20171+6410 STI 961

Coord 2000	20171+6410		Discov num	STI 961		Comp			Coord arcsec 2000	20 17 11.60 +64 09 59.6
Date first	1903		Date last	2015		Obs	9
Pa first	152		Pa last	179		P.A. Now (θ)	179°
Sep first	4.7		Sep last	6.7		Sep. Now (ρ)	6.7"
Mag pri	11.50		Mag sec	11.60		delta mag (ΔM)	0.1		Spectral class
Pri motion ra	+018		Sec motion ra	+010
Pri motion dec	+029		Sec motion dec	-033
Notes	L (Linear solution)

Visually invisible, K-band or other infrared star rPM=1.813 This double is not physical.

Precise pa

179.4

Precise sep

6.663

Constellation

Draco

Gaia DR2

71991834880

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20171+6410	STI 961		1903	1	152	4.7	10.41	11.00			201711.61+640956.4
20171+6410	STI 961		2010	2	178	6.6	10.41	11.00			201711.61+640956.4
20171+6410	STI 961		2015	5	179	6.7	11.50	11.60			201711.60+640959.6

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