18002+8000 STF 2308 AB (41 Dra)
18h 00m 09.07s +80° 00' 13.7" P.A. 232.00 sep 18.9 mag 5.70,6.00 Sp F7V+F7V dist. 63.53 pc (207.23 l.y.)
Coord 2000 |
18002+8000 |
|
Discov num |
STF2308 |
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Comp |
AB |
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Coord arcsec 2000 |
18 00 09.07 +80 00 13.7 |
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Date first |
1782 |
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Date last |
2022 |
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Obs |
184 |
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Pa first |
235 |
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Pa last |
232 |
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P.A. Now (θ) |
232° |
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Sep first |
20.7 |
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Sep last |
18.9 |
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Sep. Now (ρ) |
18.9" |
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Mag pri |
5.70 |
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Mag sec |
6.00 |
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delta mag (ΔM) |
0.3 |
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Spectral class |
F7V+F7V (yellow-white/yellow-white) |
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Pri motion ra |
+047 |
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Sec motion ra |
+055 |
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Pri motion dec |
+124 |
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Sec motion dec |
+131 |
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Notes |
N
O
V
(See Notes, Orbital solution, Proper motion indicates physical) |
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rPM=0.075 (< 0.3, Physical double)
This double is physical.
18002+8000 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
8996 |
18 00 09 +80 00 14 |
BAG 6 Aa,Ab |
2012 |
31 |
316 |
0.1 |
6.22 |
6.69 |
0.47 |
Y |
|
Show |
41 Dra |
8996 |
18 00 09 +80 00 14 |
STF 2308 AB |
2022 |
184 |
232 |
18.9 |
5.70 |
6.00 |
0.30 |
Y |
<=== |
Show |
|
8996 |
18 00 09 +80 00 14 |
STF 2308 AC |
2017 |
17 |
129 |
225.3 |
5.70 |
8.34 |
2.64 |
|
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Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
41 Dra |
|
Var name |
NSV10205 Dra |
|
Constellation |
Draco |
|
SAO |
8996 |
|
HIP |
88136 |
|
Tycho2 |
4578-01433-1 |
|
Gaia DR2 |
2294405824838599808 |
|
HD |
166866 |
|
HR |
6810 |
|
GC |
24669 |
|
ADS |
11061 |
|
BD |
BD+79 571 |
|
Flamsteed |
41 Draconis |
|
Flamsteed name |
41 Dra |
|
Distance |
63.53 |
|
Distance ly |
207.23 |
|
ORBITAL ELEMENTS
Period (P) | 18000y | |
Periastron (T) | 3381y | |
Semi-major axis (a) | 24.74a | |
Eccentricity (e) | 0.84 | |
Inclination (i) | 162° | |
Longitude of periastron (ω) | 138° | |
Node (Ω) | 233° | |
Notes | n | |
Reference | Kis1996 | |
Equinox | 2000 | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
232.2 |
18.959 |
2001 |
232.2 |
18.950 |
2002 |
232.2 |
18.941 |
2003 |
232.1 |
18.932 |
2004 |
232.1 |
18.923 |
2005 |
232.1 |
18.913 |
2006 |
232.1 |
18.904 |
2007 |
232.1 |
18.895 |
2008 |
232.1 |
18.886 |
2009 |
232.0 |
18.877 |
2010 |
232.0 |
18.868 |
2011 |
232.0 |
18.859 |
2012 |
232.0 |
18.849 |
2013 |
232.0 |
18.840 |
2014 |
231.9 |
18.831 |
2015 |
231.9 |
18.822 |
2016 |
231.9 |
18.813 |
2017 |
231.9 |
18.804 |
2018 |
231.9 |
18.795 |
2019 |
231.9 |
18.785 |
2020 |
231.8 |
18.776 |
2021 |
231.8 |
18.767 |
2022 |
231.8 |
18.758 |
2023 |
231.8 |
18.749 |
2024 |
231.8 |
18.740 |
2025 |
231.7 |
18.730 |
2026 |
231.7 |
18.721 |
2027 |
231.7 |
18.712 |
2028 |
231.7 |
18.703 |
2029 |
231.7 |
18.694 |
2030 |
231.7 |
18.684 |
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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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