17221+2310 COU 415

 
 
17H 22M 04.55S +23 09' 40.4" P.A. 222.6 SEP 0.27 MAG 8.75,9.83 SP F5 DIST. 84.75 PC (276.45 L.Y.)
 
 
Coord 2000
17221+2310
Discov num
COU 415
Comp
Coord arcsec 2000
17 22 04.55 +23 09 40.4
Date first
1969
Date last
2010
Obs
47
Pa first
124
Pa last
248
P.A. Now (θ)
222.6°
Sep first
0.3
Sep last
0.2
Sep. Now (ρ)
0.27"
Mag pri
8.75
Mag sec
9.83
delta mag (ΔM)
1.08
Spectral class
F5 (yellow-white)
Pri motion ra
-013
Sec motion ra
Pri motion dec
+066
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hercules
SAO
85038
HIP
84976
Tycho2
2074-01335-1
HD
157392
BD
BD+23 3092
Distance
84.75
Distance ly
276.45
last precise pa
247.6
last precise sep
0.22
 
 
ORBITAL ELEMENTS
 
 
Period (P)94.449y Periastron (T)1989.72y Semi-major axis (a)0.308a
Eccentricity (e)0.383 Inclination (i)135.2° Longitude of periastron (ω)125.5°
Node (Ω)129.3° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.234 291.3
2001 0.237 287.1
2002 0.240 282.9
2003 0.241 278.8
2004 0.243 274.8
2005 0.244 270.8
2006 0.245 266.8
2007 0.246 262.9
2008 0.247 259.0
2009 0.248 255.1
2010 0.250 251.3
2011 0.251 247.5
2012 0.253 243.8
2013 0.254 240.1
2014 0.257 236.5
2015 0.259 232.9
2016 0.262 229.4
2017 0.264 226.0
2018 0.268 222.6
2019 0.271 219.4
2020 0.275 216.2
2021 0.278 213.1
2022 0.282 210.1
2023 0.287 207.1
2024 0.291 204.3
2025 0.295 201.5
2026 0.300 198.9
2027 0.304 196.3
2028 0.309 193.7
2029 0.314 191.3
2030 0.318 188.9

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