20216+2346 STF 2672 (HD 193817)

 
 
20h 21m 36.19s +23° 45' 50.6" P.A. 350.00 sep 0.6 mag 9.34,9.60 Sp F8
 
 
Coord 2000 20216+2346 Discov num STF2672 Comp Coord arcsec 2000 20 21 36.19 +23 45 50.6
Date first 1831 Date last 2016 Obs 97
Pa first 278 Pa last 350.1 P.A. Now (θ) 350.1°
Sep first 1.1 Sep last 0.648 Sep. Now (ρ) 0.648"
Mag pri 9.34 Mag sec 9.60 delta mag (ΔM) 0.26 Spectral class F8 (yellow-white)
Pri motion ra +011 Sec motion ra +011
Pri motion dec +006 Sec motion dec +006
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 193817 Constellation Vulpecula SAO 88567 Tycho2 2155-00709-1
Gaia DR2 1831879040092466944 HD 193817 GC 28316 ADS 13750
 
 
ORBITAL ELEMENTS
 
 
Period (P)764y Periastron (T)2121.6y Semi-major axis (a)0.898a
Eccentricity (e)0.436 Inclination (i)41.4° Longitude of periastron (ω)41°
Node (Ω)40.6° Notes ReferenceLin2019c
Equinox2000 Last observation2016 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 339.6 0.668
2001 340.1 0.667
2002 340.7 0.666
2003 341.3 0.664
2004 341.9 0.663
2005 342.5 0.662
2006 343.0 0.660
2007 343.6 0.659
2008 344.2 0.658
2009 344.8 0.657
2010 345.4 0.656
2011 346.0 0.654
2012 346.6 0.653
2013 347.2 0.652
2014 347.8 0.651
2015 348.4 0.650
2016 349.0 0.649
2017 349.6 0.648
2018 350.3 0.646
2019 350.9 0.645
2020 351.5 0.644
2021 352.1 0.643
2022 352.7 0.642
2023 353.4 0.641
2024 354.0 0.640
2025 354.6 0.639
2026 355.2 0.638
2027 355.9 0.637
2028 356.5 0.636
2029 357.1 0.635
2030 357.8 0.634


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


 
  


wds20216%2B2346a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20216+2346 STF 2672 (HD 193817) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Lin2019c orb - Ling, J.F., Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., Aristidi, E., 2019IAUDS.198....1C
Lin2019c Zanutta, A., Abe, Bendjoya, Rivet, Suarez, & Vernet
Lin2019c Inf. Circ. 198, 3, 2019
 
 
DISCOVERER
 
 
idgroup discov author
1 STF Struve, F.G.W.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20216+2346 STF2672 2005 87 344 0.6 9.34 9.60 F8 202136.19+234550.6
20216+2346 STF2672 2006 90 343 0.7 9.34 9.60 F8 202136.19+234550.6
20216+2346 STF2672 2010 92 346 0.6 9.34 9.60 F8 202136.19+234550.6
20216+2346 STF2672 2016 96 350 0.7 9.34 9.60 F8 202136.19+234550.6

If you need more information about this double, apply for a data request form to the WDS.

 
 
WDS 20216+2346 STF 2672 (HD 193817) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20216+2346 STF 2672 (HD 193817) : MEASURES
 
 
No records found.

 
 
WDS 20216+2346 (HD 193817) : VIRTUAL EYEPIECE
 
 

virtual eyepiece
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Radius:
Components only
 
 
WDS 20216+2346 (HD 193817) : ALADIN DSS IMAGE @
 
 
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.