17305-1006 RST 3978 (HD 158577)
17h 30m 29.30s -10° 05' 46.3" P.A. 273.00 sep 0.5 mag 8.42,10.61 Sp G5 dist. 51.49 pc (167.96 l.y.)
Coord 2000 |
17305-1006 |
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Discov num |
RST3978 |
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Comp |
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Coord arcsec 2000 |
17 30 29.30 -10 05 46.3 |
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Date first |
1938 |
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Date last |
2019 |
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Obs |
13 |
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Pa first |
110 |
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Pa last |
272.7 |
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P.A. Now (θ) |
275.2° |
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Sep first |
0.5 |
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Sep last |
0.454 |
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Sep. Now (ρ) |
0.478" |
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Mag pri |
8.42 |
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Mag sec |
10.61 |
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delta mag (ΔM) |
2.19 |
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Spectral class |
G5 (yellow) |
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Pri motion ra |
+014 |
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Sec motion ra |
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Pri motion dec |
-028 |
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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 158577 |
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Constellation |
Ophiuchus |
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SAO |
160596 |
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HIP |
85675 |
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Tycho2 |
5663-00327-1 |
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Gaia DR2 |
4166491118945325056 |
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HD |
158577 |
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GC |
23703 |
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BD |
BD-09 4562 |
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Distance |
51.49 |
|
Distance ly |
167.96 |
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ORBITAL ELEMENTS
Period (P) | 49.24y | ± 1.19 |
Periastron (T) | 1981.1y | ± 1.52 |
Semi-major axis (a) | 0.547a | ± 0.044 |
Eccentricity (e) | 0.343 | ± 0.09 |
Inclination (i) | 83° | ± 2.2 |
Longitude of periastron (ω) | 79.5° | ± 7.4 |
Node (Ω) | 276.8° | ± 1.8 |
Notes | | |
Reference | Tok2015c | |
Equinox | 2000 | |
Last observation | 2014 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
107.5 |
0.390 |
2001 |
109.3 |
0.353 |
2002 |
111.6 |
0.314 |
2003 |
114.5 |
0.273 |
2004 |
118.5 |
0.231 |
2005 |
124.2 |
0.189 |
2006 |
133.1 |
0.149 |
2007 |
147.9 |
0.114 |
2008 |
172.5 |
0.092 |
2009 |
203.5 |
0.092 |
2010 |
227.7 |
0.115 |
2011 |
242.3 |
0.151 |
2012 |
251.0 |
0.191 |
2013 |
256.7 |
0.232 |
2014 |
260.6 |
0.273 |
2015 |
263.6 |
0.313 |
2016 |
265.9 |
0.350 |
2017 |
267.7 |
0.385 |
2018 |
269.3 |
0.415 |
2019 |
270.6 |
0.441 |
2020 |
271.9 |
0.462 |
2021 |
273.0 |
0.475 |
2022 |
274.1 |
0.481 |
2023 |
275.2 |
0.478 |
2024 |
276.3 |
0.464 |
2025 |
277.5 |
0.437 |
2026 |
279.0 |
0.398 |
2027 |
280.8 |
0.344 |
2028 |
283.4 |
0.276 |
2029 |
288.0 |
0.195 |
2030 |
300.0 |
0.107 |
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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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