP |
88510 |
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Tycho2 |
8755-01924-1 |
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Gaia DR2 |
6647354079827530624 |
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HD |
164328 |
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CP |
CP-59 7214 |
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Distance |
72.41 |
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Distance ly |
236.2 |
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ORBITAL ELEMENTS
Period (P) | 45.64y | ± 2.1 |
Periastron (T) | 2009.1y | ± 0.1 |
Semi-major axis (a) | 0.259a | ± 0.004 |
Eccentricity (e) | 0.513 | ± 0.01 |
Inclination (i) | 68.2° | ± 1 |
Longitude of periastron (ω) | 107.1° | ± 2.7 |
Node (Ω) | 114.4° | ± 1 |
Notes | n | |
Reference | Tok2015c | |
Equinox | 2000 | |
Last observation | 2014 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
105.7 |
0.265 |
2001 |
108.1 |
0.257 |
2002 |
110.8 |
0.245 |
2003 |
113.8 |
0.228 |
2004 |
117.4 |
0.206 |
2005 |
121.9 |
0.177 |
2006 |
128.6 |
0.141 |
2007 |
140.7 |
0.098 |
2008 |
171.9 |
0.057 |
2009 |
238.8 |
0.055 |
2010 |
272.2 |
0.095 |
2011 |
285.3 |
0.133 |
2012 |
293.1 |
0.161 |
2013 |
298.9 |
0.179 |
2014 |
303.8 |
0.188 |
2015 |
308.5 |
0.192 |
2016 |
313.1 |
0.191 |
2017 |
317.8 |
0.186 |
2018 |
322.8 |
0.180 |
2019 |
328.3 |
0.173 |
2020 |
334.2 |
0.165 |
2021 |
340.7 |
0.157 |
2022 |
347.9 |
0.150 |
2023 |
355.7 |
0.144 |
2024 |
4.1 |
0.140 |
2025 |
12.8 |
0.138 |
2026 |
21.7 |
0.138 |
2027 |
30.3 |
0.141 |
2028 |
38.5 |
0.146 |
2029 |
46.1 |
0.153 |
2030 |
52.9 |
0.161 |
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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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