04400+2301 HU 442 (HD 29538)

 
 
04h 39m 59.09s +23° 00' 52.4" P.A. 110.00 sep 0.2 mag 9.30,9.90 Sp A2
 
 
Coord 2000 04400+2301 Discov num HU  442 Comp Coord arcsec 2000 04 39 59.09 +23 00 52.4
Date first 1901 Date last 2007 Obs 16
Pa first 334 Pa last 109.8 P.A. Now (θ) 109.8°
Sep first 0.4 Sep last 0.177 Sep. Now (ρ) 0.177"
Mag pri 9.30 Mag sec 9.90 delta mag (ΔM) 0.6 Spectral class A2 (white)
Pri motion ra +004 Sec motion ra
Pri motion dec -006 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 29538 Constellation Taurus SAO 76694 Tycho2 1830-01132-1
Gaia DR2 146496116082607616 HD 29538 ADS 3370
 
 
ORBITAL ELEMENTS
 
 
Period (P)140.23y± 3.67 Periastron (T)1997.53y± 0.98 Semi-major axis (a)0.26a± 0.017
Eccentricity (e)0.716± 0.017 Inclination (i)28.1°± 9.4 Longitude of periastron (ω)3.9°± 24.8
Node (Ω)165.6°± 21.1 Notes ReferenceHrt2009
Equinox Last observation2007 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 215.3 0.080
2001 230.7 0.087
2002 243.7 0.095
2003 254.4 0.105
2004 263.1 0.116
2005 270.4 0.127
2006 276.5 0.139
2007 281.6 0.150
2008 286.0 0.161
2009 289.9 0.172
2010 293.3 0.183
2011 296.3 0.193
2012 299.0 0.204
2013 301.5 0.214
2014 303.7 0.224
2015 305.8 0.233
2016 307.6 0.242
2017 309.4 0.251
2018 311.0 0.260
2019 312.6 0.268
2020 314.0 0.276
2021 315.4 0.284
2022 316.7 0.292
2023 317.9 0.299
2024 319.1 0.306
2025 320.2 0.313
2026 321.2 0.320
2027 322.3 0.326
2028 323.2 0.333
2029 324.2 0.339
2030 325.1 0.345


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



 
 


wds04400%2B2301a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic