18384-0312 A    88AB

 
 
18H 38M 23.80S -03 11' 37.4" P.A. 163.8 SEP 0.12 MAG 7.22,7.51 SP F9V DIST. 47.96 PC (156.45 L.Y.)
 
 
Coord 2000
18384-0312
Discov num
A    88
Comp
AB
Coord arcsec 2000
18 38 23.80 -03 11 37.4
Date first
1900
Date last
2015
Obs
152
Pa first
353
Pa last
215
P.A. Now (θ)
163.8°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.12"
Mag pri
7.22
Mag sec
7.51
delta mag (ΔM)
0.29
Spectral class
F9V (yellow-white)
Pri motion ra
+007
Sec motion ra
Pri motion dec
+037
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
18384-0312 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 142461 18384-0312 A 88 AB 1900 2015 152 164 0.1 7.22 7.51 0.29 Y <===
Show 142461 18384-0312 A 88 AB,C 1909 1998 6 115 18.5 5.87 14.00 8.13
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Serpens
SAO
142461
HIP
91394
Tycho2
5117-02162-1
HD
172088
HR
6999
ADS
11520
BD
BD-03 4331
Distance
47.96
Distance ly
156.45
last precise pa
215
last precise sep
0.119
 
 
ORBITAL ELEMENTS
 
 
Period (P)12.135y± 0.006 Periastron (T)2007.18y± 0.04 Semi-major axis (a)0.1461a± 0.0008
Eccentricity (e)0.2567± 0.0029 Inclination (i)123.9°± 5 Longitude of periastron (ω)79.7°± 1.5
Node (Ω)173.4°± 0.9 Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.126 310.3
2001 0.107 284.8
2002 0.102 252.8
2003 0.114 222.9
2004 0.131 200.2
2005 0.136 181.5
2006 0.114 160.4
2007 0.068 116.0
2008 0.080 36.5
2009 0.127 3.8
2010 0.149 346.4
2011 0.146 331.1
2012 0.129 313.1
2013 0.109 288.7
2014 0.102 257.2
2015 0.112 226.5
2016 0.129 202.9
2017 0.137 184.0
2018 0.119 163.8
2019 0.073 125.3
2020 0.074 44.3
2021 0.122 6.8
2022 0.148 348.5
2023 0.148 333.2
2024 0.132 315.9
2025 0.112 292.5
2026 0.102 261.7
2027 0.110 230.3
2028 0.127 205.7
2029 0.137 186.5
2030 0.123 167.0

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