17572+2400 MCA 50 (HD 163840)
17h 57m 14.34s +23° 59' 44.6" P.A. 163.00 sep 0.1 mag 6.30,7.90 Sp G2V+K2V dist. 28.25 pc (92.15 l.y.)
Coord 2000 |
17572+2400 |
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Discov num |
MCA 50 |
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Comp |
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Coord arcsec 2000 |
17 57 14.34 +23 59 44.6 |
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Date first |
1976 |
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Date last |
2012 |
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Obs |
29 |
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Pa first |
160 |
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Pa last |
162.6 |
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P.A. Now (θ) |
162.6° |
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Sep first |
0.1 |
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Sep last |
0.088 |
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Sep. Now (ρ) |
0.088" |
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Mag pri |
6.30 |
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Mag sec |
7.90 |
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delta mag (ΔM) |
1.6 |
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Spectral class |
G2V+K2V (yellow/yellow-orange) |
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Pri motion ra |
-013 |
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Sec motion ra |
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Pri motion dec |
+071 |
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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 163840 |
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Constellation |
Hercules |
|
SAO |
85575 |
|
HIP |
87895 |
|
Tycho2 |
2090-04674-1 |
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Gaia DR2 |
4580864547137360512 |
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HD |
163840 |
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HR |
6697 |
|
GC |
24423 |
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GL |
NN 4039A |
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BD |
BD+24 3283 |
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Distance |
28.25 |
|
Distance ly |
92.15 |
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ORBITAL ELEMENTS
Period (P) | 881.628d (2.41y) | ± 0.064 |
Periastron (T) | 55650.39d (2011.241y) | ± 0.38 |
Semi-major axis (a) | 80.64m | |
Eccentricity (e) | 0.4165 | ± 0.001 |
Inclination (i) | 72.83° | ± 0.47 |
Longitude of periastron (ω) | 135.46° | ± 0.16 |
Node (Ω) | 175.32° | ± 0.44 |
Notes | n | |
Reference | Kie2016 | |
Equinox | 2000 | |
Last observation | 2015 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000-01-01 |
134.0 |
0.045 |
2001-01-01 |
176.5 |
0.092 |
2002-01-01 |
28.9 |
0.038 |
2003-01-01 |
165.5 |
0.098 |
2004-01-01 |
339.2 |
0.035 |
2005-01-01 |
149.4 |
0.065 |
2006-01-01 |
183.2 |
0.071 |
2007-01-01 |
75.3 |
0.028 |
2008-01-01 |
170.0 |
0.101 |
2009-01-01 |
0.4 |
0.053 |
2010-01-01 |
157.8 |
0.082 |
2011-01-01 |
199.4 |
0.037 |
2012-01-01 |
123.3 |
0.037 |
2013-01-01 |
174.5 |
0.097 |
2014-01-01 |
18.3 |
0.045 |
2015-01-01 |
163.6 |
0.095 |
2016-01-01 |
314.2 |
0.021 |
2017-01-01 |
144.5 |
0.057 |
2018-01-01 |
180.1 |
0.081 |
2019-01-01 |
52.9 |
0.030 |
2020-01-01 |
168.2 |
0.101 |
2021-01-01 |
353.8 |
0.050 |
2022-01-01 |
154.9 |
0.075 |
2023-01-01 |
190.3 |
0.052 |
2024-01-01 |
107.8 |
0.031 |
2025-01-01 |
172.6 |
0.100 |
2026-01-01 |
10.2 |
0.050 |
2027-01-01 |
161.5 |
0.090 |
2028-01-01 |
248.1 |
0.016 |
2029-01-01 |
138.0 |
0.049 |
2030-01-01 |
177.6 |
0.089 |
2031-01-01 |
35.5 |
0.035 |
2032-01-01 |
166.4 |
0.099 |
2033-01-01 |
345.3 |
0.041 |
2034-01-01 |
151.4 |
0.068 |
2035-01-01 |
185.1 |
0.066 |
2036-01-01 |
86.9 |
0.028 |
2037-01-01 |
170.8 |
0.101 |
2038-01-01 |
3.5 |
0.053 |
2039-01-01 |
159.1 |
0.085 |
2040-01-01 |
207.6 |
0.029 |
2041-01-01 |
129.1 |
0.041 |
2042-01-01 |
175.5 |
0.094 |
2043-01-01 |
23.1 |
0.041 |
2044-01-01 |
164.6 |
0.096 |
2045-01-01 |
329.9 |
0.028 |
2046-01-01 |
147.1 |
0.061 |
2047-01-01 |
181.5 |
0.077 |
2048-01-01 |
63.5 |
0.028 |
2049-01-01 |
169.1 |
0.101 |
2050-01-01 |
357.2 |
0.052 |
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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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