18359-4426 HDS 2638 (HD 171256)

18^h 35^m 54.42^s -44° 25' 44.7" P.A. 21.00 sep 7.3 mag 8.89,11.76 Sp B9IV/V dist. 1111.11 pc (3624.44 l.y.)

Coord 2000	18359-4426	Discov num	HDS2638	Comp		Coord arcsec 2000	18 35 54.42 -44 25 44.7
Date first	1905	Date last	2010	Obs	7
Pa first	28	Pa last	20.5	P.A. Now (θ)	20.5°
Sep first	10.2	Sep last	7.26	Sep. Now (ρ)	7.26"
Mag pri	8.89	Mag sec	11.76	delta mag (ΔM)	2.87	Spectral class	B9IV/V (blue-white)
Pri motion ra	+004	Sec motion ra	+002
Pri motion dec	-011	Sec motion dec	-012
Notes

rPM=0.184 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 171256	Constellation	Corona Austrina	SAO	229134	HIP	91162
Tycho2	7914-01215-1	Gaia DR2	6709875712599915648	HD	171256	GC	25375
CD	CD-4412727	CP	CP-44 9223	Distance	1111.11	Distance ly	3624.44

WDS 18359-4426 HDS 2638 (HD 171256) : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
HDS		Hipparcos Double Star (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
18359-4426	HDS2638		2000	5	22	7.6	8.89	11.76	B9IV/V	D	183554.42-442544.7
18359-4426	HDS2638		2010	7	21	6.7	8.89	11.76	B9IV/V		183554.42-442544.7

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

WDS 18359-4426 HDS 2638 (HD 171256) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 18359-4426 HDS 2638 (HD 171256) : MEASURES

No records found.

WDS 18359-4426 (HD 171256) : 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 18359-4426 (HD 171256) : ALADIN DSS IMAGE @ 18^h 35^m 54.42^s -44° 25' 44.7"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 18359-4426 HDS 2638 (HD 171256) : 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		18359-4426	HDS2638		21	7.3
Show		18364-4419	TSN 50		346	174.9	10
Show		18345-4433	BRT1065		155	5.3	17
Show		18366-4444	TDT 955		231	0.5	20
Show		18362-4402	BRT1068		141	1.8	24
Show		18387-4419	BRT1072		80	5.3	31
Show		18332-4413	CPO9269		317	4.0	32
Show		18341-4358	BRT1064		332	4.4	35
Show		18367-4500	CPO 594		234	5.0	36
Show		18325-4425	DON 908		229	2.3	37
Show		18310-4434	CPO 589		293	8.3	53
Show		18354-4522	UC 3621		63	50.4	57
Show		18414-4433	CBL 172		53	36.3	60
Show		18390-4336	BRT1073	AB	285	4.3	61
Show		18390-4336	DAM 113	AC	153	10.2	61
Show		18308-4358	DON 905		53	0.5	62
Show		18304-4448	UC 3597		132	75.2	63
Show		18312-4344	I 1369		238	4.3	66
Show		18417-4448	TDT1002		103	0.9	66
Show		18396-4520	UC 3632		138	46.6	67
Show		18297-4438	TOI1118		132	0.2	68
Show		18428-4416	LDS 649		240	130.4	75
Show		18312-4523	KPP4110		143	1.5	76
Show		18408-4330	DON 918		130	2.1	77
Show		18345-4542	I 1371		353	2.0	78
Show		18314-4322	CPO 81	AB	35	12.4	81
Show		18314-4322	CPO 81	AC	110	8.1	81
Show		18404-4320	SKF1149		22	42.5	82
Show		18417-4520	TDT1003		112	7.8	82
Show		18374-4551	DON 912		284	0.4	87
Show		18395-4545	HU 1527		313	5.0	88
Show		18312-4312	DAM 677		210	3.5	90
Show		18308-4542	UC 3599		295	8.0	94
Show		18309-4307	BRT1061		26	9.3	96
Show		18278-4507	BRT1057		44	7.2	97
Show		18351-4606	RST 992		118	0.3	102
Show		18287-4318	DON 903		149	1.2	104
Show		18385-4247	DON 915		211	2.5	104
Show		18290-4541	SKF1084		251	13.9	106
Show		18382-4240	CPO 595		17	3.9	109
Show		18334-4240	CPO 82	AB	45	5.9	110
Show		18334-4240	I 9020	AC	74	25.1	110
Show		18257-4412	DON 898		24	0.5	111
Show		18368-4233	CRI 20		92	8.4	114
Show		18424-4603	RST 998		332	1.1	119
Show		18320-4618	RSS 484		173	19.2	120
Show		18462-4520	DON 921		129	1.1	122
Show		18295-4243	DON 904		108	1.2	124
Show		18298-4241	BRT1059		23	2.7	124
Show		18366-4630	UC 3626		87	31.5	125
Show		18476-4430	KPP 425		329	4.9	126

WDS 18359-4426 : COMPONENTS

	A
B	pa=14.9° sep=7.04"

18359-4426 A

Componente originario normalizzato	AB	Name	HD 171256	Coord arcsec 2000	183554.42-442544.7	Mag	8.89
Spectral class	B9IV/V (blue-white)	PmRA	4.00	PmDE	-11.0	SAO	229134
HIP	91162	Tycho2	7914-01215-1	HD	171256	GC	25375
CD	CD-4412727	CP	CP-44 9223

Tycho2

Tycho2	7914-01215-1	Pflag		RAmdeg	278.97673022	DEmdeg	-44.42909094
PmRA	3.4	PmDE	-12.6	E RAmdeg	8	E DEmdeg	9
E pmRA	1.1	E pmDE	1.3	EpRAm	1990.46	EpDEm	1990.77
Num	8	Q RAmdeg	1.6	Q DEmdeg	0.7	Q pmRA	1.7
Q pmDE	0.6	BTmag	8.809	E BTmag	0.018	VTmag	8.887
E VTmag	0.017	Prox	78	TYC	T	HIP	91162
CCDM	A	RAdeg	278.97671889	DEdeg	-44.42906194	EpRA 1990	1.76
EpDE 1990	1.74	E RAdeg	7.8	E DEdeg	8.7	Posflg
Corr	-0.1

SAO

SAO	229134	DelFlag		RA1950		PmRA1950	0.0014
DE1950		PmDE1950	0.006	Vmag	9.1	SpType	B9
Double code		Source	70	CatNum	25375	DM	CD-4412727
DMcomp	A	BDsup		HD	171256	M HD	0
GC	25375	RA1950rad	4.85316905	DE1950rad	-0.77614766	PmRA2000	0.0014
PmDE2000	0.004

Hipparcos

Catalog	H	HIP	91162	Proxy	H	RAhms	18 35 54.41
DEdms	-44 25 44.6	Vmag	9.32	VarFlag		R Vmag	G
RAdeg	278.977	DEdeg	-44.4291	AstroRef	A	Plx	-0.9
CCDM	18359-4426	N CCDM	H	Nsys	1	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	AB
Theta	22	Rho	7.854	HD	171256	BD
CD	CD-4412727	CP	CP-44 9223	Dm number	-4412727	VIred	0.73
SpType	B9IV/V	R SpType		Coord arcsec 2000	183554.41-442544.6

Hipparcos 2

HIP	91162	Sn	15	So	3	Nc	2
RArad	4.8690622693	DErad	-0.7754334063	Plx	0.9	PmRA	1.11
PmDE	-7.74	E RArad	0.93	E DErad	0.71	E Plx	1.15
E pmRA	1.18	E pmDE	0.83	Hpmag	8.7881	E Hpmag	0.003
SHp	0.02	VA	0	BV	0.665	E BV	0.015
VI	0.15

CCDM

Ccdm	18359-4426	RComp		Comp	A	Note1
Note2		Discov num		DRAs	0.41	DDEs	15.3
R dRAs	82	Year		Theta		Rho
Obs	2	Vmag	8.9	Sp	B9	PmNote	*
PmRA	6	PmDE	-8	Dm number	-4412727	Cat1	CD
Name2	229134	Cat2	SAO	HD	171256	M HD
ADS BDS		M ADS BDS		N IDS		IDS
HIC	91162

18359-4426 B

Componente originario normalizzato	AB		Coord arcsec 2000	183554.59-442537.9		Mag	11.76		PmRA	2.00
PmDE	-12.0		Calc delta mag	2.87		Calc coord	yes

CCDM

Ccdm	18359-4426	RComp		Comp	B	Note1
Note2		Discov num	HDS	DRAs	0.69	DDEs	22.6
R dRAs	82	Year	1991	Theta	22	Rho	7.9
Obs	1	Vmag	11.8	Sp		PmNote	*
PmRA	6	PmDE	-8	Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS		M ADS BDS		N IDS		IDS
HIC	91162