18547+2239 MKT 9 Aa,Ab
18h 54m 44.88s +22° 38' 42.3" P.A. 271.00 sep 0.0 mag 4.80,6.80 Sp G4III+A6V dist. 144.72 pc (472.08 l.y.)
| Coord 2000 |
18547+2239 |
|
Discov num |
MKT 9 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
18 54 44.88 +22 38 42.3 |
|
| Date first |
1990 |
|
Date last |
2004 |
|
Obs |
42 |
|
| Pa first |
299 |
|
Pa last |
271.4 |
|
P.A. Now (θ) |
271.4° |
|
| Sep first |
0.0 |
|
Sep last |
0.009 |
|
Sep. Now (ρ) |
0.009" |
|
| Mag pri |
4.80 |
|
Mag sec |
6.80 |
|
delta mag (ΔM) |
2 |
|
Spectral class |
G4III+A6V (yellow/white) |
|
| Pri motion ra |
+000 |
|
Sec motion ra |
|
|
| Pri motion dec |
+001 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
18547+2239 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
86567 |
18 54 45 +22 38 42 |
MKT 9 Aa,Ab |
2004 |
42 |
271 |
0.0 |
4.80 |
6.80 |
2.00 |
Y |
<=== |
| Show |
113 Her |
86567 |
18 54 45 +22 38 42 |
BU 646 AB |
2001 |
9 |
37 |
34.4 |
4.59 |
11.10 |
6.51 |
|
|
| Show |
|
86567 |
18 54 45 +22 38 42 |
BU 646 AC |
2001 |
6 |
23 |
36.9 |
4.59 |
11.10 |
6.51 |
|
|
| Show |
|
|
18 54 46 +22 39 10 |
BU 646 BC |
2015 |
12 |
316 |
9.1 |
11.10 |
11.10 |
0.00 |
|
|
Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hercules |
|
SAO |
86567 |
|
HIP |
92818 |
|
Tycho2 |
2109-02837-1 |
|
| Gaia DR2 |
4532952022299038976 |
|
HD |
175492 |
|
HR |
7133 |
|
GC |
25954 |
|
| ADS |
11820 |
|
BD |
BD+22 3524 |
|
Flamsteed |
113 Herculis |
|
Flamsteed name |
113 Her |
|
| FK5 |
3508 |
|
Distance |
144.72 |
|
Distance ly |
472.08 |
|
ORBITAL ELEMENTS
| Period (P) | 245.52d | ± 0.08 |
Periastron (T) | 47784.1d (1989.704y) | ± 0.8 |
Semi-major axis (a) | 10.1m | ± 0.1 |
| Eccentricity (e) | 0.102 | ± 0.005 |
Inclination (i) | 40.2° | ± 0.6 |
Longitude of periastron (ω) | 186.7° | ± 2 |
| Node (Ω) | 70.1° | ± 1.2 |
Notes | n | |
Reference | MkT1995 | |
| Equinox | 2000 | |
Last observation | 1992 | |
Grade | 1 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
28.6 |
0.009 |
| 2001-01-01 |
179.2 |
0.008 |
| 2002-01-01 |
20.1 |
0.009 |
| 2003-01-01 |
167.5 |
0.008 |
| 2004-01-01 |
10.6 |
0.008 |
| 2005-01-01 |
155.9 |
0.008 |
| 2006-01-01 |
0.2 |
0.008 |
| 2007-01-01 |
144.8 |
0.008 |
| 2008-01-01 |
348.9 |
0.008 |
| 2009-01-01 |
134.4 |
0.008 |
| 2010-01-01 |
336.8 |
0.008 |
| 2011-01-01 |
124.9 |
0.009 |
| 2012-01-01 |
324.6 |
0.008 |
| 2013-01-01 |
116.3 |
0.009 |
| 2014-01-01 |
312.5 |
0.008 |
| 2015-01-01 |
108.4 |
0.010 |
| 2016-01-01 |
300.9 |
0.008 |
| 2017-01-01 |
101.3 |
0.010 |
| 2018-01-01 |
290.2 |
0.008 |
| 2019-01-01 |
94.7 |
0.010 |
| 2020-01-01 |
280.2 |
0.008 |
| 2021-01-01 |
88.5 |
0.011 |
| 2022-01-01 |
270.8 |
0.009 |
| 2023-01-01 |
82.6 |
0.011 |
| 2024-01-01 |
262.0 |
0.009 |
| 2025-01-01 |
76.9 |
0.011 |
| 2026-01-01 |
253.5 |
0.009 |
| 2027-01-01 |
71.3 |
0.011 |
| 2028-01-01 |
245.1 |
0.009 |
| 2029-01-01 |
65.7 |
0.011 |
| 2030-01-01 |
236.6 |
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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