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Doubles in this session

Current system

20102+3644
ES 87

Nearby doubles

3' : 20104+3644
SEI 945AB

8' : 20108+3646
SEI 958

10' : 20108+3637
TDT2052

11' : 20110+3642
SEI 962

11' : 20108+3652
SEI 957

11' : 20105+3635
SEI 948

12' : 20094+3651
BNW 2

13' : 20108+3654
SEI 956

14' : 20107+3657
SEI 953

17' : 20098+3629
COU2413

18' : 20115+3639
SEI 974AB

18' : 20094+3630
SEI 928AB

18' : 20091+3657
SEI 921

20' : 20107+3703
STT 399AB

21' : 20117+3654
SLE 957

21' : 20085+3648
SEI 913

21' : 20115+3630
SEI 971AB

21' : 20119+3642
TDT2077

22' : 20111+3626
ALI 414

23' : 20120+3640
SEI 989

23' : 20090+3626
SEI 920

23' : 20095+3623
ALI 409

27' : 20101+3617
SEI 939AB

29' : 20086+3623
TOB 170

29' : 20117+3706
SEI 980

29' : 20116+3621
SEI 976

Selections

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Quadruple Systems

Multiple Systems

Neglected List I

Neglected List II

Herschel, J.F.W.

20102+3644 ES 87

20^h 10^m 11.91^s +36° 44' 04.6" P.A. 298 sep 8.8 mag 9.34,10.39 Sp A0V

Coord 2000	20102+3644		Discov num	ES 87		Comp			Coord arcsec 2000	20 10 11.91 +36 44 04.6
Date first	1896		Date last	2018		Obs	22
Pa first	297		Pa last	298		P.A. Now (θ)	298°
Sep first	9.5		Sep last	8.8		Sep. Now (ρ)	8.8"
Mag pri	9.34		Mag sec	10.39		delta mag (ΔM)	1.05		Spectral class	A0V (white)
Pri motion ra	-005		Sec motion ra	+004
Pri motion dec	+000		Sec motion dec	+000
Notes	N (See Notes)

rPM=1.8

This double is not physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	298.4		Precise sep	8.793		Constellation	Cygnus		SAO	69533
Tycho2	2683-02485-1		Gaia DR2	32374029184		HD	228069

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20102+3644	ES 87		2004	15	298	8.9	9.34	10.39	A0V	D	201011.91+364404.6
20102+3644	ES 87		2010	17	292	9.7	9.34	10.39	A0V		201011.91+364404.6
20102+3644	ES 87		2015	17	298	8.6	9.34	10.39	A0V	N	201011.91+364404.6

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