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 |
|
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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 |
Notes | n | |
Reference | NOI2016b | |
Equinox | 2000 | |
Last observation | 2013 | |
Grade | 4 | (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 |
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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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