21369+4025 DRS 20 (74 Cyg)
21h 36m 56.98s +40° 24' 48.6" P.A. 58.00 sep 7.0 mag 4.51,13.30 Sp A5V dist. 65.83 pc (214.74 l.y.)
| Coord 2000 |
21369+4025 |
|
Discov num |
DRS 20 |
|
Comp |
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|
Coord arcsec 2000 |
21 36 56.98 +40 24 48.6 |
|
| Date first |
2008 |
|
Date last |
2008 |
|
Obs |
2 |
|
| Pa first |
57 |
|
Pa last |
58.1 |
|
P.A. Now (θ) |
58.1° |
|
| Sep first |
6.9 |
|
Sep last |
6.98 |
|
Sep. Now (ρ) |
6.98" |
|
| Mag pri |
4.51 |
|
Mag sec |
13.30 |
|
delta mag (ΔM) |
8.79 |
|
Spectral class |
A5V (white) |
|
| Pri motion ra |
-001 |
|
Sec motion ra |
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|
| Pri motion dec |
+012 |
|
Sec motion dec |
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| Notes |
N
K
(See Notes, K-band or other infrared magnitudes) |
|
Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
| Name |
74 Cyg |
|
Constellation |
Cygnus |
|
SAO |
51101 |
|
HIP |
106711 |
|
| Tycho2 |
3187-02159-1 |
|
Gaia DR2 |
1966070246674941824 |
|
HD |
205835 |
|
HR |
8266 |
|
| GC |
30263 |
|
BD |
BD+39 4612 |
|
Flamsteed |
74 Cygni |
|
Flamsteed name |
74 Cyg |
|
| FK5 |
811 |
|
Distance |
65.83 |
|
Distance ly |
214.74 |
|
SUSPECTED ORBITAL ELEMENTS
| Identifier | 21369+4025 |
| coord_arcsec_2000 | 213656.98+402448.6 |
| Period (P) | 574.632d | ± 9.4158 |
Periastron (T) | 48579.5391d (1991.882y) | ± 18.6175 |
Semi-major axis (a) | 8.56m | ± 0.91 |
| Eccentricity (e) | 0.5349 | ± 0.1066 |
Inclination (i) | 102.1° | ± 4.39 |
Longitude of periastron (ω) | 306.56° | ± 14.01 |
| Node (Ω) | 18.92° | ± 4.91 |
Notes | n | |
Reference | HIP1997d | |
| Equinox | | |
Last observation | 1991 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
352.2 |
0.004 |
| 2001-01-01 |
200.3 |
0.010 |
| 2002-01-01 |
220.8 |
0.006 |
| 2003-01-01 |
14.1 |
0.005 |
| 2004-01-01 |
204.5 |
0.011 |
| 2005-01-01 |
238.0 |
0.004 |
| 2006-01-01 |
104.0 |
0.001 |
| 2007-01-01 |
208.6 |
0.010 |
| 2008-01-01 |
296.5 |
0.002 |
| 2009-01-01 |
194.4 |
0.007 |
| 2010-01-01 |
213.6 |
0.008 |
| 2011-01-01 |
355.0 |
0.004 |
| 2012-01-01 |
200.7 |
0.010 |
| 2013-01-01 |
221.7 |
0.006 |
| 2014-01-01 |
15.6 |
0.005 |
| 2015-01-01 |
204.8 |
0.011 |
| 2016-01-01 |
240.7 |
0.004 |
| 2017-01-01 |
145.2 |
0.001 |
| 2018-01-01 |
208.9 |
0.010 |
| 2019-01-01 |
304.2 |
0.002 |
| 2020-01-01 |
195.2 |
0.007 |
| 2021-01-01 |
214.2 |
0.008 |
| 2022-01-01 |
357.6 |
0.004 |
| 2023-01-01 |
201.1 |
0.010 |
| 2024-01-01 |
222.8 |
0.006 |
| 2025-01-01 |
17.3 |
0.005 |
| 2026-01-01 |
205.2 |
0.011 |
| 2027-01-01 |
243.7 |
0.003 |
| 2028-01-01 |
165.6 |
0.002 |
| 2029-01-01 |
209.3 |
0.010 |
| 2030-01-01 |
311.7 |
0.002 |
|
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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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