05407-0157 NOI 1 Aa,Ab

 
 
05h 40m 45.52s -01° 56' 33.3" P.A. 244.00 sep 0.0 mag 2.00,4.20 Sp O9.5Ib+ dist. 225.73 pc (736.33 l.y.)
 
 
Coord 2000 05407-0157 Discov num NOI   1 Comp Aa,Ab Coord arcsec 2000 05 40 45.52 -01 56 33.3
Date first 1998 Date last 2021 Obs 25
Pa first 276 Pa last 244.4 P.A. Now (θ) 29.7°
Sep first 0.0 Sep last 0.039 Sep. Now (ρ) 0.036"
Mag pri 2.00 Mag sec 4.20 delta mag (ΔM) 2.2 Spectral class O9.5Ib+ (blue)
Pri motion ra +004 Sec motion ra
Pri motion dec +003 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
05407-0157 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 132444 05 40 46 -01 56 33 NOI 1 Aa,Ab 2021 25 244 0.0 2.00 4.20 2.20 Y <===
Show Alnitak 132444 05 40 46 -01 56 33 STF 774 AB 2021 261 166 2.4 1.88 3.70 1.82 Y
Show 132444 05 40 46 -01 56 33 STF 774 AC 2017 29 10 58.5 1.88 9.55 7.67
Show 05 40 46 -01 56 36 STF 774 BC 2002 3 8 59.8 3.70 9.55 5.85
Quadruple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Alnitak Var name NSV2553 Ori Constellation Orion SAO 132444
HIP 26727 Tycho2 4771-01188-1 Gaia DR2 3216549528221605248 HD 37742
HR 1948 GC 7089 ADS 4263 BD BD-02 1338
Bayer Zeta Orionis Bayer name Zet Ori Flamsteed 50 Orionis Flamsteed name 50 Ori
Distance 225.73 Distance ly 736.33 Bayer greek ζ Ori
Other names ALNITAH
Meaning belt
 
 
ORBITAL ELEMENTS
 
 
Period (P)2687.3d (7.36y)± 7 Periastron (T)52734.2d (2003.257y)± 9 Semi-major axis (a)35.9m± 0.2
Eccentricity (e)0.338± 0.004 Inclination (i)139.3°± 0.6 Longitude of periastron (ω)204.2°± 1.2
Node (Ω)83.8°± 0.8 Notesn ReferenceHmm2013
Equinox2006 Last observation Grade2(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 55.7 0.044
2001-01-01 27.1 0.035
2002-01-01 336.2 0.026
2003-01-01 265.6 0.024
2004-01-01 169.7 0.022
2005-01-01 110.3 0.036
2006-01-01 84.3 0.046
2007-01-01 63.6 0.046
2008-01-01 38.9 0.039
2009-01-01 357.8 0.029
2010-01-01 291.6 0.025
2011-01-01 207.5 0.020
2012-01-01 124.7 0.031
2013-01-01 92.3 0.044
2014-01-01 71.0 0.047
2015-01-01 48.8 0.042
2016-01-01 15.6 0.032
2017-01-01 316.8 0.025
2018-01-01 242.6 0.023
2019-01-01 145.6 0.025
2020-01-01 101.5 0.040
2021-01-01 78.3 0.047
2022-01-01 57.4 0.045
2023-01-01 29.7 0.036
2024-01-01 340.9 0.027
2025-01-01 271.0 0.025
2026-01-01 177.0 0.021
2027-01-01 112.9 0.035
2028-01-01 85.8 0.045
2029-01-01 65.2 0.046
2030-01-01 41.1 0.039


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



 
 


wds05407-0157b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic