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 |
|
Discov num |
RST3978 |
|
Comp |
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Coord arcsec 2000 |
17 30 29.30 -10 05 46.3 |
|
| Date first |
1938 |
|
Date last |
2019 |
|
Obs |
13 |
|
| Pa first |
110 |
|
Pa last |
272.7 |
|
P.A. Now (θ) |
275.2° |
|
| Sep first |
0.5 |
|
Sep last |
0.454 |
|
Sep. Now (ρ) |
0.478" |
|
| Mag pri |
8.42 |
|
Mag sec |
10.61 |
|
delta mag (ΔM) |
2.19 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
+014 |
|
Sec motion ra |
|
|
| 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 |
|
Constellation |
Ophiuchus |
|
SAO |
160596 |
|
HIP |
85675 |
|
| Tycho2 |
5663-00327-1 |
|
Gaia DR2 |
4166491118945325056 |
|
HD |
158577 |
|
GC |
23703 |
|
| BD |
BD-09 4562 |
|
Distance |
51.49 |
|
Distance ly |
167.96 |
|
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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