09036+4709 A 1585 (Alkaphrah)

09h 03m 37.56s +47° 09' 24.0" P.A. 278.00 sep 0.3 mag 4.16,4.54 Sp A1V dist. 109.89 pc (358.46 l.y.)

Coord 2000 09036+4709 Discov num A  1585 Comp Coord arcsec 2000 09 03 37.56 +47 09 24.0
Date first 1907 Date last 2019 Obs 206
Pa first 283 Pa last 277.7 P.A. Now (θ) 275.6°
Sep first 0.2 Sep last 0.27 Sep. Now (ρ) 0.213"
Mag pri 4.16 Mag sec 4.54 delta mag (ΔM) 0.38 Spectral class A1V (white)
Pri motion ra -033 Sec motion ra
Pri motion dec -054 Sec motion dec
Notes N O (See Notes, Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Common name Alkaphrah Var name NSV4357 UMa Constellation Ursa Major SAO 42661
HIP 44471 Tycho2 3424-01626-1 HD 77327 HR 3594
GC 12503 ADS 7158 BD BD+47 1633 Bayer Kappa Ursae Majoris
Bayer name Kap UMa Flamsteed 12 Ursae Majoris Flamsteed name 12 UMa FK5 341
Distance 109.89 Distance ly 358.46 Bayer greek κ UMa
Other names Talitha australis, Alkafzah, El Koprah
Meaning leap (of the gazelle)




ORBITAL ELEMENTS

Period (P)13007.2d (35.61y)± 9.7 Periastron (T)50404m (1996.879y)± 12 Semi-major axis (a)0.18194a± 0.00025
Eccentricity (e)0.5584± 0.0015 Inclination (i)109.41°± 0.066 Longitude of periastron (ω)355.63°± 0.36
Node (Ω)105.641°± 0.08 Notesn ReferenceMut2010b
Equinox2000 Last observation2008 Grade2(1=Definitive, 9=Indet.)

label theta rho
2000 18.4 0.043
2001 340.3 0.060
2002 322.3 0.087
2003 313.0 0.115
2004 307.4 0.141
2005 303.4 0.166
2006 300.5 0.188
2007 298.1 0.208
2008 296.2 0.225
2009 294.5 0.240
2010 293.0 0.253
2011 291.6 0.264
2012 290.3 0.272
2013 289.1 0.278
2014 287.9 0.281
2015 286.7 0.283
2016 285.6 0.282
2017 284.4 0.280
2018 283.2 0.274
2019 282.0 0.267
2020 280.6 0.257
2021 279.1 0.245
2022 277.5 0.230
2023 275.6 0.213
2024 273.4 0.192
2025 270.6 0.169
2026 266.8 0.144
2027 261.2 0.115
2028 251.8 0.085
2029 231.7 0.055
2030 184.3 0.039


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



 
 


wds09036%2B4709a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic