00284-2020 B  1909

 
 
00H 28M 21.17S -20 20' 05.2" P.A. 169.2 SEP 0.09 MAG 7.23,7.40 SP G0V DIST. 32.2 PC (105.04 L.Y.)
 
 
Coord 2000
00284-2020
Discov num
B  1909
Comp
Coord arcsec 2000
00 28 21.17 -20 20 05.2
Date first
1929
Date last
2015
Obs
88
Pa first
119
Pa last
137
P.A. Now (θ)
169.2°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.09"
Mag pri
7.23
Mag sec
7.40
delta mag (ΔM)
0.17
Spectral class
G0V (yellow)
Pri motion ra
-116
Sec motion ra
Pri motion dec
-114
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Cetus
SAO
166296
HIP
2237
Tycho2
5846-00959-1
HD
2475
HR
108
BD
BD-21 57
Distance
32.2
Distance ly
105.04
last precise pa
137.2
last precise sep
0.156
 
 
ORBITAL ELEMENTS
 
 
Period (P)11.35y Periastron (T)1995.09y Semi-major axis (a)0.202a
Eccentricity (e)0.005 Inclination (i)69.8° Longitude of periastron (ω)99°
Node (Ω)119.49° Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.086 351.6
2001 0.088 69.9
2002 0.157 102.1
2003 0.199 115.8
2004 0.190 127.1
2005 0.133 144.0
2006 0.071 195.0
2007 0.110 265.3
2008 0.176 287.7
2009 0.202 299.8
2010 0.175 311.9
2011 0.109 334.7
2012 0.072 44.8
2013 0.134 94.7
2014 0.190 111.7
2015 0.199 123.0
2016 0.157 136.6
2017 0.087 169.2
2018 0.086 248.7
2019 0.156 282.1
2020 0.199 295.9
2021 0.190 307.2
2022 0.134 324.1
2023 0.073 13.6
2024 0.109 84.0
2025 0.175 107.0
2026 0.202 119.1
2027 0.177 131.0
2028 0.111 153.0
2029 0.071 222.4
2030 0.132 274.5

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