21022+0711 STF 2742 (Lam Equ)

21^h 02^m 12.51^s +07° 10' 47.3" P.A. 213.00 sep 3.0 mag 7.41,7.64 Sp F8 dist. 80.97 pc (264.12 l.y.)

Coord 2000	21022+0711	Discov num	STF2742	Comp		Coord arcsec 2000	21 02 12.51 +07 10 47.3
Date first	1825	Date last	2021	Obs	193
Pa first	224	Pa last	213.2	P.A. Now (θ)	213.2°
Sep first	2.4	Sep last	3	Sep. Now (ρ)	3"
Mag pri	7.41	Mag sec	7.64	delta mag (ΔM)	0.23	Spectral class	F8 (yellow-white)
Pri motion ra	-006	Sec motion ra	-006
Pri motion dec	-016	Sec motion dec	-016
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Name	Lam Equ	Constellation	Equuleus	SAO	126482	HIP	103813
Tycho2	0538-02807-1	Gaia DR2	1737064858187956224	HD	200256	GC	29361
BD	BD+06 4731	Bayer	Lambda Equulei	Bayer name	Lam Equ	Flamsteed	2 Equulei
Flamsteed name	2 Equ	Distance	80.97	Distance ly	264.12	Bayer greek	λ Equ

WDS 21022+0711 STF 2742 (Lam Equ) : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
STFA		(F. Struve DD - Appendix list #1)	...................
STFB		(F. Struve DD - Appendix list #2)	...................
StF1833A	Ma -	Struve, F.G.W.	1833MmRAS...5...13H
StF1833A	+Mc	cited by Herschel (MemRAS 5, 13, 1833)
StF1833B	Ma -	Struve, F.G.W.	1833AN.....10..389B
StF1833B		cited by Bessel (AN 10, 389, 1833)
StF1837	Ma -	Struve, F.G.W.	1837AN.....14...249
StF1837		Stellarum duplicium et multiplicium mensurae micrometricae...
StF1837		(Dorpat, Academiae scientiarum caesareae petropolitaneifique), 1837
StF1844A	Ma -	Struve, F.G.W.	1844QB43.S66.......
StF1844A		cited by Smyth (Cycle of Celestial Objects 2, 1844)
StF1852A	Ma -	Struve, F.G.W.	.
StF1852A		cited by Bishop (Bishop Obs. Astron. Observations 1852)
StF1865A	Ma -	Struve, F.G.W.	1865AN.....64...81E
StF1865A		cited by Engelmann (AN 64, 81, #1518, 1865)
StF1875A	Ma -	Struve, F.G.W.	1875AN.....85..323D
StF1875A		cited by Doberck, 1875 (see Dob1875b,f,g,h)
StF1878	Ma -	Struve, F.G.W.	.
StF1878		Pulkova Observations 9, 1878
StF1878B	Ma -	Struve, F.G.W.	1878Obs.....2..239G
StF1878B		cited by Gledhill (Obs 2, 239, 1878)
StF1880A	Ma -	Struve, F.G.W.	1880Obs.....3..535G
StF1880A		cited by Gledhill (Obs 3, 535, 1880)
StF1906A	Ma -	Struve, F.G.W.	1906QB821.B972.....
StF1906A		cited in BDS (Burnham Double Star Cat.), 1906
StF1906B	Ma -	Struve, F.G.W.	1906MmRAS..56....1L
StF1906B		cited by Lewis (MemRAS 56, 1, 1906)
StF1922A	Ma -	Struve, F.G.W.	1922AN....216...49R
StF1922A		cited by Rabe (AN 216, 49, 1922)
StF1932A	Ma -	Struve, F.G.W.	1932QB821.A43......
StF1932A		cited in ADS (Aitken Double Star Cat.), 1932
StF2002	- -	Weis, J.
StF2002		F. G. W. Struve's double stars : the Dorpat catalogue; the Pulkovo catalogue
StF2002		USNO Library : QB 821 .S8 W49 2002
StF2022	- -	email note from Jan Weis: 6 July 2022
StF9999	Ma -	Struve, F.G.W.	...................
StF9999		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
21022+0711	STF2742		2007	195	216	3.0	7.41	7.64	F8	D	210212.51+071047.3
21022+0711	STF2742		2008	196	214	2.8	7.41	7.64	F8	D	210212.51+071047.3
21022+0711	STF2742		2010	199	214	2.9	7.41	7.64	F8	D	210212.51+071047.3
21022+0711	STF2742		2011	202	214	2.9	7.41	7.64	F8	D	210212.51+071047.3
21022+0711	STF2742		2015	186	213	2.9	7.41	7.64	F8		210212.51+071047.3
21022+0711	STF2742		2017	190	215	2.9	7.41	7.64	F8		210212.51+071047.3
21022+0711	STF2742		2020	191	213	3.0	7.41	7.64	F8		210212.51+071047.3
21022+0711	STF2742		2021	193	213	3.0	7.41	7.64	F8		210212.51+071047.3

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

WDS 21022+0711 STF 2742 (Lam Equ) : VISUAL OBSERVATIONS REPORTS

Show	date	username	difficulty	separation	pa_estim	interest	notes
Show	22/09/02	daedalus1	mean difficulty	separated	213		Seeing: Pickering 6, good. Measures: theta 213, rho 3.0 +/- 0.062. Primary very slightly brighter. Target is the brightest star in a very nice field.

WDS 21022+0711 STF 2742 (Lam Equ) : MEASURES

No records found.

WDS 21022+0711 (Lam Equ) : 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 21022+0711 (Lam Equ) : ALADIN DSS IMAGE @ 21^h 02^m 12.51^s +07° 10' 47.3"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 21022+0711 STF 2742 (Lam Equ) : 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		21022+0711	STF2742		213	3.0
Show		21021+0703	WSP 90	AB	185	1.0	8
Show		21021+0703	WSP 90	AC	1	9.5	8
Show		21021+0703	WSP 90	AD	83	16.5	8
Show		21010+0704	HEI 821		90	2.9	20
Show		21030+0650	GRV 406		287	10.5	24
Show		21001+0731	KUI 102		191	0.2	38
Show		21024+0625	TDT2708		27	0.8	47
Show		21018+0757	CVR 883		128	28.3	47
Show		21053+0704	ENG 80	AB	240	64.6	47
Show		21053+0704	ENG 80	AC	106	169.4	47
Show		21045+0746	BU 269		239	1.2	50
Show		21046+0750	HJ 3008		80	27.0	54
Show		20586+0723	J 1715		125	5.2	56
Show		20583+0654	KPP 481		233	3.8	62
Show		21051+0757	HDS3004	AB	252	0.3	64
Show		21051+0757	MET 90	AC	354	4.3	64
Show		21051+0757	MET 90	AD	166	9.8	64
Show		20584+0757	ARY 68		339	112.4	74
Show		21068+0737	GRV 419		302	38.8	75
Show		21059+0803	OSO 140		273	18.7	76
Show		21006+0554	GRV 403		116	33.5	80
Show		20580+0804	ARY 67		1	152.9	83
Show		20566+0659	TDT2649		8	0.6	85
Show		20588+0600	UC 4347		31	40.4	87
Show		21054+0557	BUP 224		301	30.4	88
Show		21014+0542	ELP 47		25	6.3	90
Show		20562+0728	LDS4861		90	2.0	90
Show		20560+0708	GWP3020		179	6.7	93
Show		21080+0630	SKF2741		40	1.9	96
Show		20559+0646	NSN 739		52	8.8	97
Show		20593+0838	HDS2991		167	0.1	98
Show		20583+0831	ARY 87		215	62.2	100
Show		20596+0842	SKF2096		109	9.2	100
Show		20556+0649	TDT2635		259	0.8	102
Show		20554+0653	BRT2188		46	4.2	104
Show		20582+0835	TDT2664		274	0.4	104
Show		21061+0837	A 1217		193	2.0	104
Show		20572+0823	UC 4341		344	63.1	105
Show		21090+0643	STT 428		256	24.0	105
Show		21092+0728	KPP 485		7	5.0	105
Show		21089+0741	GRV 424		327	12.1	106
Show		20552+0729	GWP3017		96	132.1	107
Show		21046+0530	BUP 223		252	82.5	107
Show		21008+0904	UC 4359		85	33.3	115
Show		20546+0641	SLN 86		160	4.8	118
Show		21024+0513	A 615		129	3.5	119
Show		21093+0618	TDT2789		20	2.0	119
Show		20543+0650	TDT2621		4	1.7	120
Show		20569+0842	RAO 443		297	0.2	122
Show		20568+0844	CRB 13		177	131.6	123

