20391+1329 UC 4242AB

Coord 2000	20391+1329		Discov num	UC 4242		Comp	AB		Coord arcsec 2000	20 39 07.13 +13 29 01.8
Date first	1998		Date last	2015		Obs	6
Pa first	105		Pa last	105		P.A. Now (θ)	105°
Sep first	45.1		Sep last	45.3		Sep. Now (ρ)	45.3"
Mag pri	9.90		Mag sec	15.40		delta mag (ΔM)	5.5		Spectral class
Pri motion ra	+074		Sec motion ra	+071
Pri motion dec	+056		Sec motion dec	+055
Notes	V (Proper motion indicates physical)

rPM=0.034 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 39 07 +13 29 02	TDT 2453 Aa,Ab	1991	1	117	0.5	10.49	10.94	0.45
Show			20 39 07 +13 29 02	UC 4242 AB	2015	6	105	45.3	9.90	15.40	5.50		<===

Triple system
2 visible stars in this system

Precise pa	105		Precise sep	45.25		Constellation	Delphinus		Tycho2	1100-01675-1
Gaia DR2	1756085752220246016

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20391+1329	UC 4242	AB	2000	2	105	45.3	9.90	15.40		V	203907.13+132901.8
20391+1329	UC 4242	AB	2001	2	105	45.1	9.90	15.40		V	203907.13+132901.8
20391+1329	UC 4242	AB	2015	3	105	45.4	9.90	15.40		V	203907.13+132901.8

If you need more information about this double, apply for a data request form to the WDS.