04170+1941 HO 328 (HD 27028)

 
 
04h 17m 01.22s +19° 40' 32.6" P.A. 358.00 sep 0.4 mag 7.38,9.06 Sp F5V dist. 84.53 pc (275.74 l.y.)
 
 
Coord 2000 04170+1941 Discov num HO  328 Comp Coord arcsec 2000 04 17 01.22 +19 40 32.6
Date first 1890 Date last 2016 Obs 96
Pa first 356 Pa last 357.5 P.A. Now (θ) 352.5°
Sep first 0.4 Sep last 0.441 Sep. Now (ρ) 0.345"
Mag pri 7.38 Mag sec 9.06 delta mag (ΔM) 1.68 Spectral class F5V (yellow-white)
Pri motion ra +001 Sec motion ra +001
Pri motion dec -101 Sec motion dec -101
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 27028 Constellation Taurus SAO 93840 HIP 19975
Tycho2 1272-00227-1 Gaia DR2 48622263902636928 HD 27028 ADS 3102
BD BD+19 689 Distance 84.53 Distance ly 275.74
 
 
ORBITAL ELEMENTS
 
 
Period (P)63.3y Periastron (T)1972.4y Semi-major axis (a)0.358a
Eccentricity (e)0.98 Inclination (i)130° Longitude of periastron (ω)263°
Node (Ω)81.8° Notesn ReferenceHei1978a
Equinox2000 Last observation1976 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 4.4 0.457
2001 4.0 0.459
2002 3.5 0.460
2003 3.1 0.461
2004 2.6 0.460
2005 2.2 0.460
2006 1.8 0.459
2007 1.3 0.457
2008 0.9 0.455
2009 0.4 0.452
2010 359.9 0.448
2011 359.5 0.444
2012 359.0 0.440
2013 358.5 0.434
2014 358.0 0.428
2015 357.5 0.422
2016 357.0 0.415
2017 356.4 0.407
2018 355.8 0.399
2019 355.2 0.389
2020 354.6 0.380
2021 353.9 0.369
2022 353.2 0.357
2023 352.5 0.345
2024 351.7 0.331
2025 350.8 0.317
2026 349.8 0.302
2027 348.7 0.285
2028 347.5 0.267
2029 346.1 0.247
2030 344.4 0.226


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



 
 


wds04170%2B1941a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic