16318-0216 A 693 (HD 148943)
16h 31m 45.09s -02° 15' 36.0" P.A. 94.00 sep 0.2 mag 9.24,9.29 Sp F5 dist. 168.63 pc (550.07 l.y.)
| Coord 2000 |
16318-0216 |
|
Discov num |
A 693 |
|
Comp |
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Coord arcsec 2000 |
16 31 45.09 -02 15 36.0 |
|
| Date first |
1904 |
|
Date last |
2018 |
|
Obs |
52 |
|
| Pa first |
8 |
|
Pa last |
93.9 |
|
P.A. Now (θ) |
81.9° |
|
| Sep first |
0.2 |
|
Sep last |
0.159 |
|
Sep. Now (ρ) |
0.18" |
|
| Mag pri |
9.24 |
|
Mag sec |
9.29 |
|
delta mag (ΔM) |
0.05 |
|
Spectral class |
F5 (yellow-white) |
|
| Pri motion ra |
+021 |
|
Sec motion ra |
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|
| Pri motion dec |
-017 |
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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.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 148943 |
|
Constellation |
Ophiuchus |
|
SAO |
141224 |
|
HIP |
80949 |
|
| Tycho2 |
5052-00207-1 |
|
Gaia DR2 |
4358176437072221952 |
|
HD |
148943 |
|
ADS |
10095 |
|
| BD |
BD-01 3206 |
|
Distance |
168.63 |
|
Distance ly |
550.07 |
|
ORBITAL ELEMENTS
| Period (P) | 96.18y | ± 0.89 |
Periastron (T) | 1991.33y | ± 0.68 |
Semi-major axis (a) | 0.195a | ± 0.003 |
| Eccentricity (e) | 0.278 | ± 0.011 |
Inclination (i) | 129.3° | ± 1.7 |
Longitude of periastron (ω) | 344.2° | ± 3.8 |
| Node (Ω) | 220.9° | ± 2.2 |
Notes | n | |
Reference | Tok2015c | |
| Equinox | 2000 | |
Last observation | 2014 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
192.9 |
0.135 |
| 2001 |
188.1 |
0.132 |
| 2002 |
183.0 |
0.130 |
| 2003 |
177.8 |
0.127 |
| 2004 |
172.3 |
0.125 |
| 2005 |
166.6 |
0.123 |
| 2006 |
160.8 |
0.121 |
| 2007 |
154.8 |
0.120 |
| 2008 |
148.8 |
0.120 |
| 2009 |
142.8 |
0.120 |
| 2010 |
136.8 |
0.121 |
| 2011 |
131.0 |
0.123 |
| 2012 |
125.5 |
0.126 |
| 2013 |
120.1 |
0.129 |
| 2014 |
115.1 |
0.133 |
| 2015 |
110.3 |
0.137 |
| 2016 |
105.8 |
0.142 |
| 2017 |
101.7 |
0.147 |
| 2018 |
97.8 |
0.152 |
| 2019 |
94.1 |
0.157 |
| 2020 |
90.8 |
0.163 |
| 2021 |
87.6 |
0.168 |
| 2022 |
84.7 |
0.174 |
| 2023 |
81.9 |
0.180 |
| 2024 |
79.3 |
0.185 |
| 2025 |
76.8 |
0.191 |
| 2026 |
74.5 |
0.196 |
| 2027 |
72.3 |
0.201 |
| 2028 |
70.2 |
0.206 |
| 2029 |
68.2 |
0.211 |
| 2030 |
66.3 |
0.215 |
|
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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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