19394+3009 MCA  57 (Phi Cyg)

 
 
19h 39m 22.60s +30 09' 11.6" P.A. 247 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
247
P.A. Now (θ)
247°
Sep first
0.0
Sep last
0.0
Sep. Now (ρ)
0"
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
 
 
Precise pa
246.8
Precise sep
0.03
Name
Phi Cyg
Constellation
Cygnus
SAO
68637
HIP
96683
HD
185734
HR
7478
GC
27203
Bayer
Phi Cygni
Bayer name
Phi Cyg
Flamsteed
12 Cygni
Flamsteed name
12 Cyg
Distance
81.63
Distance ly
266.28
last precise pa
246.8
last precise sep
0.03
 
 
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 Note Grade1(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000-01-01 0.018 87.2
2001-01-01 0.032 78.4
2002-01-01 0.038 74.0
2003-01-01 0.031 69.6
2004-01-01 0.005 43.4
2005-01-01 0.010 234.4
2006-01-01 0.013 94.2
2007-01-01 0.029 80.1
2008-01-01 0.037 75.2
2009-01-01 0.035 71.1
2010-01-01 0.016 62.4
2011-01-01 0.013 246.3
2012-01-01 0.007 111.8
2013-01-01 0.025 82.4
2014-01-01 0.036 76.4
2015-01-01 0.037 72.4
2016-01-01 0.024 66.7
2017-01-01 0.011 256.6
2018-01-01 0.004 174.4
2019-01-01 0.020 85.7
2020-01-01 0.033 77.8
2021-01-01 0.038 73.6
2022-01-01 0.030 69.0
2023-01-01 0.002 354.1
2024-01-01 0.008 227.2
2025-01-01 0.015 91.2
2026-01-01 0.030 79.5
2027-01-01 0.038 74.8
2028-01-01 0.034 70.6
2029-01-01 0.012 59.4
2030-01-01 0.013 242.9

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

grafico orbita





wds19394%2B3009a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19394+3009 MCA 57 1994 52 67 0.0 4.70   G8III-IV NO 193922.60+300911.6

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