15197-2416 HJ 4756 (HD 136121)
15h 19m 40.37s -24° 16' 11.9" P.A. 247.00 sep 0.6 mag 7.90,8.27 Sp F4V dist. 69.64 pc (227.17 l.y.)
| Coord 2000 |
15197-2416 |
|
Discov num |
HJ 4756 |
|
Comp |
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Coord arcsec 2000 |
15 19 40.37 -24 16 11.9 |
|
| Date first |
1835 |
|
Date last |
2016 |
|
Obs |
39 |
|
| Pa first |
0 |
|
Pa last |
246.7 |
|
P.A. Now (θ) |
246.7° |
|
| Sep first |
0.7 |
|
Sep last |
0.58 |
|
Sep. Now (ρ) |
0.58" |
|
| Mag pri |
7.90 |
|
Mag sec |
8.27 |
|
delta mag (ΔM) |
0.37 |
|
Spectral class |
F4V (yellow-white) |
|
| Pri motion ra |
-046 |
|
Sec motion ra |
-046 |
|
| Pri motion dec |
-023 |
|
Sec motion dec |
-023 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 136121 |
|
Constellation |
Libra |
|
SAO |
183377 |
|
HIP |
75012 |
|
| Tycho2 |
6762-01032-1 |
|
Gaia DR2 |
6227062221054093824 |
|
HD |
136121 |
|
GC |
20589 |
|
| ADS |
9586 |
|
CD |
CD-2312208 |
|
CP |
CP-23 6146 |
|
Distance |
69.64 |
|
| Distance ly |
227.17 |
|
ORBITAL ELEMENTS
| Period (P) | 541.6y | |
Periastron (T) | 1825.04y | |
Semi-major axis (a) | 1.196a | |
| Eccentricity (e) | 0.221 | |
Inclination (i) | 117.1° | |
Longitude of periastron (ω) | 127.2° | |
| Node (Ω) | 150.9° | |
Notes | | |
Reference | Zir2008 | |
| Equinox | 2000 | |
Last observation | 1992 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
255.3 |
0.632 |
| 2001 |
254.3 |
0.631 |
| 2002 |
253.2 |
0.630 |
| 2003 |
252.1 |
0.629 |
| 2004 |
251.1 |
0.628 |
| 2005 |
250.0 |
0.627 |
| 2006 |
248.9 |
0.627 |
| 2007 |
247.8 |
0.627 |
| 2008 |
246.8 |
0.627 |
| 2009 |
245.7 |
0.627 |
| 2010 |
244.6 |
0.627 |
| 2011 |
243.5 |
0.627 |
| 2012 |
242.5 |
0.628 |
| 2013 |
241.4 |
0.629 |
| 2014 |
240.3 |
0.629 |
| 2015 |
239.3 |
0.630 |
| 2016 |
238.2 |
0.632 |
| 2017 |
237.1 |
0.633 |
| 2018 |
236.1 |
0.635 |
| 2019 |
235.0 |
0.636 |
| 2020 |
234.0 |
0.638 |
| 2021 |
233.0 |
0.640 |
| 2022 |
231.9 |
0.642 |
| 2023 |
230.9 |
0.644 |
| 2024 |
229.9 |
0.647 |
| 2025 |
228.9 |
0.649 |
| 2026 |
227.9 |
0.652 |
| 2027 |
226.9 |
0.655 |
| 2028 |
225.9 |
0.658 |
| 2029 |
225.0 |
0.661 |
| 2030 |
224.0 |
0.665 |
|
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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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