10017+1725 RUC   7 (XY Leo)

 
 
10H 01M 40.39S +17 24' 33.2" P.A. 91 SEP 0.1 MAG 9.45, SP K0V+K6V DIST. 72.31 PC (235.88 L.Y.)
 
 
Coord 2000
10017+1725
Discov num
RUC   7
Comp
Coord arcsec 2000
10 01 40.39 +17 24 33.2
Date first
1998
Date last
1998
Obs
1
Pa first
91
Pa last
91
P.A. Now (θ)
91°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.1"
Mag pri
9.45
Mag sec
delta mag (ΔM)
Spectral class
K0V+K6V (yellow-orange/yellow-orange)
Pri motion ra
+063
Sec motion ra
Pri motion dec
-053
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name
XY Leo
Constellation
Leo
HIP
49136
Tycho2
1412-00680-1
BD
BD+18 2307
Distance
72.31
Distance ly
235.88
last precise pa
91
last precise sep
0.061
 
 
ORBITAL ELEMENTS SOLUTION #1
 
 
Period (P)19.59y± 0.06 Periastron (T)35341d (1955.636y)± 284 Semi-major axis (a)55.6m± 0.3
Eccentricity (e)0.12± 0.02 Inclination (i)94.4°± 0.2 Longitude of periastron (ω)247.3°± 0.2
Node (Ω)356°± 14 Note Grade9(1=Definitive, 9=Indet.)
Equinox Last observation2002
label rho theta
2000 0.057 356.3
2001 0.057 355.0
2002 0.053 353.6
2003 0.045 351.8
2004 0.033 348.9
2005 0.019 341.9
2006 0.005 294.5
2007 0.014 194.9
2008 0.028 184.1
2009 0.041 180.4
2010 0.049 178.3
2011 0.053 176.6
2012 0.050 175.0
2013 0.041 173.0
2014 0.026 169.1
2015 0.008 149.5
2016 0.013 12.7
2017 0.031 2.0
2018 0.045 358.9
2019 0.054 357.1
2020 0.058 355.8
2021 0.056 354.5
2022 0.050 352.9
2023 0.040 350.8
2024 0.027 346.9
2025 0.013 334.6
2026 0.006 225.8
2027 0.020 188.6
2028 0.034 182.3
2029 0.045 179.4
2030 0.051 177.6

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
 
 
ORBITAL ELEMENTS SOLUTION #2
 
 
Period (P)19.59y± 5 Periastron (T) Semi-major axis (a)140m
Eccentricity (e)0.09± 0.03 Inclination (i)65.8° Longitude of periastron (ω)°
Node (Ω)° Note Grade7(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 0.106 18.8
2001 0.081 35.9
2002 0.060 67.2
2003 0.061 110.8
2004 0.084 140.5
2005 0.111 156.4
2006 0.133 166.3
2007 0.148 173.7
2008 0.153 180.2
2009 0.147 186.6
2010 0.132 194.1
2011 0.109 204.2
2012 0.082 220.5
2013 0.060 251.2
2014 0.061 294.8
2015 0.082 325.2
2016 0.107 341.9
2017 0.123 352.9
2018 0.127 2.1
2019 0.117 11.8
2020 0.096 24.7
2021 0.071 46.5
2022 0.057 85.1
2023 0.069 125.3
2024 0.095 148.1
2025 0.121 160.9
2026 0.140 169.5
2027 0.151 176.4
2028 0.152 182.8
2029 0.142 189.5
2030 0.124 197.8

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

grafico orbita