18250-0135 AC 11 (HD 169493)
18h 24m 57.21s -01° 34' 45.6" P.A. 355.00 sep 0.9 mag 6.71,7.21 Sp F0 dist. 133.51 pc (435.51 l.y.)
| Coord 2000 |
18250-0135 |
|
Discov num |
AC 11 |
|
Comp |
|
|
Coord arcsec 2000 |
18 24 57.21 -01 34 45.6 |
|
| Date first |
1854 |
|
Date last |
2021 |
|
Obs |
253 |
|
| Pa first |
178 |
|
Pa last |
354.5 |
|
P.A. Now (θ) |
354.5° |
|
| Sep first |
0.4 |
|
Sep last |
0.909 |
|
Sep. Now (ρ) |
0.909" |
|
| Mag pri |
6.71 |
|
Mag sec |
7.21 |
|
delta mag (ΔM) |
0.5 |
|
Spectral class |
F0 (yellow-white) |
|
| Pri motion ra |
+005 |
|
Sec motion ra |
+005 |
|
| Pri motion dec |
-006 |
|
Sec motion dec |
-006 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 169493 |
|
Constellation |
Serpens |
|
SAO |
142294 |
|
HIP |
90253 |
|
| Tycho2 |
5099-00358-1 |
|
Gaia DR2 |
4271248601112859136 |
|
HD |
169493 |
|
HR |
6898 |
|
| GC |
25131 |
|
ADS |
11324 |
|
BD |
BD-01 3486 |
|
Distance |
133.51 |
|
| Distance ly |
435.51 |
|
ORBITAL ELEMENTS
| Period (P) | 440.6y | ± 121.4 |
Periastron (T) | 1888.7y | ± 7.8 |
Semi-major axis (a) | 0.77a | ± 0.16 |
| Eccentricity (e) | 0.47 | ± 0.1 |
Inclination (i) | 93.3° | ± 0.6 |
Longitude of periastron (ω) | 55.8° | ± 24.8 |
| Node (Ω) | 176.3° | ± 0.4 |
Notes | n | |
Reference | Tok2021f | |
| Equinox | | |
Last observation | 2021 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
355.5 |
0.897 |
| 2001 |
355.4 |
0.898 |
| 2002 |
355.4 |
0.900 |
| 2003 |
355.4 |
0.902 |
| 2004 |
355.3 |
0.903 |
| 2005 |
355.3 |
0.904 |
| 2006 |
355.3 |
0.906 |
| 2007 |
355.3 |
0.907 |
| 2008 |
355.2 |
0.908 |
| 2009 |
355.2 |
0.909 |
| 2010 |
355.2 |
0.910 |
| 2011 |
355.1 |
0.910 |
| 2012 |
355.1 |
0.911 |
| 2013 |
355.1 |
0.912 |
| 2014 |
355.0 |
0.912 |
| 2015 |
355.0 |
0.912 |
| 2016 |
355.0 |
0.913 |
| 2017 |
355.0 |
0.913 |
| 2018 |
354.9 |
0.913 |
| 2019 |
354.9 |
0.913 |
| 2020 |
354.9 |
0.913 |
| 2021 |
354.8 |
0.913 |
| 2022 |
354.8 |
0.913 |
| 2023 |
354.8 |
0.912 |
| 2024 |
354.8 |
0.912 |
| 2025 |
354.7 |
0.912 |
| 2026 |
354.7 |
0.911 |
| 2027 |
354.7 |
0.910 |
| 2028 |
354.6 |
0.910 |
| 2029 |
354.6 |
0.909 |
| 2030 |
354.6 |
0.908 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
