03261+1229 A 829 (HD 21261)

 
 
03h 26m 08.81s +12° 28' 54.7" P.A. 34.00 sep 0.5 mag 8.82,10.38 Sp G0 dist. 68.73 pc (224.2 l.y.)
 
 
Coord 2000 03261+1229 Discov num A   829 Comp Coord arcsec 2000 03 26 08.81 +12 28 54.7
Date first 1904 Date last 2022 Obs 27
Pa first 41 Pa last 33.9 P.A. Now (θ) 30.9° (calc)
Sep first 0.3 Sep last 0.488 Sep. Now (ρ) 0.425" (calc)
Mag pri 8.82 Mag sec 10.38 delta mag (ΔM) 1.56 Spectral class G0 (yellow)
Pri motion ra -072 Sec motion ra
Pri motion dec -023 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 21261 Constellation Taurus SAO 93433 HIP 16008
Tycho2 0653-00556-1 Gaia DR2 16823940949244160 HD 21261 ADS 2531
BD BD+11 474 Distance 68.73 Distance ly 224.2
 
 
ORBITAL ELEMENTS
 
 
Period (P)111.38y± 3.93 Periastron (T)1985.1y± 0.79 Semi-major axis (a)0.417a± 0.012
Eccentricity (e)0.743± 0.018 Inclination (i)120.6°± 2 Longitude of periastron (ω)77.2°± 1.9
Node (Ω)260.1°± 2.4 Notesn ReferenceHrt2008
Equinox2000 Last observation2003 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 60.0 0.364
2001 58.6 0.372
2002 57.3 0.380
2003 56.0 0.386
2004 54.7 0.392
2005 53.5 0.398
2006 52.3 0.403
2007 51.1 0.407
2008 50.0 0.411
2009 48.8 0.414
2010 47.7 0.417
2011 46.6 0.420
2012 45.5 0.422
2013 44.5 0.424
2014 43.4 0.425
2015 42.4 0.427
2016 41.3 0.428
2017 40.3 0.428
2018 39.2 0.429
2019 38.2 0.429
2020 37.1 0.429
2021 36.1 0.429
2022 35.1 0.429
2023 34.0 0.428
2024 33.0 0.427
2025 31.9 0.426
2026 30.9 0.425
2027 29.8 0.424
2028 28.7 0.423
2029 27.7 0.421
2030 26.6 0.419
2031 25.5 0.418
2032 24.4 0.416
2033 23.3 0.414
2034 22.1 0.412
2035 21.0 0.409
2036 19.9 0.407
2037 18.7 0.405
2038 17.5 0.402
2039 16.3 0.400
2040 15.1 0.397
2041 13.9 0.395
2042 12.7 0.392
2043 11.4 0.389
2044 10.1 0.386
2045 8.8 0.383
2046 7.5 0.381
2047 6.2 0.378
2048 4.8 0.375
2049 3.5 0.372
2050 2.1 0.369


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds03261%2B1229b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic