04170+1941 HO 328 (HD 27028)

 
 
04h 17m 01.22s +19° 40' 32.6" P.A. 352.00 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 2022 Obs 98
Pa first 356 Pa last 352.4 P.A. Now (θ) 350.8°
Sep first 0.4 Sep last 0.367 Sep. Now (ρ) 0.317"
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)62.89y± 0.25 Periastron (T)1970.848y± 0.32 Semi-major axis (a)0.243a± 0.012
Eccentricity (e)0.964± 0.0032 Inclination (i)178.6°± 5.7 Longitude of periastron (ω)258.6°± 3.5
Node (Ω)82.3°± 7.6 Notesn ReferenceSca2025a
Equinox Last observation2024 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 4.6 0.476
2001 4.2 0.477
2002 3.8 0.477
2003 3.4 0.477
2004 3.0 0.476
2005 2.6 0.475
2006 2.2 0.473
2007 1.8 0.470
2008 1.4 0.467
2009 1.0 0.463
2010 0.6 0.459
2011 0.2 0.454
2012 359.7 0.448
2013 359.3 0.442
2014 358.8 0.434
2015 358.3 0.426
2016 357.8 0.418
2017 357.3 0.408
2018 356.7 0.398
2019 356.1 0.387
2020 355.5 0.375
2021 354.9 0.362
2022 354.1 0.348
2023 353.4 0.333
2024 352.5 0.316
2025 351.6 0.298
2026 350.5 0.279
2027 349.2 0.258
2028 347.8 0.235
2029 345.9 0.209
2030 343.6 0.181
2031 340.2 0.148
2032 334.8 0.110
2033 321.8 0.061
2034 69.4 0.029
2035 37.0 0.089
2036 29.4 0.131
2037 25.3 0.166
2038 22.5 0.196
2039 20.5 0.223
2040 18.8 0.247
2041 17.5 0.269
2042 16.3 0.289
2043 15.3 0.308
2044 14.4 0.325
2045 13.6 0.341
2046 12.9 0.355
2047 12.2 0.369
2048 11.6 0.381
2049 11.0 0.393
2050 10.4 0.404


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds04170%2B1941b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic