13044-1316 HU  642AB

 
 
13h 04m 26.98s -13 15' 45.8" P.A. 220.60 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
Coord arcsec 2000
13 04 26.98 -13 15 45.8
Date first
1900
Date last
2019
Obs
32
Pa first
203
Pa last
41
P.A. Now (θ)
220.6°
Sep first
0.3
Sep last
0.5
Sep. Now (ρ)
0.5"
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
Notes
O (Orbital solution)
Visually invisible, K-band or other infrared star This double is physical.
 
 
13044-1316 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 157698 13044-1316 HU 642 AB 1900 2019 32 221 0.5 10.66 10.41 0.25 Y <===
Show 157698 13044-1316 HU 642 AC 2015 2019 3 17 1.6 10.66 14.20 3.54
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
40.9
Precise sep
0.504
Constellation
Virgo
SAO
157698
HIP
63789
Tycho2
5542-00477-1
ADS
8762
BD
BD-12 3747
Distance
132.28
Distance ly
431.5
last precise pa
40.9
last precise sep
0.504
 
 
ORBITAL ELEMENTS
 
 
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 Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2018
label rho theta
2000 0.482 226.7
2001 0.484 226.4
2002 0.486 226.1
2003 0.488 225.8
2004 0.490 225.5
2005 0.492 225.2
2006 0.493 224.9
2007 0.494 224.6
2008 0.496 224.3
2009 0.497 224.1
2010 0.498 223.8
2011 0.499 223.5
2012 0.500 223.2
2013 0.501 222.9
2014 0.501 222.6
2015 0.502 222.3
2016 0.502 222.0
2017 0.503 221.8
2018 0.503 221.5
2019 0.503 221.2
2020 0.503 220.9
2021 0.503 220.6
2022 0.503 220.3
2023 0.503 220.0
2024 0.503 219.8
2025 0.502 219.5
2026 0.502 219.2
2027 0.501 218.9
2028 0.501 218.6
2029 0.500 218.3
2030 0.499 218.0

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
 
grafico orbita






wds13044-1316c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
13044-1316 HU 642 AB 2018 31 41 0.5 10.66 10.41 G0 O 130426.98-131545.8
13044-1316 HU 642 AB 2019 32 41 0.5 10.66 10.41 G0 O 130426.98-131545.8

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