19394+3009 MCA 57 (Phi Cyg)

 
 
19h 39m 22.60s +30 09' 11.6" P.A. 247.00 sep 0.0 mag 4.90,5.10 Sp G8III-IV dist. 81.63 pc (266.28 l.y.)
 
 
Coord 2000 19394+3009 Discov num MCA  57 Comp Coord arcsec 2000 19 39 22.60 +30 09 11.6
Date first 1978 Date last 1994 Obs 52
Pa first 81 Pa last 246.8 P.A. Now (θ) 246.8°
Sep first 0.0 Sep last 0.03 Sep. Now (ρ) 0.03"
Mag pri 4.90 Mag sec 5.10 delta mag (ΔM) 0.2 Spectral class G8III-IV (yellow)
Pri motion ra +004 Sec motion ra
Pri motion dec +037 Sec motion dec
Notes N O R (See Notes, Orbital solution, Red magnitudes)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Phi Cyg Constellation Cygnus SAO 68637 HIP 96683
Tycho2 2656-05248-1 Gaia DR2 2032457178261396736 HD 185734 HR 7478
GC 27203 BD BD+29 3684 Bayer Phi Cygni Bayer name Phi Cyg
Flamsteed 12 Cygni Flamsteed name 12 Cyg FK5 3570 Distance 81.63
Distance ly 266.28 Bayer greek φ Cyg
 
 
ORBITAL ELEMENTS
 
 
Period (P)434.171d± 0.015 Periastron (T)28230.76d (1936.169y)± 0.62 Semi-major axis (a)26.9m± 0.75
Eccentricity (e)0.542± 0.0063 Inclination (i)80.8°± 0.63 Longitude of periastron (ω)34°± 1.3
Node (Ω)251°± 0.86 Notesn ReferencePbx2000b
Equinox Last observation Grade1(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 87.2 0.018
2001-01-01 78.4 0.032
2002-01-01 74.0 0.038
2003-01-01 69.6 0.031
2004-01-01 43.4 0.005
2005-01-01 234.4 0.010
2006-01-01 94.2 0.013
2007-01-01 80.1 0.029
2008-01-01 75.2 0.037
2009-01-01 71.1 0.035
2010-01-01 62.4 0.016
2011-01-01 246.3 0.013
2012-01-01 111.8 0.007
2013-01-01 82.4 0.025
2014-01-01 76.4 0.036
2015-01-01 72.4 0.037
2016-01-01 66.7 0.024
2017-01-01 256.6 0.011
2018-01-01 174.4 0.004
2019-01-01 85.7 0.020
2020-01-01 77.8 0.033
2021-01-01 73.6 0.038
2022-01-01 69.0 0.030
2023-01-01 354.1 0.002
2024-01-01 227.2 0.008
2025-01-01 91.2 0.015
2026-01-01 79.5 0.030
2027-01-01 74.8 0.038
2028-01-01 70.6 0.034
2029-01-01 59.4 0.012
2030-01-01 242.9 0.013


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



 
 


wds19394%2B3009a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic