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17388+7644
LDS1873

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

17388+7644 LDS1873

17^h 38^m 44.39^s +76° 45' 12.7" P.A. 325.00 sep 29.6 mag 11.63,15.20

Coord 2000	17388+7644		Discov num	LDS1873		Comp			Coord arcsec 2000	17 38 44.39 +76 45 12.7
Date first	1966		Date last	2015		Obs	11
Pa first	323		Pa last	325		P.A. Now (θ)	325°
Sep first	30.0		Sep last	29.6		Sep. Now (ρ)	29.6"
Mag pri	11.63		Mag sec	15.20		delta mag (ΔM)	3.57		Spectral class
Pri motion ra	-007		Sec motion ra	-011
Pri motion dec	+198		Sec motion dec	+191
Notes

rPM=0.041 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	325.1		Precise sep	29.609		Constellation	Draco		Tycho2	4569-00317-1
Gaia DR2	1656901866292295040

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
17388+7644	LDS1873		1999	2	325	29.6	12.21	15.50		D	173844.39+764512.7
17388+7644	LDS1873		2004	3	325	29.7	12.21	15.50		D	173844.39+764512.7
17388+7644	LDS1873		2010	4	325	29.7	11.63	15.20			173844.39+764512.7
17388+7644	LDS1873		2015	6	325	29.6	11.63	15.20			173844.39+764512.7

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