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 |
|
Date last |
2018 |
|
Obs |
267 |
|
| Pa first |
282 |
|
Pa last |
116.6 |
|
P.A. Now (θ) |
116.6° |
|
| Sep first |
0.6 |
|
Sep last |
0.58 |
|
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) |
|
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 |
267 |
117 |
0.6 |
6.57 |
7.77 |
1.20 |
Y |
<=== |
| Show |
|
|
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 |
|
|
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 |
| 2031 |
109.5 |
0.556 |
| 2032 |
109.0 |
0.552 |
| 2033 |
108.5 |
0.547 |
| 2034 |
108.0 |
0.543 |
| 2035 |
107.4 |
0.539 |
| 2036 |
106.8 |
0.535 |
| 2037 |
106.3 |
0.530 |
| 2038 |
105.7 |
0.526 |
| 2039 |
105.1 |
0.522 |
| 2040 |
104.5 |
0.517 |
| 2041 |
103.9 |
0.513 |
| 2042 |
103.3 |
0.508 |
| 2043 |
102.7 |
0.504 |
| 2044 |
102.0 |
0.499 |
| 2045 |
101.4 |
0.495 |
| 2046 |
100.7 |
0.490 |
| 2047 |
100.1 |
0.486 |
| 2048 |
99.4 |
0.482 |
| 2049 |
98.7 |
0.477 |
| 2050 |
98.0 |
0.473 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
