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Doubles in session

Current system

20186+1100
STF2662

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

20186+1100 STF2662

20^h 18^m 33.25^s +10° 59' 31.5" P.A. 42.00 sep 2.0 mag 8.69,10.30 Sp A3

Coord 2000	20186+1100		Discov num	STF2662		Comp			Coord arcsec 2000	20 18 33.25 +10 59 31.5
Date first	1831		Date last	2018		Obs	26
Pa first	39		Pa last	42		P.A. Now (θ)	42°
Sep first	1.7		Sep last	2.0		Sep. Now (ρ)	2"
Mag pri	8.69		Mag sec	10.30		delta mag (ΔM)	1.61		Spectral class	A3 (white)
Pri motion ra	-007		Sec motion ra	-007
Pri motion dec	-017		Sec motion dec	-017
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	42.4		Precise sep	1.961		Constellation	Delphinus		SAO	105943
Tycho2	1078-01351-1		Gaia DR2	1801695148105115904		HD	193162

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20186+1100	STF2662		2001	22	39	1.8	8.69	10.30	A3		201833.25+105931.5
20186+1100	STF2662		2007	23	37	1.8	8.69	10.30	A3		201833.25+105931.5
20186+1100	STF2662		2015	24	42	1.9	8.69	10.30	A3		201833.25+105931.5
20186+1100	STF2662		2018	25	42	2.0	8.69	10.30	A3		201833.25+105931.5

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