00492+5720 A   921AB

 
 
00H 49M 09.10S +57 19' 37.6" P.A. 23.4 SEP 0.18 MAG 9.00,9.50 SP G5
 
 
Coord 2000
00492+5720
Discov num
A   921
Comp
AB
Coord arcsec 2000
00 49 09.10 +57 19 37.6
Date first
1905
Date last
2008
Obs
15
Pa first
39
Pa last
2
P.A. Now (θ)
23.4°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.18"
Mag pri
9.00
Mag sec
9.50
delta mag (ΔM)
0.5
Spectral class
G5 (yellow)
Pri motion ra
+016
Sec motion ra
Pri motion dec
+020
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
00492+5720 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 21736 00492+5720 A 921 AB 1905 2008 15 23 0.2 9.00 9.50 0.50 Y <===
Show 21736 00492+5720 A 921 AB,C 1905 2000 10 268 4.1 8.60 14.00 5.40
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Cassiopeia
SAO
21736
Tycho2
3663-02675-1
HD
236538
ADS
674
last precise pa
2.1
last precise sep
0.239
 
 
ORBITAL ELEMENTS
 
 
Period (P)120.47y Periastron (T)1982.4y Semi-major axis (a)0.221a
Eccentricity (e)0.696 Inclination (i)59.6° Longitude of periastron (ω)96.6°
Node (Ω)140.3° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2007
label rho theta
2000 0.166 353.6
2001 0.168 355.5
2002 0.169 357.4
2003 0.170 359.3
2004 0.171 1.1
2005 0.172 2.9
2006 0.173 4.6
2007 0.174 6.4
2008 0.175 8.1
2009 0.175 9.9
2010 0.176 11.6
2011 0.176 13.3
2012 0.177 15.0
2013 0.177 16.7
2014 0.178 18.4
2015 0.178 20.1
2016 0.178 21.7
2017 0.179 23.4
2018 0.179 25.0
2019 0.180 26.7
2020 0.180 28.3
2021 0.180 30.0
2022 0.181 31.6
2023 0.181 33.2
2024 0.182 34.8
2025 0.182 36.4
2026 0.182 38.0
2027 0.183 39.6
2028 0.183 41.2
2029 0.184 42.8
2030 0.184 44.3

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