20447+4131 MLB 25

20^h 44^m 41.91^s +41° 30' 32.8" P.A. 207.00 sep 5.7 mag 10.68,10.85

Coord 2000	20447+4131	Discov num	MLB 25	Comp		Coord arcsec 2000	20 44 41.91 +41 30 32.8
Date first	1892	Date last	2015	Obs	14
Pa first	205	Pa last	207.1	P.A. Now (θ)	207.1°
Sep first	5.5	Sep last	5.722	Sep. Now (ρ)	5.722"
Mag pri	10.68	Mag sec	10.85	delta mag (ΔM)	0.17	Spectral class
Pri motion ra	-005	Sec motion ra	-006
Pri motion dec	-009	Sec motion dec	-009
Notes

rPM=0.092 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Tycho2

3174-00742-1

Gaia DR2

2066238298581368704

WDS 20447+4131 MLB 25 : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
Mlb1918	Mb -	Milburn, W. (Espin, T.E.)	1918MNRAS..78..189E
Mlb1918		MNRAS 78, 189, 1918 (MLB 1 - 35; measures by Espin)
Mlb1919	Mb -	Milburn, W. (Espin, T.E.)	1919MNRAS..79..211E
Mlb1919		MNRAS 79, 211, 1919 (MLB 36 - 106; measures by Espin)
Mlb1920	Mb -	Milburn, W.	1920MNRAS..80..329M
Mlb1920		MNRAS 80, 329, 1920 (MLB 107 - 149)
Mlb1921	Mb -	Milburn, W.	1921MNRAS..81..232E
Mlb1921		MNRAS 81, 232, 1921 (MLB 150 - 182)
Mlb1922	Mb j	Milburn, W. (Espin, T.E.)	1922MNRAS..82..187E
Mlb1922		MNRAS 82, 187, 1922 (MLB 183 - 241; measures by Espin)
Mlb1923	Mb -	Milburn, W.	1923MNRAS..83..154E
Mlb1923		MNRAS 83, 154, 1923 (MLB 242 - 275)
Mlb1924	Mb -	Milburn, W.	1924MNRAS..84..162E
Mlb1924		MNRAS 84, 162, 1924 (MLB 276 - 322)
Mlb1925	Mb j	Milburn, W.	1925MNRAS..85..276E
Mlb1925		MNRAS 85, 276, 1925 (MLB 323 - 376)
Mlb1926	Mb -	Milburn, W.	1926MNRAS..86..131E
Mlb1926		MNRAS 86, 131, 1926 (MLB 377 - 440)
Mlb1927	Mb j	Milburn, W.	1927MNRAS..87..215E
Mlb1927	+Po	MNRAS 87, 215, 1927 (MLB 441 - 510)
Mlb1928	Mb -	Milburn, W.	1928MNRAS..88..185E
Mlb1928		MNRAS 88, 185, 1928 (MLB 511 - 551)
Mlb1929	Mb -	Milburn, W.	1929MNRAS..89..268E
Mlb1929		MNRAS 89, 268, 1929 (MLB 552 - 591)
Mlb1930	Mb -	Milburn, W.	1930MNRAS..90..317E
Mlb1930		MNRAS 90, 317, 1930 (MLB 592 - 630)
Mlb1931	Mb j	Milburn, W.	1931MNRAS..91..294E
Mlb1931		MNRAS 91, 294, 1931 (MLB 631 - 673)
Mlb1932	Ma -	Milburn, W.	1932MNRAS..92..214E
Mlb1932	+Mb	MNRAS 92, 214, 1932 (MLB 674 - 732)
Mlb1932B	Ma -	Milburn, W.	1932QB821.A43......
Mlb1932B		cited by ADS (Aitken Double Star Cat., 1932)
Mlb1933	Ma j	Milburn, W.	1933MNRAS..93..192E
Mlb1933	+Mb	MNRAS 93, 192, 1933 (MLB 733 - 806)
Mlb1934	Mb j	Milburn, W.	1934MNRAS..94..255M
Mlb1934		MNRAS 94, 255, 1934 (MLB 807 - 912)
Mlb1935	Mb j	Milburn, W.	1935MNRAS..95..298M
Mlb1935		MNRAS 95, 298, 1935 (MLB 913 - 969)
Mlb1936	Mb -	Milburn, W.	1936MNRAS..96..266M
Mlb1936		MNRAS 96, 266, 1936 (MLB 970 - 997)
Mlb1937	Ma -	Milburn, W.	1937MNRAS..97..222M
Mlb1937	+Mb	MNRAS 97, 222, 1937 (MLB 998 - 1025)
Mlb1938	Ma -	Milburn, W.	1938MNRAS..98..223M
Mlb1938	+Mb	MNRAS 98, 223, 1938 (MLB 1026 - 1032)
Mlb1939	Mb -	Milburn, W.	1939MNRAS..99..278M
Mlb1939		MNRAS 99, 278, 1939 (MLB 1033 - 1051)
Mlb9999	Mb -	Milburn, W.	...................
Mlb9999		Unpublished, manuscript or reference not found.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20447+4131	MLB 25		1998	9	207	5.7	10.68	10.85		D	204441.91+413032.8
20447+4131	MLB 25		2002	10	207	5.7	10.68	10.85		D	204441.91+413032.8
20447+4131	MLB 25		2010	11	206	5.5	10.68	10.85			204441.91+413032.8
20447+4131	MLB 25		2015	12	207	5.7	10.68	10.85			204441.91+413032.8

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

WDS 20447+4131 MLB 25 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20447+4131 MLB 25 : MEASURES

No records found.

WDS 20447+4131 : VIRTUAL EYEPIECE

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WDS 20447+4131 : ALADIN DSS IMAGE @ 20^h 44^m 41.91^s +41° 30' 32.8"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20447+4131 MLB 25 : 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		20447+4131	MLB 25		207	5.7
Show		20434+4131	HJ 1571		59	7.3	14
Show		20428+4132	ES 1571		39	7.4	21
Show		20428+4123	RAO 619		141	0.6	23
Show		20444+4103	COU2423	AB	180	0.3	28
Show		20444+4103	GRV 375	AC	197	31.4	28
Show		20421+4125	COU2420		90	0.5	31
Show		20442+4206	ES 1572		141	5.8	36
Show		20480+4126	ES 1681		146	2.1	38
Show		20417+4202	ES 1570		118	4.7	47
Show		20477+4204	BU 268		201	0.4	48
Show		20479+4204	ES 1573		39	5.0	49
Show		20446+4041	HJ 1574		278	7.4	50
Show		20446+4040	HJ 1573		274	9.8	51
Show		20413+4051	COU2419		69	0.8	55
Show		20429+4036	MLB 24		175	5.9	57
Show		20422+4041	MLB 23		41	7.6	58
Show		20472+4225	STT 414	AB	95	9.9	61
Show		20472+4225	BOT 4	AC	16	104.9	61
Show		20440+4030	SLN 85		203	9.1	61
Show		20476+4038	CNT 9		292	9.0	63
Show		20444+4027	TDT2510		157	0.9	64
Show		20396+4202	A 399		82	0.9	66
Show		20485+4041	ES 1682		152	3.1	66
Show		20432+4026	COU2421		110	0.3	67
Show		20454+4023	OSO 133	AB	114	12.0	68
Show		20454+4023	OSO 133	AC	236	11.7	68
Show		20454+4023	OSO 133	AD	67	21.8	68
Show		20454+4023	OSO 133	AE	8	22.4	68
Show		20390+4109	TDT2451		105	0.7	68
Show		20436+4024	DAM1256		106	9.6	68
Show		20508+4120	TDT2575		4	2.6	70
Show		20425+4235	GRV 369		26	24.8	70
Show		20509+4123	LDS2458		123	14.1	71
Show		20510+4125	COU2427		312	0.5	72
Show		20396+4215	GNS 11		182	3.7	73
Show		20399+4221	FMR 159		76	135.7	74
Show		20466+4020	ES 1982		301	3.9	74
Show		20408+4231	CBL 84		160	16.0	75
Show		20514+4134	LDS2460		195	8.4	75
Show		20456+4014	TDT2519		347	1.3	77
Show		20495+4035	COU2426		328	1.2	78
Show		20454+4011	TDT2518		203	0.7	80
Show		20396+4035	STT 410	AB	3	0.9	81
Show		20396+4035	STT 410	AB,C	70	68.6	81
Show		20396+4035	STT 410	AB,D	327	106.6	81
Show		20426+4013	TDT2488		138	0.5	81
Show		20453+4010	COU2293		201	1.1	82
Show		20519+4140	COU2428		113	0.7	82
Show		20488+4024	ALI1192		2	16.5	82
Show		20516+4106	ES 1683		205	5.2	82

WDS 20447+4131 : COMPONENTS

	A
B	pa=201.0° sep=5.46"

20447+4131 A

Componente originario normalizzato	AB		Coord arcsec 2000	204441.91+413032.8		Mag	10.68		PmRA	-5.00
PmDE	-9.0		Tycho2	3174-00742-1

Tycho2

Tycho2	3174-00742-1	Pflag		RAmdeg	311.17461784	DEmdeg	41.50909906
PmRA	-4.5	PmDE	-7.0	E RAmdeg	28	E DEmdeg	28
E pmRA	1.5	E pmDE	1.5	EpRAm	1987.95	EpDEm	1987.73
Num	3	Q RAmdeg	0.6	Q DEmdeg	2.8	Q pmRA	0.6
Q pmDE	2.7	BTmag	11.053	E BTmag	0.047	VTmag	10.676
E VTmag	0.048	Prox	58	TYC	T	HIP
CCDM		RAdeg	311.17463167	DEdeg	41.50911500	EpRA 1990	1.63
EpDE 1990	1.74	E RAdeg	29.3	E DEdeg	29.2	Posflg
Corr	0.0

20447+4131 B

Componente originario normalizzato	AB		Coord arcsec 2000	204441.74+413027.7		Mag	10.85		PmRA	-6.00
PmDE	-9.0		Tycho2	3174-00742-2		Calc delta mag	0.17		Calc coord	yes

Tycho2

Tycho2	3174-00742-2	Pflag		RAmdeg	311.17361069	DEmdeg	41.50767067
PmRA	-8.4	PmDE	-9.6	E RAmdeg	33	E DEmdeg	33
E pmRA	1.6	E pmDE	1.6	EpRAm	1987.29	EpDEm	1986.85
Num	3	Q RAmdeg	1.1	Q DEmdeg	1.7	Q pmRA	1.1
Q pmDE	1.6	BTmag	11.259	E BTmag	0.056	VTmag	10.850
E VTmag	0.058	Prox	58	TYC	T	HIP
CCDM		RAdeg	311.17363667	DEdeg	41.50769250	EpRA 1990	1.65
EpDE 1990	1.75	E RAdeg	34.3	E DEdeg	34.3	Posflg
Corr	0.0