21092+4152 LDS 2491

21^h 09^m 30.00^s +41° 52' 00.0" P.A. 184.00 sep 17.0 mag 16.80,21.30

Coord 2000	21092+4152	Discov num	LDS2491	Comp		Coord arcsec 2000	21 09 30.00 +41 52 00.0
Date first	1954	Date last	1954	Obs	1
Pa first	184	Pa last	184	P.A. Now (θ)	184°
Sep first	17.0	Sep last	17	Sep. Now (ρ)	17"
Mag pri	16.80	Mag sec	21.30	delta mag (ΔM)	4.5	Spectral class
Pri motion ra	+007	Sec motion ra
Pri motion dec	+029	Sec motion dec
Notes	X (Dubious double)

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Coordinate calcolate

Coordinate calculated

yes

WDS 21092+4152 LDS 2491 : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
LDS		Luyten p.m. catalog (from additional DD list)	...................

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21092+4152	LDS2491		1954	1	184	17.0	16.80	21.30		X

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WDS 21092+4152 LDS 2491 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 21092+4152 LDS 2491 : MEASURES

No records found.

WDS 21092+4152 : VIRTUAL EYEPIECE

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WDS 21092+4152 : ALADIN DSS IMAGE @ 21^h 09^m 30.00^s +41° 52' 00.0"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 21092+4152 LDS 2491 : NEIGHBORHOODS

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Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show		21092+4152	LDS2491		184	17.0
Show		21076+4137	BVD 159		49	4.3	27
Show		21119+4158	LDS2493		77	60.2	28
Show		21071+4134	HJ 1613		5	16.4	33
Show		21097+4230	GRV 428		142	40.9	39
Show		21070+4125	BU 988	AB	223	1.2	39
Show		21070+4125	BU 988	AC	5	9.3	39
Show		21115+4115	STT 431	AB	127	2.6	44
Show		21115+4115	STT 431	AC	356	55.4	44
Show		21115+4115	STT 431	BC	354	57.1	44
Show		21133+4208	LDS2496		274	45.8	47
Show		21115+4233	COU2225		82	2.1	48
Show		21121+4123	LDS2494		212	2.0	49
Show		21048+4144	COU2434		189	0.9	54
Show		21142+4211	COU2226		120	0.3	56
Show		21050+4125	COU2298		147	0.9	58
Show		21138+4228	LDS2497		110	36.7	59
Show		21147+4143	POP1231		269	54.6	59
Show		21108+4249	VKI 40		255	3.8	59
Show		21082+4055	AG 414		108	5.3	60
Show		21144+4219	ES 1581		50	4.6	61
Show		21104+4253	BRT1144	BC	309	3.3	62
Show		21104+4253	BRT1144	AB	19	2.9	62
Show		21104+4253	BRT1144	AC	341	5.1	62
Show		21144+4124	LDS2499		320	6.2	62
Show		21039+4138	STTA214	AB	184	57.4	65
Show		21039+4138	STTA214	BC	244	106.3	65
Show		21099+4257	LDS2492		135	21.5	66
Show		21056+4241	TDT2735		95	0.5	66
Show		21155+4202	HJL1106		183	459.8	68
Show		21062+4249	KPP1022		29	8.2	69
Show		21155+4205	TDT2861		287	2.4	69
Show		21041+4225	GII 54		246	5.3	70
Show		21143+4109	STT 432		115	1.3	70
Show		21105+4300	VKI 39		236	1.3	70
Show		21040+4225	COU2433		52	0.3	70
Show		21069+4256	ES 1580		88	3.8	71
Show		21032+4158	COU2432		24	0.8	71
Show		21054+4058	TDT2732		64	0.7	71
Show		21151+4227	COU2228		28	0.5	72
Show		21118+4259	STJ 91		271	1.0	73
Show		21157+4135	POP 170		75	1.4	73
Show		21032+4131	LDS2484		33	8.7	74
Show		21054+4256	ES 1579		273	4.3	79
Show		21044+4057	ROE 44		43	7.2	80
Show		21140+4051	KPP1300		32	9.9	80
Show		21163+4129	ES 1688		147	5.3	80
Show		21161+4224	ES 1582		134	3.5	81
Show		21023+4139	ROE 21		224	9.1	81
Show		21109+4034	ES 255		34	4.6	81
Show		21086+4312	GRV 423		212	62.4	82

WDS 21092+4152 : COMPONENTS

	A
B	pa=183.0° sep=16.98"

21092+4152 A

Componente originario normalizzato	AB		Coord arcsec 2000	210930.00+415200.0		Mag	16.8		PmRA	7.00
PmDE	29.0		Calc coord	yes

21092+4152 B

Componente originario normalizzato	AB		Coord arcsec 2000	210929.92+415143.0		Mag	21.3		Calc delta mag	4.5
Calc coord	yes