01493+4754 STF 162 AB (HD 11031)

Coord 2000	01493+4754		Discov num	STF 162		Comp	AB		Coord arcsec 2000	01 49 15.47 +47 53 47.1
Date first	1828		Date last	2020		Obs	178
Pa first	227		Pa last	198.8		P.A. Now (θ)	198.8°
Sep first	2.2		Sep last	1.96		Sep. Now (ρ)	1.96"
Mag pri	6.47		Mag sec	7.22		delta mag (ΔM)	0.75		Spectral class	A3V (white)
Pri motion ra	-017		Sec motion ra	-017
Pri motion dec	-003		Sec motion dec	-003
Notes	N T (See Notes, Parallax indicates physical)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		37536	01 49 15 +47 53 47	CHR 4 Aa,Ab	1994	7	251	0.1	6.47			Y
Show	HD 11031	37536	01 49 15 +47 53 47	STF 162 AB	2020	178	199	2.0	6.47	7.22	0.75		<===
Show		37536	01 49 15 +47 53 47	STF 162 AC	2020	65	178	20.7	6.47	9.24	2.77
Show		37536	01 49 15 +47 53 47	STF 162 AD	2007	11	96	138.7	6.47	10.01	3.54
Show			01 49 15 +47 53 47	STF 162 BC	2018	11	177	19.2	7.22	9.24	2.02

Quintuple system
4 estimated visually detectable stars in this system

Name	HD 11031		Constellation	Perseus		SAO	37536		HIP	8475
Tycho2	3283-02002-1		Gaia DR2	357046923445911040		HD	11031		HR	526
GC	2200		ADS	1438		BD	BD+47 508		Distance	127.55
Distance ly	416.07

discov_num	notes	refcode
CHR 4	Aa,Ab: Although this new component is indicated as Aa,Ab we have not
	firmly established whether it is associated with the A or B component
	of the wide pair.	McA1987b
	B is a spectroscopic binary. The system appears to be quintuple.
STF 162	AB: Rectilinear solutions by Zirm & Rica (2014)	Zir2014b
	and Genet et al. (2015).	GnR2015a
	Despite the linear solution, proper motion and parallax favor a	Grv2020a
	physical connection. Long period and/or high eccentricity possible.

refcode	metd	author	reference
GnR2015a	S j	Genet, R., Zirm, H., Rica, F., Richards, J., Rowe, D., & Gray, D.	2015JDSO...11..200G
GnR2015a	+orb	JDSO 11, 200, 2015
GnR2015a	+lin
Grv2020a	not -	Greaves, J.	.
Grv2020a		private communication, 2020 (14 Mar 2020 email)
McA1987b	Sc j	McAlister, H.A., Hartkopf, W.I., Hutter, D.J., & Franz, O.G.	1987AJ.....93..688M
McA1987b		AJ 93, 688, 1987
Zir2014b	orb -	Zirm, H. & Rica, F.M.	2014IAUDS.183....1Z
Zir2014b	+lin	Inf. Circ. 183, 1, 2014

idgroup	discov	author
1	CHR	Center for High Ang. Res. Astronomy (speckle interferometry systems)
3	STF	Struve, F.G.W.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
01493+4754	STF 162	AB	2007	151	199	1.8	6.47	7.22		D	014915.54+475349.0
01493+4754	STF 162	AB	2008	153	199	1.9	6.47	7.22		D	014915.54+475349.0
01493+4754	STF 162	AB	2010	162	199	1.8	6.47	7.22		N D	014915.54+475349.0
01493+4754	STF 162	AB	2011	164	198	1.9	6.47	7.22		N D	014915.54+475349.0
01493+4754	STF 162	AB	2013	156	198	1.9	6.47	7.22	A3V	NLD	014915.54+475349.0
01493+4754	STF 162	AB	2015	160	200	1.9	6.47	7.22	A3V	NL	014915.54+475349.0
01493+4754	STF 162	AB	2016	168	199	1.9	6.47	7.22	A3V	NL	014915.47+475347.1
01493+4754	STF 162	AB	2018	171	199	2.0	6.47	7.22	A3V	NL	014915.47+475347.1
01493+4754	STF 162	AB	2019	176	198	2.0	6.47	7.22	A3V	NT	014915.47+475347.1
01493+4754	STF 162	AB	2020	178	199	2.0	6.47	7.22	A3V	NT	014915.47+475347.1

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Show	date	username	difficulty	separation	pa_estim	interest	notes
Show	21/12/12	daedalus1	mean difficulty	separated	198		Seeing Pickering 4. Measures: theta 198 degrees, rho 2.12 arc sec.

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