21148+3803 AGC 13 AB (Tau Cyg)
21h 14m 47.49s +38° 02' 43.1" P.A. 190.00 sep 1.1 mag 3.83,6.57 Sp F3V+F7V dist. 20.34 pc (66.35 l.y.)
| Coord 2000 |
21148+3803 |
|
Discov num |
AGC 13 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 14 47.49 +38 02 43.1 |
|
| Date first |
1874 |
|
Date last |
2017 |
|
Obs |
358 |
|
| Pa first |
163 |
|
Pa last |
189.7 |
|
P.A. Now (θ) |
172.5° |
|
| Sep first |
1.1 |
|
Sep last |
1.05 |
|
Sep. Now (ρ) |
1.018" |
|
| Mag pri |
3.83 |
|
Mag sec |
6.57 |
|
delta mag (ΔM) |
2.74 |
|
Spectral class |
F3V+F7V (yellow-white/yellow-white) |
|
| Pri motion ra |
+196 |
|
Sec motion ra |
+159 |
|
| Pri motion dec |
+410 |
|
Sec motion dec |
+431 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.093 (< 0.3, Physical double)
This double is physical.
21148+3803 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
Tau Cyg |
71121 |
21 14 47 +38 02 43 |
AGC 13 AB |
2017 |
358 |
190 |
1.1 |
3.83 |
6.57 |
2.74 |
Y |
<=== |
| Show |
|
71121 |
21 14 47 +38 02 43 |
AGC 13 AC |
2012 |
11 |
211 |
73.0 |
3.83 |
12.20 |
8.37 |
|
|
| Show |
|
71121 |
21 14 47 +38 02 43 |
AGC 13 AB,D |
2004 |
15 |
208 |
205.4 |
3.83 |
9.94 |
6.11 |
|
|
| Show |
|
71121 |
21 14 47 +38 02 43 |
AGC 13 AE |
2012 |
6 |
257 |
86.9 |
3.83 |
12.40 |
8.57 |
|
|
| Show |
|
71121 |
21 14 47 +38 02 43 |
AGC 13 AF |
2012 |
37 |
184 |
89.5 |
3.83 |
11.95 |
8.12 |
|
|
| Show |
|
71121 |
21 14 47 +38 02 43 |
DAL 38 AG |
2007 |
4 |
109 |
120.9 |
3.83 |
12.50 |
8.67 |
|
|
| Show |
|
71121 |
21 14 47 +38 02 43 |
LEP 100 AI |
2002 |
2 |
77 |
534.5 |
3.83 |
16.02 |
12.19 |
|
|
| Show |
|
71121 |
21 14 47 +38 02 43 |
FYM 110 AJ |
2012 |
3 |
127 |
49.7 |
3.83 |
14.00 |
10.17 |
|
|
| Show |
|
71121 |
21 14 47 +38 02 43 |
FYM 110 AK |
2012 |
3 |
316 |
99.0 |
3.83 |
14.40 |
10.57 |
|
|
| Show |
|
71121 |
21 14 47 +38 02 43 |
FYM 110 AL |
2012 |
2 |
290 |
32.8 |
3.83 |
14.90 |
11.07 |
|
|
| Show |
|
|
21 14 57 +38 02 09 |
DAL 38 GH |
2015 |
7 |
108 |
8.6 |
12.50 |
13.20 |
0.70 |
|
|
| Show |
|
|
21 14 47 +38 01 14 |
JOD 20 Fa,Fb |
2018 |
4 |
349 |
0.9 |
12.20 |
13.80 |
1.60 |
|
|
13-fold system
13 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
Tau Cyg |
|
Constellation |
Cygnus |
|
SAO |
71121 |
|
HIP |
104887 |
|
| Tycho2 |
3169-03876-1 |
|
HD |
202444 |
|
HR |
8130 |
|
GC |
29723 |
|
| ADS |
14787 |
|
GL |
Gl 822.1A |
|
BD |
BD+37 4240 |
|
Bayer |
Tau Cygni |
|
| Bayer name |
Tau Cyg |
|
Flamsteed |
65 Cygni |
|
Flamsteed name |
65 Cyg |
|
Distance |
20.34 |
|
| Distance ly |
66.35 |
|
Bayer greek |
τ Cyg |
|
ORBITAL ELEMENTS
| Period (P) | 49.524y | ± 1.0024 |
Periastron (T) | 1938.9519y | ± 0.4201 |
Semi-major axis (a) | 0.92224a | ± 0.01016 |
| Eccentricity (e) | 0.24535 | ± 0.00446 |
Inclination (i) | 133.242° | ± 0.528 |
Longitude of periastron (ω) | 116.416° | ± 3.657 |
| Node (Ω) | 161.343° | ± 1.667 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2013 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
304.1 |
0.801 |
| 2001 |
297.6 |
0.789 |
| 2002 |
290.9 |
0.777 |
| 2003 |
284.0 |
0.766 |
| 2004 |
277.0 |
0.758 |
| 2005 |
269.8 |
0.753 |
| 2006 |
262.5 |
0.753 |
| 2007 |
255.3 |
0.757 |
| 2008 |
248.2 |
0.765 |
| 2009 |
241.3 |
0.779 |
| 2010 |
234.7 |
0.796 |
| 2011 |
228.3 |
0.817 |
| 2012 |
222.4 |
0.840 |
| 2013 |
216.7 |
0.864 |
| 2014 |
211.4 |
0.890 |
| 2015 |
206.3 |
0.915 |
| 2016 |
201.5 |
0.940 |
| 2017 |
197.0 |
0.962 |
| 2018 |
192.7 |
0.982 |
| 2019 |
188.5 |
0.999 |
| 2020 |
184.4 |
1.011 |
| 2021 |
180.4 |
1.019 |
| 2022 |
176.5 |
1.021 |
| 2023 |
172.5 |
1.018 |
| 2024 |
168.5 |
1.007 |
| 2025 |
164.4 |
0.990 |
| 2026 |
160.1 |
0.965 |
| 2027 |
155.6 |
0.933 |
| 2028 |
150.6 |
0.892 |
| 2029 |
145.2 |
0.844 |
| 2030 |
139.0 |
0.789 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
SUSPECTED ORBITAL ELEMENTS
| Identifier | 21148+3803 AGC 13 B |
| coord_arcsec_2000 | 211447.35+380239.6 |
| Period (P) | 810d (2.22y) | ± 18 |
Periastron (T) | 53139m (2004.367y) | ± 48 |
Semi-major axis (a) | 0.796m | ± 0.149 |
| Eccentricity (e) | 0.43 | ± 0.17 |
Inclination (i) | 92.6° | ± 1.9 |
Longitude of periastron (ω) | 90° | ± 19 |
| Node (Ω) | 78.7° | ± 2.5 |
Notes | n | |
Reference | Mut2010e | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
263.2 |
|
| 2001-01-01 |
216.9 |
|
| 2002-01-01 |
77.2 |
|
| 2003-01-01 |
251.2 |
|
| 2004-01-01 |
79.6 |
0.001 |
| 2005-01-01 |
255.3 |
0.001 |
| 2006-01-01 |
81.5 |
0.001 |
| 2007-01-01 |
257.4 |
0.001 |
| 2008-01-01 |
84.9 |
|
| 2009-01-01 |
259.4 |
0.001 |
| 2010-01-01 |
100.8 |
|
| 2011-01-01 |
62.8 |
|
| 2012-01-01 |
243.2 |
|
| 2013-01-01 |
78.5 |
0.001 |
| 2014-01-01 |
253.4 |
|
| 2015-01-01 |
80.4 |
0.001 |
| 2016-01-01 |
256.2 |
0.001 |
| 2017-01-01 |
82.6 |
0.001 |
| 2018-01-01 |
258.1 |
0.001 |
| 2019-01-01 |
87.7 |
|
| 2020-01-01 |
261.2 |
|
| 2021-01-01 |
168.4 |
|
| 2022-01-01 |
76.2 |
|
| 2023-01-01 |
249.6 |
|
| 2024-01-01 |
79.3 |
0.001 |
| 2025-01-01 |
254.8 |
0.001 |
| 2026-01-01 |
81.1 |
0.001 |
| 2027-01-01 |
257.0 |
0.001 |
| 2028-01-01 |
84.0 |
|
| 2029-01-01 |
258.9 |
0.001 |
| 2030-01-01 |
94.1 |
|
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
