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 |
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Comp |
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Coord arcsec 2000 |
19 39 22.60 +30 09 11.6 |
|
| Date first |
1978 |
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Date last |
1994 |
|
Obs |
52 |
|
| Pa first |
81 |
|
Pa last |
246.8 |
|
P.A. Now (θ) |
246.8° |
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| Sep first |
0.0 |
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Sep last |
0.03 |
|
Sep. Now (ρ) |
0.03" |
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| Mag pri |
4.90 |
|
Mag sec |
5.10 |
|
delta mag (ΔM) |
0.2 |
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Spectral class |
G8III-IV (yellow) |
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| Pri motion ra |
+004 |
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Sec motion ra |
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| Pri motion dec |
+037 |
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Sec motion dec |
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| Notes |
N
O
R
(See Notes, Orbital solution, Red magnitudes) |
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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 |
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BD |
BD+29 3684 |
|
Bayer |
Phi Cygni |
|
Bayer name |
Phi Cyg |
|
| Flamsteed |
12 Cygni |
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Flamsteed name |
12 Cyg |
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FK5 |
3570 |
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Distance |
81.63 |
|
| Distance ly |
266.28 |
|
Bayer greek |
φ Cyg |
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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 |
Notes | n | |
Reference | Pbx2000b | |
| Equinox | | |
Last observation | | |
Grade | 1 | (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 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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