18218+2130 BU 641 (HD 169031)

18^h 21^m 48.44^s +21° 30' 27.9" P.A. 341.00 sep 0.8 mag 7.03,8.66 Sp B9.5II dist. 264.55 pc (862.96 l.y.)

Coord 2000	18218+2130	Discov num	BU 641	Comp		Coord arcsec 2000	18 21 48.44 +21 30 27.9
Date first	1878	Date last	2015	Obs	81
Pa first	351	Pa last	341.3	P.A. Now (θ)	341.3°
Sep first	1.0	Sep last	0.78	Sep. Now (ρ)	0.78"
Mag pri	7.03	Mag sec	8.66	delta mag (ΔM)	1.63	Spectral class	B9.5II (blue-white)
Pri motion ra	-003	Sec motion ra	-003
Pri motion dec	-011	Sec motion dec	-011
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 169031	Constellation	Hercules	SAO	85969	HIP	89999
Tycho2	1580-01652-1	Gaia DR2	4528879465585626752	HD	169031	GC	25069
ADS	11287	BD	BD+21 3400	Distance	264.55	Distance ly	862.96

WDS 18218+2130 BU 641 (HD 169031) : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
Bu_1873a	Ma -	Burnham, S.W. (BU 1 - 81)	1873MNRAS..33..351B
Bu_1873a		MNRAS 33, 351, 1873
Bu_1873b	Ma -	Burnham, S.W. (BU 82 - 106)	1873MNRAS..33..437B
Bu_1873b		MNRAS 33, 437, 1873
Bu_1873c	-	Burnham, S.W.	1873MNRAS..33..567B
Bu_1873c		MNRAS 33, 567, 1873
Bu_1873d	Ma -	Burnham, S.W. (BU 107 - 182)	1873MNRAS..34...59B
Bu_1873d		MNRAS 34, 59, 1873
Bu_1874a	Ma -	Burnham, S.W. (BU 183 - 229)	1874MNRAS..34..382B
Bu_1874a		MNRAS 34, 382, 1874
Bu_1874b	Ma -	Burnham, S.W. (BU 230 - 300)	1874MNRAS..35...31B
Bu_1874b		MNRAS 35, 31, 1874
Bu_1874c	-	Burnham, S.W.	1874MNRAS..34..370B
Bu_1874c		MNRAS 34, 370, 1874
Bu_1874d	Ma -	Burnham, S.W.	1874MNRAS..34..393B
Bu_1874d		MNRAS 34, 393, 1874
Bu_1874e	Ma -	Burnham, S.W.	1874MNRAS..35...28B
Bu_1874e		MNRAS 35, 28, 1874
Bu_1875	Ma -	Burnham, S.W. (BU 301 - 390)	1875AN.....86..337B
Bu_1875		AN 86, 337, 1875
Bu_1876	Ma -	Burnham, S.W. (BU 391 - 436)	1876AN.....88..225B
Bu_1876		AN 88, 225, 1876
Bu_1876b	-	Burnham, S.W.	1876MNRAS..36...99B
Bu_1876b		MNRAS 36, 99, 1876
Bu_1876c	-	Burnham, S.W.	1876MNRAS..36..331B
Bu_1876c		MNRAS 36, 331, 1876 (no new data)
Bu_1877	Ma -	Burnham, S.W. (BU 453 - 482)	1877MNRAS..38...78B
Bu_1877		MNRAS 38, 78, 1877
Bu_1878a	Ma -	Burnham, S.W.	1878MNRAS..38..408B
Bu_1878a		MNRAS 38, 408, 1878
Bu_1878b	-	Burnham, S.W.	1878MNRAS..38..476B
Bu_1878b		MNRAS 38, 476, 1878
Bu_1878c	-	Burnham, S.W.	1878MNRAS..38..478B
Bu_1878c		MNRAS 38, 478, 1878
Bu_1878d	Ma j	Burnham, S.W.	1878AN.....92..235B
