20190+2121 J  3074

Coord 2000	20190+2121		Discov num	J  3074		Comp			Coord arcsec 2000	20 18 49.10 +21 22 05.4
Date first	1892		Date last	2015		Obs	14
Pa first	333		Pa last	331		P.A. Now (θ)	331°
Sep first	8.0		Sep last	7.8		Sep. Now (ρ)	7.8"
Mag pri	12.30		Mag sec	12.45		delta mag (ΔM)	0.15		Spectral class
Pri motion ra	+000		Sec motion ra	+000
Pri motion dec	-006		Sec motion dec	-008
Notes	B (Blue magnitudes)

Visually invisible, K-band or other infrared star rPM=0.25 (< 0.3, Physical double) This double is physical.

Precise pa

331.3

Precise sep

7.766

Constellation

Sagitta

Gaia DR2

43967525760

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20190+2121	J 3074		2006	7	330	8.0	12.30	12.45		DB	201849.10+212205.4
20190+2121	J 3074		2010	9	332	7.8	12.30	12.45		B	201849.10+212205.4
20190+2121	J 3074		2015	10	331	7.8	12.30	12.45		B	201849.10+212205.4

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