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 |
|
Sep. Now (ρ) |
0.144" |
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| Mag pri |
9.19 |
|
Mag sec |
9.01 |
|
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 |
|
Constellation |
Pavo |
|
SAO |
245210 |
|
HIP |
88510 |
|
| Tycho2 |
8755-01924-1 |
|
Gaia DR2 |
6647354079827530624 |
|
HD |
164328 |
|
CP |
CP-59 7214 |
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| Distance |
72.41 |
|
Distance ly |
236.2 |
|
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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