17190-3459 MLO 4 AB (NSV8482)
17h 18m 57.16s -34° 59' 23.1" P.A. 323.00 sep 1.3 mag 6.37,7.38 Sp K3V+K5V dist. 6.84 pc (22.31 l.y.)
Coord 2000 |
17190-3459 |
|
Discov num |
MLO 4 |
|
Comp |
AB |
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Coord arcsec 2000 |
17 18 57.16 -34 59 23.1 |
|
Date first |
1876 |
|
Date last |
2021 |
|
Obs |
269 |
|
Pa first |
240 |
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Pa last |
323 |
|
P.A. Now (θ) |
314.1° |
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Sep first |
1.8 |
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Sep last |
1.272 |
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Sep. Now (ρ) |
1.534" |
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Mag pri |
6.37 |
|
Mag sec |
7.38 |
|
delta mag (ΔM) |
1.01 |
|
Spectral class |
K3V+K5V (yellow-orange/yellow-orange) |
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Pri motion ra |
+116 |
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Sec motion ra |
|
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Pri motion dec |
-017 |
|
Sec motion dec |
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Notes |
N
O
P
(See Notes, Orbital solution, 100-year proper motion) |
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This double is physical.
17190-3459 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
NSV8482 |
208670 |
17 18 57 -34 59 23 |
MLO 4 AB |
2021 |
269 |
323 |
1.3 |
6.37 |
7.38 |
1.01 |
Y |
<=== |
Show |
|
208670 |
17 18 57 -34 59 23 |
HJ 4935 AC |
2022 |
66 |
142 |
32.6 |
6.37 |
10.27 |
3.90 |
Y |
|
Show |
|
208670 |
17 18 57 -34 59 23 |
SEE 509 AD |
2022 |
28 |
285 |
92.0 |
6.37 |
12.45 |
6.08 |
|
|
Show |
|
|
17 18 56 -34 59 22 |
HJ 4935 BC |
2002 |
45 |
136 |
31.4 |
7.38 |
10.27 |
2.89 |
|
|
Show |
|
|
17 18 56 -34 59 22 |
SEE 509 BD |
1959 |
26 |
312 |
20.3 |
7.38 |
12.45 |
5.07 |
|
|
Show |
|
|
17 18 59 -34 59 48 |
SEE 509 CD |
2022 |
33 |
294 |
119.7 |
10.27 |
12.45 |
2.18 |
|
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Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Var name |
NSV8482 |
|
Constellation |
Scorpius |
|
SAO |
208670 |
|
HIP |
84709 |
|
Tycho2 |
7370-00850-1 |
|
HD |
156384 |
|
HR |
6426 |
|
GC |
23362 |
|
GL |
Gl 667A |
|
CD |
CD-3411626 |
|
CP |
CP-34 6803 |
|
Distance |
6.84 |
|
Distance ly |
22.31 |
|
ORBITAL ELEMENTS
Period (P) | 42.089y | ± 0.063 |
Periastron (T) | 58138.3d (2018.053y) | ± 5.8 |
Semi-major axis (a) | 1824.7m | ± 5.2 |
Eccentricity (e) | 0.573 | ± 0.0034 |
Inclination (i) | 127.57° | ± 0.22 |
Longitude of periastron (ω) | 68.09° | ± 0.19 |
Node (Ω) | 133.22° | ± 0.5 |
Notes | n | |
Reference | MnA2019 | |
Equinox | | |
Last observation | | |
Grade | 1 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
244.5 |
1.800 |
2001 |
240.0 |
1.750 |
2002 |
235.2 |
1.701 |
2003 |
230.1 |
1.653 |
2004 |
224.8 |
1.608 |
2005 |
219.1 |
1.565 |
2006 |
213.2 |
1.526 |
2007 |
206.9 |
1.491 |
2008 |
200.4 |
1.459 |
2009 |
193.5 |
1.430 |
2010 |
186.4 |
1.403 |
2011 |
179.1 |
1.376 |
2012 |
171.4 |
1.344 |
2013 |
163.3 |
1.301 |
2014 |
154.5 |
1.240 |
2015 |
144.5 |
1.144 |
2016 |
132.1 |
0.996 |
2017 |
114.0 |
0.777 |
2018 |
79.3 |
0.537 |
2019 |
22.7 |
0.529 |
2020 |
347.5 |
0.789 |
2021 |
330.8 |
1.080 |
2022 |
321.0 |
1.330 |
2023 |
314.1 |
1.534 |
2024 |
308.6 |
1.697 |
2025 |
304.0 |
1.826 |
2026 |
300.0 |
1.928 |
2027 |
296.3 |
2.006 |
2028 |
292.9 |
2.064 |
2029 |
289.6 |
2.105 |
2030 |
286.5 |
2.131 |
|
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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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