21426+1900 HO 165 (HD 206580)

21^h 42^m 34.56^s +18° 59' 37.2" P.A. 63.00 sep 0.8 mag 8.99,9.19 Sp A2

Coord 2000	21426+1900	Discov num	HO 165	Comp		Coord arcsec 2000	21 42 34.56 +18 59 37.2
Date first	1886	Date last	2016	Obs	53
Pa first	63	Pa last	62.7	P.A. Now (θ)	62.7°
Sep first	0.4	Sep last	0.821	Sep. Now (ρ)	0.821"
Mag pri	8.99	Mag sec	9.19	delta mag (ΔM)	0.2	Spectral class	A2 (white)
Pri motion ra	+012	Sec motion ra	+012
Pri motion dec	-008	Sec motion dec	-008
Notes	N (See Notes)

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 206580		Constellation	Pegasus		SAO	107341		Tycho2	1673-00866-1
Gaia DR2	1786384032070654336		HD	206580

WDS 21426+1900 HO 165 (HD 206580) : NOTES

discov_num	notes	refcode
HO 165	An 1899 measure by Lewis was erroneously listed as the AC components	L__1899a
	under the designation L 50. It actually was a measure of STF2818.
	A 1999 measure by Mason et al. was erroneously listed under the pair	WSI2000b
	21420+1856LBU 2Aa,Ab, the A component of STF2818.

REFERENCES

refcode	metd	author	reference
L__1899a	Ma j	Lewis, T.	1899RGOO...........
L__1899a		Greenwich Observations, 1899 (data also in MNRAS 60, 494, 1900)	1900MNRAS..60..494.
WSI2000b	Su j	Mason, B.D., Hartkopf, W.I., Holdenried, E.R., Rafferty, T.J., Wycoff, G.L.,	2000AJ....120.1120M
WSI2000b		Hennessy, G.S., Hall, D.M., Urban, S.E., et al.
WSI2000b		AJ 120, 1120, 2000

DISCOVERER

idgroup	discov	author
1	HO	Hough, G.W.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21426+1900	HO 165		2005	44	61	0.7	8.99	9.19	A2	N	214234.56+185937.2
21426+1900	HO 165		2009	47	64	0.7	8.99	9.19	A2	N	214234.56+185937.2
21426+1900	HO 165		2010	49	62	0.7	8.99	9.19	A2	N	214234.56+185937.2
21426+1900	HO 165		2016	50	63	0.8	8.99	9.19	A2	N	214234.56+185937.2

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

WDS 21426+1900 HO 165 (HD 206580) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 21426+1900 HO 165 (HD 206580) : MEASURES

No records found.

WDS 21426+1900 (HD 206580) : 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 21426+1900 (HD 206580) : ALADIN DSS IMAGE @ 21^h 42^m 34.56^s +18° 59' 37.2"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 21426+1900 HO 165 (HD 206580) : 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		21426+1900	HO 165		63	0.8
Show		21420+1856	LBU 2	Aa,Ab	22	0.6	9
Show		21420+1856	STF2818	AB	24	26.8	9
Show		21420+1856	FOX9055	AC	267	76.5	9
Show		21420+1856	DAM 16	CD	90	3.5	11
Show		21429+1843	SLW1251		328	123.9	18
Show		21409+1915	HDS3086		66	1.1	29
Show		21399+1914	COU 330		190	0.5	41
Show		21419+1949	CBL 533		123	64.8	51
Show		21385+1902	TDT3077	AB	294	0.4	58
Show		21385+1902	SKF 292	AB,C	91	16.2	58
Show		21384+1858	TDT3075		250	1.0	60
Show		21466+1929	COU 431		184	0.5	64
Show		21403+1955	SLW1246		345	155.2	65
Show		21451+1954	RAO 466		249	0.6	65
Show		21427+1751	DAM 660		318	0.8	69
Show		21424+1750	HU 373	AB	300	0.9	70
Show		21424+1750	BU 691	AC	249	84.3	70
Show		21424+1750	BU 691	AE	80	118.8	70
Show		21424+1750	FOX9057	CD	238	14.7	71
Show		21426+1749	CBL 95		222	37.1	72
Show		21399+2005	UC 4521		35	12.3	76
Show		21461+2001	HU 376		14	1.4	80
Show		21368+1858	TDT3062		151	0.6	83
Show		21479+1824	BPM2409		309	97.5	84
Show		21368+1915	BRT2498		268	5.0	85
Show		21417+1735	OSO 153		206	18.4	86
Show		21362+1912	TDT3052		197	1.7	92
Show		21420+1728	KPP3372		244	2.0	93
Show		21477+1755	LDS4909		66	32.7	99
Show		21391+2036	STT 444		277	8.0	109
Show		21397+2041	GMC 23		342	10.5	109
Show		21433+2046	J 852		92	4.2	110
Show		21349+1923	TDT3041		350	0.8	112
Show		21393+2043	STT 445		120	1.0	114
Show		21440+1705	LDS6358		346	64.1	119
Show		21417+2100	UC 4531		213	69.8	121
Show		21505+1953	LDS4916		298	198.7	124
Show		21344+1816	BPM2393		24	94.5	124
Show		21427+2102	J 614		307	2.0	125
Show		21347+1953	TDT3040		23	0.9	125
Show		21514+1916	WSI 24		24	14.2	126
Show		21457+2100	UC 4553		184	63.7	129
Show		21517+1918	BU 1506	BC	118	29.9	131
Show		21517+1918	STF2834	AB	298	4.3	131
Show		21517+1918	BU 1506	AC	116	29.7	131
Show		21356+1731	BPM2398		96	82.6	134
Show		21359+1723	BPM2399		230	92.5	136
Show		21516+1950	HJ 947	AB	98	18.9	137
Show		21516+1950	HJ 947	AC	310	24.3	137
Show		21516+1950	HJ 947	BC	297	41.1	137