Bu_1878d		AN 92, 235, 1878
Bu_1879	Ma j	Burnham, S.W.	1879MmRAS..44..141B
Bu_1879		MemRAS 44, 141, 1879
Bu_1879B	Ma -	Burnham, S.W.	1879Obs.....3...20G
Bu_1879B		cited by Gledhill (Obs 3, 20, 1879)
Bu_1879C	Ma -	Burnham, S.W.	1879Obs.....3..142G
Bu_1879C		cited by Gledhill (Obs 3, 142, 1879)
Bu_1879d	Ma -	Burnham, S.W.	1879Obs.....3...92B
Bu_1879d		Obs 3, 92, 1879
Bu_1879e	Ma -	Burnham, S.W.	1879MNRAS..40...99B
Bu_1879e		MNRAS 40, 99, 1879
Bu_1880A	Ma -	Burnham, S.W.	1880Obs.....3..508G
Bu_1880A		cited by Gledhill (Obs 3, 508, 1880)
Bu_1880C	Ma -	Burnham, S.W.	1880Obs.....3..314G
Bu_1880C		cited by Gledhill (Obs 3, 314, 1880)
Bu_1880D	Ma -	Burnham, S.W.	1880Obs.....3..352G
Bu_1880D		cited by Gledhill (Obs 3, 352, 1880)
Bu_1880e	Ma -	Burnham, S.W.	1880Obs.....3..408B
Bu_1880e		Obs 3, 408, 1880
Bu_1880f	Ma -	Burnham, S.W.	1880MNRAS..40..497B
Bu_1880f		MNRAS 40, 497, 1880
Bu_1880g	Ma -	Burnham, S.W.	1880MNRAS..41...33B
Bu_1880g		MNRAS 41, 33, 1880
Bu_1881	Ma j	Burnham, S.W.	1881Obs.....4...19G
Bu_1881		cited by Gledhill (Obs 4, 19, 1881)
Bu_1882a	Ma -	Burnham, S.W. (BU 776 - 863)	1882PWasO...1...91B
Bu_1882a		Pub. Washburn Obs. 1, 91, 1882
Bu_1882b	Ma -	Burnham, S.W.	1882PWasO...1..113B
Bu_1882b		Pub. Washburn Obs. 1, 113, 1882
Bu_1883	Ma j	Burnham, S.W. (BU 864 - 1025)	1883MmRAS..47..167B
Bu_1883		MemRAS 47, 167, 1883
Bu_1883b	Ma -	Burnham, S.W.	1883MNRAS..43..318B
Bu_1883b		MNRAS 43, 318, 1883
Bu_1884	Ma j	Burnham, S.W.	1884MNRAS..44..365H
Bu_1884		MNRAS 44, 365, 1884
Bu_1884b	Ma -	Burnham, S.W.	1884AN....110..133B
Bu_1884b		AN 110, 133, 1884
Bu_1884C	Ma -	Burnham, S.W.	1884AReg...22..216S
Bu_1884C		cited by Sadler (Astr. Register 22, 216, 1884)
Bu_1887	Ma -	Burnham, S.W. (BU 734 - 775)	1887PLicO...1...24B
Bu_1887		Pub. Lick Obs. 1, 24,45, 1887
Bu_1889a	Ma -	Burnham, S.W.	1889AN....122..159B
Bu_1889a		AN 122, 159, 1889 (measures also in Bu_1894c)	1894PLicO...2..197B
Bu_1889b	Ma -	Burnham, S.W. (BU 1026 - 1038)	1889AN....123....1B
Bu_1889b		AN 123, 1, 1889 (measures also in Bu_1894a)	1894PLicO...2..185B
Bu_1889c	Ma -	Burnham, S.W.	1889AN....123...75B
Bu_1889c		AN 123, 75, 1889 (measures also in Bu_1894c)	1894PLicO...2..197B
Bu_1889d	Ma -	Burnham, S.W.	1889PASP....1...36B
Bu_1889d		PASP 1, 36, 1889 (measures also in Bu_1894)	1894PLicO...2....3B
