21041+0300 DSG   6Aa,Ab

 
 
21H 04M 07.38S +02 59' 40.1" P.A. 155 MAG 7.60,9.10 SP F9V+G9V DIST. 51.89 PC (169.27 L.Y.)
 
 
Coord 2000
21041+0300
Discov num
DSG   6
Comp
Aa,Ab
Coord arcsec 2000
21 04 07.38 +02 59 40.1
Date first
2012
Date last
2015
Obs
8
Pa first
225
Pa last
155
P.A. Now (θ)
155°
Sep first
0.0
Sep last
0.0
Sep. Now (ρ)
0"
Mag pri
7.60
Mag sec
9.10
delta mag (ΔM)
1.5
Spectral class
F9V+G9V (yellow-white/yellow)
Pri motion ra
-274
Sec motion ra
Pri motion dec
-372
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
21041+0300 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 21041+0300 DSG 6 Aa,Ab 2012 2015 8 155 0.0 7.60 9.10 1.50 Y <===
Show 21041+0300 WSI 6 AB 1999 2016 20 292 0.3 7.50 9.50 2.00 Y
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Equuleus
HIP
103987
Tycho2
0530-00708-1
HD
200580
BD
BD+02 4295
Distance
51.89
Distance ly
169.27
last precise pa
155.3
last precise sep
0.009
 
 
ORBITAL ELEMENTS
 
 
Period (P)1.03483y± 0.00008 Periastron (T)2014.6223y± 0.0089 Semi-major axis (a)0.0284a
Eccentricity (e)0.0934± 0.004 Inclination (i)68.6°± 13.7 Longitude of periastron (ω)124.9°± 3.1
Node (Ω)97.3°± 12.5 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2015
label rho theta
2000 0.013 141.7
2001 0.017 125.9
2002 0.021 116.3
2003 0.025 109.7
2004 0.028 104.5
2005 0.029 100.1
2006 0.030 96.1
2007 0.029 92.0
2008 0.028 87.8
2009 0.026 83.0
2010 0.023 77.2
2011 0.020 69.6
2012 0.017 58.9
2013 0.013 42.7
2014 0.011 18.7
2015 0.011 350.5
2016 0.014 327.3
2017 0.017 311.6
2018 0.020 301.1
2019 0.023 293.5
2020 0.025 287.5
2021 0.027 282.2
2022 0.027 277.3
2023 0.026 272.1
2024 0.023 266.2
2025 0.020 258.7
2026 0.016 247.6
2027 0.012 228.9
2028 0.010 196.9
2029 0.011 160.1
2030 0.014 136.2

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