16318-0701 STF 3105 (HD 148931)

 
 
16h 31m 47.95s -07° 01' 23.9" P.A. 180.00 sep 0.6 mag 7.68,9.25 Sp A0V dist. 163.4 pc (533.01 l.y.)
 
 
Coord 2000 16318-0701 Discov num STF3105 Comp Coord arcsec 2000 16 31 47.95 -07 01 23.9
Date first 1830 Date last 2022 Obs 135
Pa first 59 Pa last 179.7 P.A. Now (θ) 181.8°
Sep first 0.4 Sep last 0.57 Sep. Now (ρ) 0.557"
Mag pri 7.68 Mag sec 9.25 delta mag (ΔM) 1.57 Spectral class A0V (white)
Pri motion ra -011 Sec motion ra -011
Pri motion dec -017 Sec motion dec -017
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 148931 Constellation Ophiuchus SAO 141223 HIP 80954
Tycho2 5060-00251-1 Gaia DR2 4351421518665318400 HD 148931 GC 22219
ADS 10092 BD BD-06 4446 Distance 163.4 Distance ly 533.01
 
 
ORBITAL ELEMENTS
 
 
Period (P)540y Periastron (T)1955y Semi-major axis (a)0.635a
Eccentricity (e)0.65 Inclination (i)127° Longitude of periastron (ω)87°
Node (Ω)17° Notes ReferenceHei1996c
Equinox2000 Last observation Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 188.8 0.441
2001 188.2 0.446
2002 187.6 0.451
2003 187.0 0.455
2004 186.4 0.460
2005 185.8 0.464
2006 185.3 0.468
2007 184.7 0.472
2008 184.2 0.476
2009 183.6 0.480
2010 183.1 0.484
2011 182.6 0.488
2012 182.1 0.492
2013 181.6 0.495
2014 181.1 0.499
2015 180.6 0.502
2016 180.1 0.505
2017 179.6 0.509
2018 179.1 0.512
2019 178.7 0.515
2020 178.2 0.518
2021 177.8 0.521
2022 177.3 0.524
2023 176.9 0.527
2024 176.4 0.530
2025 176.0 0.532
2026 175.5 0.535
2027 175.1 0.538
2028 174.7 0.540
2029 174.3 0.543
2030 173.9 0.545
2031 173.4 0.548
2032 173.0 0.550
2033 172.6 0.552
2034 172.2 0.554
2035 171.8 0.557
2036 171.4 0.559
2037 171.0 0.561
2038 170.7 0.563
2039 170.3 0.565
2040 169.9 0.567
2041 169.5 0.569
2042 169.1 0.571
2043 168.8 0.573
2044 168.4 0.574
2045 168.0 0.576
2046 167.6 0.578
2047 167.3 0.580
2048 166.9 0.581
2049 166.5 0.583
2050 166.2 0.584


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds16318-0701a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic