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 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 4 | (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 |
| 2031 |
210.4 |
2.870 |
| 2032 |
210.0 |
2.879 |
| 2033 |
209.6 |
2.888 |
| 2034 |
209.3 |
2.897 |
| 2035 |
208.9 |
2.906 |
| 2036 |
208.5 |
2.915 |
| 2037 |
208.1 |
2.924 |
| 2038 |
207.7 |
2.933 |
| 2039 |
207.4 |
2.942 |
| 2040 |
207.0 |
2.951 |
| 2041 |
206.6 |
2.960 |
| 2042 |
206.3 |
2.969 |
| 2043 |
205.9 |
2.977 |
| 2044 |
205.5 |
2.986 |
| 2045 |
205.2 |
2.995 |
| 2046 |
204.8 |
3.003 |
| 2047 |
204.5 |
3.012 |
| 2048 |
204.1 |
3.021 |
| 2049 |
203.8 |
3.029 |
| 2050 |
203.4 |
3.038 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
