13535-3540 HWE 28 AB (HD 120987)
13h 53m 32.75s -35° 39' 51.2" P.A. 317.00 sep 1.0 mag 6.27,6.38 Sp F4V dist. 52.27 pc (170.5 l.y.)
| Coord 2000 |
13535-3540 |
|
Discov num |
HWE 28 |
|
Comp |
AB |
|
Coord arcsec 2000 |
13 53 32.75 -35 39 51.2 |
|
| Date first |
1876 |
|
Date last |
2021 |
|
Obs |
84 |
|
| Pa first |
270 |
|
Pa last |
317.1 |
|
P.A. Now (θ) |
317.4° |
|
| Sep first |
0.8 |
|
Sep last |
1.008 |
|
Sep. Now (ρ) |
1.007" |
|
| Mag pri |
6.27 |
|
Mag sec |
6.38 |
|
delta mag (ΔM) |
0.11 |
|
Spectral class |
F4V (yellow-white) |
|
| Pri motion ra |
-086 |
|
Sec motion ra |
-086 |
|
| Pri motion dec |
-021 |
|
Sec motion dec |
-021 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
13535-3540 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 120987 |
204955 |
13 53 33 -35 39 51 |
HWE 28 AB |
2021 |
84 |
317 |
1.0 |
6.27 |
6.38 |
0.11 |
Y |
<=== |
| Show |
|
204955 |
13 53 33 -35 39 51 |
BU 1108 AC |
2016 |
14 |
150 |
28.2 |
6.27 |
12.30 |
6.03 |
|
|
| Show |
|
204955 |
13 53 33 -35 39 51 |
I 1618 AD |
2016 |
5 |
130 |
37.9 |
6.27 |
14.80 |
8.53 |
|
|
| Show |
|
204955 |
13 53 33 -35 39 51 |
H 5 124 AE |
2019 |
19 |
7 |
68.2 |
6.27 |
8.65 |
2.38 |
|
|
Quintuple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 120987 |
|
Constellation |
Centaurus |
|
SAO |
204955 |
|
HIP |
67819 |
|
| Tycho2 |
7291-01975-1 |
|
Gaia DR2 |
6121891150715463296 |
|
HD |
120987 |
|
HR |
5222 |
|
| GC |
18761 |
|
CD |
CD-35 9090 |
|
CP |
CP-35 6008 |
|
Distance |
52.27 |
|
| Distance ly |
170.5 |
|
ORBITAL ELEMENTS
| Period (P) | 362.9985y | ± 15.368 |
Periastron (T) | 1958.5214y | ± 0.2243 |
Semi-major axis (a) | 1.4886a | ± 0.04375 |
| Eccentricity (e) | 0.76736 | ± 0.01353 |
Inclination (i) | 74.536° | ± 0.668 |
Longitude of periastron (ω) | 89.984° | ± 0.571 |
| Node (Ω) | 113.094° | ± 0.644 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2014 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
308.9 |
0.988 |
| 2001 |
309.3 |
0.992 |
| 2002 |
309.7 |
0.995 |
| 2003 |
310.1 |
0.998 |
| 2004 |
310.4 |
1.000 |
| 2005 |
310.8 |
1.002 |
| 2006 |
311.2 |
1.004 |
| 2007 |
311.5 |
1.006 |
| 2008 |
311.9 |
1.007 |
| 2009 |
312.3 |
1.009 |
| 2010 |
312.7 |
1.010 |
| 2011 |
313.0 |
1.011 |
| 2012 |
313.4 |
1.011 |
| 2013 |
313.8 |
1.012 |
| 2014 |
314.1 |
1.012 |
| 2015 |
314.5 |
1.012 |
| 2016 |
314.9 |
1.012 |
| 2017 |
315.2 |
1.012 |
| 2018 |
315.6 |
1.011 |
| 2019 |
316.0 |
1.010 |
| 2020 |
316.3 |
1.010 |
| 2021 |
316.7 |
1.009 |
| 2022 |
317.1 |
1.008 |
| 2023 |
317.4 |
1.007 |
| 2024 |
317.8 |
1.005 |
| 2025 |
318.2 |
1.004 |
| 2026 |
318.6 |
1.003 |
| 2027 |
318.9 |
1.001 |
| 2028 |
319.3 |
0.999 |
| 2029 |
319.7 |
0.997 |
| 2030 |
320.1 |
0.995 |
|
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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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