16542-4139 SNA 53 Aa,Ab
16h 54m 11.52s -41° 38' 30.9" P.A. 1.00 sep 0.0 mag 6.90,8.30 Sp O9.5III
Coord 2000 |
16542-4139 |
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Discov num |
SNA 53 |
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Comp |
Aa,Ab |
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Coord arcsec 2000 |
16 54 11.52 -41 38 30.9 |
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Date first |
2010 |
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Date last |
2014 |
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Obs |
15 |
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Pa first |
39 |
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Pa last |
1.1 |
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P.A. Now (θ) |
1.1° |
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Sep first |
0.0 |
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Sep last |
0.001 |
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Sep. Now (ρ) |
0.001" |
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Mag pri |
6.90 |
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Mag sec |
8.30 |
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delta mag (ΔM) |
1.4 |
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Spectral class |
O9.5III (blue) |
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Pri motion ra |
+000 |
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Sec motion ra |
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Pri motion dec |
-001 |
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Sec motion dec |
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Notes |
N
V
K
(See Notes, Proper motion indicates physical, K-band or other infrared magnitudes) |
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Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
16542-4139 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
227384 |
16 54 12 -41 38 31 |
SNA 53 Aa,Ab |
2014 |
15 |
1 |
0.0 |
6.90 |
8.30 |
1.40 |
Y |
<=== |
Show |
|
227384 |
16 54 12 -41 38 31 |
SNA 53 AB |
2012 |
1 |
313 |
3.2 |
6.59 |
13.83 |
7.24 |
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Show |
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227384 |
16 54 12 -41 38 31 |
SNA 53 AC |
2012 |
1 |
22 |
5.1 |
6.59 |
12.65 |
6.06 |
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Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Scorpius |
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SAO |
227384 |
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Tycho2 |
7876-02339-1 |
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Gaia DR2 |
5966524419650392832 |
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HD |
152247 |
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ORBITAL ELEMENTS
Period (P) | 581.71d | ± 0.7 |
Periastron (T) | 71266d (2053.996y) | ± 19 |
Semi-major axis (a) | 2.871m | ± 0.065 |
Eccentricity (e) | 0.593 | ± 0.015 |
Inclination (i) | 76.8° | ± 2.8 |
Longitude of periastron (ω) | 144.6° | ± 2.4 |
Node (Ω) | 47.4° | ± 2.6 |
Notes | | |
Reference | LeB2017 | |
Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000-01-01 |
257.9 |
0.001 |
2001-01-01 |
45.9 |
0.004 |
2002-01-01 |
30.6 |
0.003 |
2003-01-01 |
198.3 |
0.001 |
2004-01-01 |
41.9 |
0.004 |
2005-01-01 |
14.4 |
0.001 |
2006-01-01 |
53.3 |
0.002 |
2007-01-01 |
37.9 |
0.004 |
2008-01-01 |
277.1 |
0.001 |
2009-01-01 |
46.7 |
0.004 |
2010-01-01 |
32.2 |
0.003 |
2011-01-01 |
220.3 |
0.001 |
2012-01-01 |
42.7 |
0.004 |
2013-01-01 |
19.6 |
0.002 |
2014-01-01 |
55.9 |
0.002 |
2015-01-01 |
38.8 |
0.004 |
2016-01-01 |
305.3 |
0.001 |
2017-01-01 |
47.7 |
0.004 |
2018-01-01 |
33.6 |
0.003 |
2019-01-01 |
229.3 |
0.001 |
2020-01-01 |
43.4 |
0.004 |
2021-01-01 |
23.4 |
0.002 |
2022-01-01 |
60.0 |
0.002 |
2023-01-01 |
39.6 |
0.004 |
2024-01-01 |
334.1 |
0.001 |
2025-01-01 |
48.7 |
0.003 |
2026-01-01 |
34.8 |
0.003 |
2027-01-01 |
236.7 |
0.001 |
2028-01-01 |
44.2 |
0.004 |
2029-01-01 |
26.3 |
0.002 |
2030-01-01 |
68.4 |
0.001 |
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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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