21108+4249 VKI 40

21^h 10^m 45.49^s +42° 48' 54.5" P.A. 255.00 sep 3.8 mag 12.36,13.10

Coord 2000	21108+4249	Discov num	VKI 40	Comp		Coord arcsec 2000	21 10 45.49 +42 48 54.5
Date first	1977	Date last	2016	Obs	6
Pa first	258	Pa last	255.3	P.A. Now (θ)	255.3°
Sep first	3.7	Sep last	3.76	Sep. Now (ρ)	3.76"
Mag pri	12.36	Mag sec	13.10	delta mag (ΔM)	0.74	Spectral class
Pri motion ra	+006	Sec motion ra
Pri motion dec	-004	Sec motion dec
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Tycho2

3177-02173-1

Gaia DR2

1969885032323522560

WDS 21108+4249 VKI 40 : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
Vki1984	Po -	Vilkki, E.	1984PASP...96..161V
Vki1984		PASP 96, 161, 1984
Vki1988	Po -	Vilkki, E.	1988PASP..100.1540V
Vki1988		PASP 100, 1540, 1988
Vki1989	Po -	Vilkki, E.	1989PASP..101.1132V
Vki1989		PASP 101, 1132, 1989

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21108+4249	VKI 40		1998	2	256	3.7	12.36	13.10		D	211045.49+424854.5
21108+4249	VKI 40		2002	4	256	3.7	12.36	13.10		D	211045.49+424854.5
21108+4249	VKI 40		2016	6	255	3.8	12.36	13.10			211045.49+424854.5

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WDS 21108+4249 VKI 40 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 21108+4249 VKI 40 : MEASURES

No records found.

WDS 21108+4249 : VIRTUAL EYEPIECE

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WDS 21108+4249 : ALADIN DSS IMAGE @ 21^h 10^m 45.49^s +42° 48' 54.5"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 21108+4249 VKI 40 : 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		21108+4249	VKI 40		255	3.8
Show		21104+4253	BRT1144	BC	309	3.3	6
Show		21104+4253	BRT1144	AB	19	2.9	6
Show		21104+4253	BRT1144	AC	341	5.1	6
Show		21105+4300	VKI 39		236	1.3	12
Show		21099+4257	LDS2492		135	21.5	14
Show		21118+4259	STJ 91		271	1.0	16
Show		21115+4233	COU2225		82	2.1	19
Show		21097+4230	GRV 428		142	40.9	22
Show		21086+4312	GRV 423		212	62.4	34
Show		21100+4326	ES 1453		67	5.3	38
Show		21138+4228	LDS2497		110	36.7	39
Show		21069+4256	ES 1580		88	3.8	43
Show		21151+4257	COU2300		263	0.3	49
Show		21133+4208	LDS2496		274	45.8	50
Show		21069+4314	TDT2759		119	0.5	50
Show		21144+4219	ES 1581		50	4.6	50
Show		21062+4249	KPP1022		29	8.2	51
Show		21071+4322	ES 1452		19	2.3	52
Show		21151+4227	COU2228		28	0.5	54
Show		21119+4158	LDS2493		77	60.2	54
Show		21142+4211	COU2226		120	0.3	54
Show		21064+4314	LDS2488		166	2.2	56
Show		21062+4315	DAM1460		284	2.4	57
Show		21112+4346	ES 1454	BC	285	3.2	57
Show		21145+4329	J 610		26	3.3	58
Show		21112+4346	ES 1454	AB	111	66.8	58
Show		21056+4241	TDT2735		95	0.5	58
Show		21092+4152	LDS2491		184	17.0	59
Show		21054+4256	ES 1579		273	4.3	59
Show		21154+4325	LDS2502		172	67.0	62
Show		21160+4313	LDS2503		131	4.0	63
Show		21161+4224	ES 1582		134	3.5	65
Show		21158+4326	TDT2867		305	0.6	67
Show		21155+4205	TDT2861		287	2.4	69
Show		21152+4339	LDS2501		274	11.3	71
Show		21155+4202	HJL1106		183	459.8	71
Show		21103+4359	STF2773	EF	41	10.7	71
Show		21101+4359	HJ 1618	BC	132	2.9	71
Show		21101+4359	HJ 1618	AB	174	21.7	71
Show		21103+4359	STF2773	AB	112	3.3	72
Show		21103+4359	STF2773	AC	64	20.3	72
Show		21103+4359	STF2773	AD	262	29.4	72
Show		21103+4359	STF2773	AE	149	52.2	72
Show		21053+4328	LDS2486		329	78.2	73
Show		21171+4312	A 401		318	0.4	73
Show		21058+4341	BU 679		75	0.7	75
Show		21041+4225	GII 54		246	5.3	78
Show		21040+4225	COU2433		52	0.3	79
Show		21178+4302	A 616		316	2.7	79
Show		21147+4143	POP1231		269	54.6	79

WDS 21108+4249 : COMPONENTS

	A
B	pa=250.3° sep=2.83"

21108+4249 A

Componente originario normalizzato	AB		Coord arcsec 2000	211045.49+424854.5		Mag	12.36		PmRA	6.00
PmDE	-4.0		Tycho2	3177-02173-1

Tycho2

Tycho2	3177-02173-1	Pflag		RAmdeg	317.68957781	DEmdeg	42.81516691
PmRA	3.9	PmDE	-5.3	E RAmdeg	77	E DEmdeg	79
E pmRA	2.0	E pmDE	1.9	EpRAm	1973.79	EpDEm	1968.93
Num	3	Q RAmdeg	2.4	Q DEmdeg	0.8	Q pmRA	2.5
Q pmDE	0.8	BTmag	12.419	E BTmag	0.176	VTmag	12.364
E VTmag	0.203	Prox	999	TYC		HIP
CCDM		RAdeg	317.68956583	DEdeg	42.81517917	EpRA 1990	1.71
EpDE 1990	1.67	E RAdeg	84.9	E DEdeg	90.7	Posflg
Corr	0.0

21108+4249 B

Componente originario normalizzato	AB		Coord arcsec 2000	211045.25+424853.5		Mag	13.1		Calc delta mag	0.74
Calc coord	yes