20028+3742 SEI 817 (HD 227319)

20^h 02^m 49.34^s +37° 42' 00.4" P.A. 102.00 sep 21.6 mag 10.02,12.20 Sp B

Coord 2000	20028+3742	Discov num	SEI 817	Comp		Coord arcsec 2000	20 02 49.34 +37 42 00.4
Date first	1896	Date last	2015	Obs	11
Pa first	96	Pa last	101.6	P.A. Now (θ)	101.6°
Sep first	23.4	Sep last	21.59	Sep. Now (ρ)	21.59"
Mag pri	10.02	Mag sec	12.20	delta mag (ΔM)	2.18	Spectral class	B (blue-white)
Pri motion ra	-005	Sec motion ra	-020
Pri motion dec	-008	Sec motion dec	-032
Notes

rPM=0.75

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 227319		Constellation	Cygnus		Tycho2	3150-02492-1		Gaia DR2	2060329282612139520
HD	227319

WDS 20028+3742 SEI 817 (HD 227319) : NOTES

No records found.

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
20028+3742	SEI 817		2000	4	101	21.8	10.02	12.20	B	D	200249.34+374200.4
20028+3742	SEI 817		2002	5	101	21.7	10.02	12.20	B	D	200249.34+374200.4
20028+3742	SEI 817		2010	6	102	21.4	10.02	12.20	B		200249.34+374200.4
20028+3742	SEI 817		2015	7	102	21.6	10.02	12.20	B		200249.34+374200.4

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WDS 20028+3742 SEI 817 (HD 227319) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20028+3742 SEI 817 (HD 227319) : MEASURES

No records found.

WDS 20028+3742 (HD 227319) : VIRTUAL EYEPIECE

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

WDS 20028+3742 (HD 227319) : ALADIN DSS IMAGE @ 20^h 02^m 49.34^s +37° 42' 00.4"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20028+3742 SEI 817 (HD 227319) : 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		20028+3742	SEI 817		102	21.6
Show		20031+3733	ES 2045		135	3.7	8
Show		20033+3736	GMZ 199		304	11.9	9
Show		20024+3728	SEI 813		328	24.3	16
Show		20025+3724	SEI 814		326	19.1	19
Show		20022+3724	NYS 4		131	23.6	20
Show		20042+3728	ALI 654		351	10.9	21
Show		20042+3755	TOR 19		97	8.8	22
Show		20010+3742	BU 1289	AB	55	0.7	22
Show		20010+3742	BU 1289	AC	89	21.5	22
Show		20010+3742	FOX 246	AB,D	170	104.2	22
Show		20010+3742	WAL 125	AB,E	10	46.5	22
Show		20010+3737	SEI 786		253	28.8	23
Show		20033+3807	SEI 825		155	7.2	26
Show		20056+3746	A 1414		34	0.3	33
Show		20034+3815	A 1412		228	0.8	34
Show		20012+3811	ALI 652		55	9.4	35
Show		20041+3815	TOR 18		116	13.2	36
Show		20024+3706	SEI 810		157	20.2	37
Show		20037+3820	HJ 1470		340	29.3	39
Show		20042+3707	ALI 403		130	13.7	39
Show		20059+3755	ES 2119	BC	256	5.7	40
Show		20059+3755	ES 2119	AB	256	12.8	40
Show		20030+3701	COU2211		257	1.0	41
Show		20022+3822	TDT1927		243	0.8	41
Show		20017+3703	GRV 306		213	29.1	41
Show		19596+3756	SEI 775		65	20.3	41
Show		20039+3822	SEI 835		10	25.6	42
Show		20044+3820	TOR 20		158	17.3	43
Show		20051+3814	COU2213		174	2.5	44
Show		20050+3707	COU2212		198	0.5	44
Show		19592+3724	COU2412		78	0.4	46
Show		19590+3750	ALI 651		200	16.8	46
Show		20057+3711	SEI 850		339	25.8	47
Show		20060+3714	TOB 165	CD	102	29.6	47
Show		20060+3714	TOB 165	BC	33	22.3	47
Show		20060+3714	SEI 866	AB	326	22.7	48
Show		20060+3714	TOB 165	AD	42	42.2	48
Show		19590+3759	SEI 760		158	5.2	49
Show		20005+3659	SEI 782		199	25.7	52
Show		19591+3809	COU2411		49	0.4	52
Show		20062+3708	SEI 874		347	25.5	53
Show		19584+3751	KPP2624		114	24.2	54
Show		20060+3821	POP 185	AB	125	43.5	54
Show		20060+3821	POP 185	AC	185	64.9	54
Show		20060+3821	POP 185	AD	62	128.5	54
Show		20060+3821	POP 185	AE	101	120.0	54
Show		20060+3821	POP 185	AG	293	19.1	54
Show		20073+3738	TDT1995	AB	344	2.5	55
Show		20073+3738	POP 189	AC	328	7.6	55
Show		20073+3753	SKF 290		157	22.9	55

WDS 20028+3742 : COMPONENTS

	A
B	pa=104.5° sep=17.29"

20028+3742 A

Componente originario normalizzato	AB	Name	HD 227319	Coord arcsec 2000	200249.34+374200.4	Mag	10.02
Spectral class	B (blue-white)	PmRA	-5.00	PmDE	-8.0	Tycho2	3150-02492-1
HD	227319

Tycho2

Tycho2	3150-02492-1	Pflag		RAmdeg	300.70563373	DEmdeg	37.70011965
PmRA	-5.5	PmDE	-10.1	E RAmdeg	16	E DEmdeg	15
E pmRA	1.3	E pmDE	1.3	EpRAm	1989.12	EpDEm	1989.47
Num	6	Q RAmdeg	1.1	Q DEmdeg	1.1	Q pmRA	1.1
Q pmDE	1.2	BTmag	10.062	E BTmag	0.027	VTmag	10.017
E VTmag	0.031	Prox	999	TYC	T	HIP
CCDM		RAdeg	300.70565139	DEdeg	37.70014222	EpRA 1990	1.62
EpDE 1990	1.78	E RAdeg	17.2	E DEdeg	16.2	Posflg
Corr	0.1

CCDM

Ccdm	20028+3742	RComp		Comp	A	Note1
Note2		Discov num		DRAs	1.39	DDEs	-0.1
R dRAs	65	Year		Theta		Rho
Obs	2	Vmag	10.6	Sp	A	PmNote
PmRA		PmDE		Dm number	+37 3736	Cat1	BD
Name2		Cat2		HD	227319	M HD
ADS BDS		M ADS BDS		N IDS		IDS	19592N3725A
HIC

20028+3742 B

Componente originario normalizzato	AB		Coord arcsec 2000	200250.75+374156.1		Mag	12.2		PmRA	-20.00
PmDE	-32.0		Calc delta mag	2.18		Calc coord	yes

CCDM

Ccdm	20028+3742	RComp		Comp	B	Note1
Note2		Discov num	SEI 817	DRAs	3.20	DDEs	-3.6
R dRAs	65	Year	1896	Theta	095	Rho	23.3
Obs	1	Vmag	12.8	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS		M ADS BDS		N IDS		IDS	19592N3725B
HIC