02507+5554 WAL 19 AF

02^h 50^m 41.81^s +55° 53' 43.8" P.A. 25.00 sep 57.7 mag 3.76,11.44 Sp M3Ib-IIa dist. 269.54 pc (879.24 l.y.)

Coord 2000	02507+5554		Discov num	WAL 19		Comp	AF		Coord arcsec 2000	02 50 41.81 +55 53 43.8
Date first	1904		Date last	2013		Obs	7
Pa first	29		Pa last	24.8		P.A. Now (θ)	24.8°
Sep first	58.0		Sep last	57.721		Sep. Now (ρ)	57.721"
Mag pri	3.76		Mag sec	11.44		delta mag (ΔM)	7.68		Spectral class	M3Ib-IIa (red)
Pri motion ra	+016		Sec motion ra	+000
Pri motion dec	-014		Sec motion dec	-004
Notes	N (See Notes)

rPM=0.887

This double is not physical.

02507+5554 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Miram	23655	02 50 42 +55 53 44	STF 307 AB	2018	58	301	28.7	3.76	8.50	4.74
Show		23655	02 50 42 +55 53 44	STF 307 AC	2014	14	269	64.0	3.76	11.61	7.85
Show		23655	02 50 42 +55 53 44	SHJ 34 AE	2012	8	297	242.9	3.76	9.24	5.48
Show		23655	02 50 42 +55 53 44	WAL 19 AF	2013	7	25	57.7	3.76	11.44	7.68		<===
Show			02 50 34 +55 53 44	WRD 1 CD	2015	14	116	5.2	11.61	12.70	1.09
Show			02 50 34 +55 53 44	FYM 161 CG	2015	6	229	15.8	11.61	14.00	2.39

Septuple system
7 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Common name	Miram		Constellation	Perseus		SAO	23655		HIP	13268
Tycho2	3704-01332-1		Gaia DR2	454491381980370304		HD	17506		HR	834
GC	3390		ADS	2157		BD	BD+55 714		Bayer	Eta Persei
Bayer name	Eta Per		Flamsteed	15 Persei		Flamsteed name	15 Per		FK5	99
Distance	269.54		Distance ly	879.24		Bayer greek	η Per