18596+1504 ENG  65AB (Deneb el okab)

 
 
18h 59m 37.39s +15 04' 06.5" P.A. 185 sep 123.4 mag 4.13,10.56 Sp K1-III dist. 47.51 pc (154.98 l.y.)
 
 
Coord 2000
18596+1504
Discov num
ENG  65
Comp
AB
Coord arcsec 2000
18 59 37.39 +15 04 06.5
Date first
1887
Date last
2012
Obs
15
Pa first
187
Pa last
185
P.A. Now (θ)
185°
Sep first
132.4
Sep last
123.4
Sep. Now (ρ)
123.4"
Mag pri
4.13
Mag sec
10.56
delta mag (ΔM)
6.43
Spectral class
K1-III (yellow-orange)
Pri motion ra
-051
Sec motion ra
+004
Pri motion dec
-072
Sec motion dec
+002
Notes
N (See Notes)
rPM=1.045
This double is not physical.
 
 
18596+1504 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Deneb el okab 104318 18596+1504 ENG 65 AB 1887 2012 15 185 123.4 4.13 10.56 6.43 Y <===
Show 18596+1504 ENG 65 AC 1887 2001 11 160 145.0 4.13 11.25 7.12
Show 18596+1504 ENG 65 BC 1887 2013 12 102 59.5 10.56 11.25 0.69
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
184.8
Precise sep
123.44
Common name
Deneb el okab
Other names
Deneb
Constellation
Aquila
SAO
104318
HIP
93244
Tycho2
1585-02531-1
HD
176411
HR
7176
GC
26091
Bayer
Epsilon Aquilae
Bayer name
Eps Aql
Flamsteed
13 Aquilae
Flamsteed name
13 Aql
Distance
47.51
Distance ly
154.98
last precise pa
184.8
last precise sep
123.44
 
 
ORBITAL ELEMENTS
 
 
Period (P)1270.6d (3.48y) Periastron (T)41718.5d (1973.097y) Semi-major axis (a)12.8m± 0.44
Eccentricity (e)0.27 Inclination (i)87.5°± 6.6 Longitude of periastron (ω)82°
Node (Ω)58.7°± 3.9 Note Grade9(1=Definitive, 9=Indet.)
Equinox Last observation1992
label rho theta
2000-01-01 0.010 56.4
2001-01-01 0.001 214.5
2002-01-01 0.012 240.6
2003-01-01 0.004 47.9
2004-01-01 0.011 59.3
2005-01-01 0.012 238.4
2006-01-01 0.005 246.8
2007-01-01 0.011 56.7
2008-01-01 0.002 228.3
2009-01-01 0.011 240.9
2010-01-01 0.004 49.9
2011-01-01 0.010 59.6
2012-01-01 0.012 238.7
2013-01-01 0.004 248.4
2014-01-01 0.011 56.9
2015-01-01 0.003 232.2
2016-01-01 0.011 241.1
2017-01-01 0.005 51.3
2018-01-01 0.009 59.9
2019-01-01 0.013 238.9
2020-01-01 0.003 250.5
2021-01-01 0.011 57.2
2022-01-01 0.005 234.1
2023-01-01 0.010 241.4
2024-01-01 0.006 52.3
2025-01-01 0.009 60.3
2026-01-01 0.013 239.0
2027-01-01 0.003 253.9
2028-01-01 0.012 57.4
2029-01-01 0.006 235.2
2030-01-01 0.010 241.7

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

grafico orbita





wds18596%2B1504s.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
18596+1504 ENG 65 AB 2000 11 184 124.0 4.13 10.56 N D 185937.39+150406.5
18596+1504 ENG 65 AB 2010 12 184 123.4 4.13 10.56 N D 185937.39+150406.5
18596+1504 ENG 65 AB 2012 15 185 123.4 4.13 10.56 K1-III N 185937.39+150406.5

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