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Doubles in session

Current system

20102+0204
HJ 2933

Selections

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Binary Systems
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Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20102+0204 HJ 2933

20^h 10^m 09.78^s +02° 03' 34.7" P.A. 27.00 sep 21.7 mag 10.67,11.67 Sp A5

Coord 2000	20102+0204		Discov num	HJ 2933		Comp			Coord arcsec 2000	20 10 09.78 +02 03 34.7
Date first	1830		Date last	2016		Obs	20
Pa first	28		Pa last	27		P.A. Now (θ)	27°
Sep first	15.0		Sep last	21.7		Sep. Now (ρ)	21.7"
Mag pri	10.67		Mag sec	11.67		delta mag (ΔM)	1		Spectral class	A5 (white)
Pri motion ra	+015		Sec motion ra	+015
Pri motion dec	+005		Sec motion dec	+001
Notes

rPM=0.253 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	27		Precise sep	21.714		Constellation	Aquila		Tycho2	0499-00020-1
Gaia DR2	4243632987887118848

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20102+0204	HJ 2933		2000	9	27	21.7	10.67	11.92	A5	D	201009.78+020334.7
20102+0204	HJ 2933		2002	11	27	21.4	10.67	11.92	A5	D	201009.78+020334.7
20102+0204	HJ 2933		2010	13	26	21.8	10.67	11.67	A5		201009.78+020334.7
20102+0204	HJ 2933		2016	14	27	21.7	10.67	11.67	A5		201009.78+020334.7

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