18471+5523 SIG 5

 
 
18h 47m 03.42s +55° 22' 43.3" P.A. 126.00 sep 0.2 mag 12.55,12.81 Sp M7+M7.5
 
 
Coord 2000 18471+5523 Discov num SIG   5 Comp Coord arcsec 2000 18 47 03.42 +55 22 43.3
Date first 2003 Date last 2013 Obs 17
Pa first 91 Pa last 125.7 P.A. Now (θ) 125.7°
Sep first 0.1 Sep last 0.238 Sep. Now (ρ) 0.238"
Mag pri 12.55 Mag sec 12.81 delta mag (ΔM) 0.26 Spectral class M7+M7.5 (red/red)
Pri motion ra +132 Sec motion ra
Pri motion dec -068 Sec motion dec
Notes N O K (See Notes, Orbital solution, K-band or other infrared magnitudes)
Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Draco Gaia DR2 2147054361726599552
 
 
ORBITAL ELEMENTS
 
 
Period (P)34y± 5 Periastron (T)61700d (2027.805y)± 2000 Semi-major axis (a)186m± 18
Eccentricity (e)0.31± 0.09 Inclination (i)75.9°± 0.7 Longitude of periastron (ω)158°± 31
Node (Ω)127.9°± 0.5 Notesn ReferenceDup2017
Equinox Last observation2013 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 0.6 0.054
2001 36.8 0.046
2002 70.6 0.057
2003 89.7 0.079
2004 100.2 0.103
2005 106.6 0.128
2006 111.0 0.151
2007 114.3 0.172
2008 116.9 0.190
2009 119.0 0.206
2010 120.9 0.219
2011 122.6 0.229
2012 124.2 0.235
2013 125.7 0.238
2014 127.2 0.238
2015 128.7 0.233
2016 130.3 0.225
2017 132.1 0.213
2018 134.1 0.197
2019 136.5 0.177
2020 139.7 0.152
2021 144.2 0.124
2022 151.5 0.093
2023 166.4 0.061
2024 205.5 0.038
2025 261.2 0.047
2026 285.9 0.075
2027 296.8 0.103
2028 303.4 0.123
2029 308.6 0.131
2030 313.6 0.128


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



 
 


wds18471%2B5523b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic