09279+3128 HO  366AB

 
 
09H 27M 54.30S +31 27' 54.1" P.A. 278.4 SEP 0.19 MAG 9.40,9.80 SP G0
 
 
Coord 2000
09279+3128
Discov num
HO  366
Comp
AB
Coord arcsec 2000
09 27 54.30 +31 27 54.1
Date first
1891
Date last
1997
Obs
33
Pa first
10
Pa last
136
P.A. Now (θ)
278.4°
Sep first
0.5
Sep last
0.1
Sep. Now (ρ)
0.19"
Mag pri
9.40
Mag sec
9.80
delta mag (ΔM)
0.4
Spectral class
G0 (yellow)
Pri motion ra
-012
Sec motion ra
Pri motion dec
-068
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
09279+3128 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 61504 09279+3128 HO 366 AB 1891 1997 33 278 0.2 9.40 9.80 0.40 Y <===
Show 61504 09279+3128 HO 366 AB,C 1891 2001 5 60 52.8 8.87 12.34 3.47
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Leo
SAO
61504
Tycho2
2494-00727-1
HD
81656
ADS
7384
last precise pa
136
last precise sep
0.122
 
 
ORBITAL ELEMENTS
 
 
Period (P)353.11y Periastron (T)2001.3y Semi-major axis (a)0.404a
Eccentricity (e)0.764 Inclination (i)19.4° Longitude of periastron (ω)166.1°
Node (Ω)9.8° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation1997
label rho theta
2000 0.096 162.1
2001 0.095 173.3
2002 0.096 184.5
2003 0.098 195.3
2004 0.101 205.6
2005 0.105 215.1
2006 0.110 223.9
2007 0.116 231.8
2008 0.122 238.9
2009 0.129 245.3
2010 0.136 251.0
2011 0.144 256.2
2012 0.151 260.9
2013 0.159 265.1
2014 0.167 268.9
2015 0.175 272.3
2016 0.183 275.5
2017 0.190 278.4
2018 0.198 281.1
2019 0.206 283.6
2020 0.214 285.9
2021 0.221 288.0
2022 0.229 290.0
2023 0.236 291.9
2024 0.244 293.7
2025 0.251 295.3
2026 0.258 296.9
2027 0.265 298.4
2028 0.272 299.8
2029 0.279 301.1
2030 0.286 302.4

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