19055+3352 HU 940

 
 
19h 05m 30.86s +33° 52' 21.5" P.A. 187.00 sep 0.4 mag 9.18,9.78 Sp F8 dist. 93.63 pc (305.42 l.y.)
 
 
Coord 2000 19055+3352 Discov num HU  940 Comp Coord arcsec 2000 19 05 30.86 +33 52 21.5
Date first 1898 Date last 2016 Obs 84
Pa first 191 Pa last 186.9 P.A. Now (θ) 185.1°
Sep first 0.5 Sep last 0.44 Sep. Now (ρ) 0.41"
Mag pri 9.18 Mag sec 9.78 delta mag (ΔM) 0.6 Spectral class F8 (yellow-white)
Pri motion ra +017 Sec motion ra +017
Pri motion dec -031 Sec motion dec -031
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Lyra HIP 93754 Tycho2 2648-01984-1 ADS 12033
BD BD+33 3318 Distance 93.63 Distance ly 305.42
 
 
ORBITAL ELEMENTS
 
 
Period (P)111.6y± 8 Periastron (T)1939.8y± 1 Semi-major axis (a)0.316a± 0.016
Eccentricity (e)0.784± 0.05 Inclination (i)129.2°± 5 Longitude of periastron (ω)18.5°± 6
Node (Ω)31.4°± 1.5 Notesn ReferenceDoc2009g
Equinox2000 Last observation1996 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 197.6 0.539
2001 197.1 0.536
2002 196.7 0.533
2003 196.2 0.530
2004 195.8 0.527
2005 195.3 0.523
2006 194.9 0.520
2007 194.4 0.515
2008 193.9 0.511
2009 193.4 0.506
2010 192.9 0.501
2011 192.4 0.496
2012 191.9 0.491
2013 191.4 0.485
2014 190.8 0.479
2015 190.3 0.472
2016 189.7 0.465
2017 189.1 0.458
2018 188.5 0.451
2019 187.9 0.443
2020 187.2 0.435
2021 186.5 0.427
2022 185.8 0.419
2023 185.1 0.410
2024 184.3 0.400
2025 183.5 0.391
2026 182.7 0.381
2027 181.8 0.371
2028 180.8 0.360
2029 179.8 0.349
2030 178.7 0.337


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


 
  


wds19055%2B3352c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic