13044-1316 HU 642 AB
13h 04m 26.98s -13° 15' 45.8" P.A. 41.00 sep 0.5 mag 10.66,10.41 Sp G0 dist. 132.28 pc (431.5 l.y.)
Coord 2000 |
13044-1316 |
|
Discov num |
HU 642 |
|
Comp |
AB |
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Coord arcsec 2000 |
13 04 26.98 -13 15 45.8 |
|
Date first |
1900 |
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Date last |
2019 |
|
Obs |
36 |
|
Pa first |
203 |
|
Pa last |
40.9 |
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P.A. Now (θ) |
40.9° |
|
Sep first |
0.3 |
|
Sep last |
0.504 |
|
Sep. Now (ρ) |
0.504" |
|
Mag pri |
10.66 |
|
Mag sec |
10.41 |
|
delta mag (ΔM) |
0.25 |
|
Spectral class |
G0 (yellow) |
|
Pri motion ra |
-053 |
|
Sec motion ra |
|
|
Pri motion dec |
-011 |
|
Sec motion dec |
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Notes |
O
(Orbital solution) |
|
This double is physical.
13044-1316 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
|
13 04 27 -13 15 46 |
HU 642 AB |
2019 |
36 |
41 |
0.5 |
10.66 |
10.41 |
0.25 |
Y |
<=== |
Show |
|
|
13 04 27 -13 15 46 |
HU 642 AC |
2019 |
3 |
17 |
1.6 |
10.66 |
14.20 |
3.54 |
|
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Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Virgo |
|
HIP |
63789 |
|
Tycho2 |
5542-00477-1 |
|
ADS |
8762 |
|
BD |
BD-12 3747 |
|
Distance |
132.28 |
|
Distance ly |
431.5 |
|
SUSPECTED ORBITAL ELEMENTS
Identifier | 13044-1316 HU 642 |
coord_arcsec_2000 | 130426.98-131545.8 |
Period (P) | 660y | ± 80 |
Periastron (T) | 1955y | ± 2 |
Semi-major axis (a) | 0.705a | ± 0.048 |
Eccentricity (e) | 0.408 | ± 0.057 |
Inclination (i) | 106.9° | ± 1 |
Longitude of periastron (ω) | 124.8° | ± 2.2 |
Node (Ω) | 47.5° | ± 1 |
Notes | | |
Reference | Doc2018l | |
Equinox | 2000 | |
Last observation | 2018 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
226.7 |
0.482 |
2001 |
226.4 |
0.484 |
2002 |
226.1 |
0.486 |
2003 |
225.8 |
0.488 |
2004 |
225.5 |
0.490 |
2005 |
225.2 |
0.492 |
2006 |
224.9 |
0.493 |
2007 |
224.6 |
0.494 |
2008 |
224.3 |
0.496 |
2009 |
224.1 |
0.497 |
2010 |
223.8 |
0.498 |
2011 |
223.5 |
0.499 |
2012 |
223.2 |
0.500 |
2013 |
222.9 |
0.501 |
2014 |
222.6 |
0.501 |
2015 |
222.3 |
0.502 |
2016 |
222.0 |
0.502 |
2017 |
221.8 |
0.503 |
2018 |
221.5 |
0.503 |
2019 |
221.2 |
0.503 |
2020 |
220.9 |
0.503 |
2021 |
220.6 |
0.503 |
2022 |
220.3 |
0.503 |
2023 |
220.0 |
0.503 |
2024 |
219.8 |
0.503 |
2025 |
219.5 |
0.502 |
2026 |
219.2 |
0.502 |
2027 |
218.9 |
0.501 |
2028 |
218.6 |
0.501 |
2029 |
218.3 |
0.500 |
2030 |
218.0 |
0.499 |
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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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