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 18547+2239 BU 646 AC 1878 2001 6 23 36.9 4.59 11.10 6.51
Show 18547+2239 BU 646 BC 1877 2013 7 316 9.4 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
HD
175492
HR
7133
GC
25954
ADS
11820
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

If you need more information about this double, apply for a data request form to the WDS.