20435+1504 CIA 11 (Del Del)
20h 43m 27.53s +15° 04' 28.5" P.A. 334.00 sep 0.0 mag 4.90,5.00 Sp F0IV-V dist. 68.45 pc (223.28 l.y.)
| Coord 2000 |
20435+1504 |
|
Discov num |
CIA 11 |
|
Comp |
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Coord arcsec 2000 |
20 43 27.53 +15 04 28.5 |
|
| Date first |
2011 |
|
Date last |
2013 |
|
Obs |
11 |
|
| Pa first |
337 |
|
Pa last |
334.1 |
|
P.A. Now (θ) |
334.1° |
|
| Sep first |
0.0 |
|
Sep last |
0.008 |
|
Sep. Now (ρ) |
0.008" |
|
| Mag pri |
4.90 |
|
Mag sec |
5.00 |
|
delta mag (ΔM) |
0.1 |
|
Spectral class |
F0IV-V (yellow-white) |
|
| Pri motion ra |
-020 |
|
Sec motion ra |
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|
| Pri motion dec |
-043 |
|
Sec motion dec |
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| Notes |
N
O
R
(See Notes, Orbital solution, Red magnitudes) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
Del Del |
|
Constellation |
Delphinus |
|
SAO |
106425 |
|
HIP |
102281 |
|
| Tycho2 |
1634-03055-1 |
|
Gaia DR2 |
1762513222314906752 |
|
HD |
197461 |
|
HR |
7928 |
|
| GC |
28873 |
|
BD |
BD+14 4403 |
|
Bayer |
Delta Delphini |
|
Bayer name |
Del Del |
|
| Flamsteed |
11 Delphini |
|
Flamsteed name |
11 Del |
|
FK5 |
778 |
|
Distance |
68.45 |
|
| Distance ly |
223.28 |
|
Bayer greek |
δ Del |
|
ORBITAL ELEMENTS
| Period (P) | 40.6051d | ± 0.00015 |
Periastron (T) | 56823.604d (2014.454y) | ± 0.03 |
Semi-major axis (a) | 5.4707m | ± 0.0039 |
| Eccentricity (e) | 0.6319 | ± 0.0043 |
Inclination (i) | 14.08° | ± 0.19 |
Longitude of periastron (ω) | 67.17° | ± 0.58 |
| Node (Ω) | 65.17° | ± 0.58 |
Notes | | |
Reference | CIA2018a | |
| Equinox | 2000 | |
Last observation | 2013 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
104.5 |
0.002 |
| 2001-01-01 |
95.4 |
0.002 |
| 2002-01-01 |
87.1 |
0.002 |
| 2003-01-01 |
79.5 |
0.002 |
| 2004-01-01 |
72.6 |
0.002 |
| 2005-01-01 |
66.3 |
0.003 |
| 2006-01-01 |
60.6 |
0.003 |
| 2007-01-01 |
55.5 |
0.003 |
| 2008-01-01 |
50.8 |
0.003 |
| 2009-01-01 |
46.5 |
0.003 |
| 2010-01-01 |
42.6 |
0.003 |
| 2011-01-01 |
39.0 |
0.003 |
| 2012-01-01 |
35.6 |
0.004 |
| 2013-01-01 |
32.5 |
0.004 |
| 2014-01-01 |
29.7 |
0.004 |
| 2015-01-01 |
27.0 |
0.004 |
| 2016-01-01 |
24.4 |
0.004 |
| 2017-01-01 |
22.0 |
0.004 |
| 2018-01-01 |
19.8 |
0.004 |
| 2019-01-01 |
17.7 |
0.004 |
| 2020-01-01 |
15.7 |
0.005 |
| 2021-01-01 |
13.8 |
0.005 |
| 2022-01-01 |
12.0 |
0.005 |
| 2023-01-01 |
10.2 |
0.005 |
| 2024-01-01 |
8.6 |
0.005 |
| 2025-01-01 |
7.0 |
0.005 |
| 2026-01-01 |
5.5 |
0.005 |
| 2027-01-01 |
4.0 |
0.005 |
| 2028-01-01 |
2.6 |
0.005 |
| 2029-01-01 |
1.3 |
0.006 |
| 2030-01-01 |
360.0 |
0.006 |
|
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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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