WDS 21022+0711 : COMPONENTS

	A
B	pa=213.0° sep=2.99"

21022+0711 A

Componente originario normalizzato	AB	Name	Lam Equ	Coord arcsec 2000	210212.51+071047.3	Mag	7.41
Spectral class	F8 (yellow-white)	PmRA	-6.00	PmDE	-16.0	SAO	126482
HIP	103813	Tycho2	0538-02807-1	HD	200256	GC	29361
BD	BD+06 4731	Bayer	Lambda Equulei	Bayer name	Lam Equ	Flamsteed	2 Equulei
Flamsteed name	2 Equ

Tycho2

Tycho2	0538-02807-1	Pflag		RAmdeg	315.55212242	DEmdeg	7.17979282
PmRA	4.8	PmDE	-4.4	E RAmdeg	4	E DEmdeg	5
E pmRA	5.0	E pmDE	4.3	EpRAm	1991.62	EpDEm	1991.15
Num	3	Q RAmdeg	0.5	Q DEmdeg	0.8	Q pmRA	0.4
Q pmDE	0.8	BTmag	7.959	E BTmag	0.016	VTmag	7.406
E VTmag	0.010	Prox	28	TYC	T	HIP	103813
CCDM	A	RAdeg	315.55211139	DEdeg	7.17980361	EpRA 1990	1.63
EpDE 1990	1.17	E RAdeg	4.2	E DEdeg	5.0	Posflg	D
Corr	-0.1

SAO

SAO	126482	DelFlag		RA1950		PmRA1950	-0.0006
DE1950		PmDE1950	-0.008	Vmag	6.6	SpType	F8
Double code		Source	70	CatNum	29361	DM	BD+06 4731
DMcomp		BDsup		HD	200256	M HD	0
GC	29361	RA1950rad	5.49665937	DE1950rad	0.12186025	PmRA2000	-0.0005
PmDE2000	-0.012

Hipparcos

Catalog	H	HIP	103813	Proxy	H	RAhms	21 02 12.51
DEdms	+07 10 47.3	Vmag	6.72	VarFlag		R Vmag	H
RAdeg	315.552	DEdeg	7.1798	AstroRef	A	Plx	9.83
CCDM	21022+0711	N CCDM	I	Nsys	1	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	AB
Theta	215	Rho	2.854	HD	200256	BD	BD+06 4731
CD		CP		Dm number	+06 4731	VIred	0.34
SpType	F8	R SpType		Coord arcsec 2000	210212.51+071047.3

Hipparcos 2

HIP	103813	Sn	15	So	3	Nc	2
RArad	5.5074233541	DErad	0.1253111687	Plx	12.35	PmRA	-8.14
PmDE	-14.79	E RArad	1.08	E DErad	0.48	E Plx	1.04
E pmRA	1.45	E pmDE	0.48	Hpmag	6.8107	E Hpmag	0.0011
SHp	0.009	VA	0	BV	0.5	E BV	0.02
VI	0.48

CCDM

Ccdm	21022+0711	RComp		Comp	A	Note1
Note2		Discov num		DRAs	0.44	DDEs	-13.2
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	7.4	Sp	F8	PmNote	*
PmRA	-14	PmDE	-2	Dm number	+06 4731	Cat1	BD
Name2	+06 2877	Cat2	AGK2/3	HD	200256	M HD
ADS BDS	A14556	M ADS BDS		N IDS		IDS	20573N0647A
HIC	103813

21022+0711 B

Componente originario normalizzato	AB		Coord arcsec 2000	210212.40+071044.8		Mag	7.64		PmRA	-6.00
PmDE	-16.0		Calc delta mag	0.23		Calc coord	yes

CCDM

Ccdm	21022+0711	RComp		Comp	B	Note1
Note2		Discov num	STF2742	DRAs		DDEs
R dRAs		Year	1955	Theta	218	Rho	2.8
Obs	99	Vmag	7.4	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A14556	M ADS BDS		N IDS		IDS	20573N0647B
HIC	103813