01071-0036 HDS 144 AB (HD 6639)

 
 
01h 07m 04.52s -00 35' 31.3" P.A. 122.00 sep 0.4 mag 9.21,11.76 Sp K0 dist. 52.44 pc (171.06 l.y.)
 
 
Coord 2000 01071-0036 Discov num HDS 144 Comp AB Coord arcsec 2000 01 07 04.52 -00 35 31.3
Date first 1991 Date last 2019 Obs 16
Pa first 308 Pa last 122.1 P.A. Now (θ) 122.1°
Sep first 0.3 Sep last 0.378 Sep. Now (ρ) 0.378"
Mag pri 9.21 Mag sec 11.76 delta mag (ΔM) 2.55 Spectral class K0 (yellow-orange)
Pri motion ra -034 Sec motion ra
Pri motion dec -029 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
01071-0036 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 6639 129127 01 07 05 -00 35 31 HDS 144 AB 2019 16 122 0.4 9.21 11.76 2.55 Y <===
Show 129127 01 07 05 -00 35 31 BAG 12 AC 2019 12 147 1.4 9.21 12.18 2.97
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 6639 Constellation Cetus SAO 129127 HIP 5245
Tycho2 4681-00667-1 HD 6639 BD BD-01 147 Distance 52.44
Distance ly 171.06
 
 
ORBITAL ELEMENTS
 
 
Period (P)72.6y Periastron (T)2073.1y Semi-major axis (a)0.365a
Eccentricity (e)0.237 Inclination (i)138.2° Longitude of periastron (ω)30°
Node (Ω)281.9° Notes ReferenceTok2014a
Equinox2000 Last observation2013 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 262.0 0.267
2001 255.1 0.258
2002 247.7 0.250
2003 239.8 0.242
2004 231.3 0.235
2005 222.4 0.229
2006 213.1 0.226
2007 203.7 0.226
2008 194.4 0.228
2009 185.5 0.234
2010 177.0 0.242
2011 169.2 0.253
2012 162.0 0.265
2013 155.5 0.278
2014 149.6 0.292
2015 144.3 0.307
2016 139.4 0.321
2017 135.0 0.335
2018 130.9 0.349
2019 127.1 0.362
2020 123.6 0.374
2021 120.3 0.385
2022 117.1 0.396
2023 114.1 0.405
2024 111.3 0.413
2025 108.5 0.420
2026 105.9 0.426
2027 103.3 0.431
2028 100.7 0.435
2029 98.2 0.438
2030 95.7 0.440


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



 
 


wds01071-0036c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic