08542-0229 A  1754

 
 
08H 54M 10.97S -02 28' 36.9" P.A. 130.5 SEP 0.38 MAG 9.90,10.00 SP F8
 
 
Coord 2000
08542-0229
Discov num
A  1754
Comp
Coord arcsec 2000
08 54 10.97 -02 28 36.9
Date first
1908
Date last
2012
Obs
18
Pa first
113
Pa last
128
P.A. Now (θ)
130.5°
Sep first
0.5
Sep last
0.4
Sep. Now (ρ)
0.38"
Mag pri
9.90
Mag sec
10.00
delta mag (ΔM)
0.1
Spectral class
F8 (yellow-white)
Pri motion ra
-015
Sec motion ra
Pri motion dec
-017
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hydra
Tycho2
4869-00072-1
HD
76119
ADS
7077
last precise pa
128
last precise sep
0.374
 
 
ORBITAL ELEMENTS
 
 
Period (P)452y Periastron (T)1975.1y Semi-major axis (a)0.53a
Eccentricity (e)0.51 Inclination (i)46° Longitude of periastron (ω)292°
Node (Ω)115.8° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.315 111.5
2001 0.320 112.9
2002 0.324 114.2
2003 0.328 115.4
2004 0.332 116.6
2005 0.336 117.8
2006 0.340 119.0
2007 0.343 120.2
2008 0.347 121.3
2009 0.350 122.4
2010 0.354 123.5
2011 0.357 124.5
2012 0.360 125.6
2013 0.363 126.6
2014 0.366 127.6
2015 0.369 128.6
2016 0.372 129.5
2017 0.375 130.5
2018 0.378 131.4
2019 0.380 132.4
2020 0.383 133.3
2021 0.385 134.2
2022 0.387 135.1
2023 0.390 136.0
2024 0.392 136.9
2025 0.394 137.7
2026 0.396 138.6
2027 0.398 139.4
2028 0.400 140.3
2029 0.402 141.1
2030 0.404 141.9

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