21069+3845 STF 2758 AB (61 Cyg)
21h 06m 53.95s +38° 44' 57.9" P.A. 154.00 sep 32.0 mag 5.35,6.10 Sp K5V+K7V dist. 3.49 pc (11.38 l.y.)
| Coord 2000 |
21069+3845 |
|
Discov num |
STF2758 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 06 53.95 +38 44 57.9 |
|
| Date first |
1753 |
|
Date last |
2022 |
|
Obs |
1809 |
|
| Pa first |
35 |
|
Pa last |
153.5 |
|
P.A. Now (θ) |
153.5° |
|
| Sep first |
19.6 |
|
Sep last |
31.99 |
|
Sep. Now (ρ) |
31.99" |
|
| Mag pri |
5.35 |
|
Mag sec |
6.10 |
|
delta mag (ΔM) |
0.75 |
|
Spectral class |
K5V+K7V (yellow-orange/yellow-orange) |
|
| Pri motion ra |
+417 |
|
Sec motion ra |
+412 |
|
| Pri motion dec |
+326 |
|
Sec motion dec |
+313 |
|
| Notes |
N
O
P
(See Notes, Orbital solution, 100-year proper motion) |
|
rPM=0.026 (< 0.3, Physical double)
This double is physical.
21069+3845 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
61 Cyg |
70919 |
21 06 54 +38 44 58 |
STF 2758 AB |
2022 |
1809 |
154 |
32.0 |
5.35 |
6.10 |
0.75 |
Y |
<=== |
| Show |
|
|
21 06 54 +38 44 58 |
STF 2758 AC |
2016 |
7 |
219 |
839.8 |
5.35 |
10.23 |
4.88 |
|
|
| Show |
|
70919 |
21 06 54 +38 44 58 |
STF 2758 AD |
2016 |
5 |
250 |
748.0 |
5.35 |
10.45 |
5.10 |
|
|
| Show |
|
70919 |
21 06 54 +38 44 58 |
STF 2758 AE |
2016 |
13 |
267 |
340.8 |
5.35 |
9.63 |
4.28 |
|
|
| Show |
|
|
21 06 54 +38 44 58 |
STF 2758 AF |
2016 |
11 |
240 |
371.2 |
5.35 |
11.30 |
5.95 |
|
|
| Show |
|
|
21 06 54 +38 44 58 |
STF 2758 AG |
2016 |
14 |
236 |
260.4 |
5.35 |
11.30 |
5.95 |
|
|
| Show |
|
|
21 06 54 +38 44 58 |
STF 2758 AH |
2021 |
34 |
263 |
134.0 |
5.35 |
9.97 |
4.62 |
|
|
| Show |
|
|
21 06 54 +38 44 58 |
SMR 1 AI |
2021 |
16 |
236 |
49.3 |
5.35 |
10.74 |
5.39 |
|
|
| Show |
|
|
21 06 54 +38 44 58 |
HZE 4 AJ |
2015 |
4 |
241 |
17.5 |
5.35 |
|
|
|
|
| Show |
|
|
21 06 54 +38 44 58 |
HZE 4 AK |
2006 |
1 |
83 |
7.8 |
5.35 |
|
|
|
|
| Show |
|
|
21 06 54 +38 44 58 |
SMR 40 AO |
2021 |
12 |
275 |
176.6 |
5.35 |
12.65 |
7.30 |
|
|
| Show |
|
|
21 06 54 +38 44 58 |
SMR 40 AP |
2021 |
11 |
284 |
166.5 |
5.35 |
12.84 |
7.49 |
|
|
| Show |
|
|
21 06 54 +38 44 58 |
SMR 40 AQ |
2021 |
7 |
295 |
76.1 |
5.35 |
13.19 |
7.84 |
|
|
| Show |
|
|
21 06 55 +38 44 32 |
STF 2758 BC |
2016 |
7 |
221 |
827.6 |
6.10 |
10.03 |
3.93 |
|
|
| Show |
|
|
21 06 55 +38 44 32 |
HZE 4 BL |
2006 |
1 |
145 |
9.9 |
6.10 |
|
|
|
|
| Show |
|
|
21 06 55 +38 44 32 |
FYM 106 BM |
2016 |
4 |
238 |
100.7 |
6.10 |
14.30 |
8.20 |
|
|
| Show |
|
|
21 06 55 +38 44 32 |
FYM 106 BN |
2016 |
4 |
152 |
48.3 |
6.05 |
14.40 |
8.35 |
|
|
| Show |
|
|
21 06 55 +38 44 32 |
TNN 15 BR |
2005 |
1 |
77 |
11.5 |
6.10 |
|
|
|
|
18-fold system
18 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
61 Cyg |
|
Var name |
V1803 Cyg |
|
Constellation |
Cygnus |
|
SAO |
70919 |
|
| HIP |
104214 |
|
Tycho2 |
