02212+2136 HU 425 Aa,Ab

 
 
02h 21m 11.45s +21° 35' 21.4" P.A. 143.00 sep 0.7 mag 10.74,11.21 Sp G8V dist. 166.67 pc (543.68 l.y.)
 
 
Coord 2000 02212+2136 Discov num HU  425 Comp Aa,Ab Coord arcsec 2000 02 21 11.45 +21 35 21.4
Date first 1901 Date last 2016 Obs 30
Pa first 25 Pa last 143.3 P.A. Now (θ) 143.3°
Sep first 0.4 Sep last 0.665 Sep. Now (ρ) 0.665"
Mag pri 10.74 Mag sec 11.21 delta mag (ΔM) 0.47 Spectral class G8V (yellow)
Pri motion ra +021 Sec motion ra
Pri motion dec -019 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
02212+2136 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 02 21 11 +21 35 21 HU 425 Aa,Ab 2016 30 143 0.7 10.74 11.21 0.47 Y <===
Show 02 21 11 +21 35 21 FMR 24 AB 2014 9 100 11.4 10.10 16.10 6.00
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Aries HIP 10959 Tycho2 1221-00800-1 Gaia DR2 99756834562343808
ADS 1796 BD BD+20 381 Distance 166.67 Distance ly 543.68
 
 
ORBITAL ELEMENTS
 
 
Period (P)125y Periastron (T)1975y Semi-major axis (a)0.355a
Eccentricity (e)0.06 Inclination (i)134° Longitude of periastron (ω)172°
Node (Ω) Notes ReferenceHei1995
Equinox2000 Last observation Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 116.8 0.257
2001 112.9 0.254
2002 109.0 0.251
2003 105.0 0.249
2004 100.9 0.248
2005 96.8 0.247
2006 92.7 0.247
2007 88.6 0.248
2008 84.5 0.249
2009 80.5 0.251
2010 76.5 0.254
2011 72.7 0.257
2012 68.9 0.260
2013 65.3 0.265
2014 61.7 0.269
2015 58.3 0.274
2016 55.0 0.279
2017 51.8 0.284
2018 48.8 0.290
2019 45.9 0.296
2020 43.0 0.302
2021 40.3 0.307
2022 37.7 0.313
2023 35.2 0.319
2024 32.8 0.325
2025 30.4 0.330
2026 28.1 0.335
2027 25.9 0.340
2028 23.8 0.345
2029 21.7 0.350
2030 19.7 0.354


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



 
 


wds02212%2B2136a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic