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Doubles in session

Current system

19558+3604
HU 1306

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

19558+3604 HU 1306

19^h 55^m 46.46^s +36° 04' 10.4" P.A. 212.00 sep 0.4 mag 10.16,10.13 Sp F5

Coord 2000	19558+3604		Discov num	HU 1306		Comp			Coord arcsec 2000	19 55 46.46 +36 04 10.4
Date first	1905		Date last	2015		Obs	15
Pa first	183		Pa last	212		P.A. Now (θ)	212°
Sep first	0.5		Sep last	0.4		Sep. Now (ρ)	0.4"
Mag pri	10.16		Mag sec	10.13		delta mag (ΔM)	0.03		Spectral class	F5 (yellow-white)
Pri motion ra	+011		Sec motion ra	+011
Pri motion dec	-030		Sec motion dec	-030
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	212.4		Precise sep	0.39		Constellation	Cygnus		SAO	69098
Tycho2	2681-00894-1		Gaia DR2	2059672083888318592		HD	226602

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19558+3604	HU 1306		1992	13	226	0.4	10.16	10.13	F5		195546.46+360410.4
19558+3604	HU 1306		2008	14	209	0.6	10.16	10.13	F5		195546.46+360410.4
19558+3604	HU 1306		2015	15	212	0.4	10.16	10.13	F5		195546.46+360410.4

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