15557-2645 I 977 (HD 142456)
15h 55m 41.93s -26° 44' 49.3" P.A. 264.00 sep 0.6 mag 7.99,8.48 Sp F7V dist. 75.53 pc (246.38 l.y.)
Coord 2000 |
15557-2645 |
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Discov num |
I 977 |
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Comp |
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Coord arcsec 2000 |
15 55 41.93 -26 44 49.3 |
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Date first |
1910 |
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Date last |
2021 |
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Obs |
44 |
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Pa first |
20 |
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Pa last |
264.1 |
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P.A. Now (θ) |
264.1° |
|
Sep first |
0.4 |
|
Sep last |
0.628 |
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Sep. Now (ρ) |
0.628" |
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Mag pri |
7.99 |
|
Mag sec |
8.48 |
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delta mag (ΔM) |
0.49 |
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Spectral class |
F7V (yellow-white) |
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Pri motion ra |
-016 |
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Sec motion ra |
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Pri motion dec |
-075 |
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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 142456 |
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Constellation |
Scorpius |
|
SAO |
183933 |
|
HIP |
78002 |
|
Tycho2 |
6787-00658-1 |
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Gaia DR2 |
6235266089630115456 |
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HD |
142456 |
|
GC |
21374 |
|
ADS |
9836 |
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CD |
CD-2611106 |
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CP |
CP-26 5545 |
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Distance |
75.53 |
|
Distance ly |
246.38 |
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ORBITAL ELEMENTS SOLUTION #1
Period (P) | 274.5y | |
Periastron (T) | 1968.88y | |
Semi-major axis (a) | 0.754a | |
Eccentricity (e) | 0.364 | |
Inclination (i) | 65.8° | |
Longitude of periastron (ω) | 29.7° | |
Node (Ω) | 102.9° | |
Notes | n | |
Reference | Sca2013d | |
Equinox | 2000 | |
Last observation | 2010 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
232.2 |
0.307 |
2001 |
235.1 |
0.320 |
2002 |
237.8 |
0.334 |
2003 |
240.2 |
0.349 |
2004 |
242.4 |
0.363 |
2005 |
244.5 |
0.378 |
2006 |
246.4 |
0.393 |
2007 |
248.2 |
0.408 |
2008 |
249.9 |
0.423 |
2009 |
251.4 |
0.438 |
2010 |
252.8 |
0.453 |
2011 |
254.2 |
0.468 |
2012 |
255.4 |
0.483 |
2013 |
256.6 |
0.497 |
2014 |
257.7 |
0.512 |
2015 |
258.8 |
0.527 |
2016 |
259.8 |
0.541 |
2017 |
260.7 |
0.555 |
2018 |
261.6 |
0.569 |
2019 |
262.5 |
0.583 |
2020 |
263.3 |
0.596 |
2021 |
264.1 |
0.610 |
2022 |
264.9 |
0.623 |
2023 |
265.6 |
0.636 |
2024 |
266.3 |
0.649 |
2025 |
266.9 |
0.661 |
2026 |
267.6 |
0.673 |
2027 |
268.2 |
0.685 |
2028 |
268.8 |
0.697 |
2029 |
269.4 |
0.709 |
2030 |
269.9 |
0.720 |
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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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ORBITAL ELEMENTS SOLUTION #2
Period (P) | 816.6y | |
Periastron (T) | 1967.58y | |
Semi-major axis (a) | 1.616a | |
Eccentricity (e) | 0.706 | |
Inclination (i) | 69.7° | |
Longitude of periastron (ω) | 20.4° | |
Node (Ω) | 107.5° | |
Notes | n | |
Reference | Sca2013d | |
Equinox | 2000 | |
Last observation | 2010 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
232.9 |
0.310 |
2001 |
235.7 |
0.325 |
2002 |
238.3 |
0.340 |
2003 |
240.6 |
0.356 |
2004 |
242.8 |
0.372 |
2005 |
244.7 |
0.388 |
2006 |
246.5 |
0.405 |
2007 |
248.2 |
0.422 |
2008 |
249.7 |
0.439 |
2009 |
251.1 |
0.456 |
2010 |
252.4 |
0.473 |
2011 |
253.6 |
0.490 |
2012 |
254.8 |
0.508 |
2013 |
255.8 |
0.525 |
2014 |
256.8 |
0.542 |
2015 |
257.8 |
0.559 |
2016 |
258.7 |
0.576 |
2017 |
259.5 |
0.594 |
2018 |
260.3 |
0.611 |
2019 |
261.0 |
0.628 |
2020 |
261.7 |
0.645 |
2021 |
262.4 |
0.662 |
2022 |
263.0 |
0.678 |
2023 |
263.6 |
0.695 |
2024 |
264.2 |
0.712 |
2025 |
264.7 |
0.728 |
2026 |
265.2 |
0.745 |
2027 |
265.7 |
0.761 |
2028 |
266.2 |
0.778 |
2029 |
266.7 |
0.794 |
2030 |
267.1 |
0.810 |
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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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