18520-5418 TOK 325Aa,Ab

 
 
18h 52m 01.95s -54 18' 07.0" P.A. 191.90 sep 0.1 mag 8.61,11.50 Sp G3V dist. 51.28 pc (167.28 l.y.)
 
 
Coord 2000
18520-5418
Discov num
TOK 325
Comp
Aa,Ab
Coord arcsec 2000
18 52 01.95 -54 18 07.0
Date first
2012
Date last
2020
Obs
16
Pa first
271
Pa last
215
P.A. Now (θ)
191.9°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.08"
Mag pri
8.61
Mag sec
11.50
delta mag (ΔM)
2.89
Spectral class
G3V (yellow)
Pri motion ra
+060
Sec motion ra
Pri motion dec
-042
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
18520-5418 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 245762 18 52 02 -54 18 07 TOK 325 Aa,Ab 2020 16 192 0.1 8.61 11.50 2.89 Y <===
Show 245762 18 52 02 -54 18 07 TOK 325 AB 2015 8 32 146.0 8.61 11.42 2.81
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
214.5
Precise sep
0.077
Constellation
Telescopium
SAO
245762
HIP
92592
Tycho2
8758-02778-1
Gaia DR2
6650457382678224640
HD
174122
CP
CP-54 9114
Distance
51.28
Distance ly
167.28
last precise pa
214.5
last precise sep
0.077
 
 
ORBITAL ELEMENTS
 
 
Period (P)13.2y± 1.8 Periastron (T)2017.12y± 0.21 Semi-major axis (a)0.106a± 0.004
Eccentricity (e)0.314± 0.064 Inclination (i)47.3°± 5.6 Longitude of periastron (ω)308.3°± 13
Node (Ω)110.7°± 4.7 Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation2018
label rho theta
2000 0.123 285.1
2001 0.109 299.6
2002 0.083 321.2
2003 0.054 6.8
2004 0.061 74.4
2005 0.081 113.0
2006 0.085 141.0
2007 0.083 169.0
2008 0.085 197.4
2009 0.095 222.2
2010 0.107 241.7
2011 0.119 257.0
2012 0.126 270.1
2013 0.124 282.6
2014 0.113 296.4
2015 0.089 315.8
2016 0.059 354.3
2017 0.057 63.0
2018 0.078 106.8
2019 0.085 135.5
2020 0.083 163.3
2021 0.084 191.9
2022 0.092 217.6
2023 0.105 238.1
2024 0.117 254.2
2025 0.125 267.6
2026 0.125 280.0
2027 0.116 293.4
2028 0.094 311.1
2029 0.064 343.7
2030 0.053 50.0


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds18520-5418f.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18520-5418 TOK 325 Aa,Ab 2013 3 293 0.1 8.61 11.50 185201.95-541807.0
18520-5418 TOK 325 Aa,Ab 2014 5 311 0.1 8.61 11.50 G3V 185201.95-541807.0
18520-5418 TOK 325 Aa,Ab 2015 7 327 0.1 8.61 11.50 G3V 185201.95-541807.0
18520-5418 TOK 325 Aa,Ab 2017 9 81 0.1 8.61 11.50 G3V N 185201.95-541807.0
18520-5418 TOK 325 Aa,Ab 2018 12 128 0.1 8.61 11.50 G3V NO 185201.95-541807.0
18520-5418 TOK 325 Aa,Ab 2019 13 155 0.1 8.61 11.50 G3V NO 185201.95-541807.0

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