11425+2355 COU 390 (HD 101728)

 
 
11h 42m 30.32s +23° 54' 22.9" P.A. 102.00 sep 0.4 mag 9.27,11.66 Sp G5 dist. 45.72 pc (149.14 l.y.)
 
 
Coord 2000 11425+2355 Discov num COU 390 Comp Coord arcsec 2000 11 42 30.32 +23 54 22.9
Date first 1969 Date last 2018 Obs 17
Pa first 161 Pa last 102.1 P.A. Now (θ) 102.1°
Sep first 0.8 Sep last 0.41 Sep. Now (ρ) 0.41"
Mag pri 9.27 Mag sec 11.66 delta mag (ΔM) 2.39 Spectral class G5 (yellow)
Pri motion ra +058 Sec motion ra
Pri motion dec +085 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 101728 Constellation Leo SAO 81950 HIP 57112
Tycho2 1982-01889-1 Gaia DR2 4004906065484563200 HD 101728 BD BD+24 2384
Distance 45.72 Distance ly 149.14
 
 
ORBITAL ELEMENTS
 
 
Period (P)92.75y± 5.57 Periastron (T)2007.86y± 0.28 Semi-major axis (a)0.5498a± 0.0168
Eccentricity (e)0.786± 0.014 Inclination (i)43.6°± 3.2 Longitude of periastron (ω)100.9°± 2.7
Node (Ω)231.4°± 3.2 Notes ReferenceTok2016e
Equinox2000 Last observation Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 209.1 0.403
2001 212.6 0.374
2002 216.6 0.342
2003 221.6 0.306
2004 228.1 0.266
2005 237.1 0.218
2006 251.7 0.164
2007 282.1 0.107
2008 345.8 0.089
2009 31.4 0.135
2010 52.2 0.185
2011 64.6 0.227
2012 73.4 0.262
2013 80.2 0.293
2014 85.8 0.320
2015 90.5 0.345
2016 94.7 0.367
2017 98.3 0.388
2018 101.7 0.408
2019 104.7 0.427
2020 107.4 0.444
2021 110.0 0.461
2022 112.4 0.476
2023 114.7 0.491
2024 116.8 0.505
2025 118.8 0.519
2026 120.7 0.532
2027 122.5 0.545
2028 124.2 0.557
2029 125.9 0.568
2030 127.5 0.579


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



 
 


wds11425%2B2355a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic