01350-2955 DAW  31AB (BB Scl)

Coord 2000	01350-2955		Discov num	DAW  31		Comp	AB		Coord arcsec 2000	01 35 00.96 -29 54 38.0
Date first	1920		Date last	2015		Obs	105
Pa first	273		Pa last	237		P.A. Now (θ)	65.1°
Sep first	0.2		Sep last	0.2		Sep. Now (ρ)	0.13"
Mag pri	7.51		Mag sec	8.94		delta mag (ΔM)	1.43		Spectral class	K1V (yellow-orange)
Pri motion ra	+157		Sec motion ra
Pri motion dec	+115		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	BB Scl		01350-2955	DAW 31	AB	1920	2015	105	65	0.1	7.51	8.94	1.43	Y	<===
Show			01350-2955	BU 1000	AB,C	1881	2015	50	4	1.7	7.20	11.50	4.30	Y
Show			01350-2955	BU 1000	AB,D	1850	2015	16	19	130.8	7.26	8.80	1.54

Quadruple system
5 visible stars in this system

Precise pa	236.7		Precise sep	0.183		Var name	BB Scl		Constellation	Sculptor
SAO	193189		HIP	7372		Gaia DR2	68946212352		HD	9770
GL	Gl 60A		CD	CD-30 529		CP	CP-30 181		Distance	21.63
Distance ly	70.56		last precise pa	236.7		last precise sep	0.183

Period (P)	4.562y	± 0.002	Periastron (T)	1932.6y	± 0.034	Semi-major axis (a)	0.174a	± 0.003
Eccentricity (e)	0.317	± 0.007	Inclination (i)	19.5°	± 2.9	Longitude of periastron (ω)	244.6°	± 9.4
Node (Ω)	224.3°	± 9.9	Note			Grade	1	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2014

label rho theta 2000 0.176 353.5 2001 0.114 102.6 2002 0.178 221.9 2003 0.218 273.7 2004 0.203 320.3 2005 0.148 29.1 2006 0.130 170.4 2007 0.204 247.2 2008 0.217 293.3 2009 0.183 345.3 2010 0.119 82.9 2011 0.169 213.1 2012 0.217 268.1 2013 0.207 314.0 2014 0.157 17.7 2015 0.121 153.4 2016 0.198 240.7 2017 0.218 287.7 2018 0.189 337.7 2019 0.126 65.1 2020 0.158 203.2 2021 0.215 262.4 2022 0.211 307.9 2023 0.165 7.5 2024 0.115 134.2 2025 0.191 233.7 2026 0.219 282.2 2027 0.195 330.5 2028 0.135 49.5 2029 0.147 191.7 2030 0.211 256.6 Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
01350-2955	DAW 31	AB	1999	88	346	0.2	7.51	8.94	K1V	NOD	013500.96-295438.0
01350-2955	DAW 31	AB	2008	95	331	0.2	7.51	8.94	K1V	NOD	013500.96-295438.0
01350-2955	DAW 31	AB	2009	96	41	0.1	7.51	8.94	K1V	NOD	013500.96-295438.0
01350-2955	DAW 31	AB	2011	97	215	0.2	7.51	8.94	K1V	NOD	013500.96-295438.0
01350-2955	DAW 31	AB	2015	103	157	0.1	7.51	8.94	K1V	NO	013500.96-295438.0

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