02308+5533 STF 270AD

Coord 2000	02308+5533		Discov num	STF 270		Comp	AD		Coord arcsec 2000	02 30 50.65 +55 32 54.2
Date first	1902		Date last	2015		Obs	10
Pa first	268		Pa last	281		P.A. Now (θ)	281°
Sep first	42.5		Sep last	51.1		Sep. Now (ρ)	51.1"
Mag pri	7.00		Mag sec	14.20		delta mag (ΔM)	7.2		Spectral class	F4V (yellow-white)
Pri motion ra	+083		Sec motion ra	+006
Pri motion dec	-097		Sec motion dec	-007
Notes	N (See Notes)

rPM=0.928 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		23389	02 30 51 +55 32 54	STF 270 AB	2016	45	306	21.3	7.00	9.66	2.66
Show		23389	02 30 51 +55 32 54	STF 270 AC	2015	13	333	48.0	7.00	11.37	4.37
Show		23389	02 30 51 +55 32 54	STF 270 AD	2015	10	281	51.1	7.00	14.20	7.20		<===
Show		23389	02 30 49 +55 33 06	STF 270 BD	2015	7	265	32.8	9.66	14.20	4.54
Show		23389	02 30 49 +55 33 06	RAO 42 BE	2015	7	208	16.0	9.66	14.70	5.04

Quintuple system
5 visible stars in this system

Precise pa	280.6		Precise sep	51.059		Constellation	Perseus		SAO	23389
HIP	11696		Tycho2	3691-00669-1		Gaia DR2	457326850673147264		HD	15407
BD	BD+54 561		Distance	54.7		Distance ly	178.43

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
02308+5533	STF 270	AD	1927	2	272	42.4	7.00	12.50	F4V	D	023050.57+553255.1
02308+5533	STF 270	AD	1999	5	280	49.6	7.00	12.50	F4V	N D	023050.57+553255.1
02308+5533	STF 270	AD	2013	7	281	51.0	7.00	14.20	F4V	N	023050.57+553255.1
02308+5533	STF 270	AD	2015	8	281	51.1	7.00	14.20	F4V	N	023050.65+553254.2

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