00251+4803 HDS  56AB

 
 
00H 25M 08.74S +48 02' 51.0" P.A. 258.3 SEP 0.32 MAG 7.72,10.63 SP F8 DIST. 43.82 PC (142.94 L.Y.)
 
 
Coord 2000
00251+4803
Discov num
HDS  56
Comp
AB
Coord arcsec 2000
00 25 08.74 +48 02 51.0
Date first
1991
Date last
2013
Obs
17
Pa first
242
Pa last
273
P.A. Now (θ)
258.3°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.32"
Mag pri
7.72
Mag sec
10.63
delta mag (ΔM)
2.91
Spectral class
F8 (yellow-white)
Pri motion ra
+274
Sec motion ra
Pri motion dec
+011
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
00251+4803 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 36347 00251+4803 HDS 56 AB 1991 2013 17 258 0.3 7.72 10.63 2.91 Y <===
Show 36347 00251+4803 CRZ 2 AC 1998 2015 2 193 121.2 7.53 14.70 7.17
Show 36347 00251+4803 SOZ 4 AB,D 2015 2015 1 259 13.8 6.38 12.50 6.12
Show 00251+4803 RED 14 Ca,Cb 2005 2005 1 233 0.3 16.23 16.40 0.17
Quintuple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Cassiopeia
SAO
36347
HIP
1987
Tycho2
3252-00597-1
HD
2057
BD
BD+47 88
Distance
43.82
Distance ly
142.94
last precise pa
272.7
last precise sep
0.325
 
 
ORBITAL ELEMENTS
 
 
Period (P)28.05y± 0.46 Periastron (T)1999.29y± 0.55 Semi-major axis (a)0.23a± 0.008
Eccentricity (e)0.481± 0.058 Inclination (i)164°± 3.8 Longitude of periastron (ω)358.9°± 15.7
Node (Ω)96.1°± 16.2 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2007
label rho theta
2000 0.123 69.3
2001 0.140 35.7
2002 0.165 10.9
2003 0.192 352.9
2004 0.219 339.3
2005 0.244 328.6
2006 0.266 319.8
2007 0.285 312.3
2008 0.301 305.6
2009 0.315 299.6
2010 0.325 294.0
2011 0.333 288.7
2012 0.338 283.7
2013 0.340 278.7
2014 0.340 273.8
2015 0.337 268.8
2016 0.331 263.7
2017 0.322 258.3
2018 0.310 252.6
2019 0.296 246.4
2020 0.279 239.4
2021 0.258 231.5
2022 0.235 222.1
2023 0.210 210.5
2024 0.182 195.6
2025 0.155 175.3
2026 0.133 147.3
2027 0.120 110.7
2028 0.123 71.2
2029 0.139 37.2
2030 0.164 12.0

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic