18280+0612 CHR  71

 
 
18h 27m 58.77s +06 11' 39.0" P.A. 135.7 sep 0.06 mag 6.50,6.60 Sp B8III-IV dist. 216.92 pc (707.59 l.y.)
 
 
Coord 2000
18280+0612
Discov num
CHR  71
Comp
Coord arcsec 2000
18 27 58.77 +06 11 39.0
Date first
1985
Date last
2015
Obs
24
Pa first
312
Pa last
164
P.A. Now (θ)
135.7°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.06"
Mag pri
6.50
Mag sec
6.60
delta mag (ΔM)
0.1
Spectral class
B8III-IV (blue-white)
Pri motion ra
+004
Sec motion ra
Pri motion dec
-017
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
164.1
Precise sep
0.06
Constellation
Serpens
SAO
123516
HIP
90497
Tycho2
0445-02136-1
HD
170200
HR
6928
BD
BD+06 3790
Distance
216.92
Distance ly
707.59
last precise pa
164.1
last precise sep
0.06
 
 
ORBITAL ELEMENTS
 
 
Period (P)19.42y Periastron (T)1980.24y Semi-major axis (a)0.073a
Eccentricity (e)0.228 Inclination (i)136° Longitude of periastron (ω)61.8°
Node (Ω)137.7° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation1997
label rho theta
2000 0.042 71.9
2001 0.043 32.3
2002 0.053 1.2
2003 0.064 340.7
2004 0.073 326.1
2005 0.079 314.3
2006 0.081 303.5
2007 0.080 292.9
2008 0.077 281.7
2009 0.073 269.4
2010 0.068 255.3
2011 0.064 239.4
2012 0.062 221.8
2013 0.062 203.6
2014 0.063 185.7
2015 0.065 168.9
2016 0.065 152.7
2017 0.062 135.7
2018 0.054 115.4
2019 0.045 87.2
2020 0.041 48.7
2021 0.048 12.7
2022 0.059 348.4
2023 0.070 331.8
2024 0.077 319.0
2025 0.080 308.0
2026 0.081 297.4
2027 0.079 286.5
2028 0.075 274.7
2029 0.070 261.5
2030 0.066 246.3

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

grafico orbita





wds18280%2B0612a.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
18280+0612 CHR 71 2007 18 290 0.1 5.73   B8III-IV NO 182758.77+061139.0
18280+0612 CHR 71 2009 20 274 0.1 5.73   B8III-IV NO 182758.77+061139.0
18280+0612 CHR 71 2015 22 164 0.1 6.50 6.60 B8III-IV NO 182758.77+061139.0

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