20080+4204 A 383 (HD 227855)
20h 08m 00.45s +42° 03' 39.4" P.A. 8.00 sep 0.3 mag 10.37,10.43 Sp F2
| Coord 2000 |
20080+4204 |
|
Discov num |
A 383 |
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Comp |
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Coord arcsec 2000 |
20 08 00.45 +42 03 39.4 |
|
| Date first |
1902 |
|
Date last |
2012 |
|
Obs |
16 |
|
| Pa first |
55 |
|
Pa last |
7.8 |
|
P.A. Now (θ) |
7.8° |
|
| Sep first |
0.3 |
|
Sep last |
0.345 |
|
Sep. Now (ρ) |
0.345" |
|
| Mag pri |
10.37 |
|
Mag sec |
10.43 |
|
delta mag (ΔM) |
0.06 |
|
Spectral class |
F2 (yellow-white) |
|
| Pri motion ra |
-006 |
|
Sec motion ra |
-006 |
|
| Pri motion dec |
-004 |
|
Sec motion dec |
-004 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 227855 |
|
Constellation |
Cygnus |
|
SAO |
49214 |
|
Tycho2 |
3158-01559-1 |
|
| HD |
227855 |
|
ADS |
13418 |
|
ORBITAL ELEMENTS
| Period (P) | 453y | |
Periastron (T) | 2318.9y | |
Semi-major axis (a) | 0.478a | |
| Eccentricity (e) | 0.678 | |
Inclination (i) | 115° | |
Longitude of periastron (ω) | 94° | |
| Node (Ω) | 251° | |
Notes | | |
Reference | Hrt2013c | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
16.7 |
0.351 |
| 2001 |
16.2 |
0.350 |
| 2002 |
15.8 |
0.350 |
| 2003 |
15.3 |
0.350 |
| 2004 |
14.9 |
0.349 |
| 2005 |
14.4 |
0.349 |
| 2006 |
13.9 |
0.348 |
| 2007 |
13.5 |
0.348 |
| 2008 |
13.0 |
0.347 |
| 2009 |
12.5 |
0.347 |
| 2010 |
12.1 |
0.347 |
| 2011 |
11.6 |
0.346 |
| 2012 |
11.1 |
0.346 |
| 2013 |
10.6 |
0.345 |
| 2014 |
10.2 |
0.345 |
| 2015 |
9.7 |
0.345 |
| 2016 |
9.2 |
0.344 |
| 2017 |
8.7 |
0.344 |
| 2018 |
8.3 |
0.344 |
| 2019 |
7.8 |
0.343 |
| 2020 |
7.3 |
0.343 |
| 2021 |
6.8 |
0.343 |
| 2022 |
6.4 |
0.342 |
| 2023 |
5.9 |
0.342 |
| 2024 |
5.4 |
0.342 |
| 2025 |
4.9 |
0.341 |
| 2026 |
4.4 |
0.341 |
| 2027 |
3.9 |
0.341 |
| 2028 |
3.4 |
0.340 |
| 2029 |
3.0 |
0.340 |
| 2030 |
2.5 |
0.340 |
|
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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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