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19508+6400
STI 931

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

19508+6400 STI 931

19^h 50^m 52.01^s +64° 00' 46.7" P.A. 19.00 sep 15.9 mag 10.73,14.16

Coord 2000	19508+6400		Discov num	STI 931		Comp			Coord arcsec 2000	19 50 52.01 +64 00 46.7
Date first	1903		Date last	2015		Obs	8
Pa first	17		Pa last	19		P.A. Now (θ)	19°
Sep first	14.7		Sep last	15.9		Sep. Now (ρ)	15.9"
Mag pri	10.73		Mag sec	14.16		delta mag (ΔM)	3.43		Spectral class
Pri motion ra	-004		Sec motion ra	+001
Pri motion dec	-013		Sec motion dec	-007
Notes

rPM=0.574

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	18.6		Precise sep	15.909		Constellation	Draco		Tycho2	4239-00516-1
Gaia DR2	2241566319664213376

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19508+6400	STI 931		1999	2	19	15.8	10.73	13.30		D	195052.01+640046.7
19508+6400	STI 931		2003	3	19	15.8	10.73	13.30		D	195052.01+640046.7
19508+6400	STI 931		2010	4	19	15.5	10.73	14.16			195052.01+640046.7
19508+6400	STI 931		2015	8	19	15.9	10.73	14.16			195052.01+640046.7

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