19040-3804 I 1391 (HD 176891)
19h 03m 58.43s -38° 04' 02.0" P.A. 120.00 sep 0.3 mag 9.91,9.71 Sp G5V dist. 120.48 pc (393.01 l.y.)
Coord 2000 |
19040-3804 |
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Discov num |
I 1391 |
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Comp |
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Coord arcsec 2000 |
19 03 58.43 -38 04 02.0 |
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Date first |
1926 |
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Date last |
2021 |
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Obs |
24 |
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Pa first |
114 |
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Pa last |
119.7 |
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P.A. Now (θ) |
126.5° |
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Sep first |
0.5 |
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Sep last |
0.264 |
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Sep. Now (ρ) |
0.253" |
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Mag pri |
9.91 |
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Mag sec |
9.71 |
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delta mag (ΔM) |
0.2 |
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Spectral class |
G5V (yellow) |
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Pri motion ra |
+005 |
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Sec motion ra |
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Pri motion dec |
-038 |
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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 176891 |
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Constellation |
Corona Austrina |
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SAO |
210867 |
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HIP |
93625 |
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Tycho2 |
7917-00132-1 |
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Gaia DR2 |
6718711044440095232 |
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HD |
176891 |
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GC |
26196 |
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CD |
CD-3813306 |
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CP |
CP-38 7691 |
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Distance |
120.48 |
|
Distance ly |
393.01 |
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ORBITAL ELEMENTS
Period (P) | 47.38y | ± 0.22 |
Periastron (T) | 2006.14y | ± 0.23 |
Semi-major axis (a) | 0.178a | ± 0.003 |
Eccentricity (e) | 0.641 | ± 0.019 |
Inclination (i) | 35.8° | ± 1.3 |
Longitude of periastron (ω) | 56.4° | ± 5.7 |
Node (Ω) | 271.3° | ± 5.2 |
Notes | | |
Reference | Tok2015c | |
Equinox | 2000 | |
Last observation | 2014 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
207.8 |
0.138 |
2001 |
216.4 |
0.127 |
2002 |
226.6 |
0.115 |
2003 |
239.3 |
0.103 |
2004 |
255.7 |
0.089 |
2005 |
278.9 |
0.073 |
2006 |
315.4 |
0.057 |
2007 |
5.3 |
0.056 |
2008 |
42.1 |
0.075 |
2009 |
62.5 |
0.099 |
2010 |
75.0 |
0.121 |
2011 |
83.7 |
0.142 |
2012 |
90.3 |
0.160 |
2013 |
95.7 |
0.175 |
2014 |
100.2 |
0.189 |
2015 |
104.1 |
0.201 |
2016 |
107.6 |
0.212 |
2017 |
110.8 |
0.221 |
2018 |
113.8 |
0.229 |
2019 |
116.5 |
0.236 |
2020 |
119.2 |
0.242 |
2021 |
121.7 |
0.246 |
2022 |
124.1 |
0.250 |
2023 |
126.5 |
0.253 |
2024 |
128.8 |
0.256 |
2025 |
131.1 |
0.257 |
2026 |
133.3 |
0.258 |
2027 |
135.6 |
0.258 |
2028 |
137.8 |
0.258 |
2029 |
140.1 |
0.257 |
2030 |
142.4 |
0.255 |
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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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