19069+4137 COU 2197 (HD 178474)
19h 06m 56.22s +41° 37' 19.6" P.A. 320.00 sep 0.3 mag 9.10,9.10 Sp F5
Coord 2000 |
19069+4137 |
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Discov num |
COU2197 |
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Comp |
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Coord arcsec 2000 |
19 06 56.22 +41 37 19.6 |
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Date first |
1984 |
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Date last |
2014 |
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Obs |
16 |
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Pa first |
103 |
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Pa last |
320.1 |
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P.A. Now (θ) |
320.1° |
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Sep first |
0.2 |
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Sep last |
0.262 |
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Sep. Now (ρ) |
0.262" |
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Mag pri |
9.10 |
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Mag sec |
9.10 |
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delta mag (ΔM) |
0 |
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Spectral class |
F5 (yellow-white) |
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Pri motion ra |
+010 |
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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 |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 178474 |
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Constellation |
Lyra |
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SAO |
48095 |
|
Tycho2 |
3128-01528-1 |
|
Gaia DR2 |
2100926344252059904 |
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HD |
178474 |
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ORBITAL ELEMENTS
Period (P) | 46.59y | |
Periastron (T) | 2024.45y | |
Semi-major axis (a) | 0.203a | |
Eccentricity (e) | 0.167 | |
Inclination (i) | 146.7° | |
Longitude of periastron (ω) | 188.8° | |
Node (Ω) | 23.1° | |
Notes | n | |
Reference | Doc2016g | |
Equinox | 2000 | |
Last observation | 2008 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
21.1 |
0.237 |
2001 |
16.5 |
0.236 |
2002 |
11.7 |
0.235 |
2003 |
6.9 |
0.232 |
2004 |
2.0 |
0.229 |
2005 |
356.9 |
0.224 |
2006 |
351.5 |
0.219 |
2007 |
345.9 |
0.213 |
2008 |
340.0 |
0.207 |
2009 |
333.6 |
0.200 |
2010 |
326.8 |
0.193 |
2011 |
319.5 |
0.186 |
2012 |
311.7 |
0.180 |
2013 |
303.3 |
0.174 |
2014 |
294.4 |
0.170 |
2015 |
285.2 |
0.166 |
2016 |
275.5 |
0.164 |
2017 |
265.8 |
0.164 |
2018 |
256.0 |
0.164 |
2019 |
246.3 |
0.165 |
2020 |
236.7 |
0.167 |
2021 |
227.4 |
0.168 |
2022 |
218.1 |
0.169 |
2023 |
209.0 |
0.170 |
2024 |
199.9 |
0.169 |
2025 |
190.6 |
0.168 |
2026 |
181.1 |
0.165 |
2027 |
171.4 |
0.162 |
2028 |
161.3 |
0.160 |
2029 |
150.8 |
0.158 |
2030 |
140.2 |
0.157 |
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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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