18250+2724 STF 2315 AB (HD 169718)
18h 24m 58.46s +27° 23' 41.3" P.A. 117.00 sep 0.6 mag 6.57,7.77 Sp A0V+A4V dist. 117.51 pc (383.32 l.y.)
Coord 2000 |
18250+2724 |
|
Discov num |
STF2315 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 24 58.46 +27 23 41.3 |
|
Date first |
1828 |
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Date last |
2018 |
|
Obs |
265 |
|
Pa first |
282 |
|
Pa last |
116.6 |
|
P.A. Now (θ) |
116.6° |
|
Sep first |
0.6 |
|
Sep last |
0.58 |
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Sep. Now (ρ) |
0.58" |
|
Mag pri |
6.57 |
|
Mag sec |
7.77 |
|
delta mag (ΔM) |
1.2 |
|
Spectral class |
A0V+A4V (white/white) |
|
Pri motion ra |
+003 |
|
Sec motion ra |
+003 |
|
Pri motion dec |
-012 |
|
Sec motion dec |
-012 |
|
Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
18250+2724 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 169718 |
86019 |
18 24 58 +27 23 41 |
STF 2315 AB |
2018 |
265 |
117 |
0.6 |
6.57 |
7.77 |
1.20 |
Y |
<=== |
Show |
|
86019 |
18 24 58 +27 23 41 |
STF 2315 AC |
2002 |
4 |
79 |
44.9 |
6.57 |
13.90 |
7.33 |
|
|
Show |
|
86019 |
18 24 58 +27 23 41 |
BU 9009 AD |
2002 |
3 |
290 |
118.0 |
6.57 |
11.40 |
4.83 |
|
|
Show |
|
|
18 24 50 +27 24 21 |
HO 84 DE |
2015 |
33 |
322 |
4.4 |
11.40 |
13.40 |
2.00 |
|
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Quintuple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 169718 |
|
Constellation |
Hercules |
|
SAO |
86019 |
|
HIP |
90256 |
|
Tycho2 |
2101-02501-1 |
|
Gaia DR2 |
4585618899835473408 |
|
HD |
169718 |
|
HR |
6904 |
|
GC |
25147 |
|
ADS |
11334 |
|
BD |
BD+27 3016 |
|
Distance |
117.51 |
|
Distance ly |
383.32 |
|
ORBITAL ELEMENTS
Period (P) | 2094y | |
Periastron (T) | 1982y | |
Semi-major axis (a) | 2.062a | |
Eccentricity (e) | 0.6877 | |
Inclination (i) | 107.6° | |
Longitude of periastron (ω) | 352.4° | |
Node (Ω) | 127.7° | |
Notes | n | |
Reference | WSI2004b | |
Equinox | 2000 | |
Last observation | 2003 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
123.1 |
0.644 |
2001 |
122.7 |
0.643 |
2002 |
122.3 |
0.642 |
2003 |
121.9 |
0.640 |
2004 |
121.5 |
0.639 |
2005 |
121.1 |
0.637 |
2006 |
120.7 |
0.635 |
2007 |
120.3 |
0.633 |
2008 |
119.9 |
0.631 |
2009 |
119.5 |
0.629 |
2010 |
119.1 |
0.627 |
2011 |
118.7 |
0.624 |
2012 |
118.3 |
0.622 |
2013 |
117.9 |
0.619 |
2014 |
117.5 |
0.616 |
2015 |
117.0 |
0.613 |
2016 |
116.6 |
0.610 |
2017 |
116.2 |
0.607 |
2018 |
115.7 |
0.604 |
2019 |
115.3 |
0.601 |
2020 |
114.8 |
0.597 |
2021 |
114.4 |
0.594 |
2022 |
113.9 |
0.591 |
2023 |
113.5 |
0.587 |
2024 |
113.0 |
0.583 |
2025 |
112.5 |
0.579 |
2026 |
112.1 |
0.576 |
2027 |
111.6 |
0.572 |
2028 |
111.1 |
0.568 |
2029 |
110.6 |
0.564 |
2030 |
110.1 |
0.560 |
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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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