02457-3943 B  2077

 
 
02H 45M 44.77S -39 43' 01.8" P.A. 18 SEP 10.5 MAG 7.86,15.00 SP G3IV/V DIST. 64.89 PC (211.67 L.Y.)
 
 
Coord 2000
02457-3943
Discov num
B  2077
Comp
Coord arcsec 2000
02 45 44.77 -39 43 01.8
Date first
1932
Date last
1999
Obs
2
Pa first
37
Pa last
18
P.A. Now (θ)
18°
Sep first
7.0
Sep last
10.5
Sep. Now (ρ)
10.5"
Mag pri
7.86
Mag sec
15.00
delta mag (ΔM)
7.14
Spectral class
G3IV/V (yellow)
Pri motion ra
+087
Sec motion ra
Pri motion dec
+049
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Eridanus
SAO
193896
HIP
12894
Tycho2
7559-00884-1
HD
17354
CD
CD-40 716
CP
CP-40 230
Distance
64.89
Distance ly
211.67
last precise pa
18
last precise sep
10.5
 
 
ORBITAL ELEMENTS
 
 
Period (P)841d (2.3y)± 30 Periastron (T)48839d (1992.592y)± 128 Semi-major axis (a)10.1m± 1.4
Eccentricity (e)0.28± 0.17 Inclination (i)123°± 8 Longitude of periastron (ω)114°± 100
Node (Ω)285°± 94 Note Grade9(1=Definitive, 9=Indet.)
Equinox Last observation1991
label rho theta
2000-01-01 0.008 77.0
2001-01-01 0.011 304.3
2002-01-01 0.008 111.8
2003-01-01 0.009 330.4
2004-01-01 0.004 205.5
2005-01-01 0.007 15.0
2006-01-01 0.009 274.9
2007-01-01 0.008 65.3
2008-01-01 0.011 297.9
2009-01-01 0.009 100.5
2010-01-01 0.009 321.1
2011-01-01 0.004 160.8
2012-01-01 0.007 359.1
2013-01-01 0.008 264.3
2014-01-01 0.007 51.7
2015-01-01 0.011 291.6
2016-01-01 0.009 90.4
2017-01-01 0.010 313.1
2018-01-01 0.006 132.1
2019-01-01 0.008 345.1
2020-01-01 0.006 247.7
2021-01-01 0.007 36.3
2022-01-01 0.010 284.9
2023-01-01 0.008 80.1
2024-01-01 0.011 306.1
2025-01-01 0.008 115.4
2026-01-01 0.008 333.3
2027-01-01 0.004 217.5
2028-01-01 0.007 19.7
2029-01-01 0.010 277.3
2030-01-01 0.008 68.7

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