18368-2617 RST 3187 AB (HD 171595)
18h 36m 48.23s -26° 17' 21.6" P.A. 201.00 sep 0.1 mag 8.47,8.96 Sp G3V dist. 46.43 pc (151.45 l.y.)
Coord 2000 |
18368-2617 |
|
Discov num |
RST3187 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 36 48.23 -26 17 21.6 |
|
Date first |
1934 |
|
Date last |
2021 |
|
Obs |
24 |
|
Pa first |
231 |
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Pa last |
201.4 |
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P.A. Now (θ) |
209.7° |
|
Sep first |
0.2 |
|
Sep last |
0.132 |
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Sep. Now (ρ) |
0.18" |
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Mag pri |
8.47 |
|
Mag sec |
8.96 |
|
delta mag (ΔM) |
0.49 |
|
Spectral class |
G3V (yellow) |
|
Pri motion ra |
-043 |
|
Sec motion ra |
|
|
Pri motion dec |
-040 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
18368-2617 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 171595 |
187041 |
18 36 48 -26 17 22 |
RST 3187 AB |
2021 |
24 |
201 |
0.1 |
8.47 |
8.96 |
0.49 |
Y |
<=== |
Show |
|
187041 |
18 36 48 -26 17 22 |
RST 3187 AC |
2015 |
9 |
41 |
12.7 |
8.47 |
13.80 |
5.33 |
|
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Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 171595 |
|
Constellation |
Sagittarius |
|
SAO |
187041 |
|
HIP |
91253 |
|
Tycho2 |
6866-00039-1 |
|
Gaia DR2 |
4075912835700087424 |
|
HD |
171595 |
|
CD |
CD-2613320 |
|
CP |
CP-26 6518 |
|
Distance |
46.43 |
|
Distance ly |
151.45 |
|
ORBITAL ELEMENTS
Period (P) | 18.37y | ± 0.18 |
Periastron (T) | 2017.3y | ± 0.16 |
Semi-major axis (a) | 0.1661a | ± 0.002 |
Eccentricity (e) | 0.364 | ± 0.022 |
Inclination (i) | 70.1° | ± 0.8 |
Longitude of periastron (ω) | 7.2° | ± 2.9 |
Node (Ω) | 40.6° | ± 0.9 |
Notes | | |
Reference | Tok2016e | |
Equinox | 2000 | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
64.8 |
0.076 |
2001 |
118.1 |
0.047 |
2002 |
177.0 |
0.073 |
2003 |
196.9 |
0.118 |
2004 |
205.9 |
0.159 |
2005 |
211.5 |
0.191 |
2006 |
215.7 |
0.212 |
2007 |
219.3 |
0.224 |
2008 |
222.7 |
0.225 |
2009 |
226.1 |
0.217 |
2010 |
230.1 |
0.200 |
2011 |
234.9 |
0.174 |
2012 |
242.0 |
0.139 |
2013 |
254.3 |
0.099 |
2014 |
283.6 |
0.061 |
2015 |
343.7 |
0.055 |
2016 |
20.6 |
0.086 |
2017 |
38.5 |
0.106 |
2018 |
55.5 |
0.090 |
2019 |
91.9 |
0.053 |
2020 |
161.8 |
0.058 |
2021 |
191.7 |
0.102 |
2022 |
203.2 |
0.145 |
2023 |
209.7 |
0.180 |
2024 |
214.3 |
0.205 |
2025 |
218.0 |
0.221 |
2026 |
221.4 |
0.226 |
2027 |
224.8 |
0.222 |
2028 |
228.5 |
0.208 |
2029 |
233.0 |
0.185 |
2030 |
239.0 |
0.153 |
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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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