18558+0327 A  2192

 
 
18H 55M 48.63S +03 26' 59.3" P.A. 313.8 SEP 0.14 MAG 7.73,8.00 SP A5V DIST. 143.06 PC (466.66 L.Y.)
 
 
Coord 2000
18558+0327
Discov num
A  2192
Comp
Coord arcsec 2000
18 55 48.63 +03 26 59.3
Date first
1910
Date last
2015
Obs
88
Pa first
241
Pa last
351
P.A. Now (θ)
313.8°
Sep first
0.3
Sep last
0.1
Sep. Now (ρ)
0.14"
Mag pri
7.73
Mag sec
8.00
delta mag (ΔM)
0.27
Spectral class
A5V (white)
Pri motion ra
+021
Sec motion ra
Pri motion dec
-011
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Serpens
HIP
92909
HD
175543
ADS
11842
Distance
143.06
Distance ly
466.66
last precise pa
350.8
last precise sep
0.148
 
 
ORBITAL ELEMENTS
 
 
Period (P)132.18y Periastron (T)2012.77y Semi-major axis (a)0.276a
Eccentricity (e)0.277 Inclination (i)129° Longitude of periastron (ω)84.3°
Node (Ω)74° Note Grade3(1=Definitive, 9=Indet.)
Equinox Last observation1988
label rho theta
2000 0.211 57.5
2001 0.204 54.6
2002 0.196 51.5
2003 0.188 48.1
2004 0.180 44.4
2005 0.172 40.4
2006 0.165 35.9
2007 0.157 31.1
2008 0.149 25.7
2009 0.143 19.8
2010 0.137 13.4
2011 0.132 6.4
2012 0.128 359.0
2013 0.126 351.2
2014 0.126 343.3
2015 0.127 335.4
2016 0.130 327.8
2017 0.134 320.5
2018 0.139 313.8
2019 0.146 307.6
2020 0.153 302.0
2021 0.161 296.9
2022 0.169 292.3
2023 0.177 288.1
2024 0.185 284.3
2025 0.193 280.8
2026 0.201 277.6
2027 0.209 274.6
2028 0.217 271.8
2029 0.224 269.2
2030 0.230 266.8

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