20002-5522 B 459 BC

 
 
20h 00m 14.72s -55 22' 25.0" P.A. 223.00 sep 0.3 mag 10.98,11.07 Sp K1+K1 dist. 68.78 pc (224.36 l.y.)
 
 
Coord 2000 20002-5522 Discov num B   459 Comp BC Coord arcsec 2000 20 00 14.72 -55 22 25.0
Date first 1926 Date last 2021 Obs 16
Pa first 129 Pa last 222.8 P.A. Now (θ) 221.9°
Sep first 0.3 Sep last 0.271 Sep. Now (ρ) 0.302"
Mag pri 10.98 Mag sec 11.07 delta mag (ΔM) 0.09 Spectral class K1+K1 (yellow-orange/yellow-orange)
Pri motion ra -014 Sec motion ra -014
Pri motion dec +002 Sec motion dec +002
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
20002-5522 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 188908 246378 20 00 15 -55 22 25 I 1041 A,BC 2021 20 45 1.4 9.69 10.20 0.51
Show 20 00 15 -55 22 25 B 459 BC 2021 16 223 0.3 10.98 11.07 0.09 Y <===
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Telescopium HIP 98457 Tycho2 8780-00272-1 Gaia DR2 6449050801202399104
HD 188908 CP CP-55 9275 Distance 68.78 Distance ly 224.36
 
 
ORBITAL ELEMENTS
 
 
Period (P)72.78y± 1.2 Periastron (T)2044.56y± 0.5 Semi-major axis (a)0.292a± 0.002
Eccentricity (e)0.229± 0.005 Inclination (i)44.9°± 2 Longitude of periastron (ω)278.7°± 3
Node (Ω)64.6°± 1 Notesn ReferenceDoc2016i
Equinox2000 Last observation2015 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 130.1 0.258
2001 134.5 0.256
2002 139.0 0.254
2003 143.5 0.253
2004 148.0 0.253
2005 152.6 0.253
2006 157.1 0.254
2007 161.6 0.255
2008 166.0 0.257
2009 170.4 0.259
2010 174.7 0.262
2011 178.9 0.265
2012 183.0 0.268
2013 187.0 0.272
2014 190.9 0.275
2015 194.7 0.279
2016 198.3 0.283
2017 201.9 0.287
2018 205.4 0.290
2019 208.8 0.294
2020 212.2 0.296
2021 215.5 0.299
2022 218.7 0.301
2023 221.9 0.302
2024 225.1 0.303
2025 228.2 0.302
2026 231.4 0.301
2027 234.7 0.299
2028 238.0 0.296
2029 241.3 0.292
2030 244.8 0.286


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



 
 


wds20002-5522b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic