21423+4616 ES 1275 BD

21^h 42^m 17.05^s +46° 17' 34.3" P.A. 286.00 sep 6.1 mag 12.90,13.10

Coord 2000	21423+4616		Discov num	ES 1275		Comp	BD		Coord arcsec 2000	21 42 17.05 +46 17 34.3
Date first	1913		Date last	2015		Obs	5
Pa first	279		Pa last	285.9		P.A. Now (θ)	285.9°
Sep first	5.2		Sep last	6.131		Sep. Now (ρ)	6.131"
Mag pri	12.90		Mag sec	13.10		delta mag (ΔM)	0.2		Spectral class
Pri motion ra	+004		Sec motion ra	-025
Pri motion dec	-018		Sec motion dec	-015
Notes

rPM=1

This double is not physical.

21423+4616 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			21 42 17 +46 16 23	ES 1275 AB	2013	6	1	72.6	8.62	12.90	4.28
Show			21 42 17 +46 17 34	ES 1275 BC	2015	5	337	4.3	12.90	13.30	0.40
Show			21 42 17 +46 17 34	ES 1275 BD	2015	5	286	6.1	12.90	13.10	0.20		<===

Quadruple system
4 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Gaia DR2

1974255831569797632