21578-4255 DON 1020

21^h 57^m 50.80^s -42° 55' 16.2" P.A. 52.00 sep 1.7 mag 11.19,12.78

Coord 2000	21578-4255	Discov num	DON1020	Comp		Coord arcsec 2000	21 57 50.80 -42 55 16.2
Date first	1931	Date last	2016	Obs	6
Pa first	53	Pa last	52.2	P.A. Now (θ)	52.2°
Sep first	1.6	Sep last	1.693	Sep. Now (ρ)	1.693"
Mag pri	11.19	Mag sec	12.78	delta mag (ΔM)	1.59	Spectral class
Pri motion ra	+018	Sec motion ra	+018
Pri motion dec	+000	Sec motion dec	+000
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Grus

Tycho2

7990-00983-1

Gaia DR2

6571189431898481024

WDS 21578-4255 DON 1020 : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
Don1937	Ma j	Donner, H.F.	1937MmRAS..65...51R
Don1937		MemRAS 65, 51, 1937
Don1955	Ma -	Donner, H.F.	1955POMic..11....1R
Don1955		Pub. Univ. Michigan Obs. 11, 1, 1955
Don1964	Ma j	Donner, H.F.	1964POMic...9...73R
Don1964		Pub. Univ. Michigan Obs. 9, 73, 1964

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21578-4255	DON1020		1991	4	56	1.8	11.19	12.78			215750.80-425516.2
21578-4255	DON1020		2015	5	52	1.7	11.19	12.78			215750.80-425516.2
21578-4255	DON1020		2016	6	52	1.7	11.19	12.78			215750.80-425516.2

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

WDS 21578-4255 DON 1020 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 21578-4255 DON 1020 : MEASURES

No records found.

WDS 21578-4255 : VIRTUAL EYEPIECE

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WDS 21578-4255 : ALADIN DSS IMAGE @ 21^h 57^m 50.80^s -42° 55' 16.2"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 21578-4255 DON 1020 : 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		21578-4255	DON1020		52	1.7
Show		21560-4234	HJ 5303		55	34.0	30
Show		21579-4327	LDS 766		333	8.9	33
Show		22010-4323	CPO 628		159	5.2	45
Show		22001-4213	SKF1177		38	24.4	50
Show		22016-4204	CRU9032		76	49.7	66
Show		21550-4154	CPO 627		283	5.6	69
Show		22043-4259	TDT3322		50	0.5	71
Show		21519-4325	SKF 381		32	5.6	72
Show		22043-4243	HJ 5314		55	12.8	73
Show		21519-4222	B 2898		218	13.7	74
Show		21570-4139	UC 4608		88	17.2	77
Show		21555-4141	DON1019		136	0.8	79
Show		21544-4410	CBL 185		74	18.0	84
Show		21522-4151	TDT3206		164	1.0	90
Show		22014-4416	SKF1178		216	50.5	90
Show		21514-4153	CRU9027	AB	97	99.7	95
Show		21514-4153	CRU9027	AC	171	135.7	95
Show		22064-4238	UC 4650		32	49.4	97
Show		21555-4121	CRU9030		252	47.1	98
Show		21517-4140	CRU9028		175	104.1	102
Show		21565-4102	HJ 5305		243	19.7	115
Show		22075-4346	DON1024		254	0.4	117
Show		21497-4139	TSN 199		303	0.1	119
Show		21467-4228	DON1018		82	1.6	126
Show		21492-4133	WTR 1		126	2.7	127
Show		22096-4305	TDT3377		248	0.5	130
Show		22084-4403	HDS3146		358	0.1	134
Show		21529-4052	I 1447		272	4.1	135
Show		21510-4452	RST5480		6	0.8	139
Show		22000-4032	HDS3124		128	0.1	145
Show		21509-4052	CRU 2	AB	307	23.2	146
Show		21509-4052	CRU 2	AC	48	58.4	146
Show		21573-4525	HJ 5308		314	18.7	150
Show		22100-4147	B 552		284	0.7	151
Show		21578-4024	CRU9031		69	84.9	152
Show		22038-4039	CPO 629		147	5.1	152
Show		22028-4517	I 1451		126	0.8	152
Show		21525-4034	CRU9029		68	90.5	153
Show		22067-4458	TSN 201		145	0.3	156
Show		22015-4025	TVB 321		161	10.3	156
Show		22120-4308	RSS 568		54	9.7	157
Show		21459-4130	UC 4554	AB	160	53.4	159
Show		21433-4327	HDS3095	AB	210	0.4	163
Show		21433-4327	HDS3095	Ba,Bb	281	0.1	163
Show		22020-4019	HDS3127		180	17.2	163
Show		21479-4500	I 1446		130	0.4	165
Show		21428-4247	DON1015		340	2.1	166
Show		21446-4140	WIS 353		14	14.5	166
Show		21454-4432	BRT1123		30	5.1	167
Show		21458-4113	SEE 457		234	12.0	168

WDS 21578-4255 : COMPONENTS

	A
B	pa=43.4° sep=1.43"

21578-4255 A

Componente originario normalizzato	AB		Coord arcsec 2000	215750.80-425516.2		Mag	11.19		PmRA	18.00
PmDE	0.0		Tycho2	7990-00983-1		DM	CD-4314810

Tycho2

Tycho2	7990-00983-1	Pflag	P	RAmdeg	329.46166306	DEmdeg	-42.92117513
PmRA	17.5	PmDE	-0.4	E RAmdeg	39	E DEmdeg	57
E pmRA	2.4	E pmDE	2.3	EpRAm	1988.72	EpDEm	1983.41
Num	3	Q RAmdeg	1.9	Q DEmdeg	0.5	Q pmRA	1.9
Q pmDE	0.5	BTmag	11.744	E BTmag	0.079	VTmag	11.191
E VTmag	0.082	Prox	18	TYC	T	HIP
CCDM		RAdeg	329.46159472	DEdeg	-42.92118111	EpRA 1990	1.74
EpDE 1990	1.27	E RAdeg	40.1	E DEdeg	60.0	Posflg	D
Corr	0.0

21578-4255 B

Componente originario normalizzato	AB		Coord arcsec 2000	215750.89-425515.2		Mag	12.78		PmRA	18.00
PmDE	0.0		Tycho2	7990-00983-2		Calc delta mag	1.59		Calc coord	yes

Tycho2

Tycho2	7990-00983-2	Pflag	P	RAmdeg	329.46166306	DEmdeg	-42.92117513
PmRA	17.5	PmDE	-0.4	E RAmdeg	39	E DEmdeg	57
E pmRA	2.4	E pmDE	2.3	EpRAm	1988.72	EpDEm	1983.41
Num	3	Q RAmdeg	1.9	Q DEmdeg	0.5	Q pmRA	1.9
Q pmDE	0.5	BTmag	15.060	E BTmag	0.738	VTmag	12.782
E VTmag	0.269	Prox	18	TYC		HIP
CCDM		RAdeg	329.46217194	DEdeg	-42.92089278	EpRA 1990	1.73
EpDE 1990	1.27	E RAdeg	75.6	E DEdeg	113.0	Posflg	D
Corr	0.0