18413+3018 STF2367AB

 
 
18h 41m 16.36s +30 17' 40.9" P.A. 72.7 sep 0.43 mag 7.70,8.03 Sp G3IV dist. 136.05 pc (443.8 l.y.)
 
 
Coord 2000
18413+3018
Discov num
STF2367
Comp
AB
Coord arcsec 2000
18 41 16.36 +30 17 40.9
Date first
1833
Date last
2011
Obs
180
Pa first
68
Pa last
75
P.A. Now (θ)
72.7°
Sep first
0.4
Sep last
0.4
Sep. Now (ρ)
0.43"
Mag pri
7.70
Mag sec
8.03
delta mag (ΔM)
0.33
Spectral class
G3IV (yellow)
Pri motion ra
+004
Sec motion ra
Pri motion dec
-040
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
18413+3018 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 67250 18413+3018 STF2367 AB 1833 2011 180 73 0.4 7.70 8.03 0.33 Y <===
Show 67250 18413+3018 STF2367 AB,C 1828 2012 77 192 14.3 7.05 8.75 1.70
Show 67250 18413+3018 STF2367 AB,D 1891 2007 3 84 21.9 7.05 12.00 4.95
Show 67250 18413+3018 STF2367 AB,E 1880 2002 4 341 151.7 7.05 11.00 3.95
Show 67250 18413+3018 BTG 2 AB,F 1998 2007 3 173 42.4 7.05 15.10 8.05
Sextuple system
7 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
74.5
Precise sep
0.401
Constellation
Lyra
SAO
67250
HIP
91636
Tycho2
2637-00713-1
HD
172865
ADS
11579
BD
BD+30 3271
Distance
136.05
Distance ly
443.8
last precise pa
74.5
last precise sep
0.401
 
 
ORBITAL ELEMENTS
 
 
Period (P)92.2y± 0.41 Periastron (T)1980.82y± 0.015 Semi-major axis (a)0.239a± 0.0034
Eccentricity (e)0.91± 0.002 Inclination (i)121°± 1.6 Longitude of periastron (ω)348°± 1.7
Node (Ω)244°± 1.1 Note Grade2(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 0.322 78.3
2001 0.331 77.8
2002 0.340 77.4
2003 0.349 77.0
2004 0.357 76.6
2005 0.364 76.2
2006 0.372 75.9
2007 0.379 75.6
2008 0.385 75.2
2009 0.392 74.9
2010 0.397 74.6
2011 0.403 74.3
2012 0.408 74.0
2013 0.413 73.7
2014 0.418 73.5
2015 0.422 73.2
2016 0.426 72.9
2017 0.429 72.7
2018 0.433 72.4
2019 0.436 72.2
2020 0.438 71.9
2021 0.441 71.7
2022 0.443 71.4
2023 0.445 71.2
2024 0.446 70.9
2025 0.448 70.7
2026 0.449 70.5
2027 0.449 70.2
2028 0.450 70.0
2029 0.450 69.8
2030 0.449 69.5

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

grafico orbita





wds18413%2B3018a.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
18413+3018 STF2367 AB 2004 174 78 0.4 7.70 8.03 G3IV NOD 184116.36+301740.9
18413+3018 STF2367 AB 2006 176 75 0.4 7.70 8.03 G3IV NOD 184116.36+301740.9
18413+3018 STF2367 AB 2007 178 73 0.4 7.70 8.03 G3IV NOD 184116.36+301740.9
18413+3018 STF2367 AB 2009 179 76 0.4 7.70 8.03 G3IV NOD 184116.36+301740.9
18413+3018 STF2367 AB 2010 181 75 0.4 7.70 8.03 G3IV NOD 184116.36+301740.9
18413+3018 STF2367 AB 2011 183 75 0.4 7.70 8.03 G3IV NO 184116.36+301740.9

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