16044-1122 STF 1998 AB (Xi Sco)
16h 04m 22.13s -11° 22' 23.2" P.A. 12.00 sep 1.2 mag 4.84,4.86 Sp F5IV+F5IV
| Coord 2000 |
16044-1122 |
|
Discov num |
STF1998 |
|
Comp |
AB |
|
Coord arcsec 2000 |
16 04 22.13 -11 22 23.2 |
|
| Date first |
1825 |
|
Date last |
2020 |
|
Obs |
630 |
|
| Pa first |
356 |
|
Pa last |
11.9 |
|
P.A. Now (θ) |
16° |
|
| Sep first |
1.2 |
|
Sep last |
1.153 |
|
Sep. Now (ρ) |
1.122" |
|
| Mag pri |
4.84 |
|
Mag sec |
4.86 |
|
delta mag (ΔM) |
0.02 |
|
Spectral class |
F5IV+F5IV (yellow-white/yellow-white) |
|
| Pri motion ra |
-074 |
|
Sec motion ra |
-042 |
|
| Pri motion dec |
-033 |
|
Sec motion dec |
-019 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.431
This double is physical.
16044-1122 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
Xi Sco |
159665 |
16 04 22 -11 22 23 |
STF 1998 AB |
2020 |
630 |
12 |
1.2 |
4.84 |
4.86 |
0.02 |
Y |
<=== |
| Show |
|
159665 |
16 04 22 -11 22 23 |
STF 1998 AC |
2019 |
389 |
45 |
7.2 |
4.84 |
7.30 |
2.46 |
Y |
|
| Show |
|
159665 |
16 04 22 -11 22 20 |
STF 1998 BC |
2019 |
79 |
38 |
8.8 |
4.86 |
7.30 |
2.44 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
Xi Sco |
|
Constellation |
Scorpius |
|
SAO |
159665 |
|
HIP |
78727 |
|
| Tycho2 |
5619-01257-1 |
|
Gaia DR2 |
4343066192367555200 |
|
HD |
144069 |
|
HR |
5977 |
|
| GC |
21593 |
|
ADS |
9909 |
|
BD |
BD-10 4237 |
|
Bayer |
Xi Librae |
|
| Bayer name |
Xi Lib |
|
Flamsteed |
51 Librae |
|
Flamsteed name |
51 Lib |
|
Bayer greek |
ξ Lib |
|
Bayer or Flamsteed indentifiers not always match the correct constellation because of procession and proper motion of the star. (Lib vs Sco)
ORBITAL ELEMENTS
| Period (P) | 45.9y | ± 0.6 |
Periastron (T) | 1997.22y | ± 0.02 |
Semi-major axis (a) | 0.654a | ± 0.006 |
| Eccentricity (e) | 0.744 | ± 0.001 |
Inclination (i) | 34.5° | ± 1 |
Longitude of periastron (ω) | 163.8° | ± 5 |
| Node (Ω) | 25.3° | ± 4 |
Notes | n | |
Reference | Doc2009g | |
| Equinox | 2000 | |
Last observation | 2006 | |
Grade | 1 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
300.7 |
0.326 |
| 2001 |
314.6 |
0.406 |
| 2002 |
324.0 |
0.483 |
| 2003 |
330.8 |
0.555 |
| 2004 |
336.2 |
0.622 |
| 2005 |
340.5 |
0.684 |
| 2006 |
344.1 |
0.741 |
| 2007 |
347.3 |
0.793 |
| 2008 |
350.0 |
0.841 |
| 2009 |
352.5 |
0.885 |
| 2010 |
354.8 |
0.924 |
| 2011 |
356.9 |
0.960 |
| 2012 |
358.8 |
0.992 |
| 2013 |
0.6 |
1.021 |
| 2014 |
2.3 |
1.046 |
| 2015 |
4.0 |
1.067 |
| 2016 |
5.6 |
1.086 |
| 2017 |
7.1 |
1.100 |
| 2018 |
8.6 |
1.112 |
| 2019 |
10.1 |
1.121 |
| 2020 |
11.6 |
1.126 |
| 2021 |
13.0 |
1.128 |
| 2022 |
14.5 |
1.126 |
| 2023 |
16.0 |
1.122 |
| 2024 |
17.4 |
1.114 |
| 2025 |
18.9 |
1.102 |
| 2026 |
20.5 |
1.087 |
| 2027 |
22.1 |
1.069 |
| 2028 |
23.7 |
1.046 |
| 2029 |
25.5 |
1.020 |
| 2030 |
27.3 |
0.990 |
|
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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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