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19561+3457
HLM 34

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

19561+3457 HLM 34

19^h 55^m 43.44^s +34° 55' 41.2" P.A. 12.00 sep 9.9 mag 11.68,13.07

Coord 2000	19561+3457		Discov num	HLM 34		Comp			Coord arcsec 2000	19 55 43.44 +34 55 41.2
Date first	1925		Date last	2015		Obs	12
Pa first	12		Pa last	12		P.A. Now (θ)	12°
Sep first	9.8		Sep last	9.9		Sep. Now (ρ)	9.9"
Mag pri	11.68		Mag sec	13.07		delta mag (ΔM)	1.39		Spectral class
Pri motion ra	-009		Sec motion ra	+001
Pri motion dec	-011		Sec motion dec	-009
Notes

rPM=0.718

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	12.2		Precise sep	9.875		Constellation	Cygnus		SAO	69097
Tycho2	2677-00990-1		Gaia DR2	2059363739587805184

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19561+3457	HLM 34		2006	6	13	10.3	11.68	13.07		D	195543.44+345541.2
19561+3457	HLM 34		2011	8	13	9.8	11.68	13.07			195543.44+345541.2
19561+3457	HLM 34		2015	12	12	9.9	11.68	13.07			195543.44+345541.2

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