13284+1543 STT 266

 
 
13H 28M 26.68S +15 42' 30.5" P.A. 357.9 SEP 2 MAG 7.97,8.42 SP F5 DIST. 50.99 PC (166.33 L.Y.)
 
 
Coord 2000
13284+1543
Discov num
STT 266
Comp
Coord arcsec 2000
13 28 26.68 +15 42 30.5
Date first
1843
Date last
2016
Obs
210
Pa first
328
Pa last
357
P.A. Now (θ)
357.9°
Sep first
1.0
Sep last
2.0
Sep. Now (ρ)
2"
Mag pri
7.97
Mag sec
8.42
delta mag (ΔM)
0.45
Spectral class
F5 (yellow-white)
Pri motion ra
-057
Sec motion ra
-057
Pri motion dec
+013
Sec motion dec
+013
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Coma Berenices
SAO
100583
HIP
65725
Tycho2
1458-00684-1
HD
117190
ADS
8914
BD
BD+16 2513
Distance
50.99
Distance ly
166.33
last precise pa
357.1
last precise sep
2.031
 
 
ORBITAL ELEMENTS
 
 
Period (P)1954.11y Periastron (T)1852.79y Semi-major axis (a)3.384a
Eccentricity (e)0.502 Inclination (i)72.8° Longitude of periastron (ω)132.1°
Node (Ω)166.4° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2011
label rho theta
2000 2.015 355.5
2001 2.015 355.6
2002 2.014 355.8
2003 2.013 355.9
2004 2.012 356.0
2005 2.011 356.2
2006 2.011 356.3
2007 2.010 356.4
2008 2.009 356.6
2009 2.008 356.7
2010 2.006 356.9
2011 2.005 357.0
2012 2.004 357.1
2013 2.003 357.3
2014 2.001 357.4
2015 2.000 357.5
2016 1.999 357.7
2017 1.997 357.8
2018 1.996 357.9
2019 1.994 358.1
2020 1.993 358.2
2021 1.991 358.3
2022 1.989 358.5
2023 1.987 358.6
2024 1.986 358.7
2025 1.984 358.9
2026 1.982 359.0
2027 1.980 359.2
2028 1.978 359.3
2029 1.976 359.4
2030 1.974 359.6

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