02539-4436 I  1480

 
 
02H 53M 51.15S -44 36' 20.4" P.A. 110.5 SEP 0.37 MAG 7.95,9.76 SP K0:III+ DIST. 70.97 PC (231.5 L.Y.)
 
 
Coord 2000
02539-4436
Discov num
I  1480
Comp
Coord arcsec 2000
02 53 51.15 -44 36 20.4
Date first
1927
Date last
2015
Obs
17
Pa first
126
Pa last
106
P.A. Now (θ)
110.5°
Sep first
0.4
Sep last
0.3
Sep. Now (ρ)
0.37"
Mag pri
7.95
Mag sec
9.76
delta mag (ΔM)
1.81
Spectral class
K0:III+ (yellow-orange)
Pri motion ra
+102
Sec motion ra
+102
Pri motion dec
+060
Sec motion dec
+060
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
106.2
Precise sep
0.32
Constellation
Eridanus
SAO
216086
HIP
13498
Tycho2
7566-00827-1
HD
18198
CD
CD-45 946
CP
CP-45 288
Distance
70.97
Distance ly
231.5
last precise pa
106.2
last precise sep
0.32
 
 
ORBITAL ELEMENTS
 
 
Period (P)51.46y± 0.82 Periastron (T)2007.24y± 0.14 Semi-major axis (a)0.2967a± 0.0044
Eccentricity (e)0.774± 0.013 Inclination (i)49.5°± 1.9 Longitude of periastron (ω)16.2°± 1.7
Node (Ω)298.3°± 1.3 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2015
label rho theta
2000 0.252 158.6
2001 0.223 163.1
2002 0.191 169.0
2003 0.159 177.3
2004 0.126 190.0
2005 0.095 211.3
2006 0.076 247.3
2007 0.069 295.6
2008 0.057 2.8
2009 0.088 58.0
2010 0.136 79.2
2011 0.181 89.4
2012 0.221 95.8
2013 0.258 100.2
2014 0.291 103.5
2015 0.320 106.3
2016 0.347 108.5
2017 0.370 110.5
2018 0.392 112.3
2019 0.411 113.8
2020 0.429 115.3
2021 0.445 116.6
2022 0.458 117.8
2023 0.471 119.0
2024 0.481 120.1
2025 0.490 121.2
2026 0.498 122.2
2027 0.504 123.2
2028 0.509 124.2
2029 0.513 125.2
2030 0.515 126.2

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