20205-2749 RST 3255 (HD 193280)

 
 
20h 20m 28.13s -27 49' 28.4" P.A. 109.00 sep 0.1 mag 10.60,10.60 Sp G1/2V
 
 
Coord 2000 20205-2749 Discov num RST3255 Comp Coord arcsec 2000 20 20 28.13 -27 49 28.4
Date first 1935 Date last 2021 Obs 11
Pa first 71 Pa last 109 P.A. Now (θ) 109°
Sep first 0.2 Sep last 0.101 Sep. Now (ρ) 0.101"
Mag pri 10.60 Mag sec 10.60 delta mag (ΔM) 0 Spectral class G1/2V (yellow)
Pri motion ra +033 Sec motion ra
Pri motion dec -006 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 193280 Constellation Sagittarius Tycho2 6914-01503-1 Gaia DR2 6846141929538210560
HD 193280
 
 
ORBITAL ELEMENTS
 
 
Period (P)45.7y Periastron (T)1951.9y Semi-major axis (a)0.217a
Eccentricity (e)0.16 Inclination (i)55.4° Longitude of periastron (ω)91.9°
Node (Ω)98° Notes ReferenceHei1986a
Equinox2000 Last observation1984 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 231.2 0.127
2001 242.6 0.144
2002 251.7 0.160
2003 259.0 0.176
2004 265.3 0.189
2005 270.7 0.200
2006 275.7 0.208
2007 280.4 0.212
2008 285.0 0.214
2009 289.5 0.214
2010 294.1 0.210
2011 299.0 0.205
2012 304.1 0.198
2013 309.6 0.190
2014 315.6 0.181
2015 322.3 0.172
2016 329.7 0.163
2017 337.9 0.155
2018 347.0 0.149
2019 356.7 0.145
2020 6.8 0.143
2021 16.9 0.144
2022 26.7 0.148
2023 35.8 0.154
2024 44.2 0.162
2025 51.8 0.170
2026 58.6 0.180
2027 64.7 0.189
2028 70.3 0.197
2029 75.4 0.205
2030 80.2 0.211


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



 
 


wds20205-2749a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic