17221+2310 COU 415 (HD 157392)

 
 
17h 22m 04.55s +23° 09' 40.4" P.A. 236.00 sep 0.2 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 2013 Obs 58
Pa first 124 Pa last 236.1 P.A. Now (θ) 207.1°
Sep first 0.3 Sep last 0.232 Sep. Now (ρ) 0.287"
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
 
 
Name HD 157392 Constellation Hercules SAO 85038 HIP 84976
Tycho2 2074-01335-1 Gaia DR2 4569257307824602112 HD 157392 BD BD+23 3092
Distance 84.75 Distance ly 276.45
 
 
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° Notesn ReferenceMsn2011c
Equinox2000 Last observation2009 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 291.3 0.234
2001 287.1 0.237
2002 282.9 0.240
2003 278.8 0.241
2004 274.8 0.243
2005 270.8 0.244
2006 266.8 0.245
2007 262.9 0.246
2008 259.0 0.247
2009 255.1 0.248
2010 251.3 0.250
2011 247.5 0.251
2012 243.8 0.253
2013 240.1 0.254
2014 236.5 0.257
2015 232.9 0.259
2016 229.4 0.262
2017 226.0 0.264
2018 222.6 0.268
2019 219.4 0.271
2020 216.2 0.275
2021 213.1 0.278
2022 210.1 0.282
2023 207.1 0.287
2024 204.3 0.291
2025 201.5 0.295
2026 198.9 0.300
2027 196.3 0.304
2028 193.7 0.309
2029 191.3 0.314
2030 188.9 0.318


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



 
 


wds17221%2B2310c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic