20095+4752 BLL 45 (SV Cyg)

20^h 09^m 30.09^s +47° 52' 17.2" P.A. 140.00 sep 145.4 mag 9.01,9.92 Sp N dist. 980.39 pc (3198.03 l.y.)

Coord 2000	20095+4752	Discov num	BLL 45	Comp		Coord arcsec 2000	20 09 30.09 +47 52 17.2
Date first	1879	Date last	2019	Obs	15
Pa first	140	Pa last	139.5	P.A. Now (θ)	139.5°
Sep first	145.2	Sep last	145.37	Sep. Now (ρ)	145.37"
Mag pri	9.01	Mag sec	9.92	delta mag (ΔM)	0.91	Spectral class	N (deep red)
Pri motion ra	-001	Sec motion ra	-011
Pri motion dec	-004	Sec motion dec	-008
Notes	N (See Notes)

rPM=0.792

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Var name	SV Cyg	Constellation	Cygnus	HIP	99310	Tycho2	3563-00462-1
Gaia DR2	2082896582641906816	HD	191738	DM	BD+47 3034	BD	BD+47 3031
Distance	980.39	Distance ly	3198.03

WDS 20095+4752 BLL 45 (SV Cyg) : NOTES

discov_num	notes	refcode
BLL 45	A is the irregular variable SV Cyg. B is BD+47@3034.

REFERENCES

refcode	metd	author	reference
Bll1872	orb -	Ball, R.S.	.
Bll1872		Proc. Royal Irish Acad., June 1872
Bll1884	Ma j	Ball, R.S.	1884DunOP...5....1B
Bll1884		Pub. Dunsink Obs. 5, 1, 1884
Bll1913A	Ma -	Ball, R.S.	1913QB811.B8.......
Bll1913A		cited by Burnham (Carnegie Inst. Wash. #168, 1913)
Bll1932A	-	Ball, R.S.	1932QB821.A43......
Bll1932A		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
20095+4752	BLL 45		2004	7	139	145.2	9.01	9.92	N	N	200930.09+475217.2
20095+4752	BLL 45		2010	10	139	145.0	9.01	9.92	N	N	200930.09+475217.2
20095+4752	BLL 45		2015	11	139	144.9	9.01	9.92	N	N	200930.09+475217.2
20095+4752	BLL 45		2019	15	140	145.4	9.01	9.92	N	N	200930.09+475217.2

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WDS 20095+4752 BLL 45 (SV Cyg) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20095+4752 BLL 45 (SV Cyg) : MEASURES

No records found.

WDS 20095+4752 (SV Cyg) : VIRTUAL EYEPIECE

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WDS 20095+4752 (SV Cyg) : ALADIN DSS IMAGE @ 20^h 09^m 30.09^s +47° 52' 17.2"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20095+4752 BLL 45 (SV Cyg) : 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		20095+4752	BLL 45		140	145.4
Show		20095+4821	TDT2033		7	2.2	29
Show		20073+4811	HDS2867		124	0.4	30
Show		20070+4737	TDS1042		14	1.1	30
Show		20117+4725	TDT2072		229	0.4	35
Show		20126+4729	TDT2089		3	0.3	40
Show		20112+4714	TDT2059		177	0.8	43
Show		20057+4812	TDT1966		152	1.7	44
Show		20142+4744	ES 799	AB	14	2.2	49
Show		20142+4744	ES 799	AC	41	34.5	49
Show		20142+4744	ES 799	CD	72	4.0	49
Show		20045+4814	CHR 91		213	0.4	55
Show		20155+4743	S 743		175	208.5	61
Show		20084+4650	TDT2013		29	2.8	63
Show		20135+4653	OPI 23	AB	283	8.4	73
Show		20135+4653	OPI 23	AC	330	97.1	73
Show		20136+4644	GUI 30	DC	150	431.8	75
Show		20136+4644	ES 26	DE	252	36.3	75
Show		20070+4642	KPP 455		7	4.8	75
Show		20146+4652	OPI9004		256	8.0	80
Show		20136+4644	WRH 33	Aa,Ab	111	0.0	80
Show		20136+4644	HJ 1495	AB	328	36.5	80
Show		20136+4644	STFA 50	AC	173	108.6	80
Show		20136+4644	STFA 50	AD	322	336.7	80
Show		20136+4644	BU 1483	AF	168	43.5	80
Show		20136+4644	SMR 68	FJ	218	4.0	81
Show		20143+4648	ES 27		337	4.1	81
Show		20136+4644	BU 1483	CG	95	37.9	82
Show		20136+4644	BU 1483	CH	62	60.6	82
Show		20136+4644	BU 1483	CI	136	60.2	82
Show		20136+4644	SMR 68	HK	263	9.0	82
Show		20139+4642	SMR 69		62	7.0	84
Show		20016+4823	TDT1919		37	1.0	85
Show		20131+4911	ES 502		220	14.0	87
Show		20042+4645	HDS2861		109	16.7	87
Show		20012+4821	A 720		96	0.5	88
Show		20011+4816	STF2619	AB	239	4.0	89
Show		20011+4816	STF2619	AC	352	20.2	89
Show		20011+4816	DEA 60	AE	6	61.8	89
Show		20011+4816	STF2619	AD	352	14.8	89
Show		20011+4816	STF2619	BC	4	22.1	89
Show		20011+4816	STF2619	BD	6	16.9	89
Show		20011+4816	STF2619	CD	175	5.4	89
Show		20085+4622	A 721		43	4.0	91
Show		20105+4923	ES 1099		186	4.9	92
Show		20109+4925	KPP1341		257	10.1	95
Show		20099+4618	BRT2255		247	5.2	95
Show		20000+4737	CBL 81		257	44.0	95
Show		20179+4705	TDT2148		51	1.1	98
Show		20121+4618	OSO 120	AB	30	13.5	98
Show		20121+4618	OSO 120	AC	192	16.7	98

