02278+0426 A  2329

 
 
02H 27M 45.86S +04 25' 55.9" P.A. 88.6 SEP 0.33 MAG 9.45,9.63 SP K5 DIST. 17.14 PC (55.91 L.Y.)
 
 
Coord 2000
02278+0426
Discov num
A  2329
Comp
Coord arcsec 2000
02 27 45.86 +04 25 55.9
Date first
1911
Date last
2014
Obs
111
Pa first
300
Pa last
1
P.A. Now (θ)
88.6°
Sep first
0.4
Sep last
0.1
Sep. Now (ρ)
0.33"
Mag pri
9.45
Mag sec
9.63
delta mag (ΔM)
0.18
Spectral class
K5 (yellow-orange)
Pri motion ra
+141
Sec motion ra
Pri motion dec
+208
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Cetus
HIP
11452
HD
15285
ADS
1865
GL
Gl 98A
BD
BD+03 339
Distance
17.14
Distance ly
55.91
last precise pa
0.9
last precise sep
0.133
 
 
ORBITAL ELEMENTS
 
 
Period (P)25.32y± 0.4 Periastron (T)1988.16y± 1.2 Semi-major axis (a)0.559a± 0.012
Eccentricity (e)0.237± 0.002 Inclination (i)73.3°± 3.5 Longitude of periastron (ω)233.2°± 10
Node (Ω)108.7°± 2 Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation2000
label rho theta
2000 0.501 125.2
2001 0.430 130.9
2002 0.351 139.1
2003 0.271 152.1
2004 0.208 174.6
2005 0.188 208.1
2006 0.226 238.5
2007 0.296 257.2
2008 0.369 268.5
2009 0.430 276.3
2010 0.466 282.4
2011 0.465 288.1
2012 0.420 294.3
2013 0.329 303.1
2014 0.210 320.9
2015 0.128 13.2
2016 0.200 69.5
2017 0.326 88.6
2018 0.441 97.1
2019 0.529 102.4
2020 0.589 106.3
2021 0.622 109.7
2022 0.629 112.8
2023 0.612 116.0
2024 0.576 119.5
2025 0.522 123.6
2026 0.454 128.9
2027 0.377 136.1
2028 0.296 147.2
2029 0.225 166.1
2030 0.188 196.8

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