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 |
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Discov num |
AC 11 |
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Comp |
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Coord arcsec 2000 |
18 24 57.21 -01 34 45.6 |
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Date first |
1854 |
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Date last |
2021 |
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Obs |
253 |
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Pa first |
178 |
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Pa last |
354.5 |
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P.A. Now (θ) |
354.5° |
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Sep first |
0.4 |
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Sep last |
0.909 |
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Sep. Now (ρ) |
0.909" |
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Mag pri |
6.71 |
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Mag sec |
7.21 |
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delta mag (ΔM) |
0.5 |
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Spectral class |
F0 (yellow-white) |
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Pri motion ra |
+005 |
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Sec motion ra |
+005 |
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Pri motion dec |
-006 |
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Sec motion dec |
-006 |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 169493 |
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Constellation |
Serpens |
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SAO |
142294 |
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HIP |
90253 |
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Tycho2 |
5099-00358-1 |
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Gaia DR2 |
4271248601112859136 |
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HD |
169493 |
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HR |
6898 |
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GC |
25131 |
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ADS |
11324 |
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BD |
BD-01 3486 |
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Distance |
133.51 |
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Distance ly |
435.51 |
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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 |
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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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