12268-0536 A 78 (HD 108320)

 
 
12h 26m 47.72s -05° 35' 31.6" P.A. 80.00 sep 0.3 mag 8.11,8.79 Sp F4V dist. 110.38 pc (360.06 l.y.)
 
 
Coord 2000 12268-0536 Discov num A    78 Comp Coord arcsec 2000 12 26 47.72 -05 35 31.6
Date first 1900 Date last 2016 Obs 44
Pa first 86 Pa last 80.1 P.A. Now (θ) 83.7°
Sep first 0.3 Sep last 0.339 Sep. Now (ρ) 0.358"
Mag pri 8.11 Mag sec 8.79 delta mag (ΔM) 0.68 Spectral class F4V (yellow-white)
Pri motion ra +016 Sec motion ra
Pri motion dec -014 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 108320 Constellation Virgo SAO 138781 HIP 60727
Tycho2 4947-01348-1 Gaia DR2 3680638096221825536 HD 108320 ADS 8551
BD BD-04 3281 Distance 110.38 Distance ly 360.06
 
 
ORBITAL ELEMENTS
 
 
Period (P)111.93y± 1.72 Periastron (T)1997.5y± 0.4 Semi-major axis (a)0.263a± 0.005
Eccentricity (e)0.798± 0.008 Inclination (i)49.3°± 2.2 Longitude of periastron (ω)42.1°± 4.9
Node (Ω)249.9°± 3.2 Notesn ReferenceHrt2009
Equinox Last observation2007 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 26.6 0.068
2001 40.6 0.092
2002 48.8 0.115
2003 54.3 0.137
2004 58.4 0.157
2005 61.6 0.175
2006 64.2 0.191
2007 66.4 0.207
2008 68.3 0.221
2009 70.0 0.235
2010 71.5 0.248
2011 72.8 0.259
2012 74.1 0.271
2013 75.2 0.281
2014 76.3 0.291
2015 77.3 0.300
2016 78.3 0.309
2017 79.1 0.317
2018 80.0 0.325
2019 80.8 0.332
2020 81.6 0.339
2021 82.3 0.346
2022 83.0 0.352
2023 83.7 0.358
2024 84.4 0.363
2025 85.1 0.369
2026 85.7 0.373
2027 86.3 0.378
2028 86.9 0.382
2029 87.5 0.386
2030 88.1 0.390


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



 
 


wds12268-0536b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic