20491+3640 SEI 1260

20^h 49^m 03.83^s +36° 40' 40.3" P.A. 42.00 sep 7.5 mag 11.16,10.90

Coord 2000	20491+3640	Discov num	SEI1260	Comp		Coord arcsec 2000	20 49 03.83 +36 40 40.3
Date first	1896	Date last	2015	Obs	10
Pa first	44	Pa last	42.4	P.A. Now (θ)	42.4°
Sep first	8.5	Sep last	7.472	Sep. Now (ρ)	7.472"
Mag pri	11.16	Mag sec	10.90	delta mag (ΔM)	0.26	Spectral class
Pri motion ra	-007	Sec motion ra	-010
Pri motion dec	-015	Sec motion dec	-011
Notes	N (See Notes)

rPM=0.302

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Tycho2

2699-01891-1

Gaia DR2

1870792581981215232

WDS 20491+3640 SEI 1260 : NOTES

discov_num	notes	refcode
SEI1260	ALI 428.

REFERENCES

refcode	metd	author	reference
Sei1908	Pa -	Scheiner, J.	1908POPot..59.....S
Sei1908	+Po	Pub. Obs. Potsdam 20, #59, 1908
Sei1913A	Pa -	Scheiner, J.	1913QB811.B8.......
Sei1913A		cited by Burnham (Carnegie Inst. Wash. #168, 1913)
Sei1932A	Pa -	Scheiner, J.	1932QB821.A43......
Sei1932A		cited in ADS (Aitken Double Star Cat.), 1932

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20491+3640	SEI1260		1933	3	43	8.6	11.20	11.60		N	204903.70+364026.0
20491+3640	SEI1260		1998	4	43	7.7	11.16	10.90		N D	204903.83+364040.3
20491+3640	SEI1260		2002	5	43	7.6	11.16	10.90		N D	204903.83+364040.3
20491+3640	SEI1260		2010	6	43	7.1	11.16	10.90		N	204903.83+364040.3
20491+3640	SEI1260		2015	7	42	7.5	11.16	10.90		N	204903.83+364040.3

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

WDS 20491+3640 SEI 1260 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20491+3640 SEI 1260 : MEASURES

No records found.

WDS 20491+3640 : VIRTUAL EYEPIECE

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WDS 20491+3640 : ALADIN DSS IMAGE @ 20^h 49^m 03.83^s +36° 40' 40.3"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20491+3640 SEI 1260 : 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		20491+3640	SEI1260		42	7.5
Show		20500+3640	TOB 199		109	18.8	12
Show		20502+3642	SEI1270		211	23.1	14
Show		20503+3645	TDT2568		174	2.4	16
Show		20505+3635	SEI1271	AB	27	14.9	18
Show		20505+3635	SEI1272	AC	185	20.4	18
Show		20508+3641	SEI1276		266	22.6	22
Show		20490+3619	COU1811		255	0.8	22
Show		20474+3629	FYM 126	CD	112	9.4	22
Show		20474+3629	FYM 126	CE	207	40.1	22
Show		20474+3629	MCA 63	Aa,Ab	46	0.1	23
Show		20474+3629	STT 413	AB	1	0.9	23
Show		20474+3629	S 765	AC	106	82.8	23
Show		20474+3629	FYM 126	AF	119	52.0	23
Show		20512+3650	SEI1280		5	3.8	28
Show		20468+3648	STJ 73		231	0.9	29
Show		20503+3615	TDT2569		55	0.4	30
Show		20506+3615	SEI1274		243	33.5	32
Show		20485+3608	SEI1253		83	24.1	33
Show		20463+3646	COU2220	Aa,Ab	299	0.7	35
Show		20463+3646	ES 2515	AB	175	6.8	35
Show		20501+3714	SEI1268	AB	123	27.3	36
Show		20501+3714	CLL 15	AC	20	48.5	36
Show		20462+3628	TDT2528		4	1.9	37
Show		20521+3645	ES 250		88	4.4	38
Show		20461+3653	ES 2514		100	2.9	39
Show		20521+3657	SEI1285		301	27.6	40
Show		20457+3647	AG 265		207	6.8	41
Show		20510+3717	SEI1277		32	8.1	43
Show		20458+3658	CRB 6		154	10.9	44
Show		20454+3651	SEI1238		123	8.1	45
Show		20526+3655	A 1435		6	0.5	45
Show		20528+3646	COU2221		30	0.3	46
Show		20515+3717	SEI1282		270	27.4	47
Show		20481+3554	SEI1252		115	17.3	48
Show		20455+3706	FIO 1		319	4.9	50
Show		20450+3651	ES 2513		275	6.4	51
Show		20485+3550	SEI1254		20	22.3	51
Show		20533+3639	SEI1293		53	14.2	51
Show		20458+3715	TDT2522		89	0.5	52
Show		20506+3552	SEI1273		159	24.1	52
Show		20494+3548	SEI1262		301	6.1	53
Show		20472+3730	J 1210		247	3.9	54
Show		20535+3645	SEI1296		278	10.5	54
Show		20460+3601	SEI1242		214	23.6	55
Show		20468+3730	ALI 674		328	13.0	57
Show		20524+3724	SEI1287		353	6.7	58
Show		20531+3610	SEI1291		103	9.0	59
Show		20465+3550	ES 2196		70	5.6	59
Show		20460+3554	TDT2525		70	0.6	60
Show		20528+3602	TDT2598		227	0.5	60

WDS 20491+3640 : COMPONENTS

	A
B	pa=36.2° sep=6.84"

20491+3640 A

Componente originario normalizzato	AB		Coord arcsec 2000	204903.83+364040.3		Mag	11.16		PmRA	-7.00
PmDE	-15.0		Tycho2	2699-01891-1

Tycho2

Tycho2	2699-01891-1	Pflag		RAmdeg	312.26595902	DEmdeg	36.67788849
PmRA	-3.8	PmDE	-16.0	E RAmdeg	42	E DEmdeg	39
E pmRA	2.2	E pmDE	2.1	EpRAm	1986.46	EpDEm	1987.00
Num	4	Q RAmdeg	0.5	Q DEmdeg	0.8	Q pmRA	0.5
Q pmDE	0.8	BTmag	11.592	E BTmag	0.062	VTmag	11.160
E VTmag	0.070	Prox	999	TYC	T	HIP
CCDM		RAdeg	312.26597000	DEdeg	36.67792444	EpRA 1990	1.58
EpDE 1990	1.71	E RAdeg	43.5	E DEdeg	40.0	Posflg
Corr	0.1

CCDM

Ccdm	20491+3640	RComp		Comp	A	Note1
Note2		Discov num		DRAs	-2.42	DDEs	25.9
R dRAs	45	Year		Theta		Rho
Obs	2	Vmag	11.2	Sp		PmNote
PmRA		PmDE		Dm number	+36 4257	Cat1	BD
Name2		Cat2		HD		M HD
ADS BDS		M ADS BDS		N IDS		IDS	20452N3618A
HIC

20491+3640 B

Componente originario normalizzato	AB		Coord arcsec 2000	204904.17+364045.8		Mag	10.9		PmRA	-10.00
PmDE	-11.0		Calc delta mag	0.26		Calc coord	yes

CCDM

Ccdm	20491+3640	RComp		Comp	B	Note1
Note2		Discov num	SEI1260	DRAs		DDEs
R dRAs		Year	1896	Theta	044	Rho	8.4
Obs	2	Vmag	11.6	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS		M ADS BDS	N	N IDS		IDS	20452N3618B
HIC