18235-3844 I 1364 (HD 168800)
18h 23m 27.12s -38° 44' 11.3" P.A. 176.00 sep 0.1 mag 9.30,9.50 Sp G8III
Coord 2000 |
18235-3844 |
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Discov num |
I 1364 |
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Comp |
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Coord arcsec 2000 |
18 23 27.12 -38 44 11.3 |
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Date first |
1926 |
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Date last |
2019 |
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Obs |
9 |
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Pa first |
217 |
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Pa last |
176 |
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P.A. Now (θ) |
176° |
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Sep first |
0.4 |
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Sep last |
0.101 |
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Sep. Now (ρ) |
0.101" |
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Mag pri |
9.30 |
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Mag sec |
9.50 |
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delta mag (ΔM) |
0.2 |
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Spectral class |
G8III (yellow) |
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Pri motion ra |
-008 |
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Sec motion ra |
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Pri motion dec |
+009 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 168800 |
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Constellation |
Corona Austrina |
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SAO |
210071 |
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Tycho2 |
7901-02056-1 |
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Gaia DR2 |
6727060903246748160 |
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HD |
168800 |
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ORBITAL ELEMENTS
Period (P) | 500y | |
Periastron (T) | 2123y | |
Semi-major axis (a) | 0.321a | |
Eccentricity (e) | 0 | |
Inclination (i) | 79.7° | |
Longitude of periastron (ω) | 0° | |
Node (Ω) | 31.5° | |
Notes | | |
Reference | Tok2021c | |
Equinox | 2000 | |
Last observation | 2020 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
309.5 |
0.058 |
2001 |
313.4 |
0.059 |
2002 |
317.2 |
0.060 |
2003 |
320.9 |
0.061 |
2004 |
324.4 |
0.062 |
2005 |
327.8 |
0.064 |
2006 |
330.9 |
0.066 |
2007 |
333.9 |
0.068 |
2008 |
336.7 |
0.070 |
2009 |
339.4 |
0.072 |
2010 |
341.9 |
0.074 |
2011 |
344.2 |
0.077 |
2012 |
346.3 |
0.080 |
2013 |
348.4 |
0.082 |
2014 |
350.2 |
0.085 |
2015 |
352.0 |
0.088 |
2016 |
353.7 |
0.091 |
2017 |
355.2 |
0.094 |
2018 |
356.6 |
0.097 |
2019 |
358.0 |
0.100 |
2020 |
359.3 |
0.104 |
2021 |
0.5 |
0.107 |
2022 |
1.6 |
0.110 |
2023 |
2.7 |
0.113 |
2024 |
3.7 |
0.116 |
2025 |
4.6 |
0.120 |
2026 |
5.5 |
0.123 |
2027 |
6.4 |
0.126 |
2028 |
7.2 |
0.130 |
2029 |
8.0 |
0.133 |
2030 |
8.7 |
0.136 |
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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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