17419+7209 STF 2241 AB (Dziban)

 
 
17h 41m 56.36s +72 08' 55.8" P.A. 14.00 sep 29.6 mag 4.60,5.59 Sp F5IV+F8V dist. 22.84 pc (74.5 l.y.)
 
 
Coord 2000 17419+7209 Discov num STF2241 Comp AB Coord arcsec 2000 17 41 56.36 +72 08 55.8
Date first 1800 Date last 2019 Obs 183
Pa first 14 Pa last 14 P.A. Now (θ) 14°
Sep first 32.0 Sep last 29.6 Sep. Now (ρ) 29.6"
Mag pri 4.60 Mag sec 5.59 delta mag (ΔM) 0.99 Spectral class F5IV+F8V (yellow-white/yellow-white)
Pri motion ra +027 Sec motion ra +029
Pri motion dec -270 Sec motion dec -277
Notes N O Z (See Notes, Orbital solution, Parallax indicates components are physical)
rPM=0.026 (< 0.3, Physical double)
This double is physical.
 
 
17419+7209 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Dziban 8890 17 41 56 +72 08 56 STF 2241 AB 2019 183 14 29.6 4.60 5.59 0.99 Y <===
Show 8890 17 41 56 +72 08 56 STF 2241 AC 2004 14 107 78.1 4.60 11.05 6.45
Show 8890 17 41 56 +72 08 56 STF 2241 AD 2004 3 66 105.9 4.60 12.98 8.38
Show 8890 17 41 56 +72 08 56 PIN 11 AE 1999 1 144 69.0 3.50 14.18 10.68
Show 17 42 13 +72 08 32 STF 2241 CD 2015 8 19 69.4 11.05 12.98 1.93
Quintuple system
5 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Dziban Constellation Draco SAO 8890 HIP 86614
Tycho2 4436-01425-1 Gaia DR2 1651268660202647296 HD 162003 HR 6636
GC 24089 ADS 10759 GL Gl 694.1A DM BD+72 805
BD BD+72 804 Bayer Psi Draconis Bayer name Psi Dra Flamsteed 31 Draconis
Flamsteed name 31 Dra FK5 670 Distance 22.84 Distance ly 74.5
Bayer greek ψ Dra
Other names DSIBAN
Meaning the two jackals
 
 
ORBITAL ELEMENTS
 
 
Period (P)100c± 33 Periastron (T)3817y± 500 Semi-major axis (a)31a± 7
Eccentricity (e)0.28± 0.07 Inclination (i)55°± 4 Longitude of periastron (ω)99°± 36
Node (Ω)16°± 1 Notesn ReferenceKis2009
Equinox Last observation2001 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 16.7 29.677
2001 16.8 29.671
2002 16.8 29.665
2003 16.8 29.659
2004 16.8 29.653
2005 16.9 29.647
2006 16.9 29.642
2007 16.9 29.636
2008 16.9 29.630
2009 16.9 29.624
2010 17.0 29.618
2011 17.0 29.611
2012 17.0 29.605
2013 17.0 29.599
2014 17.1 29.593
2015 17.1 29.587
2016 17.1 29.581
2017 17.1 29.575
2018 17.1 29.569
2019 17.2 29.563
2020 17.2 29.557
2021 17.2 29.551
2022 17.2 29.545
2023 17.2 29.538
2024 17.3 29.532
2025 17.3 29.526
2026 17.3 29.520
2027 17.3 29.514
2028 17.4 29.508
2029 17.4 29.501
2030 17.4 29.495


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



 
 


wds17419%2B7209a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic