20329+4154 BLA 8 (HD 195987)
20h 32m 51.64s +41° 53' 54.5" P.A. 336.00 sep 0.0 mag 7.40,9.10 Sp G9V dist. 22.05 pc (71.93 l.y.)
Coord 2000 |
20329+4154 |
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Discov num |
BLA 8 |
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Comp |
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Coord arcsec 2000 |
20 32 51.64 +41 53 54.5 |
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Date first |
1986 |
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Date last |
2014 |
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Obs |
6 |
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Pa first |
167 |
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Pa last |
336.3 |
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P.A. Now (θ) |
336.3° |
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Sep first |
0.0 |
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Sep last |
0.013 |
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Sep. Now (ρ) |
0.013" |
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Mag pri |
7.40 |
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Mag sec |
9.10 |
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delta mag (ΔM) |
1.7 |
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Spectral class |
G9V (yellow) |
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Pri motion ra |
-153 |
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Sec motion ra |
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Pri motion dec |
+457 |
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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 195987 |
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Constellation |
Cygnus |
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SAO |
49769 |
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HIP |
101382 |
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Tycho2 |
3161-00779-1 |
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HD |
195987 |
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GC |
28603 |
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GL |
Gl 793.1 |
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BD |
BD+41 3799 |
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Distance |
22.05 |
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Distance ly |
71.93 |
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ORBITAL ELEMENTS
Period (P) | 57.322d | ± 0.0002 |
Periastron (T) | 51353.81d (1999.478y) | ± 0.04 |
Semi-major axis (a) | 15.2m | ± 0.3 |
Eccentricity (e) | 0.306 | ± 0.001 |
Inclination (i) | 100° | ± 6.3 |
Longitude of periastron (ω) | 357.4° | ± 0.3 |
Node (Ω) | 330.9° | ± 3.6 |
Notes | n | |
Reference | Ren2010 | |
Equinox | 2000 | |
Last observation | 1991 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000-01-01 |
159.1 |
0.014 |
2001-01-01 |
142.5 |
0.014 |
2002-01-01 |
321.3 |
0.008 |
2003-01-01 |
153.5 |
0.019 |
2004-01-01 |
118.6 |
0.005 |
2005-01-01 |
197.3 |
0.003 |
2006-01-01 |
149.4 |
0.019 |
2007-01-01 |
342.9 |
0.007 |
2008-01-01 |
161.1 |
0.013 |
2009-01-01 |
144.2 |
0.015 |
2010-01-01 |
325.7 |
0.010 |
2011-01-01 |
154.5 |
0.018 |
2012-01-01 |
129.8 |
0.007 |
2013-01-01 |
244.4 |
0.002 |
2014-01-01 |
150.3 |
0.020 |
2015-01-01 |
351.9 |
0.005 |
2016-01-01 |
163.7 |
0.011 |
2017-01-01 |
145.6 |
0.017 |
2018-01-01 |
329.1 |
0.010 |
2019-01-01 |
155.6 |
0.017 |
2020-01-01 |
135.6 |
0.009 |
2021-01-01 |
291.2 |
0.003 |
2022-01-01 |
151.2 |
0.020 |
2023-01-01 |
12.2 |
0.003 |
2024-01-01 |
167.6 |
0.009 |
2025-01-01 |
146.8 |
0.018 |
2026-01-01 |
332.4 |
0.010 |
2027-01-01 |
156.8 |
0.016 |
2028-01-01 |
139.1 |
0.011 |
2029-01-01 |
310.0 |
0.005 |
2030-01-01 |
152.1 |
0.020 |
2031-01-01 |
64.1 |
0.002 |
2032-01-01 |
174.0 |
0.006 |
2033-01-01 |
147.9 |
0.019 |
2034-01-01 |
335.8 |
0.010 |
2035-01-01 |
158.3 |
0.015 |
2036-01-01 |
141.6 |
0.013 |
2037-01-01 |
318.7 |
0.007 |
2038-01-01 |
153.0 |
0.019 |
2039-01-01 |
109.1 |
0.004 |
2040-01-01 |
186.6 |
0.004 |
2041-01-01 |
148.9 |
0.019 |
2042-01-01 |
340.3 |
0.008 |
2043-01-01 |
160.1 |
0.013 |
2044-01-01 |
143.5 |
0.015 |
2045-01-01 |
323.8 |
0.009 |
2046-01-01 |
154.0 |
0.019 |
2047-01-01 |
125.8 |
0.006 |
2048-01-01 |
218.7 |
0.003 |
2049-01-01 |
149.9 |
0.020 |
2050-01-01 |
347.1 |
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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