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20527+4607
A 750

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Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20527+4607 A 750

20^h 52^m 44.94^s +46° 06' 47.7" P.A. 211.00 sep 0.1 mag 9.11,10.26 Sp G8V dist. 52.71 pc (171.94 l.y.)

Coord 2000	20527+4607	Discov num	A 750	Comp		Coord arcsec 2000	20 52 44.94 +46 06 47.7
Date first	1904	Date last	2010	Obs	36
Pa first	250	Pa last	210.7	P.A. Now (θ)	258°
Sep first	0.3	Sep last	0.133	Sep. Now (ρ)	0.339"
Mag pri	9.11	Mag sec	10.26	delta mag (ΔM)	1.15	Spectral class	G8V (yellow)
Pri motion ra	-033	Sec motion ra
Pri motion dec	-024	Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Constellation	Cygnus		SAO	50171		HIP	103055		Gaia DR2	2163403515533704320
ADS	14396		BD	BD+45 3310		Distance	52.71		Distance ly	171.94

ORBITAL ELEMENTS

Period (P)	30.45y	Periastron (T)	2013.49y	Semi-major axis (a)	0.212a
Eccentricity (e)	0.723	Inclination (i)	128.7°	Longitude of periastron (ω)	351.6°
Node (Ω)	65.9°	Notes	n	Reference	Doc2013f
Equinox	2000	Last observation	2009	Grade	3	(1=Definitive, 9=Indet.)

label	theta	rho
2000	248.2	0.362
2001	246.4	0.357
2002	244.5	0.350
2003	242.6	0.339
2004	240.5	0.326
2005	238.3	0.309
2006	235.7	0.289
2007	232.7	0.265
2008	229.1	0.236
2009	224.3	0.203
2010	217.5	0.165
2011	206.0	0.120
2012	179.7	0.073
2013	108.3	0.052
2014	37.9	0.059
2015	337.2	0.070
2016	305.4	0.105
2017	290.3	0.145
2018	281.6	0.181
2019	275.7	0.214
2020	271.3	0.243
2021	267.8	0.269
2022	264.9	0.291
2023	262.3	0.310
2024	260.1	0.326
2025	258.0	0.339
2026	256.1	0.349
2027	254.2	0.356
2028	252.4	0.361
2029	250.7	0.363
2030	248.9	0.363
2031	247.2	0.359
2032	245.4	0.353
2033	243.5	0.344
2034	241.5	0.332
2035	239.3	0.317
2036	236.9	0.299
2037	234.1	0.276
2038	230.8	0.250
2039	226.6	0.219
2040	220.9	0.183
2041	212.0	0.141
2042	194.8	0.094
2043	146.7	0.054
2044	67.2	0.059
2045	1.9	0.061
2046	316.5	0.088
2047	296.0	0.127
2048	285.1	0.165
2049	278.1	0.200
2050	273.2	0.231

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

Measures: green=micrometric, blue=interferometric, purple=photographic

WDS 20527+4607 A 750 : NOTES

discov_num	notes	refcode
A 750	Only elements P and T of Muller (1955) were adjusted in computing	Mlr1955b
	the solution of Starikova (1981).	Sta1981a
	Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
	masses of 2.02 +/- 0.42, 1.76, and 0.91 Msun, respectively.	Mlk2012

REFERENCES

refcode	metd	author	reference
Doc2013f	orb -	Docobo, J.A. & Campo, P.	2013IAUDS.180Q...1D
Doc2013f		Inf. Circ. 180, 1, 2013
Mlk2012	not -	Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A.	2012A&A...546A..69M
Mlk2012		A&A 546, A69, 2012
Mlr1955b	orb -	Muller, P.	1955JO.....38...58M
Mlr1955b		J. Obs. 38, 58-64, 1955
Sta1981a	orb -	Starikova, G.A.	1981SvAL....7..130S
Sta1981a		SvAL 7, 130, 1981

