17240+3835 HU 1179 (HD 157853)

 
 
17h 24m 02.26s +38° 34' 57.7" P.A. 272.00 sep 0.3 mag 7.13,7.79 Sp F9III dist. 175.44 pc (572.29 l.y.)
 
 
Coord 2000 17240+3835 Discov num HU 1179 Comp Coord arcsec 2000 17 24 02.26 +38 34 57.7
Date first 1905 Date last 2016 Obs 93
Pa first 273 Pa last 271.7 P.A. Now (θ) 267.1°
Sep first 0.2 Sep last 0.293 Sep. Now (ρ) 0.255"
Mag pri 7.13 Mag sec 7.79 delta mag (ΔM) 0.66 Spectral class F9III (yellow-white)
Pri motion ra -007 Sec motion ra
Pri motion dec +034 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 157853 Constellation Hercules SAO 66006 HIP 85149
Tycho2 3086-02092-1 HD 157853 HR 6488 GC 23560
ADS 10531 BD BD+38 2928 Distance 175.44 Distance ly 572.29
 
 
ORBITAL ELEMENTS
 
 
Period (P)91.7y Periastron (T)1980.41y Semi-major axis (a)0.181a
Eccentricity (e)0.692 Inclination (i)104.4° Longitude of periastron (ω)37.9°
Node (Ω)96.9° Notesn ReferenceHrt2000b
Equinox Last observation1997 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 275.3 0.229
2001 274.8 0.234
2002 274.4 0.239
2003 274.0 0.243
2004 273.6 0.247
2005 273.3 0.250
2006 272.9 0.253
2007 272.5 0.256
2008 272.2 0.258
2009 271.9 0.260
2010 271.5 0.262
2011 271.2 0.263
2012 270.8 0.264
2013 270.5 0.264
2014 270.2 0.264
2015 269.9 0.264
2016 269.5 0.264
2017 269.2 0.264
2018 268.9 0.263
2019 268.5 0.262
2020 268.2 0.260
2021 267.8 0.259
2022 267.5 0.257
2023 267.1 0.255
2024 266.8 0.252
2025 266.4 0.250
2026 266.0 0.247
2027 265.7 0.244
2028 265.3 0.241
2029 264.9 0.237
2030 264.4 0.233


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



 
 


wds17240%2B3835a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic