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20184+4033
ARN 49

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

20184+4033 ARN 49

20^h 18^m 24.24^s +40° 32' 32.8" P.A. 313.00 sep 30.2 mag 9.59,10.36 Sp K2

Coord 2000	20184+4033		Discov num	ARN 49		Comp			Coord arcsec 2000	20 18 24.24 +40 32 32.8
Date first	1892		Date last	2015		Obs	16
Pa first	314		Pa last	313		P.A. Now (θ)	313°
Sep first	31.6		Sep last	30.2		Sep. Now (ρ)	30.2"
Mag pri	9.59		Mag sec	10.36		delta mag (ΔM)	0.77		Spectral class	K2 (yellow-orange)
Pri motion ra	+008		Sec motion ra	+015
Pri motion dec	+016		Sec motion dec	+008
Notes

rPM=0.594

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	313.2		Precise sep	30.152		Constellation	Cygnus		SAO	49446
Tycho2	3155-00379-1		Gaia DR2	2062342312268666624		HD	228846

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20184+4033	ARN 49		2003	9	313	30.6	9.59	10.36		D	201824.24+403232.8
20184+4033	ARN 49		2010	11	313	30.2	9.59	10.36	K2		201824.24+403232.8
20184+4033	ARN 49		2015	12	313	30.2	9.59	10.36	K2		201824.24+403232.8

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