00492+5720 A 921 AB

 
 
00h 49m 09.10s +57 19' 37.6" P.A. 2.00 sep 0.2 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 2.1 P.A. Now (θ) 33.2°
Sep first 0.2 Sep last 0.239 Sep. Now (ρ) 0.181"
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 wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 21736 00 49 09 +57 19 38 A 921 AB 2008 15 2 0.2 9.00 9.50 0.50 Y <===
Show 21736 00 49 09 +57 19 38 A 921 AB,C 2011 10 268 4.7 8.60 14.00 5.40
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cassiopeia SAO 21736 Tycho2 3663-02675-1 Gaia DR2 423900666397110016
HD 236538 ADS 674
 
 
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° Notesn ReferenceCve2012
Equinox2000 Last observation2007 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 353.6 0.166
2001 355.5 0.168
2002 357.4 0.169
2003 359.3 0.170
2004 1.1 0.171
2005 2.9 0.172
2006 4.6 0.173
2007 6.4 0.174
2008 8.1 0.175
2009 9.9 0.175
2010 11.6 0.176
2011 13.3 0.176
2012 15.0 0.177
2013 16.7 0.177
2014 18.4 0.178
2015 20.1 0.178
2016 21.7 0.178
2017 23.4 0.179
2018 25.0 0.179
2019 26.7 0.180
2020 28.3 0.180
2021 30.0 0.180
2022 31.6 0.181
2023 33.2 0.181
2024 34.8 0.182
2025 36.4 0.182
2026 38.0 0.182
2027 39.6 0.183
2028 41.2 0.183
2029 42.8 0.184
2030 44.3 0.184


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



 
 


wds00492%2B5720a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic