17542+1108 FIN 381 (V2388 Oph)

 
 
17H 54M 14.21S +11 07' 51.4" P.A. 8.8 SEP 0.08 MAG 7.00,7.20 SP F5VN DIST. 83.33 PC (271.82 L.Y.)
 
 
Coord 2000
17542+1108
Discov num
FIN 381
Comp
Coord arcsec 2000
17 54 14.21 +11 07 51.4
Date first
1959
Date last
2008
Obs
41
Pa first
104
Pa last
209
P.A. Now (θ)
8.8°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.08"
Mag pri
7.00
Mag sec
7.20
delta mag (ΔM)
0.2
Spectral class
F5Vn (yellow-white)
Pri motion ra
-058
Sec motion ra
Pri motion dec
-165
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name
V2388 Oph
Constellation
Ophiuchus
SAO
103194
HIP
87655
Tycho2
1011-00007-1
HD
163151
HR
6676
BD
BD+11 3283
Distance
83.33
Distance ly
271.82
last precise pa
209.2
last precise sep
0.063
 
 
ORBITAL ELEMENTS
 
 
Period (P)9.008y± 0.015 Periastron (T)2016.305y± 0.05 Semi-major axis (a)0.0853a± 0.002
Eccentricity (e)0.327± 0.002 Inclination (i)160.9°± 5 Longitude of periastron (ω)58.3°± 10
Node (Ω)173.6°± 10 Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation2008
label rho theta
2000 0.084 8.2
2001 0.100 337.7
2002 0.108 314.2
2003 0.108 292.2
2004 0.102 268.8
2005 0.090 240.7
2006 0.074 202.3
2007 0.058 141.2
2008 0.061 59.7
2009 0.083 8.5
2010 0.100 337.9
2011 0.108 314.3
2012 0.108 292.4
2013 0.102 269.0
2014 0.090 241.0
2015 0.075 202.6
2016 0.058 141.8
2017 0.061 60.3
2018 0.083 8.8
2019 0.100 338.1
2020 0.108 314.5
2021 0.108 292.6
2022 0.102 269.2
2023 0.090 241.2
2024 0.075 203.0
2025 0.058 142.4
2026 0.061 60.9
2027 0.083 9.1
2028 0.100 338.4
2029 0.108 314.7
2030 0.108 292.7

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic