00320+2740 COU 547 (HD 2854)
00h 32m 00.65s +27° 39' 44.1" P.A. 36.00 sep 0.1 mag 8.90,9.10 Sp G0V
| Coord 2000 |
00320+2740 |
|
Discov num |
COU 547 |
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Comp |
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Coord arcsec 2000 |
00 32 00.65 +27 39 44.1 |
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| Date first |
1970 |
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Date last |
2018 |
|
Obs |
39 |
|
| Pa first |
222 |
|
Pa last |
36.2 |
|
P.A. Now (θ) |
36.2° |
|
| Sep first |
0.2 |
|
Sep last |
0.14 |
|
Sep. Now (ρ) |
0.14" |
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| Mag pri |
8.90 |
|
Mag sec |
9.10 |
|
delta mag (ΔM) |
0.2 |
|
Spectral class |
G0V (yellow) |
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| Pri motion ra |
+079 |
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Sec motion ra |
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| Pri motion dec |
+012 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 2854 |
|
Constellation |
Andromeda |
|
SAO |
74069 |
|
Tycho2 |
1737-02134-1 |
|
| Gaia DR2 |
2856104259148838016 |
|
HD |
2854 |
|
ORBITAL ELEMENTS
| Period (P) | 265y | |
Periastron (T) | 1984.9y | |
Semi-major axis (a) | 0.322a | |
| Eccentricity (e) | 0.737 | |
Inclination (i) | 79.9° | |
Longitude of periastron (ω) | 295.9° | |
| Node (Ω) | 31.7° | |
Notes | | |
Reference | Zir2010b | |
| Equinox | 2000 | |
Last observation | 2007 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
40.8 |
0.139 |
| 2001 |
41.7 |
0.139 |
| 2002 |
42.6 |
0.139 |
| 2003 |
43.4 |
0.138 |
| 2004 |
44.3 |
0.137 |
| 2005 |
45.2 |
0.136 |
| 2006 |
46.1 |
0.135 |
| 2007 |
47.0 |
0.134 |
| 2008 |
48.0 |
0.132 |
| 2009 |
49.0 |
0.130 |
| 2010 |
50.0 |
0.129 |
| 2011 |
51.0 |
0.127 |
| 2012 |
52.0 |
0.125 |
| 2013 |
53.1 |
0.123 |
| 2014 |
54.3 |
0.120 |
| 2015 |
55.4 |
0.118 |
| 2016 |
56.7 |
0.116 |
| 2017 |
57.9 |
0.114 |
| 2018 |
59.2 |
0.112 |
| 2019 |
60.6 |
0.109 |
| 2020 |
62.0 |
0.107 |
| 2021 |
63.5 |
0.105 |
| 2022 |
65.1 |
0.102 |
| 2023 |
66.7 |
0.100 |
| 2024 |
68.4 |
0.098 |
| 2025 |
70.2 |
0.096 |
| 2026 |
72.0 |
0.094 |
| 2027 |
74.0 |
0.092 |
| 2028 |
76.0 |
0.090 |
| 2029 |
78.1 |
0.088 |
| 2030 |
80.3 |
0.086 |
|
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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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