11520+4805 HU 731 (MY UMa)

 
 
11h 51m 57.86s +48° 05' 19.5" P.A. 305.00 sep 1.3 mag 9.81,9.68 Sp K0V dist. 46.1 pc (150.38 l.y.)
 
 
Coord 2000 11520+4805 Discov num HU  731 Comp Coord arcsec 2000 11 51 57.86 +48 05 19.5
Date first 1902 Date last 2019 Obs 63
Pa first 296 Pa last 304.8 P.A. Now (θ) 304.8°
Sep first 0.3 Sep last 1.26 Sep. Now (ρ) 1.26"
Mag pri 9.81 Mag sec 9.68 delta mag (ΔM) 0.13 Spectral class K0V (yellow-orange)
Pri motion ra -217 Sec motion ra -217
Pri motion dec +047 Sec motion dec +047
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name MY UMa Constellation Ursa Major HIP 57859 Tycho2 3452-01353-1
Gaia DR2 786765410803908096 ADS 8325 BD BD+48 1978 Distance 46.1
Distance ly 150.38
 
 
ORBITAL ELEMENTS
 
 
Period (P)207.77y± 38.24 Periastron (T)1900.83y± 2 Semi-major axis (a)1.179a± 0.046
Eccentricity (e)0.705± 0.033 Inclination (i)96.6°± 1 Longitude of periastron (ω)301.1°± 7.8
Node (Ω)118.7°± 1.9 Notes ReferenceHrt2008
Equinox2000 Last observation2003 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 310.4 0.997
2001 310.2 1.010
2002 310.0 1.023
2003 309.8 1.036
2004 309.6 1.048
2005 309.4 1.061
2006 309.3 1.073
2007 309.1 1.085
2008 308.9 1.096
2009 308.8 1.108
2010 308.6 1.119
2011 308.5 1.131
2012 308.3 1.142
2013 308.2 1.152
2014 308.0 1.163
2015 307.9 1.173
2016 307.7 1.183
2017 307.6 1.193
2018 307.4 1.203
2019 307.3 1.213
2020 307.2 1.222
2021 307.0 1.231
2022 306.9 1.240
2023 306.8 1.248
2024 306.7 1.257
2025 306.5 1.265
2026 306.4 1.273
2027 306.3 1.280
2028 306.2 1.288
2029 306.1 1.295
2030 305.9 1.301


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



 
 


wds11520%2B4805a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic