18520+4243 LEH 1

18^h 52^m 02.91^s +42° 43' 16.5" P.A. 194.00 sep 0.4 mag 12.70,12.70 Sp G+G+G+G

Coord 2000	18520+4243	Discov num	LEH 1	Comp		Coord arcsec 2000	18 52 02.91 +42 43 16.5
Date first	2015	Date last	2015	Obs	1
Pa first	194	Pa last	193.6	P.A. Now (θ)	193.6°
Sep first	0.4	Sep last	0.41	Sep. Now (ρ)	0.41"
Mag pri	12.70	Mag sec	12.70	delta mag (ΔM)	0	Spectral class	G+G+G+G (yellow/yellow)
Pri motion ra	+003	Sec motion ra
Pri motion dec	+015	Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Lyra

WDS 18520+4243 LEH 1 : NOTES

discov_num	notes	refcode
LEH 1	Lehmann et al. (2016) find that KIC 7177553 is a quadruple system,
	consisting of two close binaries of nearly equal magnitude, separated
	by about 0.4". They estimate the distance to the quadruple as 406 +/-
	10 pc, giving a physical separation of the wide pair 167+/- 5 au and
	an orbital period >1000y. One close pair is an eclipsing binary with
	orbital period 18.00d. The other pair is an SB with period 16.5d. All
	four stars are of similar mass and spectral type (main-sequence G).	Leh2016

REFERENCES

refcode	metd	author	reference
Leh2016	orb j	Lehmann, H., Borkovits, T., Rappaport, S.A., Ngo, H., Mawet, D., Csizmadia, Sz., &	2016ApJ...819...33L
Leh2016	+A	Forgacs-Dajka, E.
Leh2016	+C	ApJ 819, 33, 2016

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18520+4243	LEH 1		2015	1	194	0.4	12.70	12.70	G+G+G+G	N	185202.91+424316.5

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WDS 18520+4243 LEH 1 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 18520+4243 LEH 1 : MEASURES

No records found.

WDS 18520+4243 : VIRTUAL EYEPIECE

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WDS 18520+4243 : ALADIN DSS IMAGE @ 18^h 52^m 02.91^s +42° 43' 16.5"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 18520+4243 LEH 1 : 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		18520+4243	LEH 1		194	0.4	1
Show		18517+4248	KOI4237		147	3.9	7
Show		18512+4229	KOI6788		272	2.6	17
Show		18505+4240	JKA 7		48	20.4	18
Show		18509+4259	BRT1922		296	3.4	20
Show		18536+4303	DEA 456		75	34.1	27
Show		18494+4239	KPP4123	AB	246	2.3	30
Show		18543+4259	OSO 105		81	15.6	30
Show		18506+4310	KOI3417		171	2.2	31
Show		18485+4240	DEA 188		68	8.9	40
Show		18521+4323	ES 1427		118	4.4	41
Show		18517+4323	BU 421	AB	296	1.2	41
Show		18517+4323	BU 421	AB,C	226	43.1	41
Show		18512+4325	ES 1426		234	9.4	43
Show		18496+4317	RAO 91		39	2.3	44
Show		18525+4327	KOI4022		64	3.4	45
Show		18539+4323	KOI1519		283	3.0	45
Show		18478+4246	COU1793		323	1.2	48
Show		18486+4214	KOI 667		133	3.0	48
Show		18525+4332	KOI2247		350	1.9	49
Show		18473+4249	KOI4136		108	3.7	53
Show		18480+4313	DEA 283		275	11.7	53
Show		18567+4232	JKA 18		358	102.8	54
Show		18516+4150	KOI6702		167	1.8	54
Show		18505+4335	COU1930		326	0.4	55
Show		18486+4323	KOI2307		277	2.4	55
Show		18533+4150	KOI 852	AB	176	4.5	55
Show		18533+4150	KOI 852	AC	220	6.0	55
Show		18476+4217	KOI4184		224	0.2	56
Show		18535+4149	KOI 510		348	2.4	57
Show		18525+4339	KOI1515		113	1.1	57
Show		18563+4315	UC 3732		263	95.2	57
Show		18572+4236	KOI3126	AB	13	3.7	58
Show		18572+4236	KOI3126	AC	225	3.7	58
Show		18528+4339	DEA 123		346	6.9	58
Show		18515+4340	UC 3697	AB	147	16.7	58
Show		18559+4321	DEA 212		255	9.6	58
Show		18522+4342	DEA 407		278	20.4	60
Show		18476+4210	KOI2005	AB	58	0.0	60
Show		18476+4210	KOI2005	AC	137	2.1	60
Show		18559+4326	DEA 252		173	10.8	61
Show		18530+4343	JKA 11		103	117.3	61
Show		18468+4224	KOI2914	AB	231	3.8	62
Show		18467+4303	ES 1425		232	4.4	62
Show		18520+4141	KOI3049	AB	190	0.5	63
Show		18520+4141	KOI3049	AC	195	0.8	63
Show		18520+4141	KOI3049	AD	255	1.2	63
Show		18520+4141	KOI3049	AE	35	1.2	63
Show		18520+4141	KOI3049	AF	337	2.9	63
Show		18498+4145	SLW1222	BC	53	22.0	64
Show		18498+4145	UC 3690	AB	28	52.8	65

WDS 18520+4243 : COMPONENTS

	A
B	pa=190.1° sep=0.40"

18520+4243 A

Componente originario normalizzato	AB		Coord arcsec 2000	185202.91+424316.5		Mag	12.7		Spectral class	G (yellow)
PmRA	3.00		PmDE	15.0

18520+4243 B

Componente originario normalizzato	AB		Coord arcsec 2000	185202.90+424316.1		Mag	12.7		Spectral class	G (yellow)
Calc coord	yes