18520-5418 TOK 325Aa,Ab

 
 
18h 52m 01.95s -54 18' 07.0" P.A. 116.9 sep 0.05 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
2017
Obs
9
Pa first
271
Pa last
81
P.A. Now (θ)
116.9°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.05"
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 (See Notes)
Nature of this double is uncertain.
 
 
18520-5418 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18520-5418 TOK 325 Aa,Ab 2012 2017 9 117 0.0 8.61 11.50 2.89 Y <===
Show 18520-5418 TOK 325 AB 1893 2001 7 33 145.8 8.61 11.42 2.81
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
81.1
Precise sep
0.062
Cdsa2 id
TOK 325 Aa,Ab
Constellation
Telescopium
HIP
92592
HD
174122
Ra deg
18.867208333333334
De deg
-54.301944444444445
Distance
51.28
Distance ly
167.28
last precise pa
81.1
last precise sep
0.062
 
 
ORBITAL ELEMENTS
 
 
Period (P)8y Periastron (T)2017.985y± 0.136 Semi-major axis (a)0.1012a± 0.0029
Eccentricity (e)0.413± 0.029 Inclination (i)60.8°± 2 Longitude of periastron (ω)41.2°± 4.6
Node (Ω)92.4°± 2.5 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.057 359.7
2001 0.063 63.0
2002 0.048 116.9
2003 0.066 245.0
2004 0.117 269.8
2005 0.130 282.7
2006 0.117 295.8
2007 0.086 315.8
2008 0.057 359.7
2009 0.063 63.0
2010 0.048 116.9
2011 0.066 245.0
2012 0.117 269.8
2013 0.130 282.7
2014 0.117 295.8
2015 0.086 315.8
2016 0.057 359.7
2017 0.063 63.0
2018 0.048 116.9
2019 0.066 245.0
2020 0.117 269.8
2021 0.130 282.7
2022 0.117 295.8
2023 0.086 315.8
2024 0.057 359.7
2025 0.063 63.0
2026 0.048 116.9
2027 0.066 245.0
2028 0.117 269.8
2029 0.130 282.7
2030 0.117 295.8

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

grafico orbita





wds18520-5418e.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

If you need more information about this double, apply for a data request form to the WDS.