Bu_1889e	Ma j	Burnham, S.W.	1889AN....121...63B
Bu_1889e		AN 121, 63, 1889 (measures also in Bu_1894c)	1894PLicO...2..197B
Bu_1889f	Ma j	Bunham, S.W.	1889MNRAS..49..418B
Bu_1889f		MNRAS 49, 418, 1889
Bu_1890a	Ma -	Burnham, S.W. (BU 1093 - 1154)	1889AN....124...49B
Bu_1890a		AN 124, 49, 1890 (measures also in Bu_1894c)	1894PLicO...2..197B
Bu_1890b	Ma -	Burnham, S.W.	1890AN....125...41B
Bu_1890b		AN 125, 41, 1890 (measures also in Bu_1894)	1894PLicO...2....3B
Bu_1890c	Ma -	Burnham, S.W.	1890PASP....2..138B
Bu_1890c		PASP 2, 138, 1890 (measures also in Bu_1894)	1894PLicO...2....3B
Bu_1891a	orb -	Burnham, S.W.	1891SidM...10..273B
Bu_1891a		Sidereal Messenger 10, 273, 1891
Bu_1891b	orb -	Burnham, S.W.	1891Obs....14..263B
Bu_1891b		Observatory 14, 263, 1891
Bu_1891c	Ma j	Burnham, S.W.	1891AN....127..289B
Bu_1891c		AN 127, 289, 1891
Bu_1892	Ma -	Burnham, S.W. (BU 1225 - 1266)	1892AN....130..257B
Bu_1892		AN 130, 257, 1892 (measures also in Bu_1894e)	1894PLicO...2..221B
Bu_1892b	Ma -	Burnham, S.W.	1892AN....130...77B
Bu_1892b		AN 130, 77, 1892
Bu_1893a	Ma -	Burnham, S.W.	1893AN....131..329B
Bu_1893a		AN 131, 329, 1893 (most measures also in Bu_1894)	1894PLicO...2.....B
Bu_1893b	orb -	Burnham, S.W.	1893MNRAS..53..478B
Bu_1893b		MNRAS 53, 478, 1893
Bu_1893c	orb -	Burnham, S.W.	1893MNRAS..54..119B
Bu_1893c		MNRAS 54, 119, 1893
Bu_1893d	orb -	Burnham, S.W.	1893AstAp..12..494B
Bu_1893d		AstAp 12, 494, 1893
Bu_1893e	orb -	Burnham, S.W.	1893AstAp..12..585B
Bu_1893e		AstAp 12, 585, 1893
Bu_1893f	Ma -	Burnham, S.W. (BU 1267 - 1274)	1893MNRAS..53..273B
Bu_1893f		MNRAS 53, 273, 1893 (most measures also in Bu_1893a)	1893AN....131..329B
Bu_1893g	orb -	Burnham, S.W.	1893MNRAS..53..482B
Bu_1893g		MNRAS 53, 482, 1893
Bu_1894	Ma j	Burnham, S.W.	1894PLicO...2....3B
Bu_1894		Pub. Lick Obs. 2, 3, 1894 (includes most data from Bu_1893a)	1893AN....131..329B
Bu_1894a	Ma j	Burnham, S.W. (BU 1026 - 1038)	1894PLicO...2..185B
Bu_1894a		Pub. Lick Obs. 2, 185, 1894
Bu_1894b	Ma j	Burnham, S.W. (BU 1039 - 1092)	1894PLicO...2..188B
Bu_1894b		Pub. Lick Obs. 2, 188, 1894
Bu_1894c	Ma -	Burnham, S.W. (BU 1093 - 1154)	1894PLicO...2..197B
Bu_1894c		Pub. Lick Obs. 2, 197, 1894
Bu_1894d	Ma -	Burnham, S.W. (BU 1155 - 1224)	1894PLicO...2..206B
Bu_1894d		Pub. Lick Obs. 2, 206, 1894
Bu_1894e	Ma -	Burnham, S.W. (BU 1225 - 1266)	1894PLicO...2..221B
Bu_1894e		Pub. Lick Obs. 2, 221, 1894
Bu_1894f	Ma -	Burnham, S.W. (BU 1267 - 1274)	1894PLicO...2..229B
Bu_1894f		Pub. Lick Obs. 2, 229, 1894 (all measures also in Bu_1893f)	1893MNRAS..53..273B
Bu_1894g	Ma -	Burnham, S.W.	1894PLicO...2..159B
Bu_1894g		Pub. Lick Obs. 2, 159, 1894
Bu_1898	orb -	Burnham, S.W.	1898MNRAS..59...59B
Bu_1898		MNRAS 58, 59, 1898
Bu_1900	Ma -	Burnham, S.W.	1900PYerO...1....1B
Bu_1900		Pub. Yerkes Obs. 1, 1, 1900
Bu_1902A	Ma j	Burnham, S.W.	1902AN....158..241E
Bu_1902A		cited by Espin (AN 158, 241, 1902)
Bu_1903	Ma -	Burnham, S.W.	1903PYerO...2....1B
Bu_1903		Pub. Yerkes Obs. 2, 1, 1903
Bu_1906	Ma j	Burnham, S.W.	1906QB821.B972.....
Bu_1906	+M	Burnham Double Star Cat., 1906
Bu_1906B	Ma -	Burnham, S.W.	1906MmRAS..56....1L
Bu_1906B	+orb	cited by Lewis (MemRAS 56, 1, 1906)
Bu_1907	Ma -	Burnham, S.W.	1907AN....176..129B
Bu_1907		AN 176, 129, 1907 (most data in Bu_1913)	1913QB811.B8.......
Bu_1908	Ma -	Burnham, S.W.	1908MNRAS..68..517B
Bu_1908		MNRAS 68, 517, 1908
Bu_1908A	Ma -	Burnham, S.W.	1908MNRAS..68..465B
Bu_1908A		cited by Barnard (MNRAS 68, 465, 1908)
Bu_1909	Ma -	Burnham, S.W.	1909AN....180...65B
Bu_1909		AN 180, 65, 1909 (most data in Bu_1913)	1913QB811.B8.......
Bu_1909b	Ma j	Burnham, S.W.	1909AN....182..133B
Bu_1909b		AN 182, 133, 1909
Bu_1910	Ma -	Burnham, S.W.	...................
Bu_1910		Journal Astronomique 1, no. 11, 81, 1910
Bu_1910b	Ma -	Burnham, S.W.	1910AN....185..145B
Bu_1910b		AN 185, 145, 1910 (most data in Bu_1913)	1913QB811.B8.......
Bu_1911	-	Burnham, S.W.	1911MNRAS..72..156J
Bu_1911		MNRAS 72, 156, 1911
Bu_1911b	Ma j	Burnham, S.W.	1911AN....189..385B
Bu_1911b		AN 189, 385, 1911
Bu_1913	Ma j	Burnham, S.W.	1913QB811.B8.......
Bu_1913	+Pa	Carnegie Inst. Wash. #168, 1913
Bu_1913	+T
Bu_1918	Ma j	Burnham, S.W.	1918AJ.....31..141B
Bu_1918		AJ 31, 141, 1918
Bu_1923A	Ma -	Burnham, S.W.	1923MNRAS..83..154E
Bu_1923A		cited by Espin (MNRAS 83, 154, 1923)
Bu_1927A	Ma -	Burnham, S.W.	1927sdsc.book......
Bu_1927A		cited in SDS (Southern Double Star Cat.), 1927
Bu_1932A	Ma -	Burnham, S.W.	1932QB821.A43......
Bu_1932A		cited in ADS (Aitken Double Star Cat.), 1932
Bu_1963A	Ma -	Burnham, S.W.	1963icvd.book.....J
Bu_1963A		cited in IDS (Lick Index Cat.), 1963
Bu_2002A	Ma -	Burnham, S.W.	2002yCat.1275....0D
Bu_2002A		cited in CCDM

