18301+0404 CHR 72 Aa,Ab
18h 30m 05.12s +04° 03' 55.3" P.A. 285.00 sep 0.1 mag 6.70,9.60 Sp B2V dist. 507.61 pc (1655.82 l.y.)
Coord 2000 |
18301+0404 |
|
Discov num |
CHR 72 |
|
Comp |
Aa,Ab |
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Coord arcsec 2000 |
18 30 05.12 +04 03 55.3 |
|
Date first |
1985 |
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Date last |
2021 |
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Obs |
17 |
|
Pa first |
354 |
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Pa last |
285.1 |
|
P.A. Now (θ) |
285.1° |
|
Sep first |
0.2 |
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Sep last |
0.106 |
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Sep. Now (ρ) |
0.106" |
|
Mag pri |
6.70 |
|
Mag sec |
9.60 |
|
delta mag (ΔM) |
2.9 |
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Spectral class |
B2V (blue-white) |
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Pri motion ra |
+000 |
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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 |
N
O
(See Notes, Orbital solution) |
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This double is physical.
18301+0404 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
123571 |
18 30 05 +04 03 55 |
CHR 72 Aa,Ab |
2021 |
17 |
285 |
0.1 |
6.70 |
9.60 |
2.90 |
Y |
<=== |
Show |
HD 170580 |
123571 |
18 30 05 +04 03 55 |
STF 2322 AB |
2009 |
25 |
172 |
19.8 |
6.67 |
11.28 |
4.61 |
|
|
Show |
|
123571 |
18 30 05 +04 03 55 |
STF 2322 AC |
2015 |
10 |
295 |
67.2 |
6.67 |
12.79 |
6.12 |
|
|
Show |
|
123571 |
18 30 05 +04 03 55 |
STF 2322 AD |
2009 |
7 |
197 |
85.3 |
6.67 |
13.39 |
6.72 |
|
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Quintuple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Ophiuchus |
|
SAO |
123571 |
|
HIP |
90676 |
|
Tycho2 |
0454-01662-1 |
|
Gaia DR2 |
4284093473916591104 |
|
HD |
170580 |
|
HR |
6941 |
|
ADS |
11399 |
|
BD |
BD+03 3727 |
|
FK5 |
3469 |
|
Distance |
507.61 |
|
Distance ly |
1655.82 |
|
ORBITAL ELEMENTS
Period (P) | 70.8y | ± 8.7 |
Periastron (T) | 2008.3y | ± 2.1 |
Semi-major axis (a) | 0.143a | ± 0.025 |
Eccentricity (e) | 0.784 | ± 0.088 |
Inclination (i) | 57.7° | ± 9.2 |
Longitude of periastron (ω) | 101.2° | ± 5.6 |
Node (Ω) | 44° | ± 9.6 |
Notes | n | |
Reference | Tok2021f | |
Equinox | | |
Last observation | 2021 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
20.9 |
0.117 |
2001 |
23.6 |
0.111 |
2002 |
26.6 |
0.104 |
2003 |
30.0 |
0.096 |
2004 |
34.2 |
0.086 |
2005 |
39.6 |
0.074 |
2006 |
47.5 |
0.059 |
2007 |
62.4 |
0.039 |
2008 |
118.0 |
0.017 |
2009 |
203.2 |
0.031 |
2010 |
225.4 |
0.049 |
2011 |
236.6 |
0.062 |
2012 |
244.4 |
0.070 |
2013 |
250.8 |
0.077 |
2014 |
256.2 |
0.082 |
2015 |
261.0 |
0.087 |
2016 |
265.4 |
0.090 |
2017 |
269.5 |
0.094 |
2018 |
273.3 |
0.097 |
2019 |
276.9 |
0.099 |
2020 |
280.3 |
0.102 |
2021 |
283.5 |
0.104 |
2022 |
286.6 |
0.107 |
2023 |
289.6 |
0.109 |
2024 |
292.4 |
0.111 |
2025 |
295.2 |
0.113 |
2026 |
297.8 |
0.115 |
2027 |
300.4 |
0.117 |
2028 |
302.9 |
0.119 |
2029 |
305.3 |
0.121 |
2030 |
307.6 |
0.123 |
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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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