11303+8102 STF 1539 (HD 99687)

11^h 30^m 18.10^s +81° 02' 14.3" P.A. 313.00 sep 19.4 mag 8.49,9.85 Sp F8 dist. 78.19 pc (255.06 l.y.)

Coord 2000	11303+8102	Discov num	STF1539	Comp		Coord arcsec 2000	11 30 18.10 +81 02 14.3
Date first	1823	Date last	2016	Obs	27
Pa first	313	Pa last	312.6	P.A. Now (θ)	312.6°
Sep first	21.9	Sep last	19.416	Sep. Now (ρ)	19.416"
Mag pri	8.49	Mag sec	9.85	delta mag (ΔM)	1.36	Spectral class	F8 (yellow-white)
Pri motion ra	+036	Sec motion ra	+033
Pri motion dec	+026	Sec motion dec	+025
Notes	N (See Notes)

rPM=0.071 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 99687	Constellation	Camelopardalis	SAO	1876	HIP	56123
Tycho2	4555-01298-1	Gaia DR2	1133353122506604928	HD	99687	GC	15756
BD	BD+81 371	Distance	78.19	Distance ly	255.06

WDS 11303+8102 STF 1539 (HD 99687) : NOTES

discov_num	notes	refcode
STF1539	B is BD+81@370.

REFERENCES

refcode	metd	author	reference
STFA		(F. Struve DD - Appendix list #1)	...................
STFB		(F. Struve DD - Appendix list #2)	...................
StF1833A	Ma -	Struve, F.G.W.	1833MmRAS...5...13H
StF1833A	+Mc	cited by Herschel (MemRAS 5, 13, 1833)
StF1833B	Ma -	Struve, F.G.W.	1833AN.....10..389B
StF1833B		cited by Bessel (AN 10, 389, 1833)
StF1837	Ma -	Struve, F.G.W.	1837AN.....14...249
StF1837		Stellarum duplicium et multiplicium mensurae micrometricae...
StF1837		(Dorpat, Academiae scientiarum caesareae petropolitaneifique), 1837
StF1844A	Ma -	Struve, F.G.W.	1844QB43.S66.......
StF1844A		cited by Smyth (Cycle of Celestial Objects 2, 1844)
StF1852A	Ma -	Struve, F.G.W.	.
StF1852A		cited by Bishop (Bishop Obs. Astron. Observations 1852)
StF1865A	Ma -	Struve, F.G.W.	1865AN.....64...81E
StF1865A		cited by Engelmann (AN 64, 81, #1518, 1865)
StF1875A	Ma -	Struve, F.G.W.	1875AN.....85..323D
StF1875A		cited by Doberck, 1875 (see Dob1875b,f,g,h)
StF1878	Ma -	Struve, F.G.W.	.
StF1878		Pulkova Observations 9, 1878
StF1878B	Ma -	Struve, F.G.W.	1878Obs.....2..239G
StF1878B		cited by Gledhill (Obs 2, 239, 1878)
StF1880A	Ma -	Struve, F.G.W.	1880Obs.....3..535G
StF1880A		cited by Gledhill (Obs 3, 535, 1880)
StF1906A	Ma -	Struve, F.G.W.	1906QB821.B972.....
StF1906A		cited in BDS (Burnham Double Star Cat.), 1906
StF1906B	Ma -	Struve, F.G.W.	1906MmRAS..56....1L
StF1906B		cited by Lewis (MemRAS 56, 1, 1906)
StF1922A	Ma -	Struve, F.G.W.	1922AN....216...49R
StF1922A		cited by Rabe (AN 216, 49, 1922)
StF1932A	Ma -	Struve, F.G.W.	1932QB821.A43......
StF1932A		cited in ADS (Aitken Double Star Cat.), 1932
StF2002	- -	Weis, J.
StF2002		F. G. W. Struve's double stars : the Dorpat catalogue; the Pulkovo catalogue
StF2002		USNO Library : QB 821 .S8 W49 2002
StF2022	- -	email note from Jan Weis: 6 July 2022
StF9999	Ma -	Struve, F.G.W.	...................
StF9999		Unpublished, manuscript or reference not found.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
11303+8102	STF1539		1999	16	313	19.4	8.49	9.85	F8	N D	113018.10+810214.3
11303+8102	STF1539		2011	18	313	19.4	8.49	9.85	F8	N D	113018.10+810214.3
11303+8102	STF1539		2015	21	313	19.4	8.49	9.85	F8	N	113018.10+810214.3
11303+8102	STF1539		2016	27	313	19.4	8.49	9.85	F8	N	113018.10+810214.3

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

WDS 11303+8102 STF 1539 (HD 99687) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 11303+8102 STF 1539 (HD 99687) : MEASURES

No records found.

