05387-0236 NOI 6 Aa,Ab

 
 
05h 38m 44.77s -02° 36' 00.2" P.A. 164.00 sep 0.0 mag 4.07, Sp O9.5V+ dist. 328.95 pc (1073.03 l.y.)
 
 
Coord 2000 05387-0236 Discov num NOI   6 Comp Aa,Ab Coord arcsec 2000 05 38 44.77 -02 36 00.2
Date first 2006 Date last 2013 Obs 26
Pa first 187 Pa last 164.1 P.A. Now (θ) 164.1°
Sep first 0.0 Sep last 0.003 Sep. Now (ρ) 0.003"
Mag pri 4.07 Mag sec delta mag (ΔM) Spectral class O9.5V+ (blue)
Pri motion ra +004 Sec motion ra
Pri motion dec -000 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
05387-0236 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 132406 05 38 45 -02 36 00 NOI 6 Aa,Ab 2013 26 164 0.0 4.07 Y <===
Show 132406 05 38 45 -02 36 00 BU 1032 AB 2018 179 70 0.3 4.07 5.27 1.20 Y
Show Sig Ori 132406 05 38 45 -02 36 00 STF 762 AB,C 2019 46 239 11.4 3.76 8.79 5.03
Show 132406 05 38 45 -02 36 00 STF 762 AB,D 2019 91 83 12.9 3.76 6.56 2.80
Show 132406 05 38 45 -02 36 00 STF 762 AB,E 2019 82 62 41.4 3.76 6.34 2.58
Show 132406 05 38 45 -02 36 00 STF 3135 AB,F 2016 13 324 208.0 3.76 7.86 4.10
Show 132406 05 38 45 -02 36 00 TRN 19 AB,G 2008 4 20 3.2 3.76 12.00 8.24
Show 132406 05 38 45 -02 36 00 SHJ 65 AB,H 2016 7 125 306.9 3.76 8.06 4.30
Show 132406 05 38 45 -02 36 00 SHJ 65 AB,I 2016 6 60 524.7 3.76 8.44 4.68
Show 05 38 44 -02 36 06 CAB 26 Ca,Cb 2007 2 12 2.0 9.10 14.50 5.40
Show 05 38 46 -02 35 59 STF 762 DC 2019 34 252 23.8 6.56 8.79 2.23
Show 132408 05 38 47 -02 35 40 RAS 22 Ea,Eb 2010 3 303 0.3 6.60 11.30 4.70
Show 132408 05 38 47 -02 35 40 STF 762 EC 2019 26 241 52.9 6.34 8.79 2.45
Show 132408 05 38 47 -02 35 40 STF 762 ED 2019 56 232 29.8 6.34 6.56 0.22
Show 05 39 01 -02 38 56 CAB 26 Ha,Hb 2003 0 -1 0.5 13.34
Show 05 38 45 -02 37 57 BOY 24 Ja,Jb 2007 2 317 0.2 10.60 12.80 2.20
16-fold system
10 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Orion SAO 132406 HIP 26549 Tycho2 4771-01196-1
Gaia DR2 3216486439446556544 HD 37468 HR 1931 GC 7031
ADS 4241 BD BD-02 1326 Bayer Sigma Orionis Bayer name Sig Ori
Flamsteed 48 Orionis Flamsteed name 48 Ori Distance 328.95 Distance ly 1073.03
Bayer greek σ Ori
 
 
ORBITAL ELEMENTS
 
 
Period (P)143.2002d± 0.0024 Periastron (T)56597.638d (2013.835y)± 0.014 Semi-major axis (a)4.286m± 0.0107
Eccentricity (e)0.77896± 0.00043 Inclination (i)56.378°± 0.085 Longitude of periastron (ω)19.83°± 0.12
Node (Ω)6.878°± 0.079 Notesn ReferenceNOI2016b
Equinox2000 Last observation2013 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 209.1 0.006
2001-01-01 187.4 0.006
2002-01-01 218.5 0.004
2003-01-01 192.4 0.007
2004-01-01 244.3 0.002
2005-01-01 196.7 0.007
2006-01-01 82.8 0.001
2007-01-01 201.1 0.007
2008-01-01 174.9 0.004
2009-01-01 206.3 0.006
2010-01-01 184.6 0.006
2011-01-01 213.6 0.005
2012-01-01 190.3 0.007
2013-01-01 228.3 0.003
2014-01-01 194.8 0.007
2015-01-01 313.2 0.001
2016-01-01 199.1 0.007
2017-01-01 165.0 0.003
2018-01-01 203.9 0.007
2019-01-01 181.2 0.005
2020-01-01 209.9 0.006
2021-01-01 188.0 0.007
2022-01-01 220.0 0.004
2023-01-01 192.9 0.007
2024-01-01 251.4 0.002
2025-01-01 197.2 0.007
2026-01-01 124.4 0.001
2027-01-01 201.7 0.007
2028-01-01 176.5 0.004
2029-01-01 207.0 0.006
2030-01-01 185.4 0.006


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



 
 


wds05387-0236c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic