20556+4004 TDT 2634

20^h 55^m 37.16^s +40° 04' 08.8" P.A. 54.00 sep 1.9 mag 11.73,12.37

Coord 2000	20556+4004	Discov num	TDT2634	Comp		Coord arcsec 2000	20 55 37.16 +40 04 08.8
Date first	1991	Date last	2016	Obs	2
Pa first	187	Pa last	53.5	P.A. Now (θ)	53.5°
Sep first	0.9	Sep last	1.889	Sep. Now (ρ)	1.889"
Mag pri	11.73	Mag sec	12.37	delta mag (ΔM)	0.64	Spectral class
Pri motion ra	+008	Sec motion ra	+008
Pri motion dec	+007	Sec motion dec	+007
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Tycho2

3171-01556-1

Gaia DR2

1873291806261818496

WDS 20556+4004 TDT 2634 : NOTES

No records found.

REFERENCES

No records found.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20556+4004	TDT2634		1991	1	187	0.9	11.73	12.37			205537.16+400408.8
20556+4004	TDT2634		2016	2	54	1.9	11.73	12.37			205537.16+400408.8

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WDS 20556+4004 TDT 2634 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20556+4004 TDT 2634 : MEASURES

No records found.

WDS 20556+4004 : VIRTUAL EYEPIECE

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WDS 20556+4004 : ALADIN DSS IMAGE @ 20^h 55^m 37.16^s +40° 04' 08.8"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20556+4004 TDT 2634 : 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		20556+4004	TDT2634		54	1.9
Show		20558+3951	LDS2469		2	3.3	14
Show		20553+3944	SEI1315		281	29.0	21
Show		20555+3940	MLB 783		288	5.6	24
Show		20551+3941	MLB 886		141	7.0	24
Show		20577+3943	COU2429		209	0.8	28
Show		20599+4016	HDS2989	Da,Db	143	0.1	31
Show		20599+4016	RAO 72	DE	118	19.8	31
Show		20545+3937	BRT2281		73	3.6	31
Show		20555+3932	BKO 472		67	5.7	33
Show		20549+3933	BKO 471		171	5.5	33
Show		20566+3932	SEI1325		140	27.8	34
Show		20547+3929	GRV 395		211	59.7	36
Show		20550+3929	SEI1311		247	8.8	36
Show		20588+3957	TDT2670		6	0.5	38
Show		20544+3929	BKO 469		328	4.7	38
Show		20531+3940	SEI1292		205	24.8	39
Show		20546+4042	ES 1685	AB	73	24.2	39
Show		20546+4042	ES 1685	BC	74	2.8	39
Show		20526+4024	GRV 391		144	59.5	40
Show		20520+4009	MLB 955		27	6.6	41
Show		20544+4042	STT 420		2	5.8	41
Show		20587+3942	BKO 477		8	7.6	42
Show		20591+3950	BKO 479		9	12.4	43
Show		20559+3922	MLB 957		134	2.8	43
Show		20590+3945	SEI1349		160	27.9	44
Show		20559+3921	MLB 958		169	5.3	44
Show		20592+3946	BKO 481		204	11.5	45
Show		20569+3922	SEI1326		14	26.6	45
Show		20591+3944	BKO 480		236	11.1	45
Show		20577+3926	SEI1334		106	16.9	46
Show		20592+3941	SEI1351	AB	256	17.5	47
Show		20592+3941	TOB 206	AC	71	38.4	47
Show		20571+3920	BKO 473		34	5.4	47
Show		20572+3920	BKO 474		24	3.3	48
Show		20596+3953	SEI1358		273	30.9	48
Show		20581+4043	COU2430	AB	254	0.4	48
Show		20581+4043	COU2430	AB,C	176	3.0	48
Show		20599+4016	BUP 221	BC	107	203.7	49
Show		20578+3923	BKO 475		265	5.5	49
Show		20552+3915	MLB 782	AB	344	10.3	50
Show		20552+3915	SEI1313	AC	260	26.9	50
Show		20550+3914	ES 1983		266	6.1	50
Show		20589+3931	SEI1348		295	26.4	51
Show		20599+4016	COU2431	Aa,Ab	205	2.2	51
Show		20599+4016	ENG 79	AB	219	165.9	51
Show		20599+4016	LEP 98	AD	258	999.9	51
Show		20599+4016	BUP 221	AC	154	210.3	51
Show		20599+4016	LSC 1	Aa1,2	257	0.0	51
Show		20546+3914	BKO 470	BC	280	2.9	52
Show		20546+3914	MLB 780	AB	64	9.6	52

WDS 20556+4004 : COMPONENTS

	A
B	pa=46.0° sep=1.62"

20556+4004 A

Componente originario normalizzato	AB		Coord arcsec 2000	205537.16+400408.8		Mag	11.73		PmRA	8.00
PmDE	7.0		Tycho2	3171-01556-1

Tycho2

Tycho2	3171-01556-1	Pflag		RAmdeg	313.90481442	DEmdeg	40.06902033
PmRA	8.2	PmDE	6.8	E RAmdeg	52	E DEmdeg	47
E pmRA	1.8	E pmDE	1.7	EpRAm	1981.74	EpDEm	1982.82
Num	4	Q RAmdeg	1.2	Q DEmdeg	1.0	Q pmRA	1.2
Q pmDE	1.1	BTmag	11.837	E BTmag	0.078	VTmag	11.353
E VTmag	0.085	Prox	999	TYC	T	HIP
CCDM		RAdeg	313.90478750	DEdeg	40.06900333	EpRA 1990	1.57
EpDE 1990	1.67	E RAdeg	55.2	E DEdeg	48.7	Posflg
Corr	0.0

20556+4004 B

Componente originario normalizzato	AB		Coord arcsec 2000	205537.26+400409.9		Mag	12.37		PmRA	8.00
PmDE	7.0		Calc delta mag	0.64		Calc coord	yes