00220+4213 HJ 1021

Coord 2000	00220+4213		Discov num	HJ 1021		Comp			Coord arcsec 2000	00 21 57.78 +42 12 34.8
Date first	1828		Date last	2015		Obs	17
Pa first	247		Pa last	247		P.A. Now (θ)	247°
Sep first	4.0		Sep last	6.0		Sep. Now (ρ)	6"
Mag pri	9.68		Mag sec	10.10		delta mag (ΔM)	0.42		Spectral class	A2 (white)
Pri motion ra	+009		Sec motion ra	+009
Pri motion dec	-003		Sec motion dec	-006
Notes

rPM=0.277 (< 0.3, Physical double) This double is physical.

Precise pa	247.1		Precise sep	6.016		Constellation	Andromeda		SAO	36300
Tycho2	2791-02276-1		Gaia DR2	3834444672

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
00220+4213	HJ 1021		2001	8	246	6.1	9.68	10.10	A2	D	002157.78+421234.8
00220+4213	HJ 1021		2002	10	246	6.2	9.68	10.10	A2	D	002157.78+421234.8
00220+4213	HJ 1021		2015	12	247	6.0	9.68	10.10	A2		002157.78+421234.8

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