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18218+2130	BU 641		2004	74	341	0.8	7.03	8.66	B9.5II	D	182148.44+213027.9
18218+2130	BU 641		2010	77	340	0.8	7.03	8.66	B9.5II	D	182148.44+213027.9
18218+2130	BU 641		2011	79	342	0.8	7.03	8.66	B9.5II		182148.44+213027.9
18218+2130	BU 641		2015	80	341	0.8	7.03	8.66	B9.5II		182148.44+213027.9

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

WDS 18218+2130 BU 641 (HD 169031) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 18218+2130 BU 641 (HD 169031) : MEASURES

No records found.

WDS 18218+2130 (HD 169031) : 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 18218+2130 (HD 169031) : ALADIN DSS IMAGE @ 18^h 21^m 48.44^s +21° 30' 27.9"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 18218+2130 BU 641 (HD 169031) : 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		18218+2130	BU 641		341	0.8
Show		18208+2114	FUR 3		324	2.4	14
Show		18218+2115	FUR 4		32	3.1	16
Show		18206+2126	UC 3554		172	16.8	18
Show		18200+2120	AG 221	AB	12	1.8	27
Show		18200+2120	AG 221	AC	9	9.7	27
Show		18237+2146	STT 587	AB	323	238.0	31
Show		18237+2146	STG 7	AC	84	129.1	31
Show		18237+2146	TOK 60	Aa,Ab	280	0.0	31
Show		18203+2104	HDS2592		184	0.2	34
Show		18225+2056	AZC 104		274	33.6	36
Show		18227+2053	DAM 283		253	7.8	40
Show		18205+2055	COU 202		294	0.2	41
Show		18204+2048	WFC 206		45	9.4	47
Show		18248+2156	BRT2445		21	2.4	50
Show		18253+2116	TDT 850	AB	199	0.5	52
Show		18183+2114	LDS4784		61	121.3	53
Show		18223+2036	L 20		337	2.2	55
Show		18218+3038	L 21		91	7.1	56
Show		18216+2030	HO 430		194	2.5	61
Show		18225+2030	DAM 282		245	8.0	61
Show		18218+2023	DAM 281		75	10.5	68
Show		18241+2027	HO 652		352	33.2	71
Show		18245+2028	BU 1325		353	5.6	74
Show		18240+2023	CLZ 74		51	87.8	75
Show		18206+2248	STF2310		235	5.1	80
Show		18274+2152	CBL 170		160	26.6	82
Show		18162+2211	TDT 766		213	2.4	88
Show		18200+2257	SLE 155		70	10.9	91
Show		18173+2025	J 759		82	2.5	91
Show		18151+2136	LDS4780		206	124.5	94
Show		18252+2254	TDT 848		236	0.5	97
Show		18166+2022	KPP3329		203	1.5	101
Show		18144+2127	HJ 2828		109	16.4	104
Show		18190+2307	POU3384		76	9.0	105
Show		18142+2127	BIG 2		140	34.5	107
Show		18163+2016	HO 269		152	8.9	107
Show		18293+2144	J 2913	AB	117	3.2	107
Show		18293+2144	J 2913	AC	158	15.5	107
Show		18155+2030	RAO 385		87	0.8	107
Show		18165+2249	HU 319	AB	125	0.3	109
Show		18165+2249	HU 319	AC	201	2.8	109
Show		18244+2314	BRT2444		259	3.5	110
Show		18273+2012	TDS 922		206	2.4	111
Show		18293+2052	TDT 904		223	0.7	112
Show		18299+2141	TDS 926		253	0.9	113
Show		18258+1952	BRT2446	AB	323	3.4	114
Show		18258+1952	BRT2446	AC	256	8.0	114
Show		18227+2323	POU3395		184	7.2	114
Show		18172+1955	TDT 775		156	0.9	116
Show		18212+2326	POU3391		326	10.7	116

