18346-2734 TOK 422 Aa,Ab
18h 34m 37.64s -27° 33' 58.3" P.A. 102.00 sep 0.1 mag 9.80,11.00 Sp G3/5V dist. 66.58 pc (217.18 l.y.)
Coord 2000 |
18346-2734 |
|
Discov num |
TOK 422 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
18 34 37.64 -27 33 58.3 |
|
Date first |
2014 |
|
Date last |
2021 |
|
Obs |
8 |
|
Pa first |
102 |
|
Pa last |
102.4 |
|
P.A. Now (θ) |
102.4° |
|
Sep first |
0.1 |
|
Sep last |
0.109 |
|
Sep. Now (ρ) |
0.109" |
|
Mag pri |
9.80 |
|
Mag sec |
11.00 |
|
delta mag (ΔM) |
1.2 |
|
Spectral class |
G3/5V (yellow) |
|
Pri motion ra |
+001 |
|
Sec motion ra |
|
|
Pri motion dec |
+016 |
|
Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
18346-2734 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
186996 |
18 34 38 -27 33 58 |
TOK 422 Aa,Ab |
2021 |
8 |
102 |
0.1 |
9.80 |
11.00 |
1.20 |
Y |
<=== |
Show |
|
186996 |
18 34 38 -27 33 58 |
I 1026 AB |
2015 |
7 |
41 |
9.0 |
8.90 |
13.00 |
4.10 |
|
|
Show |
HD 171226 |
186996 |
18 34 38 -27 33 58 |
I 1026 A,CD |
1999 |
4 |
145 |
36.1 |
8.90 |
11.00 |
2.10 |
|
|
Show |
|
|
18 34 39 -27 34 28 |
I 1027 CD |
2015 |
4 |
69 |
1.9 |
11.01 |
12.00 |
0.99 |
|
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Quintuple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Sagittarius |
|
SAO |
186996 |
|
HIP |
91075 |
|
Tycho2 |
6866-01975-1 |
|
Gaia DR2 |
4048716827938618240 |
|
HD |
171226 |
|
CD |
CD-2712977 |
|
CP |
CP-27 6460 |
|
Distance |
66.58 |
|
Distance ly |
217.18 |
|
ORBITAL ELEMENTS
Period (P) | 8.55y | ± 0.34 |
Periastron (T) | 2016.56y | ± 0.2 |
Semi-major axis (a) | 0.06a | ± 0.002 |
Eccentricity (e) | 0.84 | ± 0.036 |
Inclination (i) | 100.6° | ± 2.2 |
Longitude of periastron (ω) | 186.5° | ± 12.3 |
Node (Ω) | 104.8° | ± 2.1 |
Notes | n | |
Reference | Tok2021f | |
Equinox | | |
Last observation | 2021 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
114.0 |
0.031 |
2001 |
108.0 |
0.074 |
2002 |
105.9 |
0.097 |
2003 |
104.5 |
0.108 |
2004 |
103.3 |
0.109 |
2005 |
101.9 |
0.100 |
2006 |
100.1 |
0.081 |
2007 |
96.3 |
0.048 |
2008 |
285.2 |
0.010 |
2009 |
110.0 |
0.054 |
2010 |
106.9 |
0.086 |
2011 |
105.3 |
0.104 |
2012 |
104.0 |
0.110 |
2013 |
102.7 |
0.106 |
2014 |
101.2 |
0.093 |
2015 |
98.8 |
0.068 |
2016 |
90.8 |
0.025 |
2017 |
116.1 |
0.024 |
2018 |
108.3 |
0.071 |
2019 |
106.1 |
0.096 |
2020 |
104.7 |
0.108 |
2021 |
103.4 |
0.109 |
2022 |
102.0 |
0.102 |
2023 |
100.3 |
0.083 |
2024 |
96.9 |
0.052 |
2025 |
308.3 |
0.006 |
2026 |
110.6 |
0.049 |
2027 |
107.1 |
0.084 |
2028 |
105.4 |
0.102 |
2029 |
104.1 |
0.110 |
2030 |
102.8 |
0.107 |
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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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