16278-4118 HDS 2327 (HD 148138)

 
 
16h 27m 48.96s -41° 18' 29.8" P.A. 210.00 sep 0.1 mag 8.42,10.22 Sp F7V dist. 88.89 pc (289.96 l.y.)
 
 
Coord 2000 16278-4118 Discov num HDS2327 Comp Coord arcsec 2000 16 27 48.96 -41 18 29.8
Date first 1991 Date last 2021 Obs 6
Pa first 166 Pa last 209.9 P.A. Now (θ) 192°
Sep first 0.1 Sep last 0.125 Sep. Now (ρ) 0.142"
Mag pri 8.42 Mag sec 10.22 delta mag (ΔM) 1.8 Spectral class F7V (yellow-white)
Pri motion ra +034 Sec motion ra
Pri motion dec +004 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 148138 Constellation Scorpius SAO 226785 HIP 80629
Tycho2 7861-01073-1 Gaia DR2 5992865213572653568 HD 148138 CD CD-4110667
CP CP-41 7486 Distance 88.89 Distance ly 289.96
 
 
ORBITAL ELEMENTS
 
 
Period (P)34.87y± 0.71 Periastron (T)2018.19y± 0.82 Semi-major axis (a)0.165a± 0.009
Eccentricity (e)0.309± 0.042 Inclination (i)131.4°± 5.1 Longitude of periastron (ω)110.1°± 14.6
Node (Ω)21°± 4.8 Notes ReferenceTok2021f
Equinox Last observation2021 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 87.9 0.149
2001 80.2 0.155
2002 73.1 0.160
2003 66.5 0.166
2004 60.2 0.171
2005 54.4 0.176
2006 48.8 0.179
2007 43.3 0.181
2008 38.0 0.181
2009 32.5 0.179
2010 26.9 0.174
2011 20.8 0.167
2012 14.0 0.156
2013 6.1 0.142
2014 356.1 0.125
2015 342.7 0.106
2016 323.6 0.088
2017 297.1 0.077
2018 267.3 0.079
2019 242.6 0.092
2020 224.9 0.109
2021 211.8 0.123
2022 201.2 0.135
2023 192.0 0.142
2024 183.5 0.145
2025 175.2 0.146
2026 166.9 0.145
2027 158.4 0.143
2028 149.6 0.141
2029 140.6 0.139
2030 131.3 0.138


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



 
 


wds16278-4118a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic