10116+1321 HU  874 (34 Leo)

 
 
10H 11M 38.19S +13 21' 18.7" P.A. 285.3 SEP 0.23 MAG 6.90,7.87 SP F6V DIST. 64.6 PC (210.73 L.Y.)
 
 
Coord 2000
10116+1321
Discov num
HU  874
Comp
Coord arcsec 2000
10 11 38.19 +13 21 18.7
Date first
1905
Date last
2014
Obs
69
Pa first
289
Pa last
285
P.A. Now (θ)
285.3°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.23"
Mag pri
6.90
Mag sec
7.87
delta mag (ΔM)
0.97
Spectral class
F6V (yellow-white)
Pri motion ra
+034
Sec motion ra
Pri motion dec
-038
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
34 Leo
Constellation
Leo
SAO
98991
HIP
49929
Tycho2
0836-01522-1
HD
88355
HR
3998
GC
13999
ADS
7674
BD
BD+14 2217
Flamsteed
34 Leonis
Flamsteed name
34 Leo
Distance
64.6
Distance ly
210.73
last precise pa
285.3
last precise sep
0.228
 
 
ORBITAL ELEMENTS
 
 
Period (P)20.5y± 1 Periastron (T)1986.01y± 0.11 Semi-major axis (a)0.155a± 0.0075
Eccentricity (e)0.95± 0.015 Inclination (i)80.9°± 2 Longitude of periastron (ω)319.7°± 3.9
Node (Ω)112.8°± 1.2 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.229 286.6
2001 0.219 287.0
2002 0.206 287.5
2003 0.186 288.0
2004 0.160 288.7
2005 0.123 289.7
2006 0.063 292.2
2007 0.016 257.1
2008 0.063 276.2
2009 0.100 279.5
2010 0.130 281.1
2011 0.155 282.1
2012 0.176 282.9
2013 0.194 283.5
2014 0.208 284.0
2015 0.220 284.4
2016 0.228 284.9
2017 0.234 285.3
2018 0.236 285.6
2019 0.236 286.0
2020 0.232 286.4
2021 0.224 286.8
2022 0.213 287.2
2023 0.197 287.7
2024 0.174 288.3
2025 0.143 289.1
2026 0.098 290.6
2027 0.004 96.4
2028 0.041 272.3
2029 0.082 278.2
2030 0.116 280.4

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