WDS 18218+2130 : COMPONENTS

	A
B	pa=342.5° sep=0.77"

18218+2130 A

Componente originario normalizzato	AB	Name	HD 169031	Coord arcsec 2000	182148.44+213027.9	Mag	7.03
Spectral class	B9.5II (blue-white)	PmRA	-3.00	PmDE	-11.0	SAO	85969
HIP	89999	Tycho2	1580-01652-1	HD	169031	GC	25069
ADS	11287	BD	BD+21 3400

Tycho2

Tycho2	1580-01652-1	Pflag		RAmdeg	275.45184342	DEmdeg	21.50778220
PmRA	-2.9	PmDE	-10.6	E RAmdeg	4	E DEmdeg	4
E pmRA	1.2	E pmDE	1.1	EpRAm	1991.05	EpDEm	1991.39
Num	13	Q RAmdeg	1.0	Q DEmdeg	1.2	Q pmRA	1.0
Q pmDE	1.2	BTmag	6.780	E BTmag	0.014	VTmag	6.876
E VTmag	0.010	Prox	999	TYC	T	HIP	89999
CCDM	AB	RAdeg	275.45185111	DEdeg	21.50780667	EpRA 1990	1.26
EpDE 1990	1.62	E RAdeg	3.7	E DEdeg	3.5	Posflg	P
Corr	0.1

SAO

SAO	85969	DelFlag		RA1950		PmRA1950	-0.0007
DE1950		PmDE1950	-0.004	Vmag	6.6	SpType	B8
Double code		Source	70	CatNum	25069	DM	BD+21 3400
DMcomp		BDsup		HD	169031	M HD	0
GC	25069	RA1950rad	4.79826419	DE1950rad	0.37494503	PmRA2000	-0.0006
PmDE2000	-0.004

Hipparcos

Catalog	H	HIP	89999	Proxy	H	RAhms	18 21 48.45
DEdms	+21 30 28.0	Vmag	6.83	VarFlag	1	R Vmag	H
RAdeg	275.452	DEdeg	21.5078	AstroRef	A	Plx	2.36
CCDM	18218+2130	N CCDM	I	Nsys	1	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	AB
Theta	342	Rho	0.829	HD	169031	BD	BD+21 3400
CD		CP		Dm number	+21 3400	VIred	-0.07
SpType	B8	R SpType		Coord arcsec 2000	182148.45+213028.0

Hipparcos 2

HIP	89999	Sn	15	So	3	Nc	2
RArad	4.807541847	DErad	0.3753817272	Plx	3.78	PmRA	-1.21
PmDE	-6.82	E RArad	0.37	E DErad	0.47	E Plx	0.66
E pmRA	0.39	E pmDE	0.51	Hpmag	6.8073	E Hpmag	0.0013
SHp	0.012	VA	1	BV	-0.09	E BV	0.005
VI	-0.07

CCDM

Ccdm	18218+2130	RComp		Comp	A	Note1
Note2		Discov num		DRAs	0.44	DDEs	28.5
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	6.8	Sp	B8	PmNote	*
PmRA	1	PmDE	4	Dm number	+21 3400	Cat1	BD
Name2	+21 1824	Cat2	AGK2/3	HD	169031	M HD
ADS BDS	A11287	M ADS BDS		N IDS		IDS	18176N2128A
HIC	89999

18218+2130 B

Componente originario normalizzato	AB		Coord arcsec 2000	182148.42+213028.6		Mag	8.66		PmRA	-3.00
PmDE	-11.0		Calc delta mag	1.63		Calc coord	yes

CCDM

Ccdm	18218+2130	RComp		Comp	B	Note1
Note2		Discov num	BU 641	DRAs		DDEs
R dRAs		Year	1956	Theta	342	Rho	0.9
Obs	32	Vmag	8.7	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A11287	M ADS BDS		N IDS		IDS	18176N2128B
HIC	89999