05407-0157 STF 774 AB (Alnitak)
05h 40m 45.52s -01° 56' 33.3" P.A. 166.00 sep 2.4 mag 1.88,3.70 Sp +B0III dist. 225.73 pc (736.33 l.y.)
Coord 2000 |
05407-0157 |
|
Discov num |
STF 774 |
|
Comp |
AB |
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Coord arcsec 2000 |
05 40 45.52 -01 56 33.3 |
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Date first |
1822 |
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Date last |
2021 |
|
Obs |
261 |
|
Pa first |
152 |
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Pa last |
166.3 |
|
P.A. Now (θ) |
166.3° |
|
Sep first |
2.3 |
|
Sep last |
2.4 |
|
Sep. Now (ρ) |
2.4" |
|
Mag pri |
1.88 |
|
Mag sec |
3.70 |
|
delta mag (ΔM) |
1.82 |
|
Spectral class |
+B0III |
|
Pri motion ra |
+004 |
|
Sec motion ra |
+004 |
|
Pri motion dec |
+003 |
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Sec motion dec |
+003 |
|
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 |
|
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 |
|
ORBITAL ELEMENTS
Period (P) | 1508.6y | |
Periastron (T) | 2070.6y | |
Semi-major axis (a) | 2.728a | |
Eccentricity (e) | 0.07 | |
Inclination (i) | 72° | |
Longitude of periastron (ω) | 47.3° | |
Node (Ω) | 155.5° | |
Notes | n | |
Reference | Hop1967 | |
Equinox | 1900 | |
Last observation | 1955 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
164.8 |
2.280 |
2001 |
164.9 |
2.275 |
2002 |
165.0 |
2.269 |
2003 |
165.1 |
2.264 |
2004 |
165.2 |
2.259 |
2005 |
165.3 |
2.253 |
2006 |
165.4 |
2.248 |
2007 |
165.5 |
2.242 |
2008 |
165.7 |
2.236 |
2009 |
165.8 |
2.231 |
2010 |
165.9 |
2.225 |
2011 |
166.0 |
2.219 |
2012 |
166.1 |
2.213 |
2013 |
166.2 |
2.208 |
2014 |
166.3 |
2.202 |
2015 |
166.4 |
2.196 |
2016 |
166.6 |
2.190 |
2017 |
166.7 |
2.184 |
2018 |
166.8 |
2.178 |
2019 |
166.9 |
2.172 |
2020 |
167.0 |
2.166 |
2021 |
167.1 |
2.160 |
2022 |
167.2 |
2.154 |
2023 |
167.4 |
2.147 |
2024 |
167.5 |
2.141 |
2025 |
167.6 |
2.135 |
2026 |
167.7 |
2.129 |
2027 |
167.8 |
2.122 |
2028 |
168.0 |
2.116 |
2029 |
168.1 |
2.110 |
2030 |
168.2 |
2.103 |
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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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