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Doubles in session

Current system

20187+3715
SLE 994

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

20187+3715 SLE 994

20^h 18^m 39.50^s +37° 15' 13.7" P.A. 353.00 sep 14.5 mag 12.17,14.34

Coord 2000	20187+3715		Discov num	SLE 994		Comp			Coord arcsec 2000	20 18 39.50 +37 15 13.7
Date first	1985		Date last	2015		Obs	10
Pa first	352		Pa last	353		P.A. Now (θ)	353°
Sep first	14.1		Sep last	14.5		Sep. Now (ρ)	14.5"
Mag pri	12.17		Mag sec	14.34		delta mag (ΔM)	2.17		Spectral class
Pri motion ra	-007		Sec motion ra	+005
Pri motion dec	+002		Sec motion dec	+020
Notes

rPM=1.049

This double is not physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa

353.3

Precise sep

14.542

Constellation

Cygnus

Gaia DR2

2060597803946302336

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20187+3715	SLE 994		1998	2	353	14.4	11.60	12.30		D	201839.36+371521.9
20187+3715	SLE 994		2009	3	354	14.6	11.60	12.30		D	201839.36+371521.9
20187+3715	SLE 994		2010	5	353	14.7	12.17	14.34			201839.50+371513.7
20187+3715	SLE 994		2015	6	353	14.6	12.17	14.34			201839.50+371513.7

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