19553-0644 STF 2597 AB (HD 188405)
19h 55m 19.49s -06° 44' 04.7" P.A. 100.00 sep 0.6 mag 6.94,7.98 Sp F2V dist. 81.83 pc (266.93 l.y.)
| Coord 2000 |
19553-0644 |
|
Discov num |
STF2597 |
|
Comp |
AB |
|
Coord arcsec 2000 |
19 55 19.49 -06 44 04.7 |
|
| Date first |
1826 |
|
Date last |
2017 |
|
Obs |
143 |
|
| Pa first |
92 |
|
Pa last |
100.1 |
|
P.A. Now (θ) |
100.1° |
|
| Sep first |
1.9 |
|
Sep last |
0.647 |
|
Sep. Now (ρ) |
0.647" |
|
| Mag pri |
6.94 |
|
Mag sec |
7.98 |
|
delta mag (ΔM) |
1.04 |
|
Spectral class |
F2V (yellow-white) |
|
| Pri motion ra |
+030 |
|
Sec motion ra |
|
|
| Pri motion dec |
-062 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
19553-0644 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 188405 |
143911 |
19 55 19 -06 44 05 |
STF 2597 AB |
2017 |
143 |
100 |
0.6 |
6.94 |
7.98 |
1.04 |
Y |
<=== |
| Show |
|
143911 |
19 55 19 -06 44 05 |
BOW 8 AC |
-1 |
0 |
-1 |
-1.0 |
6.94 |
|
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Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 188405 |
|
Constellation |
Aquila |
|
SAO |
143911 |
|
HIP |
98038 |
|
| Tycho2 |
5159-02691-1 |
|
Gaia DR2 |
4196081588186245504 |
|
HD |
188405 |
|
HR |
7599 |
|
| GC |
27580 |
|
ADS |
13104 |
|
BD |
BD-07 5102 |
|
Distance |
81.83 |
|
| Distance ly |
266.93 |
|
ORBITAL ELEMENTS
| Period (P) | 425y | ± 22 |
Periastron (T) | 1974.28y | ± 0.23 |
Semi-major axis (a) | 1.085a | ± 0.024 |
| Eccentricity (e) | 0.9414 | ± 0.002 |
Inclination (i) | 103.05° | ± 0.84 |
Longitude of periastron (ω) | 327.9° | ± 1.7 |
| Node (Ω) | 264.03° | ± 0.77 |
Notes | n | |
Reference | Hrt1996a | |
| Equinox | 2000 | |
Last observation | | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
104.1 |
0.445 |
| 2001 |
103.7 |
0.461 |
| 2002 |
103.4 |
0.478 |
| 2003 |
103.1 |
0.494 |
| 2004 |
102.8 |
0.510 |
| 2005 |
102.5 |
0.525 |
| 2006 |
102.2 |
0.541 |
| 2007 |
102.0 |
0.556 |
| 2008 |
101.7 |
0.571 |
| 2009 |
101.5 |
0.586 |
| 2010 |
101.3 |
0.601 |
| 2011 |
101.1 |
0.616 |
| 2012 |
100.9 |
0.630 |
| 2013 |
100.7 |
0.644 |
| 2014 |
100.5 |
0.658 |
| 2015 |
100.3 |
0.672 |
| 2016 |
100.2 |
0.686 |
| 2017 |
100.0 |
0.700 |
| 2018 |
99.9 |
0.713 |
| 2019 |
99.7 |
0.727 |
| 2020 |
99.6 |
0.740 |
| 2021 |
99.4 |
0.753 |
| 2022 |
99.3 |
0.766 |
| 2023 |
99.2 |
0.779 |
| 2024 |
99.1 |
0.791 |
| 2025 |
98.9 |
0.804 |
| 2026 |
98.8 |
0.816 |
| 2027 |
98.7 |
0.829 |
| 2028 |
98.6 |
0.841 |
| 2029 |
98.5 |
0.853 |
| 2030 |
98.4 |
0.865 |
| 2031 |
98.3 |
0.877 |
| 2032 |
98.2 |
0.888 |
| 2033 |
98.1 |
0.900 |
| 2034 |
98.0 |
0.911 |
| 2035 |
97.9 |
0.923 |
| 2036 |
97.8 |
0.934 |
| 2037 |
97.8 |
0.945 |
| 2038 |
97.7 |
0.956 |
| 2039 |
97.6 |
0.967 |
| 2040 |
97.5 |
0.978 |
| 2041 |
97.4 |
0.989 |
| 2042 |
97.3 |
1.000 |
| 2043 |
97.3 |
1.010 |
| 2044 |
97.2 |
1.021 |
| 2045 |
97.1 |
1.031 |
| 2046 |
97.1 |
1.041 |
| 2047 |
97.0 |
1.051 |
| 2048 |
96.9 |
1.061 |
| 2049 |
96.9 |
1.071 |
| 2050 |
96.8 |
1.081 |
|
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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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