WDS 20095+4752 : COMPONENTS

	A
B	pa=150.2° sep=127.41"

20095+4752 A

Componente originario normalizzato	AB	Var name	SV Cyg	Coord arcsec 2000	200930.09+475217.2	Mag	9.01
Spectral class	N (deep red)	PmRA	-1.00	PmDE	-4.0	HIP	99310
Tycho2	3563-00462-1	HD	191738	BD	BD+47 3031

Tycho2

Tycho2	3563-00462-1	Pflag		RAmdeg	302.37537413	DEmdeg	47.87144498
PmRA	-1.9	PmDE	-4.2	E RAmdeg	12	E DEmdeg	13
E pmRA	1.8	E pmDE	1.7	EpRAm	1990.48	EpDEm	1990.74
Num	7	Q RAmdeg	1.4	Q DEmdeg	1.2	Q pmRA	1.3
Q pmDE	1.2	BTmag	12.709	E BTmag	0.233	VTmag	9.006
E VTmag	0.016	Prox	999	TYC	T	HIP	99310
CCDM		RAdeg	302.37538083	DEdeg	47.87145500	EpRA 1990	1.61
EpDE 1990	1.67	E RAdeg	12.8	E DEdeg	13.0	Posflg
Corr	-0.1

Hipparcos

Catalog	H	HIP	99310	Proxy		RAhms	20 09 30.09
DEdms	+47 52 17.2	Vmag	8.65	VarFlag	2	R Vmag	H
RAdeg	302.375	DEdeg	47.8715	AstroRef		Plx	1.6
CCDM	20096+4751	N CCDM	I	Nsys	1	Ncomp	1
MultFlag		Source		Qual	S	M HIP
Theta		Rho		HD	191738	BD	BD+47 3031
CD		CP		Dm number	+47 3031	VIred	4.62
SpType	R3v	R SpType		Coord arcsec 2000	200930.09+475217.2

Hipparcos 2

HIP	99310	Sn	5	So	0	Nc	1
RArad	5.2774459241	DErad	0.8355144975	Plx	1.02	PmRA	-1.05
PmDE	-5.28	E RArad	0.6	E DErad	0.58	E Plx	0.68
E pmRA	0.71	E pmDE	0.73	Hpmag	8.516	E Hpmag	0.015
SHp	0.172	VA	1	BV	2.99	E BV	0.227
VI	3.07

20095+4752 B

Componente originario normalizzato	AB		Coord arcsec 2000	200936.38+475026.7		Mag	9.92		PmRA	-11.00
PmDE	-8.0		DM	BD+47 3034		Calc delta mag	0.91		Calc coord	yes