19431-0818 STFA 45 AB (HD 186158)
19h 43m 03.26s -08° 18' 26.2" P.A. 145.00 sep 96.3 mag 7.11,7.56 Sp F4V+F5V dist. 72.2 pc (235.52 l.y.)
| Coord 2000 |
19431-0818 |
|
Discov num |
STFA 45 |
|
Comp |
AB |
|
Coord arcsec 2000 |
19 43 03.26 -08 18 26.2 |
|
| Date first |
1823 |
|
Date last |
2018 |
|
Obs |
43 |
|
| Pa first |
147 |
|
Pa last |
145.4 |
|
P.A. Now (θ) |
145.4° |
|
| Sep first |
97.1 |
|
Sep last |
96.268 |
|
Sep. Now (ρ) |
96.268" |
|
| Mag pri |
7.11 |
|
Mag sec |
7.56 |
|
delta mag (ΔM) |
0.45 |
|
Spectral class |
F4V+F5V (yellow-white/yellow-white) |
|
| Pri motion ra |
+026 |
|
Sec motion ra |
+017 |
|
| Pri motion dec |
-056 |
|
Sec motion dec |
-057 |
|
| Notes |
N
V
(See Notes, Proper motion indicates physical) |
|
rPM=0.147 (< 0.3, Physical double)
This double is physical.
19431-0818 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 186158 |
143722 |
19 43 03 -08 18 26 |
STFA 45 AB |
2018 |
43 |
145 |
96.3 |
7.11 |
7.56 |
0.45 |
|
<=== |
| Show |
|
143724 |
19 43 07 -08 19 46 |
HDS 2799 Ba,Bb |
2021 |
4 |
232 |
0.5 |
7.69 |
10.60 |
2.91 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 186158 |
|
Constellation |
Aquila |
|
SAO |
143722 |
|
HIP |
97016 |
|
| Tycho2 |
5724-02578-1 |
|
Gaia DR2 |
4194768049747165568 |
|
HD |
186158 |
|
GC |
27279 |
|
| BD |
BD-08 5078 |
|
Distance |
72.2 |
|
Distance ly |
235.52 |
|
SUSPECTED ORBITAL ELEMENTS
| Identifier | 19431-0818 |
| coord_arcsec_2000 | 194303.27-081826.6 |
| Period (P) | 898.6192d (2.46y) | ± 38.1478 |
Periastron (T) | 48482.9609d (1991.618y) | ± 270.4615 |
Semi-major axis (a) | 11.58m | ± 1.06 |
| Eccentricity (e) | 0.1991 | ± 0.1919 |
Inclination (i) | 142.17° | ± 14.77 |
Longitude of periastron (ω) | 271.87° | ± 123.84 |
| Node (Ω) | 128.24° | ± 21.85 |
Notes | n | |
Reference | HIP1997d | |
| Equinox | | |
Last observation | 1991 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
64.5 |
0.011 |
| 2001-01-01 |
306.7 |
0.011 |
| 2002-01-01 |
117.2 |
0.011 |
| 2003-01-01 |
358.2 |
0.012 |
| 2004-01-01 |
193.8 |
0.008 |
| 2005-01-01 |
54.7 |
0.011 |
| 2006-01-01 |
296.4 |
0.011 |
| 2007-01-01 |
108.2 |
0.012 |
| 2008-01-01 |
349.2 |
0.012 |
| 2009-01-01 |
174.8 |
0.008 |
| 2010-01-01 |
44.8 |
0.011 |
| 2011-01-01 |
284.6 |
0.010 |
| 2012-01-01 |
99.4 |
0.012 |
| 2013-01-01 |
340.5 |
0.012 |
| 2014-01-01 |
159.0 |
0.009 |
| 2015-01-01 |
34.8 |
0.011 |
| 2016-01-01 |
270.7 |
0.009 |
| 2017-01-01 |
90.5 |
0.012 |
| 2018-01-01 |
331.9 |
0.012 |
| 2019-01-01 |
145.9 |
0.010 |
| 2020-01-01 |
24.8 |
0.011 |
| 2021-01-01 |
253.7 |
0.008 |
| 2022-01-01 |
81.5 |
0.011 |
| 2023-01-01 |
323.2 |
0.012 |
| 2024-01-01 |
134.7 |
0.011 |
| 2025-01-01 |
15.1 |
0.011 |
| 2026-01-01 |
233.4 |
0.007 |
| 2027-01-01 |
72.2 |
0.011 |
| 2028-01-01 |
314.2 |
0.011 |
| 2029-01-01 |
124.7 |
0.011 |
| 2030-01-01 |
5.6 |
0.011 |
|
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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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