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 |
|
Discov num |
I 1391 |
|
Comp |
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|
Coord arcsec 2000 |
19 03 58.43 -38 04 02.0 |
|
| Date first |
1926 |
|
Date last |
2021 |
|
Obs |
24 |
|
| Pa first |
114 |
|
Pa last |
119.7 |
|
P.A. Now (θ) |
126.5° |
|
| Sep first |
0.5 |
|
Sep last |
0.264 |
|
Sep. Now (ρ) |
0.253" |
|
| Mag pri |
9.91 |
|
Mag sec |
9.71 |
|
delta mag (ΔM) |
0.2 |
|
Spectral class |
G5V (yellow) |
|
| Pri motion ra |
+005 |
|
Sec motion ra |
|
|
| 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 |
|
Constellation |
Corona Austrina |
|
SAO |
210867 |
|
HIP |
93625 |
|
| Tycho2 |
7917-00132-1 |
|
Gaia DR2 |
6718711044440095232 |
|
HD |
176891 |
|
GC |
26196 |
|
| CD |
CD-3813306 |
|
CP |
CP-38 7691 |
|
Distance |
120.48 |
|
Distance ly |
393.01 |
|
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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