18087-1756 TDT 706 Aa,Ab

18^h 08^m 40.05^s -17° 55' 59.9" P.A. 98.00 sep 0.8 mag 11.16,11.82 Sp G0

Coord 2000	18087-1756	Discov num	TDT 706	Comp	Aa,Ab	Coord arcsec 2000	18 08 40.05 -17 55 59.9
Date first	1991	Date last	1991	Obs	1
Pa first	98	Pa last	97.8	P.A. Now (θ)	97.8°
Sep first	0.8	Sep last	0.83	Sep. Now (ρ)	0.83"
Mag pri	11.16	Mag sec	11.82	delta mag (ΔM)	0.66	Spectral class	G0 (yellow)
Pri motion ra	+000	Sec motion ra	+000
Pri motion dec	+001	Sec motion dec	+001
Notes

Nature of this double is uncertain.

18087-1756 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			18 08 40 -17 55 60	TDT 706 Aa,Ab	1991	1	98	0.8	11.16	11.82	0.66		<===
Show	HD 312621		18 08 40 -17 55 60	ARA 266 AB	2007	7	125	11.9	10.73	12.20	1.47

Triple system
2 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation

Sagittarius

Tycho2

6268-00716-1

Gaia DR2

4095861481278828672

312621

WDS 18087-1756 TDT 706 Aa,Ab : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
Ara1961	Pa -	Aravamudan, S.	1961PASP...73..266A
Ara1961		PASP 73, 266, 1961
Ara1963	Pa -	Aravamudan, S.	.
Ara1963		Pub. Nizamiah Obs. 13, Pt.3, 1963

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18087-1756	TDT 706	Aa,Ab	1991	1	98	0.8	11.16	11.82			180840.05-175559.9

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WDS 18087-1756 TDT 706 Aa,Ab : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 18087-1756 TDT 706 Aa,Ab : MEASURES

No records found.

WDS 18087-1756 : VIRTUAL EYEPIECE

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Pass over with the mouse cursor to display the catalog designation.

WDS 18087-1756 : ALADIN DSS IMAGE @ 18^h 08^m 40.05^s -17° 55' 59.9"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 18087-1756 TDT 706 Aa,Ab : 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		18087-1756	TDT 706	Aa,Ab	98	0.8
Show		18087-1756	ARA 266	AB	125	11.9
Show		18090-1815	ARA 454		349	14.6	20
Show		18086-1823	GAU9002		125	26.8	27
Show		18094-1822	FEN 26		46	5.0	29
Show		18105-1745	J 2197	AB	109	72.6	29
Show		18090-1825	HJ 2819		113	23.3	30
Show		18105-1745	J 2197	BC	82	6.2	30
Show		18089-1827	ARA 453		57	8.8	32
Show		18093-1827	ARA 455		97	11.5	32
Show		18115-1807	ARA 457		3	14.3	42
Show		18095-1712	SKF 94	AB	243	4.6	46
Show		18095-1712	SKF 94	AC	279	6.2	46
Show		18079-1709	ARA 265		326	14.2	49
Show		18112-1723	RST3161		241	0.4	49
Show		18099-1710	ARA 267		348	14.7	50
Show		18082-1847	ARA 452		263	12.5	52
Show		18118-1825	HJ 2820	BC	87	18.5	52
Show		18118-1825	HJ 2820	AB	279	5.8	52
Show		18118-1825	HJ 2820	AC	82	12.9	52
Show		18066-1712	HJ 2818		139	17.7	54
Show		18108-1709	HU 195	AB	71	1.3	56
Show		18108-1709	HJ 593	AC	312	19.8	56
Show		18078-1852	ARA 451		182	7.7	58
Show		18126-1804	ARA 461		313	10.8	58
Show		18084-1856	AOT 70	CD	286	35.5	61
Show		18084-1856	I 625	AB	44	1.8	61
Show		18084-1856	AOT 69	AB,C	92	16.8	61
Show		18084-1856	AOT 70	AB,D	299	19.6	61
Show		18103-1700	ARA 268		304	14.0	62
Show		18072-1854	STN 41	A,BC	211	29.8	62
Show		18072-1854	A 2259	BC	202	1.3	62
Show		18089-1901	ARA 731		224	6.3	66
Show		18130-1819	TDT 739		253	2.2	66
Show		18067-1859	HJ 592		206	36.6	69
Show		18133-1817	ARA 462		343	14.8	70
Show		18124-1840	KPP4092		335	1.6	70
Show		18120-1852	OCC9177		-1	0.0	74
Show		18125-1847	ARA 460		86	13.7	75
Show		18140-1801	TDT 754		91	0.5	76
Show		18106-1645	S 700	AB	291	18.8	77
Show		18106-1645	S 700	AC	353	28.6	77
Show		18106-1645	ABH 94	AD	348	47.7	77
Show		18106-1645	ABH 94	AE	65	58.0	77
Show		18106-1645	ABH 94	AF	49	99.2	77
Show		18106-1645	S 700	AG	297	35.6	77
Show		18039-1832	ARA 450		66	8.0	77
Show		18125-1852	VAT 2		86	7.6	78
Show		18077-1913	ARA 729		343	13.1	79
Show		18046-1702	HU 194		297	0.4	80
Show		18080-1637	RST3996		90	0.2	80

WDS 18087-1756 : COMPONENTS

	A	Ab
Ab	pa=98.2° sep=0.79"
B	pa=126.4° sep=11.48"	pa=128.3° sep=10.79"

18087-1756 A

Name	HD 312621		Coord arcsec 2000	180840.05-175559.9		Mag	10.73		Spectral class	G0 (yellow)
PmRA	-2.00		PmDE	3.0		Tycho2	6268-00716-1		HD	312621

Tycho2

Tycho2	6268-00716-1	Pflag		RAmdeg	272.16692875	DEmdeg	-17.93330539
PmRA	0.0	PmDE	0.9	E RAmdeg	41	E DEmdeg	34
E pmRA	2.4	E pmDE	2.5	EpRAm	1986.93	EpDEm	1981.85
Num	5	Q RAmdeg	2.7	Q DEmdeg	1.6	Q pmRA	2.7
Q pmDE	1.6	BTmag	11.860	E BTmag	0.099	VTmag	10.725
E VTmag	0.066	Prox	938	TYC		HIP
CCDM		RAdeg	272.16691639	DEdeg	-17.93331083	EpRA 1990	1.86
EpDE 1990	1.80	E RAdeg	44.0	E DEdeg	55.8	Posflg
Corr	0.0

CCDM

Ccdm	18087-1756	RComp		Comp	A	Note1
Note2		Discov num		DRAs	-2.06	DDEs	-0.3
R dRAs	56	Year		Theta		Rho
Obs	2	Vmag	11.7	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS		M ADS BDS		N IDS		IDS	18028S1757A
HIC

18087-1756 Ab

Coord arcsec 2000	180840.10-175600.0		Mag	11.82		PmRA	0.00		PmDE	1.0
Calc delta mag	0.66		Calc coord	yes

18087-1756 B

Coord arcsec 2000	180840.70-175606.7		Mag	12.2		PmRA	-1.00		PmDE	-4.0
Calc delta mag	1.04		Calc coord	yes

CCDM

Ccdm	18087-1756	RComp		Comp	B	Note1
Note2		Discov num	ARA 266	DRAs	-1.38	DDEs	-7.2
R dRAs	56	Year	1916	Theta	121	Rho	11.9
Obs	1	Vmag	13.2	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS		M ADS BDS		N IDS		IDS	18028S1757B
HIC