15071-0217 A 689 (HD 133928)
15h 07m 08.61s -02° 16' 50.5" P.A. 327.00 sep 0.3 mag 8.20,8.70 Sp F8 dist. 95.24 pc (310.67 l.y.)
Coord 2000 |
15071-0217 |
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Discov num |
A 689 |
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Comp |
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Coord arcsec 2000 |
15 07 08.61 -02 16 50.5 |
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Date first |
1904 |
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Date last |
2016 |
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Obs |
43 |
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Pa first |
315 |
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Pa last |
326.5 |
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P.A. Now (θ) |
326.5° |
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Sep first |
0.3 |
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Sep last |
0.334 |
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Sep. Now (ρ) |
0.334" |
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Mag pri |
8.20 |
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Mag sec |
8.70 |
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delta mag (ΔM) |
0.5 |
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Spectral class |
F8 (yellow-white) |
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Pri motion ra |
-071 |
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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 |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 133928 |
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Constellation |
Libra |
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SAO |
140332 |
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HIP |
73982 |
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Tycho2 |
5004-00384-1 |
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Gaia DR2 |
6339618745351109376 |
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HD |
133928 |
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ADS |
9504 |
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BD |
BD-01 3021 |
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Distance |
95.24 |
|
Distance ly |
310.67 |
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ORBITAL ELEMENTS
Period (P) | 66y | |
Periastron (T) | 1935.6y | |
Semi-major axis (a) | 0.31a | |
Eccentricity (e) | 0.88 | |
Inclination (i) | 103.9° | |
Longitude of periastron (ω) | 65° | |
Node (Ω) | 164° | |
Notes | | |
Reference | Baz1987d | |
Equinox | | |
Last observation | 1982 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
180.0 |
0.074 |
2001 |
167.0 |
0.057 |
2002 |
3.1 |
0.029 |
2003 |
345.0 |
0.101 |
2004 |
341.1 |
0.146 |
2005 |
338.8 |
0.178 |
2006 |
337.1 |
0.203 |
2007 |
335.8 |
0.223 |
2008 |
334.7 |
0.240 |
2009 |
333.7 |
0.255 |
2010 |
332.9 |
0.267 |
2011 |
332.0 |
0.277 |
2012 |
331.3 |
0.286 |
2013 |
330.6 |
0.293 |
2014 |
329.9 |
0.299 |
2015 |
329.2 |
0.304 |
2016 |
328.6 |
0.309 |
2017 |
328.0 |
0.312 |
2018 |
327.4 |
0.315 |
2019 |
326.8 |
0.316 |
2020 |
326.2 |
0.317 |
2021 |
325.6 |
0.318 |
2022 |
325.0 |
0.318 |
2023 |
324.4 |
0.317 |
2024 |
323.8 |
0.316 |
2025 |
323.2 |
0.314 |
2026 |
322.6 |
0.312 |
2027 |
322.0 |
0.310 |
2028 |
321.3 |
0.307 |
2029 |
320.7 |
0.303 |
2030 |
320.0 |
0.299 |
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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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