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Current system

21197+4228
ES 1583 AB

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

21197+4228 ES 1583 AB

21^h 19^m 41.17^s +42° 28' 37.2" P.A. 238.00 sep 13.0 mag 11.14,11.32 Sp A2Vb

Coord 2000	21197+4228		Discov num	ES 1583		Comp	AB		Coord arcsec 2000	21 19 41.17 +42 28 37.2
Date first	1895		Date last	2015		Obs	12
Pa first	240		Pa last	237.9		P.A. Now (θ)	237.9°
Sep first	13.6		Sep last	13.046		Sep. Now (ρ)	13.046"
Mag pri	11.14		Mag sec	11.32		delta mag (ΔM)	0.18		Spectral class	A2Vb (white)
Pri motion ra	+002		Sec motion ra	+005
Pri motion dec	+001		Sec motion dec	-001
Notes	U (Proper motion indicates non-physical)

rPM=0.707

This double is not physical.

21197+4228 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			21 19 41 +42 28 37	ES 1583 AB	2015	12	238	13.0	11.14	11.32	0.18		<===
Show			21 19 41 +42 28 37	ES 1583 AC	2015	10	223	7.6	11.14	11.99	0.85
Show			21 19 41 +42 28 37	ABH 144 AD	2015	7	112	64.4	11.14	11.49	0.35
Show			21 19 41 +42 28 37	ABH 144 AE	2015	7	219	27.2	11.10	14.30	3.20
Show			21 19 41 +42 28 37	ABH 144 AF	2015	7	245	62.8	11.14	14.84	3.70
Show			21 19 41 +42 28 37	ABH 144 AG	2015	7	238	82.9	11.14	15.32	4.18
Show			21 19 41 +42 28 37	ABH 144 AH	2015	7	22	41.7	11.14	15.09	3.95
Show			21 19 41 +42 28 37	ABH 144 AI	2015	7	117	69.6	11.10	15.50	4.40
Show			21 19 41 +42 28 37	ABH 144 AJ	2014	6	112	81.2	11.14	15.61	4.47
Show			21 19 41 +42 28 37	ABH 144 AK	2015	7	98	101.4	11.14	15.20	4.06
Show			21 19 40 +42 28 30	ES 1583 BC	2016	12	77	6.0	11.30	11.90	0.60

11-fold system
11 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Tycho2

3177-03032-1

Gaia DR2

1968914958140533760

ADS

14867