00321-1218 HDS  71

 
 
00H 32M 07.04S -12 17' 42.1" P.A. 296.8 SEP 0.29 MAG 8.97,9.46 SP G1V DIST. 69.11 PC (225.44 L.Y.)
 
 
Coord 2000
00321-1218
Discov num
HDS  71
Comp
Coord arcsec 2000
00 32 07.04 -12 17 42.1
Date first
1991
Date last
2014
Obs
16
Pa first
23
Pa last
305
P.A. Now (θ)
296.8°
Sep first
0.1
Sep last
0.3
Sep. Now (ρ)
0.29"
Mag pri
8.97
Mag sec
9.46
delta mag (ΔM)
0.49
Spectral class
G1V (yellow)
Pri motion ra
+049
Sec motion ra
Pri motion dec
-027
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Cetus
SAO
147326
HIP
2532
Tycho2
5271-00803-1
HD
2893
BD
BD-13 89
Distance
69.11
Distance ly
225.44
last precise pa
305.2
last precise sep
0.314
 
 
ORBITAL ELEMENTS
 
 
Period (P)57.943y± 1.966 Periastron (T)2034.432y± 0.95 Semi-major axis (a)0.2666a± 0.0038
Eccentricity (e)0.233± 0.096 Inclination (i)132.3°± 7.9 Longitude of periastron (ω)325.3°± 21
Node (Ω)126.6°± 9.7 Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2008
label rho theta
2000 0.253 352.3
2001 0.262 348.0
2002 0.271 343.9
2003 0.280 340.1
2004 0.288 336.5
2005 0.295 333.1
2006 0.301 329.9
2007 0.307 326.7
2008 0.311 323.7
2009 0.315 320.8
2010 0.317 317.9
2011 0.317 315.0
2012 0.317 312.1
2013 0.315 309.2
2014 0.311 306.3
2015 0.307 303.2
2016 0.300 300.1
2017 0.292 296.8
2018 0.283 293.3
2019 0.273 289.6
2020 0.261 285.5
2021 0.247 281.0
2022 0.233 276.0
2023 0.218 270.4
2024 0.203 263.9
2025 0.188 256.3
2026 0.174 247.5
2027 0.163 237.3
2028 0.154 225.7
2029 0.149 213.0
2030 0.149 199.9

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