12579+4948 HU 641 (HD 233997)

 
 
12h 57m 53.94s +49° 48' 16.8" P.A. 300.00 sep 0.1 mag 10.30,10.30 Sp K3III
 
 
Coord 2000 12579+4948 Discov num HU  641 Comp Coord arcsec 2000 12 57 53.94 +49 48 16.8
Date first 1903 Date last 2007 Obs 8
Pa first 190 Pa last 300.1 P.A. Now (θ) 300.1°
Sep first 0.4 Sep last 0.138 Sep. Now (ρ) 0.138"
Mag pri 10.30 Mag sec 10.30 delta mag (ΔM) 0 Spectral class K3III (yellow-orange)
Pri motion ra +002 Sec motion ra
Pri motion dec -001 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 233997 Constellation Canes Venatici SAO 28581 Tycho2 3461-02425-1
Gaia DR2 1555775078898034944 HD 233997 ADS 8718
 
 
ORBITAL ELEMENTS
 
 
Period (P)323.48y Periastron (T)1963.41y Semi-major axis (a)0.366a
Eccentricity (e)0.51 Inclination (i)140.8° Longitude of periastron (ω)357.8°
Node (Ω)58.3° Notesn ReferenceErc1986b
Equinox Last observation1980 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 319.1 0.230
2001 317.2 0.234
2002 315.4 0.238
2003 313.7 0.242
2004 312.0 0.246
2005 310.4 0.250
2006 308.8 0.254
2007 307.3 0.258
2008 305.8 0.262
2009 304.4 0.266
2010 303.0 0.270
2011 301.7 0.274
2012 300.4 0.279
2013 299.1 0.283
2014 297.9 0.287
2015 296.7 0.291
2016 295.6 0.296
2017 294.4 0.300
2018 293.3 0.304
2019 292.3 0.308
2020 291.3 0.313
2021 290.3 0.317
2022 289.3 0.321
2023 288.3 0.325
2024 287.4 0.329
2025 286.5 0.334
2026 285.6 0.338
2027 284.8 0.342
2028 283.9 0.346
2029 283.1 0.350
2030 282.3 0.354


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



 
 


wds12579%2B4948a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic