14493-1409 BU 106 AB (Mu Lib)

14^h 49^m 19.09^s -14° 08' 56.3" P.A. 7.00 sep 1.9 mag 5.61,6.62 Sp A1pSrCrEu dist. 72.94 pc (237.93 l.y.)

Coord 2000	14493-1409		Discov num	BU 106		Comp	AB		Coord arcsec 2000	14 49 19.09 -14 08 56.3
Date first	1873		Date last	2019		Obs	111
Pa first	340		Pa last	7.3		P.A. Now (θ)	7.3°
Sep first	1.3		Sep last	1.939		Sep. Now (ρ)	1.939"
Mag pri	5.61		Mag sec	6.62		delta mag (ΔM)	1.01		Spectral class	A1pSrCrEu (white)
Pri motion ra	-065		Sec motion ra	-059
Pri motion dec	-014		Sec motion dec	-016
Notes	N O T (See Notes, Orbital solution, Parallax indicates physical)

rPM=0.095 (< 0.3, Physical double)

This double is physical.

14493-1409 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Mu Lib	158821	14 49 19 -14 08 56	BU 106 AB	2019	111	7	1.9	5.61	6.62	1.01	Y	<===
Show		158821	14 49 19 -14 08 56	BU 106 AC	2016	8	295	12.3	5.61	14.70	9.09
Show		158821	14 49 19 -14 08 56	BU 106 AD	2016	9	165	25.0	5.61	14.10	8.49
Show		158821	14 49 19 -14 08 56	BU 106 AE	2016	12	232	26.6	5.61	12.60	6.99

Quintuple system
5 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	Mu Lib		Var name	NSV6816 Lib		Constellation	Libra		SAO	158821
HIP	72489		Tycho2	5590-00994-1		Gaia DR2	6311246118378830080		HD	130559
HR	5523		GC	19938		ADS	9396		BD	BD-13 3986
Bayer	Mu Librae		Bayer name	Mu Lib		Flamsteed	7 Librae		Flamsteed name	7 Lib
Distance	72.94		Distance ly	237.93		Bayer greek	μ Lib

ORBITAL ELEMENTS

Period (P)	614y		Periastron (T)	1655y		Semi-major axis (a)	1.587a
Eccentricity (e)	0.65		Inclination (i)	52.9°		Longitude of periastron (ω)	116.5°
Node (Ω)	46.5°		Notes	n		Reference	Zir2015a
Equinox	2000		Last observation	2008		Grade	4	(1=Definitive, 9=Indet.)

label	theta	rho
2000	3.4	1.921
2001	3.5	1.923
2002	3.7	1.925
2003	3.9	1.926
2004	4.1	1.928
2005	4.3	1.930
2006	4.4	1.931
2007	4.6	1.933
2008	4.8	1.935
2009	5.0	1.936
2010	5.2	1.938
2011	5.4	1.939
2012	5.5	1.941
2013	5.7	1.942
2014	5.9	1.944
2015	6.1	1.945
2016	6.2	1.947
2017	6.4	1.948
2018	6.6	1.949
2019	6.8	1.951
2020	7.0	1.952
2021	7.1	1.953
2022	7.3	1.954
2023	7.5	1.956
2024	7.7	1.957
2025	7.8	1.958
2026	8.0	1.959
2027	8.2	1.960
2028	8.4	1.961
2029	8.6	1.962
2030	8.7	1.963

grafico orbita

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

wds14493-1409a.png orbit plot

Measures: green=micrometric, blue=interferometric, purple=photographic