18384-0312 A 88 AB
18h 38m 23.80s -03° 11' 37.4" P.A. 13.00 sep 0.1 mag 7.22,7.51 Sp F9V dist. 47.96 pc (156.45 l.y.)
Coord 2000 |
18384-0312 |
|
Discov num |
A 88 |
|
Comp |
AB |
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Coord arcsec 2000 |
18 38 23.80 -03 11 37.4 |
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Date first |
1900 |
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Date last |
2020 |
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Obs |
170 |
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Pa first |
353 |
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Pa last |
12.9 |
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P.A. Now (θ) |
333.2° |
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Sep first |
0.1 |
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Sep last |
0.113 |
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Sep. Now (ρ) |
0.148" |
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Mag pri |
7.22 |
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Mag sec |
7.51 |
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delta mag (ΔM) |
0.29 |
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Spectral class |
F9V (yellow-white) |
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Pri motion ra |
+007 |
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Sec motion ra |
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Pri motion dec |
+037 |
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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.
18384-0312 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
142461 |
18 38 24 -03 11 37 |
A 88 AB |
2020 |
170 |
13 |
0.1 |
7.22 |
7.51 |
0.29 |
Y |
<=== |
Show |
|
142461 |
18 38 24 -03 11 37 |
A 88 AB,C |
1998 |
6 |
115 |
18.5 |
5.87 |
14.00 |
8.13 |
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Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Serpens |
|
SAO |
142461 |
|
HIP |
91394 |
|
Tycho2 |
5117-02162-1 |
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Gaia DR2 |
4259305018664587648 |
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HD |
172088 |
|
HR |
6999 |
|
GC |
25481 |
|
ADS |
11520 |
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BD |
BD-03 4331 |
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Distance |
47.96 |
|
Distance ly |
156.45 |
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ORBITAL ELEMENTS
Period (P) | 12.135y | ± 0.006 |
Periastron (T) | 2007.18y | ± 0.04 |
Semi-major axis (a) | 0.1461a | ± 0.0008 |
Eccentricity (e) | 0.2567 | ± 0.0029 |
Inclination (i) | 123.9° | ± 5 |
Longitude of periastron (ω) | 79.7° | ± 1.5 |
Node (Ω) | 173.4° | ± 0.9 |
Notes | n | |
Reference | Hrt2013d | |
Equinox | 2000 | |
Last observation | | |
Grade | 1 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
310.3 |
0.126 |
2001 |
284.8 |
0.107 |
2002 |
252.8 |
0.102 |
2003 |
222.9 |
0.114 |
2004 |
200.2 |
0.131 |
2005 |
181.5 |
0.136 |
2006 |
160.4 |
0.114 |
2007 |
116.0 |
0.068 |
2008 |
36.5 |
0.080 |
2009 |
3.8 |
0.127 |
2010 |
346.4 |
0.149 |
2011 |
331.1 |
0.146 |
2012 |
313.1 |
0.129 |
2013 |
288.7 |
0.109 |
2014 |
257.2 |
0.102 |
2015 |
226.5 |
0.112 |
2016 |
202.9 |
0.129 |
2017 |
184.0 |
0.137 |
2018 |
163.8 |
0.119 |
2019 |
125.3 |
0.073 |
2020 |
44.3 |
0.074 |
2021 |
6.8 |
0.122 |
2022 |
348.5 |
0.148 |
2023 |
333.2 |
0.148 |
2024 |
315.9 |
0.132 |
2025 |
292.5 |
0.112 |
2026 |
261.7 |
0.102 |
2027 |
230.3 |
0.110 |
2028 |
205.7 |
0.127 |
2029 |
186.5 |
0.137 |
2030 |
167.0 |
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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