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
Notes N O (See Notes, Orbital solution)
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
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 Notesn ReferenceTok2021f
Equinox Last observation2021 Grade4(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


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



 
 


wds18346-2734a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic