21441+2845 STF 2822 AB (Mu1 Cyg)
21h 44m 08.57s +28° 44' 33.4" P.A. 325.00 sep 1.6 mag 4.75,6.18 Sp F6V+G2V dist. 22.24 pc (72.55 l.y.)
| Coord 2000 |
21441+2845 |
|
Discov num |
STF2822 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 44 08.57 +28 44 33.4 |
|
| Date first |
1777 |
|
Date last |
2020 |
|
Obs |
735 |
|
| Pa first |
108 |
|
Pa last |
324.9 |
|
P.A. Now (θ) |
325.5° |
|
| Sep first |
11.0 |
|
Sep last |
1.59 |
|
Sep. Now (ρ) |
1.472" |
|
| Mag pri |
4.75 |
|
Mag sec |
6.18 |
|
delta mag (ΔM) |
1.43 |
|
Spectral class |
F6V+G2V (yellow-white/yellow) |
|
| Pri motion ra |
+260 |
|
Sec motion ra |
+260 |
|
| Pri motion dec |
-243 |
|
Sec motion dec |
-243 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
21441+2845 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
Mu1 Cyg |
89940 |
21 44 09 +28 44 33 |
STF 2822 AB |
2020 |
735 |
325 |
1.6 |
4.75 |
6.18 |
1.43 |
Y |
<=== |
| Show |
|
89940 |
21 44 09 +28 44 33 |
STF 2822 AC |
2012 |
16 |
292 |
76.6 |
4.75 |
12.93 |
8.18 |
|
|
| Show |
|
89940 |
21 44 09 +28 44 33 |
STF 2822 AD |
2019 |
56 |
43 |
197.0 |
4.75 |
6.94 |
2.19 |
|
|
| Show |
|
89940 |
21 44 09 +28 44 33 |
FYM 25 AF |
2012 |
3 |
72 |
111.5 |
4.75 |
12.64 |
7.89 |
|
|
| Show |
|
89940 |
21 44 09 +28 44 33 |
FYM 25 AG |
2012 |
3 |
73 |
168.1 |
4.75 |
13.77 |
9.02 |
|
|
| Show |
|
89944 |
21 44 08 +28 44 35 |
STF 2822 BD |
2012 |
24 |
45 |
196.7 |
6.18 |
6.94 |
0.76 |
|
|
| Show |
|
89944 |
21 44 19 +28 46 54 |
ES 521 DE |
2015 |
7 |
286 |
17.5 |
6.94 |
13.13 |
6.19 |
|
|
| Show |
|
89944 |
21 44 19 +28 46 54 |
FYM 25 DG |
2012 |
3 |
164 |
89.6 |
6.94 |
13.77 |
6.83 |
|
|
Septuple system
7 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
Mu1 Cyg |
|
Constellation |
Cygnus |
|
SAO |
89940 |
|
HIP |
107310 |
|
| Tycho2 |
2201-02078-1 |
|
HD |
206826 |
|
HR |
8309 |
|
GC |
30438 |
|
| ADS |
15270 |
|
GL |
Gl 836.6A |
|
BD |
BD+28 4169 |
|
Bayer |
Mu 1 Cygni |
|
| Bayer name |
Mu1 Cyg |
|
Flamsteed |
78 Cygni |
|
Flamsteed name |
78 Cyg |
|
Distance |
22.24 |
|
| Distance ly |
72.55 |
|
Bayer greek |
μ1 Cyg |
|
ORBITAL ELEMENTS
| Period (P) | 692.0588y | ± 94.1386 |
Periastron (T) | 1958.2452y | ± 0.836 |
Semi-major axis (a) | 4.65541a | ± 0.43627 |
| Eccentricity (e) | 0.61798 | ± 0.04089 |
Inclination (i) | 75.219° | ± 0.366 |
Longitude of periastron (ω) | 143.214° | ± 1.759 |
| Node (Ω) | 110.96° | ± 0.411 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
306.9 |
1.891 |
| 2001 |
307.6 |
1.876 |
| 2002 |
308.2 |
1.860 |
| 2003 |
308.9 |
1.844 |
| 2004 |
309.5 |
1.827 |
| 2005 |
310.2 |
1.810 |
| 2006 |
310.9 |
1.792 |
| 2007 |
311.6 |
1.775 |
| 2008 |
312.4 |
1.756 |
| 2009 |
313.1 |
1.738 |
| 2010 |
313.9 |
1.720 |
| 2011 |
314.6 |
1.701 |
| 2012 |
315.4 |
1.682 |
| 2013 |
316.2 |
1.663 |
| 2014 |
317.1 |
1.644 |
| 2015 |
317.9 |
1.625 |
| 2016 |
318.8 |
1.605 |
| 2017 |
319.7 |
1.586 |
| 2018 |
320.6 |
1.567 |
| 2019 |
321.5 |
1.548 |
| 2020 |
322.5 |
1.529 |
| 2021 |
323.4 |
1.510 |
| 2022 |
324.4 |
1.491 |
| 2023 |
325.5 |
1.472 |
| 2024 |
326.5 |
1.453 |
| 2025 |
327.6 |
1.435 |
| 2026 |
328.7 |
1.417 |
| 2027 |
329.9 |
1.400 |
| 2028 |
331.0 |
1.382 |
| 2029 |
332.2 |
1.365 |
| 2030 |
333.5 |
1.348 |
| 2031 |
334.7 |
1.332 |
| 2032 |
336.0 |
1.316 |
| 2033 |
337.3 |
1.301 |
| 2034 |
338.7 |
1.286 |
| 2035 |
340.1 |
1.272 |
| 2036 |
341.5 |
1.258 |
| 2037 |
342.9 |
1.245 |
| 2038 |
344.4 |
1.233 |
| 2039 |
345.9 |
1.221 |
| 2040 |
347.4 |
1.210 |
| 2041 |
349.0 |
1.200 |
| 2042 |
350.6 |
1.190 |
| 2043 |
352.2 |
1.181 |
| 2044 |
353.8 |
1.173 |
| 2045 |
355.5 |
1.166 |
| 2046 |
357.1 |
1.160 |
| 2047 |
358.8 |
1.154 |
| 2048 |
0.5 |
1.150 |
| 2049 |
2.2 |
1.146 |
| 2050 |
4.0 |
1.143 |
|
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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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