08250-4246 RST 4888 AB (V438 Pup)

Coord 2000	08250-4246		Discov num	RST4888		Comp	AB		Coord arcsec 2000	08 24 57.22 -42 46 11.5
Date first	1942		Date last	2020		Obs	27
Pa first	136		Pa last	101.5		P.A. Now (θ)	101.5°
Sep first	0.4		Sep last	0.524		Sep. Now (ρ)	0.524"
Mag pri	6.59		Mag sec	6.81		delta mag (ΔM)	0.22		Spectral class	B3V (blue-white)
Pri motion ra	-010		Sec motion ra	-010
Pri motion dec	+005		Sec motion dec	+005
Notes	N (See Notes)

Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	V438 Pup	219890	08 24 57 -42 46 12	RST 4888 AB	2020	27	102	0.5	6.59	6.81	0.22		<===
Show		219890	08 24 57 -42 46 12	CHR 226 Ba,Bb	2020	13	103	0.0	7.00	8.10	1.10

Triple system
2 estimated visually detectable stars in this system

Var name	V438 Pup		Constellation	Puppis		SAO	219890		HIP	41250
Tycho2	7669-03731-1		HD	71302		HR	3322		GC	11504
CD	CD-42 4219		CP	CP-42 2455		Distance	549.45		Distance ly	1792.31

discov_num	notes	refcode
CHR 226	Ba,Bb: This close companion to RST4888 has been observed on three
	occasions, but has shown little movement over a 1.6-year period. The
	1989 measurements of the Rossiter pair were originally published by
	McAlister et al. (1990) and Hartkopf et al. (1993). Following	McA1990
	discovery of the close pair in the 1990 data, these 1989 data were	Hrt1993
	rereduced, resulting in "preconfirmation" of the new component.	Hrt1996b
	V438 Pup, Algol-type eclipsing binary, P = 4.9350 d.	Zas2011
	The new pair was initially given component designations Aa,Ab, but
	it was uncertain which component of the Rossiter had been split.
	Tokovinin et al. (2015) have determined it was the B component, so the	Tok2015c
	pair has been changed to Ba,Bb.

refcode	metd	author	reference
Hrt1993	Sc j	Hartkopf, W.I., Mason, B.D., Barry, D.J., McAlister, H.A., Bagnuolo, W.G., &	1993AJ....106..352H
Hrt1993		Prieto, C.M.
Hrt1993		AJ 106, 352, 1993
Hrt1996b	Sc j	Hartkopf, W.I., Mason, B.D., McAlister, H.A., Turner, N.H., Barry, D.J., Franz, .	1996AJ....111..936H
Hrt1996b		O.G., & Prieto, C.M
Hrt1996b		AJ 111, 936, 1996
McA1990	Sc j	McAlister, H.A., Hartkopf, & Franz, O.G.	1990AJ.....99..965M
McA1990		AJ 99, 965, 1990
Tok2015c	orb+j	Tokovinin, A., Mason, B.D., Hartkopf, W.I., Mendez, R.A., & Horch, E.P.	2015AJ....150...50T
Tok2015c	+St	AJ 150, 50, 2015 (some measures corrected in Tok2017b)	2017AJ....154..110T
Zas2011	-	Zasche, P.	...................
Zas2011		private communication, 2011

idgroup	discov	author
1	CHR	Center for High Ang. Res. Astronomy (speckle interferometry systems)
3	RST	Rossiter, R.A.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
08250-4246	RST4888	AB	2006	8	105	0.5	6.59	6.81		D	082457.22-424611.5
08250-4246	RST4888	AB	2009	10	104	0.5	6.59	6.81		D	082457.22-424611.5
08250-4246	RST4888	AB	2010	11	105	0.5	6.59	6.81		N D	082457.22-424611.5
08250-4246	RST4888	AB	2011	13	104	0.5	6.59	6.81		N D	082457.22-424611.5
08250-4246	RST4888	AB	2012	14	103	0.5	6.59	6.81	B3V	N	082457.22-424611.5
08250-4246	RST4888	AB	2014	16	102	0.5	6.59	6.81	B3V	N	082457.22-424611.5
08250-4246	RST4888	AB	2015	18	103	0.5	6.59	6.81	B3V	N	082457.22-424611.5
08250-4246	RST4888	AB	2017	20	103	0.5	6.59	6.81	B3V	N	082457.22-424611.5
08250-4246	RST4888	AB	2018	23	102	0.5	6.59	6.81	B3V	N	082457.22-424611.5
08250-4246	RST4888	AB	2019	26	102	0.5	6.59	6.81	B3V	N	082457.22-424611.5
08250-4246	RST4888	AB	2020	27	102	0.5	6.59	6.81	B3V	N	082457.22-424611.5

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