17011-4204 B 1841 (HD 153382)

17^h 01^m 06.06^s -42° 04' 18.3" P.A. 57.00 sep 0.0 mag 7.64,8.84 Sp B8II dist. 540.54 pc (1763.24 l.y.)

Coord 2000	17011-4204		Discov num	B 1841		Comp			Coord arcsec 2000	17 01 06.06 -42 04 18.3
Date first	1931		Date last	2021		Obs	16
Pa first	346		Pa last	56.8		P.A. Now (θ)	56.8°
Sep first	0.2		Sep last	0.041		Sep. Now (ρ)	0.041"
Mag pri	7.64		Mag sec	8.84		delta mag (ΔM)	1.2		Spectral class	B8II (blue-white)
Pri motion ra	+000		Sec motion ra
Pri motion dec	-007		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 153382		Constellation	Scorpius		SAO	227552		HIP	83266
Tycho2	7877-01106-1		Gaia DR2	5966315409356248320		HD	153382		GC	22920
CD	CD-4111171		CP	CP-41 7814		Distance	540.54		Distance ly	1763.24

ORBITAL ELEMENTS

Period (P)	161.26y		Periastron (T)	2045.345y		Semi-major axis (a)	0.151a
Eccentricity (e)	0.597		Inclination (i)	74.9°		Longitude of periastron (ω)	30°
Node (Ω)	165.2°		Notes	n		Reference	Tok2018b
Equinox	2000		Last observation	2017		Grade	4	(1=Definitive, 9=Indet.)

label	theta	rho
2000	7.4	0.120
2001	8.2	0.116
2002	9.0	0.113
2003	9.8	0.109
2004	10.8	0.105
2005	11.8	0.101
2006	12.9	0.097
2007	14.0	0.093
2008	15.3	0.089
2009	16.7	0.085
2010	18.3	0.081
2011	20.0	0.077
2012	21.8	0.073
2013	23.9	0.069
2014	26.3	0.065
2015	29.0	0.061
2016	32.0	0.057
2017	35.4	0.054
2018	39.4	0.050
2019	43.9	0.047
2020	49.1	0.044
2021	55.0	0.041
2022	61.7	0.039
2023	69.1	0.037
2024	77.1	0.036
2025	85.5	0.035
2026	94.0	0.036
2027	102.2	0.036
2028	109.9	0.038
2029	116.9	0.040
2030	123.2	0.042

grafico orbita

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

wds17011-4204a.png orbit plot

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