20073-5127 RST 1059 (HD 190444)

 
 
20h 07m 19.23s -51 27' 01.3" P.A. 243.00 sep 0.1 mag 8.89,9.03 Sp F2IV dist. 274.73 pc (896.17 l.y.)
 
 
Coord 2000 20073-5127 Discov num RST1059 Comp Coord arcsec 2000 20 07 19.23 -51 27 01.3
Date first 1930 Date last 2021 Obs 14
Pa first 32 Pa last 242.7 P.A. Now (θ) 242.7°
Sep first 0.2 Sep last 0.126 Sep. Now (ρ) 0.126"
Mag pri 8.89 Mag sec 9.03 delta mag (ΔM) 0.14 Spectral class F2IV (yellow-white)
Pri motion ra +015 Sec motion ra
Pri motion dec -019 Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 190444 Constellation Telescopium SAO 246442 HIP 99114
Tycho2 8404-00697-1 Gaia DR2 6666203935371587456 HD 190444 CD CD-5112382
CP CP-5111420 Distance 274.73 Distance ly 896.17
 
 
ORBITAL ELEMENTS
 
 
Period (P)155y± 24 Periastron (T)2016.8y± 6.5 Semi-major axis (a)0.175a± 0.011
Eccentricity (e)0.294± 0.048 Inclination (i)32.6°± 6.5 Longitude of periastron (ω)154°± 59
Node (Ω)77°± 27 Notes ReferenceMdz2017
Equinox2000 Last observation Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 163.1 0.121
2001 167.1 0.119
2002 171.1 0.118
2003 175.3 0.116
2004 179.6 0.115
2005 183.9 0.115
2006 188.3 0.114
2007 192.7 0.114
2008 197.2 0.114
2009 201.6 0.114
2010 206.0 0.114
2011 210.4 0.115
2012 214.7 0.115
2013 219.0 0.116
2014 223.2 0.117
2015 227.4 0.118
2016 231.5 0.119
2017 235.5 0.120
2018 239.4 0.121
2019 243.2 0.123
2020 247.0 0.124
2021 250.7 0.125
2022 254.4 0.126
2023 258.0 0.127
2024 261.5 0.128
2025 265.0 0.128
2026 268.4 0.129
2027 271.9 0.130
2028 275.2 0.131
2029 278.6 0.131
2030 281.9 0.132


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



 
 


wds20073-5127e.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic