18190-4759 B 936 (HD 167732)

18^h 18^m 58.15^s -47° 59' 21.5" P.A. 163.00 sep 0.4 mag 9.71,10.08 Sp G8/K0V dist. 60.53 pc (197.45 l.y.)

Coord 2000	18190-4759		Discov num	B 936		Comp			Coord arcsec 2000	18 18 58.15 -47 59 21.5
Date first	1927		Date last	2018		Obs	13
Pa first	170		Pa last	162.8		P.A. Now (θ)	160.3°
Sep first	0.3		Sep last	0.401		Sep. Now (ρ)	0.461"
Mag pri	9.71		Mag sec	10.08		delta mag (ΔM)	0.37		Spectral class	G8/K0V (yellow)
Pri motion ra	+028		Sec motion ra
Pri motion dec	+003		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 167732		Constellation	Telescopium		SAO	228897		HIP	89752
Tycho2	8362-00203-1		Gaia DR2	6706756810431580160		HD	167732		CD	CD-4812408
CP	CP-48 9733		Distance	60.53		Distance ly	197.45

ORBITAL ELEMENTS

Period (P)	87.24y		Periastron (T)	2003.09y		Semi-major axis (a)	0.384a
Eccentricity (e)	0.561		Inclination (i)	103.4°		Longitude of periastron (ω)	226.9°
Node (Ω)	162.1°		Notes	n		Reference	Tok2018b
Equinox	2000		Last observation	2015		Grade	3	(1=Definitive, 9=Indet.)

label	theta	rho
2000	342.8	0.193
2001	339.4	0.177
2002	335.1	0.153
2003	328.9	0.122
2004	317.8	0.086
2005	290.9	0.052
2006	234.2	0.046
2007	199.0	0.076
2008	185.5	0.115
2009	178.9	0.153
2010	174.9	0.190
2011	172.2	0.224
2012	170.1	0.256
2013	168.6	0.285
2014	167.2	0.311
2015	166.1	0.336
2016	165.2	0.358
2017	164.3	0.377
2018	163.5	0.395
2019	162.8	0.412
2020	162.1	0.426
2021	161.5	0.439
2022	160.9	0.451
2023	160.3	0.461
2024	159.8	0.470
2025	159.3	0.477
2026	158.8	0.484
2027	158.3	0.489
2028	157.8	0.493
2029	157.3	0.496
2030	156.9	0.499

grafico orbita

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

wds18190-4759a.png orbit plot

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