18086+1838 HU  314

 
 
18h 08m 38.26s +18 38' 08.8" P.A. 71.5 sep 0.29 mag 8.84,9.22 Sp B9.5V dist. 1190.48 pc (3883.35 l.y.)
 
 
Coord 2000
18086+1838
Discov num
HU  314
Comp
Coord arcsec 2000
18 08 38.26 +18 38 08.8
Date first
1901
Date last
2010
Obs
47
Pa first
147
Pa last
79
P.A. Now (θ)
71.5°
Sep first
0.4
Sep last
0.3
Sep. Now (ρ)
0.29"
Mag pri
8.84
Mag sec
9.22
delta mag (ΔM)
0.38
Spectral class
B9.5V (blue-white)
Pri motion ra
+006
Sec motion ra
Pri motion dec
-002
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
79.2
Precise sep
0.27
Constellation
Hercules
SAO
103419
HIP
88875
Tycho2
1571-00365-1
HD
166157
ADS
11098
BD
BD+18 3566
Distance
1190.48
Distance ly
3883.35
last precise pa
79.2
last precise sep
0.27
 
 
ORBITAL ELEMENTS
 
 
Period (P)1075y Periastron (T)1885.7y Semi-major axis (a)0.602a
Eccentricity (e)0.2 Inclination (i)123.1° Longitude of periastron (ω)31.7°
Node (Ω)170° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2010
label rho theta
2000 0.284 84.9
2001 0.284 84.1
2002 0.285 83.3
2003 0.285 82.5
2004 0.285 81.7
2005 0.285 80.9
2006 0.286 80.1
2007 0.286 79.3
2008 0.286 78.5
2009 0.287 77.7
2010 0.287 76.9
2011 0.288 76.1
2012 0.288 75.4
2013 0.289 74.6
2014 0.289 73.8
2015 0.290 73.0
2016 0.291 72.3
2017 0.292 71.5
2018 0.292 70.7
2019 0.293 70.0
2020 0.294 69.2
2021 0.295 68.5
2022 0.296 67.7
2023 0.297 67.0
2024 0.298 66.2
2025 0.299 65.5
2026 0.300 64.8
2027 0.301 64.1
2028 0.302 63.4
2029 0.303 62.6
2030 0.304 61.9

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

grafico orbita





wds18086%2B1838a.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
18086+1838 HU 314 2005 43 81 0.3 8.84 9.22 B9.5V 180838.26+183808.8
18086+1838 HU 314 2010 44 79 0.3 8.84 9.22 B9.5V 180838.26+183808.8

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