16094-3103 I 557 (HD 144926)

 
 
16h 09m 26.97s -31° 03' 11.2" P.A. 19.00 sep 0.3 mag 7.80,8.20 Sp A7IV
 
 
Coord 2000 16094-3103 Discov num I   557 Comp Coord arcsec 2000 16 09 26.97 -31 03 11.2
Date first 1909 Date last 2019 Obs 24
Pa first 20 Pa last 19.3 P.A. Now (θ) 19.3°
Sep first 0.5 Sep last 0.278 Sep. Now (ρ) 0.278"
Mag pri 7.80 Mag sec 8.20 delta mag (ΔM) 0.4 Spectral class A7IV (white)
Pri motion ra -069 Sec motion ra
Pri motion dec -074 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 144926 Constellation Scorpius SAO 207395 Tycho2 7330-02616-1
Gaia DR2 6036781288524608896 HD 144926 GC 21711
 
 
ORBITAL ELEMENTS
 
 
Period (P)136.2y± 10 Periastron (T)2034y± 3 Semi-major axis (a)0.62a± 0.05
Eccentricity (e)0.726± 0.08 Inclination (i)85.9°± 1 Longitude of periastron (ω)248.4°± 4.5
Node (Ω)26.3°± 1 Notes ReferenceDoc2018l
Equinox2000 Last observation2018 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 144.5 0.071
2001 153.7 0.077
2002 161.3 0.085
2003 167.5 0.095
2004 172.5 0.105
2005 176.6 0.116
2006 180.0 0.127
2007 182.9 0.138
2008 185.3 0.149
2009 187.4 0.161
2010 189.2 0.172
2011 190.8 0.184
2012 192.2 0.195
2013 193.4 0.206
2014 194.5 0.217
2015 195.5 0.227
2016 196.5 0.237
2017 197.3 0.247
2018 198.1 0.256
2019 198.8 0.265
2020 199.5 0.272
2021 200.2 0.279
2022 200.8 0.285
2023 201.4 0.289
2024 202.0 0.292
2025 202.6 0.292
2026 203.2 0.291
2027 203.8 0.286
2028 204.4 0.277
2029 205.1 0.264
2030 205.9 0.244


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



 
 


wds16094-3103d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic