20568-0449 LDS 6420 (FR Aqr)

20^h 56^m 48.53^s -04° 50' 49.1" P.A. 309.00 sep 15.1 mag 11.87,16.67 Sp M4V+DC10 dist. 17.69 pc (57.7 l.y.)

Coord 2000	20568-0449	Discov num	LDS6420	Comp		Coord arcsec 2000	20 56 48.53 -04 50 49.1
Date first	1953	Date last	2021	Obs	11
Pa first	315	Pa last	309.2	P.A. Now (θ)	309.2°
Sep first	13.8	Sep last	15.13	Sep. Now (ρ)	15.13"
Mag pri	11.87	Mag sec	16.67	delta mag (ΔM)	4.8	Spectral class	M4V+DC10 (red/white dwarf)
Pri motion ra	+787	Sec motion ra	+769
Pri motion dec	-220	Sec motion dec	-229
Notes	N V (See Notes, Proper motion indicates physical)

rPM=0.025 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Var name	FR Aqr		Constellation	Aquarius		HIP	103393		GL	Gl 812A
Distance	17.69		Distance ly	57.7

WDS 20568-0449 LDS 6420 (FR Aqr) : NOTES

discov_num	notes	refcode
LDS6420	NLTT 50192/50189	Chm2004
	This star has a wide companion at about 14" as noted in e.g. the WDS
	catalog. It is however single in the separation range covered by the
	AstraLux data.	Jnn2012

REFERENCES

refcode	metd	author	reference
Chm2004	E -	Chaname, J. & Gould, A.	2004ApJ...601..289C
Chm2004		ApJ 601, 289, 2004
Chm2004		(Photometry, coordinates, and astrometry from rNLTT. Astrometry from early
Chm2004		versions of 2MASS and UCAC, with date given only as "circa 2000". Measures
Chm2004		identical to discovery observations - predominantly close pairs - were assumed
Chm2004		not new observations, so not included in WDS. Similar concerns when primary and
Chm2004		secondary magnitudes or proper motions were the same.)
Jnn2012	Cl j	Janson, M., Hormuth, F., Bergfors, C., Brandner, W., Hippler, S., Daemgen, S.,	2012ApJ...754...44J
Jnn2012	+E2	Kudryavtseva, N., Schmalzl, E., Schnupp, C., & Henning, T.
Jnn2012		ApJ 754, 44, 2012 (some recalibrated measures published in Jnn2014b)	2014ApJS..214...17J

DISCOVERER

idgroup	discov	author
1	LDS	Luyten p.m. catalog (from additional DD list)

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20568-0449	LDS6420		2000	3	310	14.5	11.87	16.67		D	205648.53-045049.1
20568-0449	LDS6420		2003	5	310	14.8	11.87	16.67		N D	205648.53-045049.1
20568-0449	LDS6420		2012	7	310	14.9	11.87	16.67	M4V+DC10	NV	205648.53-045049.1
20568-0449	LDS6420		2015	8	309	15.0	11.87	16.67	M4V+DC10	NV	205648.53-045049.1
20568-0449	LDS6420		2016	9	309	15.0	11.87	16.67	M4V+DC10	NV	205648.53-045049.1
20568-0449	LDS6420		2021	11	309	15.1	11.87	16.67	M4V+DC10	NV	205648.53-045049.1

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

WDS 20568-0449 LDS 6420 (FR Aqr) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20568-0449 LDS 6420 (FR Aqr) : MEASURES

No records found.

WDS 20568-0449 (FR Aqr) : 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 20568-0449 (FR Aqr) : ALADIN DSS IMAGE @ 20^h 56^m 48.53^s -04° 50' 49.1"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20568-0449 LDS 6420 (FR Aqr) : 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		20568-0449	LDS6420		309	15.1
Show		20562-0459	BRT 510		314	4.8	14
Show		20559-0504	HJ 5514	AB	113	19.5	19
Show		20559-0504	HJ 5514	AC	4	7.6	19
Show		20578-0510	J 1714		94	10.2	25
Show		20586-0434	BRT 511		82	4.0	31
Show		20587-0511	KPP 928		341	7.6	35
Show		21000-0436	RST4688		112	0.3	50
Show		21001-0506	WSP 69	AB	89	7.4	52
Show		21001-0506	WSP 69	AC	15	15.0	52
Show		21001-0506	WSP 69	AD	147	17.0	52
Show		20531-0450	GWP3010		318	68.5	56
Show		20588-0402	RST4687		308	0.8	58
Show		21001-0530	UC 4356		325	25.1	64
Show		20560-0555	UC 4333		184	73.7	66
Show		20525-0438	TDS1106		252	1.4	67
Show		20567-0600	J 2330	AB	115	6.4	70
Show		20567-0600	J 2330	AC	106	27.7	70
Show		21001-0541	ROE 114	AB	307	6.5	71
Show		21001-0541	ROE 114	AC	227	38.8	71
Show		21001-0541	ROE 114	AD	138	92.0	71
Show		21004-0537	TDT2690		293	0.7	71
Show		21014-0539	CHE 304		280	7.1	77
Show		21005-0548	ROE 148		88	12.8	80
Show		20572-0612	GRF 4		30	13.1	81
Show		20514-0538	STF2729	AB	35	0.7	93
Show		20514-0538	STF2729	AC	311	74.3	93
Show		20514-0538	STF2729	AD	324	137.3	93
Show		21017-0552	TDS1111		51	1.3	95
Show		21033-0456	TDT2716		240	0.7	98
Show		21027-0410	GWP3031		164	13.1	98
Show		20539-0323	RST4686		104	0.4	98
Show		20512-0401	UC 4308		49	15.9	98
Show		20507-0529	BRT 507		69	9.2	101
Show		20523-0324	CVR 876		284	10.8	110
Show		21009-0316	CVR 235		297	75.5	113
Show		21047-0429	HJ 5244		132	13.6	120
Show		20556-0250	J 1713		327	9.0	123
Show		21041-0549	MCA 66	Aa,Ab	54	0.3	124
Show		21041-0549	STF2745	AB	198	2.4	124
Show		21005-0642	CVR 881		127	11.1	124
Show		21032-0610	RST4689		84	0.8	125
Show		21051-0510	A 177		337	1.2	126
Show		20594-0652	SKF1773		31	1.7	128
Show		20599-0653	UC 4355		21	32.1	131
Show		21050-0403	RST4690		7	0.9	132
Show		20531-0651	J 2326		80	8.1	132
Show		21027-0629	UC 4364		165	27.0	132
Show		20534-0657	GWP3012		289	119.4	136
Show		20481-0410	J 1710		205	8.5	139
Show		20576-0231	GWP3021		296	8.9	141

WDS 20568-0449 : COMPONENTS

	A
B	pa=309.3° sep=15.10"

20568-0449 A

Componente originario normalizzato	AB		Name	FR Aqr		Coord arcsec 2000	205648.53-045049.1		Mag	11.87
Spectral class	M4V (red)		PmRA	787.00		PmDE	-220.0		HIP	103393

Hipparcos

Catalog	H	HIP	103393	Proxy		RAhms	20 56 48.07
DEdms	-04 50 47.2	Vmag	11.87	VarFlag		R Vmag	G
RAdeg	314.2	DEdeg	-4.84644	AstroRef		Plx	56.56
CCDM		N CCDM		Nsys		Ncomp	1
MultFlag		Source		Qual		M HIP
Theta		Rho		HD		BD
CD		CP		Dm number		VIred	2.68
SpType	M4	R SpType		Coord arcsec 2000	205648.07-045047.2

Hipparcos 2

HIP	103393	Sn	5	So	0	Nc	1
RArad	5.4838296647	DErad	-0.084586337	Plx	56.54	PmRA	787.86
PmDE	-222.36	E RArad	2.9	E DErad	2.54	E Plx	3.92
E pmRA	4.78	E pmDE	2.65	Hpmag	11.9066	E Hpmag	0.0103
SHp	0.061	VA	0	BV	1.49	E BV	0.02
VI	2.68

20568-0449 B

Componente originario normalizzato	AB		Coord arcsec 2000	205647.75-045039.5		Mag	16.67		Spectral class	DC10 (white dwarf)
PmRA	769.00		PmDE	-229.0		Calc delta mag	4.8		Calc coord	yes