20237+3729 CIA 20 (HD 194335)
20h 23m 44.37s +37° 28' 35.2" P.A. 21.00 sep 0.0 mag 6.80,7.20 Sp B2III+sdO dist. 414.94 pc (1353.53 l.y.)
| Coord 2000 |
20237+3729 |
|
Discov num |
CIA 20 |
|
Comp |
|
|
Coord arcsec 2000 |
20 23 44.37 +37 28 35.2 |
|
| Date first |
2021 |
|
Date last |
2022 |
|
Obs |
10 |
|
| Pa first |
210 |
|
Pa last |
20.7 |
|
P.A. Now (θ) |
300.1° |
|
| Sep first |
0.0 |
|
Sep last |
0.001 |
|
Sep. Now (ρ) |
0.002" |
|
| Mag pri |
6.80 |
|
Mag sec |
7.20 |
|
delta mag (ΔM) |
0.4 |
|
Spectral class |
B2III+sdO (blue-white) |
|
| Pri motion ra |
+005 |
|
Sec motion ra |
|
|
| Pri motion dec |
+000 |
|
Sec motion dec |
|
|
| Notes |
N
O
K
(See Notes, Orbital solution, 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
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 194335 |
|
Constellation |
Cygnus |
|
SAO |
69951 |
|
HIP |
100574 |
|
| Tycho2 |
2684-02040-1 |
|
HD |
194335 |
|
HR |
7807 |
|
BD |
BD+37 3916 |
|
| Distance |
414.94 |
|
Distance ly |
1353.53 |
|
ORBITAL ELEMENTS
| Period (P) | 63.1475d | ± 0.0029 |
Periastron (T) | 59526d (2021.853y) | ± 0.2 |
Semi-major axis (a) | 1.809m | ± 0.012 |
| Eccentricity (e) | 0 | |
Inclination (i) | 49.5° | ± 0.9 |
Longitude of periastron (ω) | 90° | |
| Node (Ω) | 116.2° | ± 0.9 |
Notes | n | |
Reference | CIA2024a | |
| Equinox | | |
Last observation | | |
Grade | 1 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
75.6 |
0.001 |
| 2001-01-01 |
333.4 |
0.001 |
| 2002-01-01 |
276.9 |
0.002 |
| 2003-01-01 |
182.2 |
0.001 |
| 2004-01-01 |
113.6 |
0.002 |
| 2005-01-01 |
38.8 |
0.001 |
| 2006-01-01 |
309.9 |
0.002 |
| 2007-01-01 |
250.9 |
0.001 |
| 2008-01-01 |
149.2 |
0.002 |
| 2009-01-01 |
93.5 |
0.002 |
| 2010-01-01 |
356.1 |
0.001 |
| 2011-01-01 |
290.7 |
0.002 |
| 2012-01-01 |
212.1 |
0.001 |
| 2013-01-01 |
126.8 |
0.002 |
| 2014-01-01 |
65.9 |
0.001 |
| 2015-01-01 |
325.2 |
0.002 |
| 2016-01-01 |
269.9 |
0.002 |
| 2017-01-01 |
170.5 |
0.001 |
| 2018-01-01 |
107.8 |
0.002 |
| 2019-01-01 |
25.3 |
0.001 |
| 2020-01-01 |
303.8 |
0.002 |
| 2021-01-01 |
240.5 |
0.001 |
| 2022-01-01 |
141.5 |
0.002 |
| 2023-01-01 |
86.2 |
0.002 |
| 2024-01-01 |
345.2 |
0.001 |
| 2025-01-01 |
284.8 |
0.002 |
| 2026-01-01 |
198.5 |
0.001 |
| 2027-01-01 |
120.9 |
0.002 |
| 2028-01-01 |
54.7 |
0.001 |
| 2029-01-01 |
318.0 |
0.002 |
| 2030-01-01 |
262.2 |
0.002 |
| 2031-01-01 |
160.2 |
0.001 |
| 2032-01-01 |
101.7 |
0.002 |
| 2033-01-01 |
11.8 |
0.001 |
| 2034-01-01 |
298.0 |
0.002 |
| 2035-01-01 |
228.6 |
0.001 |
| 2036-01-01 |
134.7 |
0.002 |
| 2037-01-01 |
77.9 |
0.001 |
| 2038-01-01 |
335.6 |
0.001 |
| 2039-01-01 |
278.5 |
0.002 |
| 2040-01-01 |
185.3 |
0.001 |
| 2041-01-01 |
115.1 |
0.002 |
| 2042-01-01 |
42.2 |
0.001 |
| 2043-01-01 |
311.5 |
0.002 |
| 2044-01-01 |
253.4 |
0.001 |
| 2045-01-01 |
151.3 |
0.002 |
| 2046-01-01 |
95.2 |
0.002 |
| 2047-01-01 |
359.2 |
0.001 |
| 2048-01-01 |
292.2 |
0.002 |
| 2049-01-01 |
215.6 |
0.001 |
| 2050-01-01 |
128.3 |
0.002 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
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