16161-3037 I 1586 (HD 146177)

 
 
16h 16m 03.71s -30° 37' 18.3" P.A. 192.00 sep 0.3 mag 8.11,9.40 Sp F0 dist. 166.67 pc (543.68 l.y.)
 
 
Coord 2000 16161-3037 Discov num I  1586 Comp Coord arcsec 2000 16 16 03.71 -30 37 18.3
Date first 1927 Date last 2018 Obs 17
Pa first 11 Pa last 192 P.A. Now (θ) 192°
Sep first 0.5 Sep last 0.348 Sep. Now (ρ) 0.348"
Mag pri 8.11 Mag sec 9.40 delta mag (ΔM) 1.29 Spectral class F0 (yellow-white)
Pri motion ra -023 Sec motion ra
Pri motion dec -014 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 146177 Constellation Scorpius SAO 207494 HIP 79706
Tycho2 7343-00890-1 Gaia DR2 6038342560667937792 HD 146177 GC 21866
CD CD-3012986 CP CP-30 4320 Distance 166.67 Distance ly 543.68
 
 
ORBITAL ELEMENTS
 
 
Period (P)160y Periastron (T)2050.85y Semi-major axis (a)0.361a
Eccentricity (e)0.2 Inclination (i)137.9° Longitude of periastron (ω)261.2°
Node (Ω)0.1° Notes ReferenceTok2019c
Equinox Last observation2018 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 223.4 0.341
2001 221.6 0.342
2002 219.8 0.344
2003 218.0 0.345
2004 216.2 0.346
2005 214.4 0.347
2006 212.7 0.349
2007 210.9 0.349
2008 209.2 0.350
2009 207.4 0.351
2010 205.7 0.351
2011 204.0 0.352
2012 202.3 0.352
2013 200.5 0.352
2014 198.8 0.352
2015 197.1 0.352
2016 195.4 0.351
2017 193.6 0.350
2018 191.9 0.349
2019 190.1 0.348
2020 188.4 0.346
2021 186.6 0.345
2022 184.8 0.343
2023 183.0 0.340
2024 181.1 0.338
2025 179.2 0.335
2026 177.3 0.332
2027 175.3 0.328
2028 173.4 0.325
2029 171.3 0.321
2030 169.2 0.317


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


 
  


wds16161-3037a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic