00427-6537 I 440 (HD 4125)

 
 
00h 42m 41.37s -65 36' 30.6" P.A. 269.00 sep 0.4 mag 7.27,8.75 Sp A6V dist. 177.3 pc (578.35 l.y.)
 
 
Coord 2000 00427-6537 Discov num I   440 Comp Coord arcsec 2000 00 42 41.37 -65 36 30.6
Date first 1907 Date last 2009 Obs 17
Pa first 220 Pa last 269.4 P.A. Now (θ) 269.4°
Sep first 0.4 Sep last 0.402 Sep. Now (ρ) 0.402"
Mag pri 7.27 Mag sec 8.75 delta mag (ΔM) 1.48 Spectral class A6V (white)
Pri motion ra +038 Sec motion ra +038
Pri motion dec -003 Sec motion dec -003
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 4125 Constellation Tucana SAO 248239 HIP 3351
Tycho2 8847-00332-1 HD 4125 GC 855 CP CP-66 50
Distance 177.3 Distance ly 578.35
 
 
ORBITAL ELEMENTS
 
 
Period (P)196y Periastron (T)2142y Semi-major axis (a)0.274a
Eccentricity (e)0.65 Inclination (i)157° Longitude of periastron (ω)344°
Node (Ω)57° Notesn ReferenceHrt2010a
Equinox2000 Last observation2009 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 275.8 0.372
2001 275.1 0.375
2002 274.4 0.378
2003 273.7 0.382
2004 273.1 0.385
2005 272.4 0.388
2006 271.8 0.391
2007 271.2 0.394
2008 270.6 0.397
2009 269.9 0.399
2010 269.3 0.402
2011 268.8 0.405
2012 268.2 0.407
2013 267.6 0.410
2014 267.0 0.412
2015 266.5 0.414
2016 265.9 0.417
2017 265.3 0.419
2018 264.8 0.421
2019 264.3 0.423
2020 263.7 0.425
2021 263.2 0.427
2022 262.7 0.429
2023 262.1 0.430
2024 261.6 0.432
2025 261.1 0.433
2026 260.6 0.435
2027 260.1 0.436
2028 259.6 0.438
2029 259.1 0.439
2030 258.6 0.440


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



 
 


wds00427-6537a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic