19551+3012 WAL 121AD

Coord 2000	19551+3012		Discov num	WAL 121		Comp	AD		Coord arcsec 2000	19 55 06.50 +30 11 41.6
Date first	1944		Date last	2015		Obs	5
Pa first	160		Pa last	145		P.A. Now (θ)	145°
Sep first	50.0		Sep last	54.8		Sep. Now (ρ)	54.8"
Mag pri	6.63		Mag sec	12.21		delta mag (ΔM)	5.58		Spectral class	B6V (blue-white)
Pri motion ra	+003		Sec motion ra	-004
Pri motion dec	-004		Sec motion dec	-005
Notes

rPM=1.104 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		69079	19 55 06 +30 11 42	STT 390 AB	2015	33	22	9.6	6.63	9.50	2.87
Show		69079	19 55 06 +30 11 42	STT 390 AC	2015	17	176	15.8	6.63	11.23	4.60
Show		69079	19 55 06 +30 11 42	WAL 121 AD	2015	5	145	54.8	6.63	12.21	5.58		<===

Quadruple system
4 visible stars in this system

Precise pa	144.5		Precise sep	54.75		Constellation	Cygnus		SAO	69079
HIP	98017		Tycho2	2669-05015-1		Gaia DR2	2030389993316732288		HD	188651
HR	7607		BD	BD+29 3802		Distance	262.47		Distance ly	856.18

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19551+3012	WAL 121	AD	1998	2	160	50.3	6.63	12.21	B6V	D	195506.50+301141.6
19551+3012	WAL 121	AD	2013	3	145	55.3	6.63	12.21	B6V		195506.50+301141.6
19551+3012	WAL 121	AD	2015	4	145	54.8	6.63	12.21	B6V		195506.50+301141.6

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