15405-1842 HDS 2211 AB (HD 139751)
15h 40m 28.43s -18° 41' 44.8" P.A. 26.00 sep 0.6 mag 10.52,11.85 Sp K3/K4V dist. 40.19 pc (131.1 l.y.)
| Coord 2000 |
15405-1842 |
|
Discov num |
HDS2211 |
|
Comp |
AB |
|
Coord arcsec 2000 |
15 40 28.43 -18 41 44.8 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
7 |
|
| Pa first |
66 |
|
Pa last |
25.8 |
|
P.A. Now (θ) |
25.8° |
|
| Sep first |
0.9 |
|
Sep last |
0.632 |
|
Sep. Now (ρ) |
0.632" |
|
| Mag pri |
10.52 |
|
Mag sec |
11.85 |
|
delta mag (ΔM) |
1.33 |
|
Spectral class |
K3/K4V (yellow-orange) |
|
| Pri motion ra |
-079 |
|
Sec motion ra |
-070 |
|
| Pri motion dec |
-158 |
|
Sec motion dec |
-157 |
|
| Notes |
O
(Orbital solution) |
|
rPM=0.051 (< 0.3, Physical double)
This double is physical.
15405-1842 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 139751 |
|
15 40 28 -18 41 45 |
HDS 2211 AB |
2021 |
7 |
26 |
0.6 |
10.52 |
11.85 |
1.33 |
Y |
<=== |
| Show |
|
|
15 40 28 -18 41 45 |
CVN 53 AC |
2005 |
1 |
103 |
8.9 |
6.95 |
17.70 |
10.75 |
|
|
| Show |
|
|
15 40 28 -18 41 45 |
CVN 53 AD |
2005 |
1 |
224 |
11.6 |
6.95 |
17.90 |
10.95 |
|
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Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 139751 |
|
Constellation |
Libra |
|
HIP |
76768 |
|
Tycho2 |
6189-00024-1 |
|
| Gaia DR2 |
6254299662396908288 |
|
HD |
139751 |
|
BD |
BD-18 4125 |
|
Distance |
40.19 |
|
| Distance ly |
131.1 |
|
ORBITAL ELEMENTS
| Period (P) | 79.5y | ± 2.3 |
Periastron (T) | 2042.6y | ± 1.1 |
Semi-major axis (a) | 0.592a | ± 0.015 |
| Eccentricity (e) | 0.679 | ± 0.023 |
Inclination (i) | 136.6° | ± 3.2 |
Longitude of periastron (ω) | 49.3° | ± 4 |
| Node (Ω) | 272.8° | ± 3.5 |
Notes | | |
Reference | Hor2021b | |
| Equinox | | |
Last observation | | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
55.9 |
0.861 |
| 2001 |
54.8 |
0.857 |
| 2002 |
53.6 |
0.853 |
| 2003 |
52.4 |
0.848 |
| 2004 |
51.2 |
0.842 |
| 2005 |
50.0 |
0.835 |
| 2006 |
48.8 |
0.827 |
| 2007 |
47.6 |
0.819 |
| 2008 |
46.3 |
0.810 |
| 2009 |
45.0 |
0.800 |
| 2010 |
43.6 |
0.790 |
| 2011 |
42.3 |
0.779 |
| 2012 |
40.9 |
0.767 |
| 2013 |
39.4 |
0.755 |
| 2014 |
37.9 |
0.742 |
| 2015 |
36.3 |
0.728 |
| 2016 |
34.7 |
0.714 |
| 2017 |
33.0 |
0.699 |
| 2018 |
31.2 |
0.683 |
| 2019 |
29.4 |
0.667 |
| 2020 |
27.4 |
0.651 |
| 2021 |
25.4 |
0.634 |
| 2022 |
23.2 |
0.616 |
| 2023 |
20.9 |
0.598 |
| 2024 |
18.4 |
0.579 |
| 2025 |
15.8 |
0.560 |
| 2026 |
13.0 |
0.541 |
| 2027 |
10.0 |
0.521 |
| 2028 |
6.8 |
0.501 |
| 2029 |
3.3 |
0.480 |
| 2030 |
359.4 |
0.460 |
|
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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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