02201-0332 HDS 305Aa,Ab

 
 
02h 20m 04.95s -03 32' 05.3" P.A. 6.9 sep 0.11 mag 8.78,9.09 Sp F5 dist. 90.01 pc (293.61 l.y.)
 
 
Coord 2000
02201-0332
Discov num
HDS 305
Comp
Aa,Ab
Coord arcsec 2000
02 20 04.95 -03 32 05.3
Date first
1991
Date last
2017
Obs
6
Pa first
341
Pa last
1
P.A. Now (θ)
6.9°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.11"
Mag pri
8.78
Mag sec
9.09
delta mag (ΔM)
0.31
Spectral class
F5 (yellow-white)
Pri motion ra
-087
Sec motion ra
Pri motion dec
-046
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
02201-0332 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 02201-0332 HDS 305 Aa,Ab 1991 2017 6 7 0.1 8.78 9.09 0.31 Y <===
Show 02201-0332 HEI 887 AB 1994 1996 2 106 1.7 8.78 12.80 4.02
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
1
Precise sep
0.122
Constellation
Cetus
HIP
10885
Tycho2
4694-00994-1
HD
14473
BD
BD-04 379
Distance
90.01
Distance ly
293.61
last precise pa
1
last precise sep
0.122
 
 
ORBITAL ELEMENTS
 
 
Period (P)23.436y± 0.745 Periastron (T)1998.163y± 1.104 Semi-major axis (a)0.125a± 0.0037
Eccentricity (e)0.41± 0.026 Inclination (i)44.3°± 1.5 Longitude of periastron (ω)311.8°± 4.4
Node (Ω)165.5°± 3 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2015
label rho theta
2000 0.087 177.7
2001 0.092 197.2
2002 0.095 215.1
2003 0.098 232.0
2004 0.103 247.5
2005 0.110 261.3
2006 0.119 273.2
2007 0.128 283.6
2008 0.136 292.5
2009 0.144 300.5
2010 0.151 307.6
2011 0.156 314.3
2012 0.159 320.5
2013 0.159 326.7
2014 0.157 332.9
2015 0.151 339.5
2016 0.141 346.9
2017 0.127 355.6
2018 0.108 6.9
2019 0.085 23.9
2020 0.063 53.3
2021 0.057 100.0
2022 0.069 141.3
2023 0.083 168.2
2024 0.090 188.9
2025 0.094 207.4
2026 0.096 224.8
2027 0.101 241.0
2028 0.107 255.5
2029 0.115 268.2
2030 0.124 279.2

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

grafico orbita





wds02201-0332a.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
02201-0332 HDS 305 Aa,Ab 2004 2 257 0.1 8.78 9.09 F5 D 022004.95-033205.3
02201-0332 HDS 305 Aa,Ab 2008 3 115 0.1 8.78 9.09 F5 D 022004.95-033205.3
02201-0332 HDS 305 Aa,Ab 2015 4 345 0.1 8.78 9.09 F5 022004.95-033205.3
02201-0332 HDS 305 Aa,Ab 2017 6 1 0.1 8.78 9.09 F5 022004.95-033205.3

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