12392-4022 B 1215 (HD 109961)

12h 39m 10.45s -40° 22' 07.3" P.A. 11.00 sep 0.3 mag 9.15,9.84 Sp G3V dist. 87.57 pc (285.65 l.y.)

Coord 2000 12392-4022 Discov num B  1215 Comp Coord arcsec 2000 12 39 10.45 -40 22 07.3
Date first 1929 Date last 2018 Obs 25
Pa first 68 Pa last 10.7 P.A. Now (θ) 10.7°
Sep first 0.2 Sep last 0.278 Sep. Now (ρ) 0.278"
Mag pri 9.15 Mag sec 9.84 delta mag (ΔM) 0.69 Spectral class G3V (yellow)
Pri motion ra -088 Sec motion ra
Pri motion dec -007 Sec motion dec
Notes N O (See Notes, Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 109961 Constellation Centaurus SAO 223574 HIP 61729
Tycho2 7762-00220-1 HD 109961 CD CD-39 7742 CP CP-39 5648
Distance 87.57 Distance ly 285.65




ORBITAL ELEMENTS

Period (P)59.82y± 0.24 Periastron (T)1995.378y± 0.54 Semi-major axis (a)0.242a± 0.03
Eccentricity (e)0.636± 0.037 Inclination (i)50.6°± 6.5 Longitude of periastron (ω)133.8°± 11.3
Node (Ω)57.2°± 10.4 Notesn ReferenceFMR2013b
Equinox2000 Last observation2011 Grade4(1=Definitive, 9=Indet.)

label theta rho
2000 278.6 0.127
2001 288.9 0.132
2002 298.3 0.138
2003 306.9 0.145
2004 314.7 0.153
2005 321.7 0.161
2006 328.0 0.170
2007 333.6 0.180
2008 338.7 0.190
2009 343.3 0.200
2010 347.4 0.210
2011 351.1 0.220
2012 354.6 0.229
2013 357.7 0.239
2014 0.6 0.249
2015 3.3 0.258
2016 5.8 0.267
2017 8.2 0.275
2018 10.4 0.283
2019 12.5 0.291
2020 14.5 0.298
2021 16.4 0.305
2022 18.2 0.311
2023 19.9 0.317
2024 21.6 0.323
2025 23.2 0.327
2026 24.8 0.332
2027 26.4 0.335
2028 27.9 0.338
2029 29.4 0.340
2030 30.9 0.342


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



 
 


wds12392-4022b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic