15313-3349 HWE 78 AB,C (HD 138138)
15h 31m 17.22s -33° 49' 11.2" P.A. 118.00 sep 1.4 mag 7.03,9.11 Sp A2/3V dist. 102.77 pc (335.24 l.y.)
| Coord 2000 |
15313-3349 |
|
Discov num |
HWE 78 |
|
Comp |
AB,C |
|
Coord arcsec 2000 |
15 31 17.22 -33 49 11.2 |
|
| Date first |
1876 |
|
Date last |
2018 |
|
Obs |
26 |
|
| Pa first |
160 |
|
Pa last |
118.1 |
|
P.A. Now (θ) |
118.1° |
|
| Sep first |
1.2 |
|
Sep last |
1.447 |
|
Sep. Now (ρ) |
1.447" |
|
| Mag pri |
7.03 |
|
Mag sec |
9.11 |
|
delta mag (ΔM) |
2.08 |
|
Spectral class |
A2/3V (white) |
|
| Pri motion ra |
-028 |
|
Sec motion ra |
-028 |
|
| Pri motion dec |
-030 |
|
Sec motion dec |
-030 |
|
| Notes |
O
V
(Orbital solution, Proper motion indicates physical) |
|
This double is physical.
15313-3349 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
206720 |
15 31 17 -33 49 11 |
B 2036 AB |
2018 |
19 |
1 |
0.4 |
7.70 |
7.90 |
0.20 |
Y |
|
| Show |
HD 138138 |
206720 |
15 31 17 -33 49 11 |
HWE 78 AB,C |
2018 |
26 |
118 |
1.4 |
7.03 |
9.11 |
2.08 |
Y |
<=== |
| Show |
|
206720 |
15 31 17 -33 49 11 |
KOU 38 AD |
2000 |
1 |
128 |
6.6 |
7.60 |
12.85 |
5.25 |
|
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Quadruple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 138138 |
|
Constellation |
Lupus |
|
SAO |
206720 |
|
HIP |
76001 |
|
| Tycho2 |
7322-00836-1 |
|
Gaia DR2 |
6014396640513030144 |
|
HD |
138138 |
|
CD |
CD-3310564 |
|
| CP |
CP-33 3881 |
|
Distance |
102.77 |
|
Distance ly |
335.24 |
|
ORBITAL ELEMENTS
| Period (P) | 1394.4376y | ± 758.9249 |
Periastron (T) | 2090.0061y | ± 227.9176 |
Semi-major axis (a) | 3.99697a | ± 2.29529 |
| Eccentricity (e) | 0.87514 | ± 0.20495 |
Inclination (i) | 109.767° | ± 11.891 |
Longitude of periastron (ω) | 75.307° | ± 28.98 |
| Node (Ω) | 90.72° | ± 67.051 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2014 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
126.2 |
1.491 |
| 2001 |
125.8 |
1.488 |
| 2002 |
125.5 |
1.485 |
| 2003 |
125.2 |
1.481 |
| 2004 |
124.9 |
1.478 |
| 2005 |
124.6 |
1.475 |
| 2006 |
124.3 |
1.472 |
| 2007 |
124.0 |
1.468 |
| 2008 |
123.7 |
1.465 |
| 2009 |
123.4 |
1.461 |
| 2010 |
123.1 |
1.458 |
| 2011 |
122.7 |
1.454 |
| 2012 |
122.4 |
1.451 |
| 2013 |
122.1 |
1.447 |
| 2014 |
121.8 |
1.443 |
| 2015 |
121.4 |
1.439 |
| 2016 |
121.1 |
1.435 |
| 2017 |
120.8 |
1.431 |
| 2018 |
120.5 |
1.427 |
| 2019 |
120.1 |
1.423 |
| 2020 |
119.8 |
1.419 |
| 2021 |
119.5 |
1.415 |
| 2022 |
119.1 |
1.410 |
| 2023 |
118.8 |
1.406 |
| 2024 |
118.4 |
1.401 |
| 2025 |
118.1 |
1.396 |
| 2026 |
117.7 |
1.392 |
| 2027 |
117.4 |
1.387 |
| 2028 |
117.0 |
1.382 |
| 2029 |
116.7 |
1.377 |
| 2030 |
116.3 |
1.371 |
|
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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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