16318-0216 A   693

 
 
16H 31M 45.09S -02 15' 36.0" P.A. 97.8 SEP 0.15 MAG 9.24,9.29 SP F5 DIST. 168.63 PC (550.07 L.Y.)
 
 
Coord 2000
16318-0216
Discov num
A   693
Comp
Coord arcsec 2000
16 31 45.09 -02 15 36.0
Date first
1904
Date last
2014
Obs
51
Pa first
8
Pa last
111
P.A. Now (θ)
97.8°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.15"
Mag pri
9.24
Mag sec
9.29
delta mag (ΔM)
0.05
Spectral class
F5 (yellow-white)
Pri motion ra
+021
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
 
 
Constellation
Ophiuchus
HIP
80949
Tycho2
5052-00207-1
HD
148943
ADS
10095
BD
BD-01 3206
Distance
168.63
Distance ly
550.07
last precise pa
111.4
last precise sep
0.137
 
 
ORBITAL ELEMENTS
 
 
Period (P)96.18y± 0.89 Periastron (T)1991.33y± 0.68 Semi-major axis (a)0.195a± 0.003
Eccentricity (e)0.278± 0.011 Inclination (i)129.3°± 1.7 Longitude of periastron (ω)344.2°± 3.8
Node (Ω)220.9°± 2.2 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.135 192.9
2001 0.132 188.1
2002 0.130 183.0
2003 0.127 177.8
2004 0.125 172.3
2005 0.123 166.6
2006 0.121 160.8
2007 0.120 154.8
2008 0.120 148.8
2009 0.120 142.8
2010 0.121 136.8
2011 0.123 131.0
2012 0.126 125.5
2013 0.129 120.1
2014 0.133 115.1
2015 0.137 110.3
2016 0.142 105.8
2017 0.147 101.7
2018 0.152 97.8
2019 0.157 94.1
2020 0.163 90.8
2021 0.168 87.6
2022 0.174 84.7
2023 0.180 81.9
2024 0.185 79.3
2025 0.191 76.8
2026 0.196 74.5
2027 0.201 72.3
2028 0.206 70.2
2029 0.211 68.2
2030 0.215 66.3

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