WDS 21426+1900 : COMPONENTS

	A
B	pa=61.4° sep=0.79"

21426+1900 A

Componente originario normalizzato	AB	Name	HD 206580	Coord arcsec 2000	214234.56+185937.2	Mag	8.99
Spectral class	A2 (white)	PmRA	12.00	PmDE	-8.0	SAO	107341
Tycho2	1673-00866-1	HD	206580	DM	BD+18 4844

Tycho2

Tycho2	1673-00866-1	Pflag		RAmdeg	325.64404450	DEmdeg	18.99367434
PmRA	12.3	PmDE	-7.7	E RAmdeg	7	E DEmdeg	7
E pmRA	1.2	E pmDE	1.2	EpRAm	1991.06	EpDEm	1991.12
Num	9	Q RAmdeg	0.7	Q DEmdeg	1.0	Q pmRA	0.7
Q pmDE	1.0	BTmag	8.772	E BTmag	0.017	VTmag	8.468
E VTmag	0.013	Prox	999	TYC	T	HIP
CCDM		RAdeg	325.64401417	DEdeg	18.99369194	EpRA 1990	1.68
EpDE 1990	1.74	E RAdeg	6.6	E DEdeg	6.7	Posflg	P
Corr	-0.3

SAO

SAO	107341	DelFlag		RA1950		PmRA1950	0.0015
DE1950		PmDE1950	-0.001	Vmag	8	SpType	A2
Double code		Source	28	CatNum	8849	DM	BD+18 4844
DMcomp		BDsup		HD	206580	M HD	0
GC		RA1950rad	5.67332104	DE1950rad	0.32750997	PmRA2000	0.0015
PmDE2000	-0.004

CCDM

Ccdm	21426+1900	RComp		Comp	A	Note1
Note2		Discov num		DRAs	-1.52	DDEs	-22.2
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	9.9	Sp	A2	PmNote	*
PmRA	3	PmDE	1	Dm number	+18 4844	Cat1	BD
Name2	+18 2211	Cat2	AGK2/3	HD	206580	M HD
ADS BDS	A15234	M ADS BDS		N IDS		IDS	21379N1832A
HIC

21426+1900 B

Componente originario normalizzato	AB		Coord arcsec 2000	214234.61+185937.6		Mag	9.19		PmRA	12.00
PmDE	-8.0		Calc delta mag	0.2		Calc coord	yes

CCDM

Ccdm	21426+1900	RComp		Comp	B	Note1
Note2		Discov num	HO 165	DRAs		DDEs
R dRAs		Year	1886	Theta	064	Rho	0.5
Obs	20	Vmag	10.1	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A15234	M ADS BDS		N IDS		IDS	21379N1832B
HIC