10116+1321 HU 874 (34 Leo)

 
 
10h 11m 38.19s +13 21' 18.7" P.A. 291.00 sep 0.1 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 2021 Obs 78
Pa first 289 Pa last 291.4 P.A. Now (θ) 271.7°
Sep first 0.2 Sep last 0.076 Sep. Now (ρ) 0.043"
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 Gaia DR2 3881744167420534528 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
 
 
ORBITAL ELEMENTS
 
 
Period (P)17.974y± 0.03 Periastron (T)2003.81y± 0.09 Semi-major axis (a)0.1528a± 0.0055
Eccentricity (e)0.928± 0.006 Inclination (i)82.4°± 0.8 Longitude of periastron (ω)317.9°± 2.6
Node (Ω)111.6°± 0.6 Notesn ReferenceTok2020e
Equinox Last observation Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 287.3 0.198
2001 287.9 0.175
2002 288.8 0.142
2003 290.6 0.090
2004 131.4 0.012
2005 271.4 0.042
2006 277.8 0.083
2007 280.2 0.116
2008 281.6 0.144
2009 282.5 0.168
2010 283.3 0.187
2011 283.9 0.202
2012 284.4 0.214
2013 284.9 0.221
2014 285.3 0.226
2015 285.8 0.226
2016 286.3 0.221
2017 286.7 0.212
2018 287.3 0.197
2019 288.0 0.175
2020 288.9 0.141
2021 290.6 0.088
2022 136.0 0.011
2023 271.7 0.043
2024 277.9 0.084
2025 280.3 0.117
2026 281.6 0.145
2027 282.5 0.168
2028 283.3 0.187
2029 283.9 0.202
2030 284.4 0.214


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



 
 


wds10116%2B1321c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic