20002-5522 B   459BC

 
 
20h 00m 14.72s -55 22' 25.0" P.A. 205.4 sep 0.29 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
2017
Obs
15
Pa first
129
Pa last
204
P.A. Now (θ)
205.4°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.29"
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_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20002-5522 I 1041 A,BC 1910 2017 19 41 1.4 9.69 10.20 0.51
Show 20002-5522 B 459 BC 1926 2017 15 205 0.3 10.98 11.07 0.09 Y <===
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
204.2
Precise sep
0.284
Cdsa2 id
B 459 BC
Constellation
Telescopium
HIP
98457
HD
188908
Ra deg
20.004088888888887
De deg
-55.37361111111111
Distance
68.78
Distance ly
224.36
last precise pa
204.2
last precise sep
0.284
 
 
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 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2015
label rho theta
2000 0.258 130.1
2001 0.256 134.5
2002 0.254 139.0
2003 0.253 143.5
2004 0.253 148.0
2005 0.253 152.6
2006 0.254 157.1
2007 0.255 161.6
2008 0.257 166.0
2009 0.259 170.4
2010 0.262 174.7
2011 0.265 178.9
2012 0.268 183.0
2013 0.272 187.0
2014 0.275 190.9
2015 0.279 194.7
2016 0.283 198.3
2017 0.287 201.9
2018 0.290 205.4
2019 0.294 208.8
2020 0.296 212.2
2021 0.299 215.5
2022 0.301 218.7
2023 0.302 221.9
2024 0.303 225.1
2025 0.302 228.2
2026 0.301 231.4
2027 0.299 234.7
2028 0.296 238.0
2029 0.292 241.3
2030 0.286 244.8

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

grafico orbita





wds20002-5522b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20002-5522 B 459 BC 1991 13 95 0.3 10.98 11.07 O 200014.72-552225.0
20002-5522 B 459 BC 2015 14 197 0.3 10.98 11.07 K1IV NO 200014.72-552225.0
20002-5522 B 459 BC 2017 15 204 0.3 10.98 11.07 K1+K1 NO 200014.72-552225.0

If you need more information about this double, apply for a data request form to the WDS.