18455+0530 FIN 332 Aa,Ab
18h 45m 28.36s +05° 30' 00.4" P.A. 142.00 sep 0.0 mag 6.91,7.31 Sp A1V+A1V dist. 188.68 pc (615.47 l.y.)
Coord 2000 |
18455+0530 |
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Discov num |
FIN 332 |
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Comp |
Aa,Ab |
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Coord arcsec 2000 |
18 45 28.36 +05 30 00.4 |
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Date first |
1953 |
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Date last |
2021 |
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Obs |
75 |
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Pa first |
317 |
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Pa last |
141.7 |
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P.A. Now (θ) |
339.6° |
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Sep first |
0.2 |
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Sep last |
0.014 |
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Sep. Now (ρ) |
0.032" |
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Mag pri |
6.91 |
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Mag sec |
7.31 |
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delta mag (ΔM) |
0.4 |
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Spectral class |
A1V+A1V (white/white) |
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Pri motion ra |
-005 |
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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.
18455+0530 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
123886 |
18 45 28 +05 30 00 |
FIN 332 Aa,Ab |
2021 |
75 |
142 |
0.0 |
6.91 |
7.31 |
0.40 |
Y |
<=== |
Show |
HD 173495 |
123886 |
18 45 28 +05 30 00 |
STF 2375 AB |
2019 |
307 |
120 |
2.6 |
6.34 |
6.73 |
0.39 |
Y |
|
Show |
|
123886 |
18 45 28 +05 30 00 |
FIN 332 Ba,Bb |
2021 |
58 |
324 |
0.1 |
7.48 |
7.48 |
0.00 |
Y |
|
Quadruple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Serpens |
|
SAO |
123886 |
|
HIP |
92027 |
|
Tycho2 |
0456-01022-2 |
|
Gaia DR2 |
4285283042432285568 |
|
HD |
173495 |
|
HR |
7048 |
|
ADS |
11640 |
|
BD |
BD+05 3941 |
|
Distance |
188.68 |
|
Distance ly |
615.47 |
|
ORBITAL ELEMENTS
Period (P) | 27.62y | ± 0.16 |
Periastron (T) | 1994y | ± 0.23 |
Semi-major axis (a) | 0.0911a | ± 0.0009 |
Eccentricity (e) | 0.82 | ± 0.012 |
Inclination (i) | 107.9° | ± 1.2 |
Longitude of periastron (ω) | 4.6° | ± 4.1 |
Node (Ω) | 136° | ± 1.2 |
Notes | n | |
Reference | Tok2020k | |
Equinox | | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
321.1 |
0.123 |
2001 |
320.0 |
0.134 |
2002 |
319.0 |
0.143 |
2003 |
318.1 |
0.151 |
2004 |
317.3 |
0.157 |
2005 |
316.6 |
0.161 |
2006 |
315.8 |
0.164 |
2007 |
315.1 |
0.165 |
2008 |
314.5 |
0.165 |
2009 |
313.7 |
0.164 |
2010 |
313.0 |
0.161 |
2011 |
312.3 |
0.157 |
2012 |
311.5 |
0.151 |
2013 |
310.6 |
0.144 |
2014 |
309.6 |
0.135 |
2015 |
308.5 |
0.124 |
2016 |
307.1 |
0.111 |
2017 |
305.3 |
0.096 |
2018 |
302.8 |
0.079 |
2019 |
298.7 |
0.058 |
2020 |
288.9 |
0.033 |
2021 |
212.3 |
0.009 |
2022 |
90.4 |
0.009 |
2023 |
339.6 |
0.032 |
2024 |
329.8 |
0.059 |
2025 |
326.0 |
0.082 |
2026 |
323.6 |
0.100 |
2027 |
322.0 |
0.115 |
2028 |
320.7 |
0.127 |
2029 |
319.6 |
0.138 |
2030 |
318.7 |
0.147 |
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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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