16545-4148 SNA 56 Aa,Ab
16h 54m 32.00s -41° 48' 18.8" P.A. 63.00 sep 0.0 mag 7.60,8.70 Sp O9.5IV
| Coord 2000 |
16545-4148 |
|
Discov num |
SNA 56 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
16 54 32.00 -41 48 18.8 |
|
| Date first |
2010 |
|
Date last |
2016 |
|
Obs |
11 |
|
| Pa first |
291 |
|
Pa last |
62.6 |
|
P.A. Now (θ) |
62.6° |
|
| Sep first |
0.0 |
|
Sep last |
0.004 |
|
Sep. Now (ρ) |
0.004" |
|
| Mag pri |
7.60 |
|
Mag sec |
8.70 |
|
delta mag (ΔM) |
1.1 |
|
Spectral class |
O9.5IV (blue) |
|
| Pri motion ra |
-002 |
|
Sec motion ra |
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| Pri motion dec |
+000 |
|
Sec motion dec |
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| Notes |
N
V
K
(See Notes, Proper motion indicates physical, K-band or other infrared magnitudes) |
|
Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
16545-4148 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
227400 |
16 54 32 -41 48 19 |
SNA 56 Aa,Ab |
2016 |
11 |
63 |
0.0 |
7.60 |
8.70 |
1.10 |
Y |
<=== |
| Show |
HD 152314 |
227400 |
16 54 32 -41 48 19 |
SNA 56 AB |
2011 |
1 |
187 |
3.2 |
7.24 |
11.06 |
3.82 |
|
|
| Show |
|
227400 |
16 54 32 -41 48 19 |
SNA 56 AC |
2011 |
1 |
141 |
3.5 |
7.24 |
14.88 |
7.64 |
|
|
Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Scorpius |
|
SAO |
227400 |
|
Tycho2 |
7876-01997-1 |
|
Gaia DR2 |
5966509438804267264 |
|
| HD |
152314 |
|
ORBITAL ELEMENTS
| Period (P) | 3749d (10.26y) | ± 13 |
Periastron (T) | 56886d (2014.624y) | ± 12 |
Semi-major axis (a) | 9.365m | ± 0.091 |
| Eccentricity (e) | 0.4948 | ± 0.0081 |
Inclination (i) | 105.55° | ± 0.66 |
Longitude of periastron (ω) | 310.5° | ± 1.8 |
| Node (Ω) | 98.23° | ± 0.76 |
Notes | | |
Reference | LeB2017 | |
| Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
290.4 |
0.011 |
| 2001 |
285.0 |
0.012 |
| 2002 |
279.5 |
0.011 |
| 2003 |
271.2 |
0.007 |
| 2004 |
188.5 |
0.001 |
| 2005 |
93.8 |
0.006 |
| 2006 |
66.6 |
0.004 |
| 2007 |
1.6 |
0.003 |
| 2008 |
315.7 |
0.005 |
| 2009 |
300.1 |
0.008 |
| 2010 |
292.0 |
0.011 |
| 2011 |
286.3 |
0.012 |
| 2012 |
281.1 |
0.011 |
| 2013 |
274.1 |
0.009 |
| 2014 |
247.0 |
0.003 |
| 2015 |
100.2 |
0.005 |
| 2016 |
75.9 |
0.005 |
| 2017 |
22.2 |
0.003 |
| 2018 |
323.1 |
0.005 |
| 2019 |
303.1 |
0.008 |
| 2020 |
293.8 |
0.010 |
| 2021 |
287.7 |
0.012 |
| 2022 |
282.5 |
0.012 |
| 2023 |
276.3 |
0.010 |
| 2024 |
261.7 |
0.005 |
| 2025 |
109.4 |
0.004 |
| 2026 |
83.1 |
0.005 |
| 2027 |
41.8 |
0.003 |
| 2028 |
333.3 |
0.004 |
| 2029 |
306.7 |
0.007 |
| 2030 |
295.8 |
0.009 |
|
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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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