18126-7340 HDO 284 AB (HD 165259)
18h 12m 34.05s -73° 40' 20.7" P.A. 273.00 sep 2.0 mag 5.96,9.14 Sp F5V dist. 42.14 pc (137.46 l.y.)
Coord 2000 |
18126-7340 |
|
Discov num |
HDO 284 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 12 34.05 -73 40 20.7 |
|
Date first |
1891 |
|
Date last |
2021 |
|
Obs |
25 |
|
Pa first |
210 |
|
Pa last |
272.5 |
|
P.A. Now (θ) |
272.5° |
|
Sep first |
1.0 |
|
Sep last |
1.953 |
|
Sep. Now (ρ) |
1.953" |
|
Mag pri |
5.96 |
|
Mag sec |
9.14 |
|
delta mag (ΔM) |
3.18 |
|
Spectral class |
F5V (yellow-white) |
|
Pri motion ra |
-055 |
|
Sec motion ra |
-055 |
|
Pri motion dec |
-263 |
|
Sec motion dec |
-263 |
|
Notes |
O
(Orbital solution) |
|
This double is physical.
18126-7340 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
257571 |
18 12 34 -73 40 21 |
TOK 58 Aa,Ab |
2021 |
10 |
97 |
0.3 |
5.90 |
9.60 |
3.70 |
|
|
Show |
HD 165259 |
257571 |
18 12 34 -73 40 21 |
HDO 284 AB |
2021 |
25 |
273 |
2.0 |
5.96 |
9.14 |
3.18 |
Y |
<=== |
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 165259 |
|
Constellation |
Apus |
|
SAO |
257571 |
|
HIP |
89234 |
|
Tycho2 |
9302-02069-1 |
|
Gaia DR2 |
6417978327725636096 |
|
HD |
165259 |
|
HR |
6751 |
|
GC |
24731 |
|
CD |
CD-73 1348 |
|
CP |
CP-73 1888 |
|
Distance |
42.14 |
|
Distance ly |
137.46 |
|
ORBITAL ELEMENTS
Period (P) | 324.8y | |
Periastron (T) | 2110.09y | |
Semi-major axis (a) | 1.522a | |
Eccentricity (e) | 0.628 | |
Inclination (i) | 15.9° | |
Longitude of periastron (ω) | 5° | |
Node (Ω) | 62.6° | |
Notes | | |
Reference | Lin2016b | |
Equinox | 2000 | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
264.8 |
2.277 |
2001 |
265.1 |
2.269 |
2002 |
265.5 |
2.261 |
2003 |
265.9 |
2.253 |
2004 |
266.3 |
2.245 |
2005 |
266.6 |
2.236 |
2006 |
267.0 |
2.228 |
2007 |
267.4 |
2.219 |
2008 |
267.8 |
2.210 |
2009 |
268.2 |
2.201 |
2010 |
268.6 |
2.192 |
2011 |
269.0 |
2.183 |
2012 |
269.4 |
2.173 |
2013 |
269.8 |
2.163 |
2014 |
270.2 |
2.154 |
2015 |
270.6 |
2.144 |
2016 |
271.1 |
2.133 |
2017 |
271.5 |
2.123 |
2018 |
271.9 |
2.113 |
2019 |
272.3 |
2.102 |
2020 |
272.8 |
2.091 |
2021 |
273.2 |
2.080 |
2022 |
273.7 |
2.069 |
2023 |
274.1 |
2.058 |
2024 |
274.6 |
2.046 |
2025 |
275.0 |
2.034 |
2026 |
275.5 |
2.022 |
2027 |
276.0 |
2.010 |
2028 |
276.5 |
1.998 |
2029 |
276.9 |
1.986 |
2030 |
277.4 |
1.973 |
2031 |
277.9 |
1.960 |
2032 |
278.4 |
1.947 |
2033 |
278.9 |
1.934 |
2034 |
279.5 |
1.921 |
2035 |
280.0 |
1.908 |
2036 |
280.5 |
1.894 |
2037 |
281.1 |
1.880 |
2038 |
281.6 |
1.866 |
2039 |
282.2 |
1.852 |
2040 |
282.7 |
1.837 |
2041 |
283.3 |
1.823 |
2042 |
283.9 |
1.808 |
2043 |
284.5 |
1.793 |
2044 |
285.1 |
1.778 |
2045 |
285.7 |
1.762 |
2046 |
286.3 |
1.747 |
2047 |
287.0 |
1.731 |
2048 |
287.6 |
1.715 |
2049 |
288.3 |
1.699 |
2050 |
288.9 |
1.682 |
|
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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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