18253+4846 HU 66 AB
18h 25m 18.20s +48° 45' 42.5" P.A. 197.00 sep 0.2 mag 7.90,8.40 Sp G5 dist. 144.72 pc (472.08 l.y.)
Coord 2000 |
18253+4846 |
|
Discov num |
HU 66 |
|
Comp |
AB |
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Coord arcsec 2000 |
18 25 18.20 +48 45 42.5 |
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Date first |
1883 |
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Date last |
2016 |
|
Obs |
65 |
|
Pa first |
24 |
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Pa last |
197.3 |
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P.A. Now (θ) |
197.3° |
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Sep first |
0.5 |
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Sep last |
0.203 |
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Sep. Now (ρ) |
0.203" |
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Mag pri |
7.90 |
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Mag sec |
8.40 |
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delta mag (ΔM) |
0.5 |
|
Spectral class |
G5 (yellow) |
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Pri motion ra |
+024 |
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Sec motion ra |
|
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Pri motion dec |
+003 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
18253+4846 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
47482 |
18 25 18 +48 45 42 |
HU 66 AB |
2016 |
65 |
197 |
0.2 |
7.90 |
8.40 |
0.50 |
Y |
<=== |
Show |
HD 170109 |
47482 |
18 25 18 +48 45 42 |
STT 351 AC |
2021 |
102 |
26 |
1.0 |
7.90 |
8.25 |
0.35 |
Y |
|
Show |
|
|
18 25 18 +48 45 42 |
HU 66 BC |
2019 |
20 |
26 |
0.8 |
8.40 |
8.25 |
0.15 |
Y |
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Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Draco |
|
SAO |
47482 |
|
HIP |
90284 |
|
Tycho2 |
3534-00302-1 |
|
Gaia DR2 |
2123486226905640960 |
|
HD |
170109 |
|
GC |
25163 |
|
ADS |
11344 |
|
BD |
BD+48 2692 |
|
Distance |
144.72 |
|
Distance ly |
472.08 |
|
ORBITAL ELEMENTS
Period (P) | 300y | |
Periastron (T) | 2022y | |
Semi-major axis (a) | 0.392a | |
Eccentricity (e) | 0.546 | |
Inclination (i) | 123.2° | |
Longitude of periastron (ω) | 269.6° | |
Node (Ω) | 59.7° | |
Notes | n | |
Reference | USN2002 | |
Equinox | 2000 | |
Last observation | 1995 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
235.6 |
0.255 |
2001 |
234.3 |
0.248 |
2002 |
232.9 |
0.242 |
2003 |
231.4 |
0.235 |
2004 |
229.8 |
0.227 |
2005 |
228.1 |
0.220 |
2006 |
226.3 |
0.212 |
2007 |
224.3 |
0.204 |
2008 |
222.2 |
0.196 |
2009 |
219.9 |
0.188 |
2010 |
217.4 |
0.179 |
2011 |
214.6 |
0.170 |
2012 |
211.5 |
0.161 |
2013 |
208.1 |
0.152 |
2014 |
204.2 |
0.143 |
2015 |
199.8 |
0.135 |
2016 |
194.8 |
0.126 |
2017 |
189.2 |
0.119 |
2018 |
182.8 |
0.112 |
2019 |
175.7 |
0.106 |
2020 |
167.8 |
0.101 |
2021 |
159.3 |
0.099 |
2022 |
150.4 |
0.097 |
2023 |
141.6 |
0.098 |
2024 |
133.0 |
0.101 |
2025 |
125.0 |
0.105 |
2026 |
117.8 |
0.111 |
2027 |
111.3 |
0.118 |
2028 |
105.5 |
0.125 |
2029 |
100.5 |
0.134 |
2030 |
96.0 |
0.142 |
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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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