18002+8000 BAG   6Aa,Ab

 
 
18h 00m 09.07s +80 00' 13.7" P.A. 322.9 sep 0.11 mag 6.22,6.69 Sp F7V+F7V dist. 63.53 pc (207.23 l.y.)
 
 
Coord 2000
18002+8000
Discov num
BAG   6
Comp
Aa,Ab
Coord arcsec 2000
18 00 09.07 +80 00 13.7
Date first
1993
Date last
2012
Obs
31
Pa first
320
Pa last
316
P.A. Now (θ)
322.9°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.11"
Mag pri
6.22
Mag sec
6.69
delta mag (ΔM)
0.47
Spectral class
F7V+F7V (yellow-white/yellow-white)
Pri motion ra
+039
Sec motion ra
Pri motion dec
+125
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
18002+8000 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 8996 18002+8000 BAG 6 Aa,Ab 1993 2012 31 323 0.1 6.22 6.69 0.47 Y <===
Show 41 Dra 8996 18002+8000 STF2308 AB 1782 2016 170 232 18.8 5.70 6.00 0.30 Y
Show 8996 18002+8000 STF2308 AC 1782 2004 13 129 224.8 5.70 8.34 2.64
Quadruple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
315.8
Precise sep
0.102
Constellation
Draco
SAO
8996
HIP
88136
Tycho2
4578-01433-1
HD
166866
HR
6810
GC
24669
ADS
11061
BD
BD+79 571
Flamsteed
41 Draconis
Flamsteed name
41 Dra
Distance
63.53
Distance ly
207.23
last precise pa
315.8
last precise sep
0.102
 
 
ORBITAL ELEMENTS
 
 
Period (P)1246.68d (3.41y)± 0.004 Periastron (T)49571.037d (1994.597y)± 0.008 Semi-major axis (a)0.0706a± 0.0014
Eccentricity (e)0.9754± 0.0001 Inclination (i)49.7°± 2.9 Longitude of periastron (ω)127.31°± 0.13
Node (Ω)1.9°± 1.7 Note Grade2(1=Definitive, 9=Indet.)
Equinox Last observation2001
label rho theta
2000-01-01 0.110 323.3
2001-01-01 0.071 331.7
2002-01-01 0.072 312.2
2003-01-01 0.110 320.8
2004-01-01 0.096 327.3
2005-01-01 0.002 190.9
2006-01-01 0.101 318.0
2007-01-01 0.108 324.4
2008-01-01 0.054 335.1
2009-01-01 0.083 314.4
2010-01-01 0.111 321.8
2011-01-01 0.087 328.9
2012-01-01 0.052 307.5
2013-01-01 0.106 319.2
2014-01-01 0.104 325.5
2015-01-01 0.027 343.6
2016-01-01 0.092 316.1
2017-01-01 0.111 322.9
2018-01-01 0.076 330.8
2019-01-01 0.067 311.2
2020-01-01 0.109 320.4
2021-01-01 0.099 326.8
2022-01-01 0.013 280.2
2023-01-01 0.099 317.5
2024-01-01 0.109 324.0
2025-01-01 0.061 333.6
2026-01-01 0.079 313.6
2027-01-01 0.111 321.4
2028-01-01 0.091 328.2
2029-01-01 0.045 305.4
2030-01-01 0.104 318.8

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

grafico orbita





wds18002%2B8000a.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
18002+8000 BAG 6 Aa,Ab 2001 29 307 0.1 6.22 6.69 F7V F7V NOD 180009.07+800013.7
18002+8000 BAG 6 Aa,Ab 2007 30 331 0.1 6.22 6.69 F7V F7V NOD 180009.07+800013.7
18002+8000 BAG 6 Aa,Ab 2010 31 325 0.1 6.22 6.69 F7V F7V NOD 180009.07+800013.7
18002+8000 BAG 6 Aa,Ab 2012 31 317 0.1 6.22 6.69 F7V F7V NOD 180009.07+800013.7

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