17194-4413 HDO 269 (HD 156398)

 
 
17h 19m 24.63s -44° 13' 22.8" P.A. 233.00 sep 0.1 mag 7.30,7.50 Sp B9.5III dist. 325.73 pc (1062.53 l.y.)
 
 
Coord 2000 17194-4413 Discov num HDO 269 Comp Coord arcsec 2000 17 19 24.63 -44 13 22.8
Date first 1897 Date last 2017 Obs 29
Pa first 350 Pa last 233.2 P.A. Now (θ) 233.2°
Sep first 0.6 Sep last 0.104 Sep. Now (ρ) 0.104"
Mag pri 7.30 Mag sec 7.50 delta mag (ΔM) 0.2 Spectral class B9.5III (blue-white)
Pri motion ra +007 Sec motion ra
Pri motion dec -016 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 156398 Constellation Scorpius SAO 227821 HIP 84748
Tycho2 7882-00057-1 Gaia DR2 5953285848666591232 HD 156398 HR 6427
GC 23367 CD CD-4411595 CP CP-44 8358 Distance 325.73
Distance ly 1062.53
 
 
ORBITAL ELEMENTS
 
 
Period (P)1700y Periastron (T)1999.5y Semi-major axis (a)0.806a
Eccentricity (e)0.949 Inclination (i)72.4° Longitude of periastron (ω)112.7°
Node (Ω)27.7° Notesn ReferenceTok2018b
Equinox2000 Last observation2017 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 184.7 0.026
2001 197.3 0.039
2002 203.8 0.051
2003 208.1 0.060
2004 211.4 0.067
2005 214.1 0.073
2006 216.4 0.078
2007 218.5 0.082
2008 220.4 0.085
2009 222.1 0.088
2010 223.7 0.091
2011 225.3 0.094
2012 226.7 0.096
2013 228.1 0.098
2014 229.5 0.100
2015 230.8 0.101
2016 232.0 0.103
2017 233.3 0.104
2018 234.4 0.105
2019 235.6 0.107
2020 236.7 0.108
2021 237.9 0.109
2022 239.0 0.110
2023 240.0 0.111
2024 241.1 0.112
2025 242.1 0.113
2026 243.1 0.114
2027 244.1 0.115
2028 245.1 0.116
2029 246.1 0.117
2030 247.1 0.117


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


 
  


wds17194-4413a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 17194-4413 HDO 269 (HD 156398) : NOTES
 
 
discov_num notes refcode
HDO 269 Spectrum composite; B9.5V+A6III.
 
 
REFERENCES
 
 
refcode metd author reference
Tok2018b orb j Tokovinin, A. 2018IAUDS.194....1T
Tok2018b Inf. Circ. 194, 1, 2018
 
 
DISCOVERER
 
 
idgroup discov author
1 HDO Harvard Obs.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17194-4413 HDO 269 1992 22 34 0.1 7.30 7.50 N 171924.63-441322.8
17194-4413 HDO 269 2009 25 222 0.1 7.30 7.50 N 171924.63-441322.8
17194-4413 HDO 269 2014 26 50 0.1 7.30 7.50 B9.5III N 171924.63-441322.8
17194-4413 HDO 269 2017 29 233 0.1 7.30 7.50 B9.5III NO 171924.63-441322.8

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WDS 17194-4413 HDO 269 (HD 156398) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 17194-4413 HDO 269 (HD 156398) : MEASURES
 
 
No records found.

 
 
WDS 17194-4413 (HD 156398) : VIRTUAL EYEPIECE
 
 

virtual eyepiece
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Components only
 
 
WDS 17194-4413 (HD 156398) : ALADIN DSS IMAGE @
 
 
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.