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 |
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Comp |
Aa,Ab |
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Coord arcsec 2000 |
05 40 45.52 -01 56 33.3 |
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Date first |
1998 |
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Date last |
2021 |
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Obs |
25 |
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Pa first |
276 |
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Pa last |
244.4 |
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P.A. Now (θ) |
29.7° |
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Sep first |
0.0 |
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Sep last |
0.039 |
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Sep. Now (ρ) |
0.036" |
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Mag pri |
2.00 |
|
Mag sec |
4.20 |
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delta mag (ΔM) |
2.2 |
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Spectral class |
O9.5Ib+ (blue) |
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Pri motion ra |
+004 |
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Sec motion ra |
|
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Pri motion dec |
+003 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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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 |
|
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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 |
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Gaia DR2 |
3216549528221605248 |
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HD |
37742 |
|
HR |
1948 |
|
GC |
7089 |
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ADS |
4263 |
|
BD |
BD-02 1338 |
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Bayer |
Zeta Orionis |
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Bayer name |
Zet Ori |
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Flamsteed |
50 Orionis |
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Flamsteed name |
50 Ori |
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Distance |
225.73 |
|
Distance ly |
736.33 |
|
Bayer greek |
ζ Ori |
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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 |
Notes | n | |
Reference | Hmm2013 | |
Equinox | 2006 | |
Last observation | | |
Grade | 2 | (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 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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