00487+1841 BU 495 AB (HD 4655)

 
 
00h 48m 44.81s +18 41' 07.9" P.A. 238.00 sep 0.4 mag 8.34,8.61 Sp G0 dist. 64.1 pc (209.09 l.y.)
 
 
Coord 2000 00487+1841 Discov num BU  495 Comp AB Coord arcsec 2000 00 48 44.81 +18 41 07.9
Date first 1878 Date last 2018 Obs 165
Pa first 231 Pa last 237.8 P.A. Now (θ) 232.2°
Sep first 0.6 Sep last 0.429 Sep. Now (ρ) 0.538"
Mag pri 8.34 Mag sec 8.61 delta mag (ΔM) 0.27 Spectral class G0 (yellow)
Pri motion ra -015 Sec motion ra
Pri motion dec -051 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
00487+1841 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 4655 92095 00 48 45 +18 41 08 BU 495 AB 2018 165 238 0.4 8.34 8.61 0.27 Y <===
Show 92095 00 48 45 +18 41 08 TOK 224 AC 2015 10 139 152.3 8.34 10.83 2.49
Show 00 48 52 +18 39 13 RAO 5 Ca,Cb 2013 2 321 0.7 10.83 12.00 1.17
Quadruple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 4655 Constellation Pisces SAO 92095 HIP 3795
Tycho2 1191-01284-1 HD 4655 ADS 673 BD BD+17 105
Distance 64.1 Distance ly 209.09
 
 
ORBITAL ELEMENTS
 
 
Period (P)143.628y± 4 Periastron (T)1979.856y± 0.27 Semi-major axis (a)0.617a± 0.026
Eccentricity (e)0.5± 0.01 Inclination (i)107.4°± 4.6 Longitude of periastron (ω)338.1°± 12.4
Node (Ω)31.3°± 5.6 Notesn ReferenceSca2000b
Equinox2000 Last observation1998 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 309.0 0.168
2001 300.4 0.171
2002 292.2 0.177
2003 284.6 0.186
2004 277.9 0.198
2005 272.0 0.212
2006 266.9 0.227
2007 262.4 0.244
2008 258.5 0.261
2009 255.1 0.279
2010 252.1 0.298
2011 249.5 0.317
2012 247.2 0.336
2013 245.1 0.355
2014 243.2 0.374
2015 241.5 0.393
2016 240.0 0.412
2017 238.6 0.430
2018 237.3 0.449
2019 236.2 0.467
2020 235.1 0.485
2021 234.1 0.503
2022 233.1 0.521
2023 232.2 0.538
2024 231.4 0.555
2025 230.6 0.571
2026 229.9 0.587
2027 229.2 0.603
2028 228.5 0.618
2029 227.9 0.633
2030 227.3 0.648


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



 
 


wds00487%2B1841a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic