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20181+1552
CHE 289

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

20181+1552 CHE 289

20^h 18^m 07.22^s +15° 51' 56.0" P.A. 39.00 sep 32.5 mag 11.56,13.34

Coord 2000	20181+1552		Discov num	CHE 289		Comp			Coord arcsec 2000	20 18 07.22 +15 51 56.0
Date first	1910		Date last	2015		Obs	13
Pa first	40		Pa last	39		P.A. Now (θ)	39°
Sep first	33.5		Sep last	32.5		Sep. Now (ρ)	32.5"
Mag pri	11.56		Mag sec	13.34		delta mag (ΔM)	1.78		Spectral class
Pri motion ra	+004		Sec motion ra	-014
Pri motion dec	+002		Sec motion dec	-010
Notes

rPM=1.257

This double is not physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	39		Precise sep	32.534		Constellation	Delphinus		Tycho2	1631-00091-1
Gaia DR2	1808445011332440576

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20181+1552	CHE 289		1998	3	39	32.7	9.76	11.00		D	201807.22+155156.0
20181+1552	CHE 289		2008	4	39	32.7	9.76	11.00		D	201807.22+155156.0
20181+1552	CHE 289		2013	7	40	32.5	11.56	13.34			201807.22+155156.0
20181+1552	CHE 289		2015	9	39	32.5	11.56	13.34			201807.22+155156.0

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