12520-2648 B   234

 
 
12h 51m 55.76s -26 47' 23.2" P.A. 295.5 sep 0.6 mag 10.29,10.26
 
 
Coord 2000
12520-2648
Discov num
B   234
Comp
Coord arcsec 2000
12 51 55.76 -26 47 23.2
Date first
1926
Date last
1991
Obs
13
Pa first
306
Pa last
281
P.A. Now (θ)
295.5°
Sep first
0.6
Sep last
0.4
Sep. Now (ρ)
0.6"
Mag pri
10.29
Mag sec
10.26
delta mag (ΔM)
0.03
Spectral class
Pri motion ra
-104
Sec motion ra
-104
Pri motion dec
+032
Sec motion dec
+032
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
281
Precise sep
0.4
Constellation
Hydra
Tycho2
6705-00547-1
ADS
8689
last precise pa
281
last precise sep
0.4
 
 
ORBITAL ELEMENTS
 
 
Period (P)122y Periastron (T)1972y Semi-major axis (a)0.357a
Eccentricity (e)0.88 Inclination (i)43° Longitude of periastron (ω)335°
Node (Ω)139.7° Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation1984
label rho theta
2000 0.479 288.0
2001 0.489 288.5
2002 0.498 289.1
2003 0.507 289.6
2004 0.515 290.1
2005 0.523 290.6
2006 0.531 291.0
2007 0.538 291.5
2008 0.546 291.9
2009 0.552 292.4
2010 0.559 292.8
2011 0.566 293.2
2012 0.572 293.6
2013 0.578 294.0
2014 0.583 294.4
2015 0.588 294.8
2016 0.594 295.2
2017 0.598 295.5
2018 0.603 295.9
2019 0.607 296.2
2020 0.611 296.6
2021 0.615 296.9
2022 0.619 297.3
2023 0.622 297.6
2024 0.625 298.0
2025 0.628 298.3
2026 0.631 298.6
2027 0.633 298.9
2028 0.635 299.3
2029 0.637 299.6
2030 0.639 299.9

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





wds12520-2648a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
12520-2648 B 234 1991 13 281 0.4 10.29 10.26 NO 125155.76-264723.2

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