3168-02800-1 |
|
Gaia DR2 |
1872047227813442688 |
|
HD |
201091 |
|
| HR |
8085 |
|
GC |
29509 |
|
ADS |
14636 |
|
GL |
Gl 820A |
|
| BD |
BD+38 4343 |
|
Flamsteed |
61 Cygni |
|
Flamsteed name |
61 Cyg |
|
FK5 |
793 |
|
| Distance |
3.49 |
|
Distance ly |
11.38 |
|
ORBITAL ELEMENTS
| Period (P) | 704.858y | ± 40.221 |
Periastron (T) | 1696.004y | ± 6.742 |
Semi-major axis (a) | 24.57a | ± 3.5 |
| Eccentricity (e) | 0.435 | ± 0.044 |
Inclination (i) | 52.018° | ± 0.443 |
Longitude of periastron (ω) | 154.044° | ± 6.821 |
| Node (Ω) | 174.56° | ± 2.514 |
Notes | n | |
Reference | PkO2021b | |
| Equinox | | |
Last observation | 2019 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
149.8 |
30.638 |
| 2001 |
150.0 |
30.703 |
| 2002 |
150.1 |
30.767 |
| 2003 |
150.3 |
30.830 |
| 2004 |
150.5 |
30.893 |
| 2005 |
150.7 |
30.956 |
| 2006 |
150.9 |
31.017 |
| 2007 |
151.0 |
31.079 |
| 2008 |
151.2 |
31.139 |
| 2009 |
151.4 |
31.199 |
| 2010 |
151.6 |
31.259 |
| 2011 |
151.7 |
31.318 |
| 2012 |
151.9 |
31.376 |
| 2013 |
152.1 |
31.434 |
| 2014 |
152.3 |
31.491 |
| 2015 |
152.4 |
31.548 |
| 2016 |
152.6 |
31.604 |
| 2017 |
152.8 |
31.659 |
| 2018 |
152.9 |
31.714 |
| 2019 |
153.1 |
31.768 |
| 2020 |
153.3 |
31.822 |
| 2021 |
153.5 |
31.875 |
| 2022 |
153.6 |
31.928 |
| 2023 |
153.8 |
31.979 |
| 2024 |
154.0 |
32.031 |
| 2025 |
154.1 |
32.081 |
| 2026 |
154.3 |
32.132 |
| 2027 |
154.4 |
32.181 |
| 2028 |
154.6 |
32.230 |
| 2029 |
154.8 |
32.278 |
| 2030 |
154.9 |
32.326 |
|
|
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 |
|
SUSPECTED ORBITAL ELEMENTS
| Identifier | 21069+3845 STF2758 A |
| coord_arcsec_2000 | 210653.94+384457.8 |
| Period (P) | 4.9y | |
Periastron (T) | 1953.2y | |
Semi-major axis (a) | 0.14a | |
| Eccentricity (e) | 0.5 | |
Inclination (i) | 134° | |
Longitude of periastron (ω) | 295° | |
| Node (Ω) | 94° | |
Notes | n | |
Reference | Dej1960 | |
| Equinox | | |
Last observation | 1958 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
321.9 |
0.165 |
| 2001 |
291.3 |
0.161 |
| 2002 |
214.3 |
0.058 |
| 2003 |
51.6 |
0.112 |
| 2004 |
355.5 |
0.139 |
| 2005 |
318.8 |
0.167 |
| 2006 |
287.8 |
0.157 |
| 2007 |
183.9 |
0.050 |
| 2008 |
44.9 |
0.115 |
| 2009 |
351.1 |
0.142 |
| 2010 |
315.7 |
0.169 |
| 2011 |
284.2 |
0.151 |
| 2012 |
150.1 |
0.053 |
| 2013 |
38.4 |
0.117 |
| 2014 |
346.9 |
0.146 |
| 2015 |
312.7 |
0.170 |
| 2016 |
280.3 |
0.145 |
| 2017 |
124.3 |
0.064 |
| 2018 |
32.3 |
0.119 |
| 2019 |
342.9 |
0.149 |
| 2020 |
309.7 |
0.170 |
| 2021 |
275.9 |
0.137 |
| 2022 |
106.6 |
0.076 |
| 2023 |
26.3 |
0.122 |
| 2024 |
339.1 |
0.152 |
| 2025 |
306.7 |
0.171 |
| 2026 |
270.9 |
0.127 |
| 2027 |
93.7 |
0.087 |
| 2028 |
20.6 |
0.124 |
| 2029 |
335.4 |
0.155 |
| 2030 |
303.7 |
0.170 |
|
|
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 |
|
