19450+4508 STF 2579 AB (Fawaris)

 
 
19h 44m 58.44s +45 07' 50.5" P.A. 213.00 sep 2.7 mag 2.89,6.27 Sp B9.5IV dist. 50.58 pc (164.99 l.y.)
 
 
Coord 2000 19450+4508 Discov num STF2579 Comp AB Coord arcsec 2000 19 44 58.44 +45 07 50.5
Date first 1826 Date last 2020 Obs 488
Pa first 41 Pa last 212.6 P.A. Now (θ) 212.6°
Sep first 1.9 Sep last 2.74 Sep. Now (ρ) 2.74"
Mag pri 2.89 Mag sec 6.27 delta mag (ΔM) 3.38 Spectral class B9.5IV (blue-white)
Pri motion ra +051 Sec motion ra
Pri motion dec +050 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
19450+4508 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Fawaris 48796 19 44 58 +45 07 50 STF 2579 AB 2020 488 213 2.7 2.89 6.27 3.38 Y <===
Show 48796 19 44 58 +45 07 50 STF 2579 AC 2017 8 67 62.5 2.89 12.00 9.11
Show 48796 19 44 58 +45 07 50 DAL 37 AD 2007 3 246 42.0 2.89 14.80 11.91
Show 48796 19 44 58 +45 07 50 DAL 37 AF 2007 3 66 147.5 2.89 12.80 9.91
Show 19 44 55 +45 07 35 DAL 37 DE 2015 4 251 3.5 14.80 15.20 0.40
Show 19 45 11 +45 08 51 DAL 37 FG 2016 3 312 3.1 13.00 13.80 0.80
Septuple system
7 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Fawaris Var name 12380/1 Constellation Cygnus SAO 48796
HIP 97165 Tycho2 3557-02486-1 Gaia DR2 2079784487999414656 HD 186882
HR 7528 GC 27347 ADS 12880 BD BD+44 3234
Bayer Delta Cygni Bayer name Del Cyg Flamsteed 18 Cygni Flamsteed name 18 Cyg
Distance 50.58 Distance ly 164.99 Bayer greek δ Cyg
 
 
ORBITAL ELEMENTS
 
 
Period (P)657.1722y± 204.03 Periastron (T)1866.357y± 15.4645 Semi-major axis (a)2.68872a± 0.43688
Eccentricity (e)0.43962± 0.07552 Inclination (i)154.254°± 6.254 Longitude of periastron (ω)151.114°± 9.365
Node (Ω)138.595°± 31.21 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 223.8 2.574
2001 223.4 2.584
2002 222.9 2.594
2003 222.4 2.604
2004 221.9 2.614
2005 221.5 2.623
2006 221.0 2.633
2007 220.5 2.643
2008 220.1 2.652
2009 219.6 2.662
2010 219.2 2.672
2011 218.7 2.682
2012 218.3 2.691
2013 217.8 2.701
2014 217.4 2.710
2015 217.0 2.720
2016 216.5 2.730
2017 216.1 2.739
2018 215.7 2.749
2019 215.3 2.758
2020 214.8 2.767
2021 214.4 2.777
2022 214.0 2.786
2023 213.6 2.796
2024 213.2 2.805
2025 212.8 2.814
2026 212.4 2.824
2027 212.0 2.833
2028 211.6 2.842
2029 211.2 2.851
2030 210.8 2.861


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



 
 


wds19450%2B4508c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic