18547+2239 MKT   9Aa,Ab

 
 
18h 54m 44.88s +22 38' 42.3" P.A. 271 mag 4.59, 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
P.A. Now (θ)
271°
Sep first
0.0
Sep last
0.0
Sep. Now (ρ)
0"
Mag pri
4.59
Mag sec
delta mag (ΔM)
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_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 86567 18547+2239 MKT 9 Aa,Ab 1990 2004 42 271 0.0 4.59 Y <===
Show 113 Her 86567 18547+2239 BU 646 AB 1878 2001 9 37 34.4 4.59 11.10 6.51
Show 86567 18547+2239 BU 646 AC 1878 2001 6 23 36.9 4.59 11.10 6.51
Show 86567 18547+2239 BU 646 BC 1877 2015 8 316 9.1 11.10 11.10 0.00
Quadruple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
271.4
Precise sep
0.009
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 He
Distance
144.72
Distance ly
472.08
last precise pa
271.4
last precise sep
0.009
 
 
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 Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation1992
label rho theta
2000-01-01 0.009 28.6
2001-01-01 0.008 179.2
2002-01-01 0.009 20.1
2003-01-01 0.008 167.5
2004-01-01 0.008 10.6
2005-01-01 0.008 155.9
2006-01-01 0.008 0.2
2007-01-01 0.008 144.8
2008-01-01 0.008 348.9
2009-01-01 0.008 134.4
2010-01-01 0.008 336.8
2011-01-01 0.009 124.9
2012-01-01 0.008 324.6
2013-01-01 0.009 116.3
2014-01-01 0.008 312.5
2015-01-01 0.010 108.4
2016-01-01 0.008 300.9
2017-01-01 0.010 101.3
2018-01-01 0.008 290.2
2019-01-01 0.010 94.7
2020-01-01 0.008 280.2
2021-01-01 0.011 88.5
2022-01-01 0.009 270.8
2023-01-01 0.011 82.6
2024-01-01 0.009 262.0
2025-01-01 0.011 76.9
2026-01-01 0.009 253.5
2027-01-01 0.011 71.3
2028-01-01 0.009 245.1
2029-01-01 0.011 65.7
2030-01-01 0.009 236.6

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





wds18547%2B2239a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18547+2239 MKT 9 Aa,Ab 1992 39 45 0.0 4.59   G4III+A6V NO 185444.88+223842.3
18547+2239 MKT 9 Aa,Ab 2004 42 271 0.0 4.59   G4III+A6V NO 185444.88+223842.3

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