18181-0120 HDS 2587 AB (HD 168073)
18h 18m 05.51s -01° 19' 48.5" P.A. 181.00 sep 0.1 mag 7.78,9.34 Sp A0 dist. 227.79 pc (743.05 l.y.)
Coord 2000 |
18181-0120 |
|
Discov num |
HDS2587 |
|
Comp |
AB |
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Coord arcsec 2000 |
18 18 05.51 -01 19 48.5 |
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Date first |
1991 |
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Date last |
2019 |
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Obs |
7 |
|
Pa first |
350 |
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Pa last |
181.4 |
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P.A. Now (θ) |
181.4° |
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Sep first |
0.1 |
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Sep last |
0.103 |
|
Sep. Now (ρ) |
0.103" |
|
Mag pri |
7.78 |
|
Mag sec |
9.34 |
|
delta mag (ΔM) |
1.56 |
|
Spectral class |
A0 (white) |
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Pri motion ra |
+002 |
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Sec motion ra |
|
|
Pri motion dec |
+002 |
|
Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
18181-0120 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 168073 |
142206 |
18 18 06 -01 19 48 |
HDS 2587 AB |
2019 |
7 |
181 |
0.1 |
7.78 |
9.34 |
1.56 |
Y |
<=== |
Show |
|
142206 |
18 18 06 -01 19 48 |
GII 265 AC |
2013 |
1 |
167 |
1.8 |
7.78 |
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Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 168073 |
|
Constellation |
Serpens |
|
SAO |
142206 |
|
HIP |
89680 |
|
Tycho2 |
5098-00553-1 |
|
HD |
168073 |
|
BD |
BD-01 3469 |
|
Distance |
227.79 |
|
Distance ly |
743.05 |
|
SUSPECTED ORBITAL ELEMENTS
Identifier | 18181-0120 HDS2587 |
coord_arcsec_2000 | 181805.51-011948.5 |
Period (P) | 72.865y | |
Periastron (T) | 2011.774y | |
Semi-major axis (a) | 0.13a | |
Eccentricity (e) | 0.3 | |
Inclination (i) | 55.5° | |
Longitude of periastron (ω) | 100.2° | |
Node (Ω) | 8.8° | |
Notes | n | |
Reference | Tok2018e | |
Equinox | 2000 | |
Last observation | 2018 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
13.3 |
0.119 |
2001 |
16.6 |
0.114 |
2002 |
20.3 |
0.108 |
2003 |
24.4 |
0.102 |
2004 |
29.0 |
0.095 |
2005 |
34.5 |
0.087 |
2006 |
41.1 |
0.079 |
2007 |
49.2 |
0.071 |
2008 |
59.3 |
0.063 |
2009 |
71.9 |
0.057 |
2010 |
87.0 |
0.053 |
2011 |
103.7 |
0.052 |
2012 |
120.0 |
0.054 |
2013 |
134.2 |
0.059 |
2014 |
145.9 |
0.066 |
2015 |
155.3 |
0.073 |
2016 |
162.9 |
0.081 |
2017 |
169.2 |
0.088 |
2018 |
174.5 |
0.095 |
2019 |
179.2 |
0.101 |
2020 |
183.4 |
0.106 |
2021 |
187.2 |
0.111 |
2022 |
190.8 |
0.114 |
2023 |
194.2 |
0.117 |
2024 |
197.4 |
0.119 |
2025 |
200.6 |
0.120 |
2026 |
203.7 |
0.120 |
2027 |
206.9 |
0.120 |
2028 |
210.0 |
0.119 |
2029 |
213.2 |
0.118 |
2030 |
216.5 |
0.117 |
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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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