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Doubles in session

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20300+0655
LDS4845

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

20300+0655 LDS4845

20^h 30^m 03.14^s +06° 54' 57.5" P.A. 27.00 sep 83.4 mag 17.97,18.90

Coord 2000	20300+0655		Discov num	LDS4845		Comp			Coord arcsec 2000	20 30 03.14 +06 54 57.5
Date first	1960		Date last	2015		Obs	3
Pa first	29		Pa last	27		P.A. Now (θ)	27°
Sep first	77.0		Sep last	83.4		Sep. Now (ρ)	83.4"
Mag pri	17.97		Mag sec	18.90		delta mag (ΔM)	0.93		Spectral class
Pri motion ra	+122		Sec motion ra	+132
Pri motion dec	+190		Sec motion dec	+190
Notes

rPM=0.043 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa

26.6

Precise sep

83.408

Constellation

Delphinus

Gaia DR2

1748816983925915776

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20300+0655	LDS4845		2000	2	21	72.9	17.97	18.90		D	203003.14+065457.5
20300+0655	LDS4845		2015	3	27	83.4	17.97	18.90			203003.14+065457.5

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