18118+3327 B 2545 AB
18h 11m 45.11s +33° 26' 49.3" P.A. 241.00 sep 0.1 mag 6.50,6.80 Sp A3V dist. 237.53 pc (774.82 l.y.)
Coord 2000 |
18118+3327 |
|
Discov num |
B 2545 |
|
Comp |
AB |
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Coord arcsec 2000 |
18 11 45.11 +33 26 49.3 |
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Date first |
1958 |
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Date last |
2007 |
|
Obs |
66 |
|
Pa first |
233 |
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Pa last |
240.7 |
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P.A. Now (θ) |
198.9° |
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Sep first |
0.1 |
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Sep last |
0.104 |
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Sep. Now (ρ) |
0.055" |
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Mag pri |
6.50 |
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Mag sec |
6.80 |
|
delta mag (ΔM) |
0.3 |
|
Spectral class |
A3V (white) |
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Pri motion ra |
+018 |
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Sec motion ra |
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Pri motion dec |
+015 |
|
Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
18118+3327 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
66733 |
18 11 45 +33 26 49 |
B 2545 AB |
2007 |
66 |
241 |
0.1 |
6.50 |
6.80 |
0.30 |
Y |
<=== |
Show |
NSV10363 |
66733 |
18 11 45 +33 26 49 |
HO 82 AB,C |
2016 |
34 |
221 |
0.7 |
6.08 |
8.99 |
2.91 |
|
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Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Var name |
NSV10363 |
|
Constellation |
Hercules |
|
SAO |
66733 |
|
HIP |
89156 |
|
Tycho2 |
2626-01763-1 |
|
Gaia DR2 |
4604984976092450816 |
|
HD |
166988 |
|
HR |
6814 |
|
GC |
24829 |
|
ADS |
11149 |
|
BD |
BD+33 3044 |
|
Distance |
237.53 |
|
Distance ly |
774.82 |
|
ORBITAL ELEMENTS
Period (P) | 23.9y | ± 1 |
Periastron (T) | 1971.81y | ± 0.81 |
Semi-major axis (a) | 0.062a | ± 0.0005 |
Eccentricity (e) | 0.706 | ± 0.055 |
Inclination (i) | 37.9° | ± 5.8 |
Longitude of periastron (ω) | 172.1° | ± 19 |
Node (Ω) | 244.1° | ± 19 |
Notes | n | |
Reference | Hrt1989 | |
Equinox | 2000 | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
206.9 |
0.066 |
2001 |
213.4 |
0.075 |
2002 |
218.5 |
0.084 |
2003 |
222.7 |
0.091 |
2004 |
226.5 |
0.096 |
2005 |
229.8 |
0.100 |
2006 |
232.9 |
0.103 |
2007 |
235.9 |
0.105 |
2008 |
238.8 |
0.105 |
2009 |
241.8 |
0.105 |
2010 |
244.8 |
0.103 |
2011 |
247.9 |
0.100 |
2012 |
251.3 |
0.095 |
2013 |
255.1 |
0.089 |
2014 |
259.5 |
0.082 |
2015 |
264.9 |
0.073 |
2016 |
272.1 |
0.062 |
2017 |
282.9 |
0.048 |
2018 |
303.3 |
0.033 |
2019 |
358.0 |
0.019 |
2020 |
94.2 |
0.019 |
2021 |
158.0 |
0.028 |
2022 |
185.1 |
0.042 |
2023 |
198.9 |
0.055 |
2024 |
207.6 |
0.067 |
2025 |
214.0 |
0.076 |
2026 |
219.0 |
0.084 |
2027 |
223.1 |
0.091 |
2028 |
226.8 |
0.097 |
2029 |
230.1 |
0.101 |
2030 |
233.2 |
0.103 |
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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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