DISCOVERER

discov	author
A	Aitken, R.G.
DOC	Docobo, J.A., Andrade, M., Ling, J.F., Prieto, C., Tamazian, V.S., Balega, Yu.Yu.,
DOC	Blanco, J., Maximov, A.F., et al.
DOC	Docobo, J.A., Tamazian, V.S., Andrade, M., Ling, J.F., Balega, Y.Y.,
DOC	Lahulla, J.F., & Maximov, A.
DOC	Docobo, J.A., Tamazian, V.S., Balega, Y.Y., Andrade, M., Schertl, D., Weigelt, G.,
DOC	Campo, P., & Palacios, M.
DOC	Docobo, J.A., Tamazian, V.S., Andrade, M., Ling, J.F., Balega, Y.Y.,
DOC	Lahulla, J.F., & Maximov, A.
DOC	Highlights of Spanish Astrophysics V, Ap&SS Proc. (Springer-Verlag, Berlin),
DOC	p 491, 2010 (no data)

WDS HISTORIC DATA

coord_2000

discov_num

comp

epoch

obs

sep

mag_pri

mag_sec

spectr

dm_number

notes

coord_arcsec_2000

20527+4607

A 750

1995

255

0.3

9.11

10.26

G8V

+45 3310

NOD

205244.94+460647.7

20527+4607

A 750

2007

230

0.2

9.11

10.26

G8V

+45 3310

NOD

205244.94+460647.7

20527+4607

A 750

2009

221

0.2

9.11

10.26

G8V

+45 3310

NOD

205244.94+460647.7

20527+4607

A 750

2010

211

0.1

9.11

10.26

G8V

+45 3310

205244.94+460647.7

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

WDS 20527+4607 A 750 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20527+4607 A 750 : MEASURES

No records found.

WDS 20527+4607 : VIRTUAL EYEPIECE

Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.

WDS 20527+4607 : ALADIN DSS IMAGE @ 20^h 52^m 44.94^s +46° 06' 47.7"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20527+4607 A 750 : NEIGHBORHOODS

Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show		20527+4607	A 750		211	0.1	0
Show		20528+4551	COU2647		225	0.4	16
Show		20527+4547	TDT2597		327	1.3	21
Show		20547+4614	YSC 163		101	0.7	22
Show		20539+4632	ES 673		76	5.2	26
Show		20508+4628	BRT2276	AB	254	3.7	31
Show		20508+4628	FYM 314	AC	149	9.5	31
Show		20508+4628	FYM 314	AD	86	11.2	31
Show		20519+4537	SMA 122		262	7.4	32
Show		20531+4615	HJ 1591		134	10.1	33
Show		20494+4613	ES 670		81	6.5	35
Show		20562+4615	A 753	AB	256	1.0	37
Show		20562+4615	A 753	AB,C	263	9.3	37
Show		20501+4635	ES 671		91	1.6	40
Show		20489+4607	HJ 1581		170	22.4	40
Show		20499+4640	BU 250		7	18.3	45
Show		20535+4523	HDS2975		191	0.2	45
Show		20522+4653	BRT2278		196	3.2	46
Show		20504+4525	LDS5912		252	17.4	49
Show		20489+4537	HDS2965		282	0.1	50
Show		20514+4519	ARG 40		250	9.2	50
Show		20571+4632	TDT2653		199	2.1	52
Show		20500+4521	ES 2702		348	8.6	55
Show		20492+4525	COU2646		266	0.4	57
Show		20490+4525	SMA 120		313	4.3	58
Show		20542+4508	LDS5915		43	18.0	61
Show		20541+4507	STT 422		332	2.6	63
Show		20585+4626	TDT2667		17	1.1	64
Show		20579+4532	ES 677		160	5.8	64
Show		20578+4530	ES 676		293	7.6	65
Show		20473+4535	HO 280		75	11.7	65
Show		20485+4519	LDS2456		236	18.0	66
Show		20482+4653	ES 669		28	6.8	66
Show		20504+4518	SMA 121		32	11.6	67
Show		20466+4632	KUI 101		113	0.2	69
Show		20464+4551	CVR 230		7	112.9	69
Show		20571+4658	TDS1108		96	1.0	69
Show		20511+4459	LDS2459		228	43.7	70
Show		20517+4721	TDT2584		177	2.4	76
Show		20456+4621	HDS2955		289	0.4	76
Show		20566+4712	HDS2982		161	0.1	77
Show		20494+4458	GRV 384		222	22.1	77
Show		20549+4451	LDS2466		287	4.8	80
Show		20556+4453	COU2648		20	1.3	80
Show		20555+4722	TOB 201	CD	71	10.3	80
Show		20555+4722	TOB 201	AB	82	20.0	80
Show		20555+4722	TOB 201	AC	146	13.4	80
Show		20555+4722	TOB 201	AD	114	18.9	80
Show		20555+4723	TDT2632	Aa,Ab	169	0.6	82
Show		20555+4723	ES 95	AB	268	6.5	82
Show		20555+4723	HJ 1597	AC	127	13.6	82

WDS 20527+4607 : COMPONENTS

	A
B	pa=210.7° sep=0.13"

20527+4607 A

Coord arcsec 2000	205244.94+460647.7		Mag	9.11		Spectral class	G8V (yellow)		PmRA	-33.00
PmDE	-24.0		SAO	50171		HIP	103055		BD	BD+45 3310

SAO

SAO	50171	DelFlag		RA1950		PmRA1950	-0.0039
DE1950		PmDE1950	0.016	Vmag	8.6	SpType
Double code		Source	3	CatNum	1768	DM	BD+45 3310
DMcomp		BDsup		HD		M HD
GC		RA1950rad	5.45865634	DE1950rad	0.80152506	PmRA2000	-0.0036
PmDE2000	0.013

Hipparcos

Catalog	H	HIP	103055	Proxy	H	RAhms	20 52 44.94
DEdms	+46 06 47.7	Vmag	8.65	VarFlag		R Vmag	H
RAdeg	313.187	DEdeg	46.1133	AstroRef	A	Plx	18.68
CCDM	-24.60	N CCDM	I	Nsys	1	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	AB
Theta	266	Rho	0.304	HD		BD	BD+45 3310
CD		CP		Dm number	+45 3310	VIred	0.93
SpType	G8V	R SpType		Coord arcsec 2000	205244.94+460647.7

Hipparcos 2

HIP	103055	Sn	15	So	3	Nc	2
RArad	5.4661484556	DErad	0.8048280653	Plx	18.97	PmRA	-26.67
PmDE	-13.82	E RArad	0.87	E DErad	0.76	E Plx	1
E pmRA	1.13	E pmDE	1.01	Hpmag		E Hpmag	0.0019
SHp	0.016	VA	0	BV	0.804	E BV	0.019
VI	0.83

CCDM

Ccdm	20527+4607	RComp		Comp	A	Note1
Note2		Discov num		DRAs	2.95	DDEs	-12.9
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	8.9	Sp		PmNote	*
PmRA	-27	PmDE	-27	Dm number	+45 3310	Cat1	BD
Name2	+45 1768	Cat2	AGK2/3	HD		M HD
ADS BDS	A14396	M ADS BDS		N IDS		IDS	20493N4544A
HIC	103055

20527+4607 B

Coord arcsec 2000

205244.93+460647.6

Mag

10.26

Delta magnitude

1.15

Coordinate calculated

yes

CCDM

Ccdm	20527+4607	RComp		Comp	B	Note1	*
Note2		Discov num	A 750	DRAs		DDEs
R dRAs		Year	1904	Theta		Rho
Obs	13	Vmag	9.7	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A14396	M ADS BDS		N IDS		IDS	20493N4544B
HIC	103055