20172+2415 HDS2893AB

Coord 2000	20172+2415		Discov num	HDS2893		Comp	AB		Coord arcsec 2000	20 17 13.11 +24 15 06.9
Date first	1991		Date last	2009		Obs	3
Pa first	164		Pa last	168		P.A. Now (θ)	168°
Sep first	0.3		Sep last	0.3		Sep. Now (ρ)	0.3"
Mag pri	9.19		Mag sec	11.49		delta mag (ΔM)	2.3		Spectral class
Pri motion ra	-013		Sec motion ra
Pri motion dec	-016		Sec motion dec
Notes

Nature of this double is uncertain.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		88457	20172+2415	HDS2893	AB	1991	2009	3	168	0.3	9.19	11.49	2.30		<===
Show		88457	20172+2415	GRV 326	AC	1894	2015	17	262	34.8	9.19	10.22	1.03

Triple system
3 visible stars in this system

Precise pa	168.4		Precise sep	0.31		Constellation	Vulpecula		SAO	88457
HIP	99998		Tycho2	2155-00725-1		Gaia DR2	40958762240		HD	193013
BD	BD+23 3956		Distance	398.41		Distance ly	1299.61

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20172+2415	HDS2893	AB	1997	2	172	0.2	9.19	11.49			201713.11+241506.9
20172+2415	HDS2893	AB	2009	3	168	0.3	9.19	11.49			201713.11+241506.9

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