WDS 11303+8102 (HD 99687) : VIRTUAL EYEPIECE

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

WDS 11303+8102 (HD 99687) : ALADIN DSS IMAGE @ 11^h 30^m 18.10^s +81° 02' 14.3"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 11303+8102 STF 1539 (HD 99687) : 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		11303+8102	STF1539		313	19.4
Show		11237+8041	LOC 334		310	59.6	27
Show		11195+8053	LOC 325		68	1.6	28
Show		11377+8129	TDS7964		86	2.3	32
Show		11474+8141	TDS 645		267	1.5	55
Show		11287+8003	LOC 333		256	10.4	60
Show		11404+7943	LOC 345		27	1.5	83
Show		11106+8216	TDS7713		93	2.1	86
Show		11407+7939	LOC 342		297	3.1	87
Show		11346+8238	LOC 335		181	3.2	97
Show		11484+7921	LOC 343		100	5.2	112
Show		11436+7902	WIS 190	AC	341	660.3	126
Show		11457+7856	LDS1738		259	104.4	133
Show		11360+7831	LDS1737	AB	355	116.8	153
Show		11360+7831	NVL 2	AC	81	122.6	153
Show		11484+7836	LDS1740		217	44.9	155
Show		11200+7823	MLR 527		236	3.2	162
Show		11254+7817	LDS 920		328	72.9	167
Show		11313+7814	LDS1734		208	2.8	169
Show		11104+8347	SKF 396		158	27.6	169
Show		11484+7816	LDS1741		254	26.4	174
Show		11193+8403	LOC 330		67	8.2	182
Show		11412+7753	MLR 528		239	5.9	192
Show		11434+7739	LOC 341		271	4.0	207
Show		11134+7737	MLR 526		312	0.7	210
Show		11423+7729	TDS8002		274	1.0	216
Show		11493+7728	LOC 340		141	1.1	221
Show		11228+7722	TOK 279		275	299.4	221
Show		11209+8501	LOC 337		162	2.5	239
Show		11475+7702	LDS1739		282	60.8	245
Show		11115+7702	LDS1729		315	33.4	245
Show		11171+7643	MLR 325		314	0.1	262
Show		11209+8526	LOC 336		189	1.3	264
Show		11360+7634	LDS1736		177	1.8	266
Show		11278+7636	LOC 331		354	6.4	266
Show		11137+7636	LOC 357	BC	187	13.7	270
Show		11137+7636	LOC 357	AB	13	1.0	270
Show		11137+7636	LOC 357	AC	187	12.7	270
Show		11474+8532	HDS1664		96	0.3	272
Show		11228+7625	HJ 1186		285	14.7	278
Show		11241+7623	HJ 1187	AB	179	19.2	280
Show		11241+7623	WNO 41	AC	145	30.9	280
Show		11241+7623	WNO 41	AD	9	28.4	280
Show		11241+7623	WNO 41	AE	218	39.9	280
Show		11249+7620	HJ 1188		34	20.7	283

WDS 11303+8102 : COMPONENTS

	A
B	pa=350.4° sep=13.33"

11303+8102 A

Componente originario normalizzato	AB	Name	HD 99687	Coord arcsec 2000	113018.10+810214.3	Mag	8.49
Spectral class	F8 (yellow-white)	PmRA	36.00	PmDE	26.0	SAO	1876
HIP	56123	Tycho2	4555-01298-1	HD	99687	GC	15756
BD	BD+81 371

Tycho2

Tycho2	4555-01298-1	Pflag		RAmdeg	172.57541167	DEmdeg	81.03729522
PmRA	36.0	PmDE	24.0	E RAmdeg	7	E DEmdeg	7
E pmRA	1.1	E pmDE	1.1	EpRAm	1991.20	EpDEm	1991.08
Num	11	Q RAmdeg	0.9	Q DEmdeg	1.1	Q pmRA	0.9
Q pmDE	1.2	BTmag	9.016	E BTmag	0.017	VTmag	8.485
E VTmag	0.013	Prox	194	TYC	T	HIP	56123
CCDM	A	RAdeg	172.57488472	DEdeg	81.03723972	EpRA 1990	1.74
EpDE 1990	1.68	E RAdeg	6.7	E DEdeg	6.8	Posflg
Corr	0.0

SAO

SAO	1876	DelFlag		RA1950		PmRA1950	0.0151
DE1950		PmDE1950	0.002	Vmag	8.1	SpType	F8
Double code		Source	70	CatNum	15756	DM	BD+81 371
DMcomp		BDsup		HD	99687	M HD	0
GC	15756	RA1950rad	2.99650276	DE1950rad	1.41916881	PmRA2000	0.0146
PmDE2000	0.007

Hipparcos

Catalog	H	HIP	56123	Proxy		RAhms	11 30 17.97
DEdms	+81 02 14.1	Vmag	8.42	VarFlag		R Vmag	G
RAdeg	172.575	DEdeg	81.0372	AstroRef	A	Plx	9.32
CCDM	11303+8102	N CCDM	I	Nsys	2	Ncomp	1
MultFlag	C	Source	P	Qual	A	M HIP
Theta		Rho		HD	99687	BD	BD+81 371
CD		CP		Dm number	+81 371	VIred	0.61
SpType	F8	R SpType		Coord arcsec 2000	113017.97+810214.1

Hipparcos 2

HIP	56123	Sn	95	So	3	Nc	1
RArad	3.0119996744	DErad	1.4143665785	Plx	12.79	PmRA	33.07
PmDE	29.82	E RArad	1.25	E DErad	1.16	E Plx	1.42
E pmRA	1.55	E pmDE	1.3	Hpmag	8.5296	E Hpmag	0.0154
SHp	0.066	VA	0	BV	0.538	E BV	0.015
VI	0.61

CCDM

Ccdm	11303+8102	RComp		Comp	A	Note1
Note2		Discov num		DRAs	0.20	DDEs	15.2
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	8.1	Sp	F5	PmNote	*
PmRA	40	PmDE	43	Dm number	+81 371	Cat1	BD
Name2	+81 338	Cat2	AGK2/3	HD	99687	M HD
ADS BDS	A 8181	M ADS BDS		N IDS		IDS	11231N8135A
HIC	56123

11303+8102 B

Componente originario normalizzato	AB		Coord arcsec 2000	113017.15+810227.4		Mag	9.85		PmRA	33.00
PmDE	25.0		Calc delta mag	1.36		Calc coord	yes

CCDM

Ccdm	11303+8102	RComp		Comp	B	Note1
Note2		Discov num	STF1539	DRAs	-5.62	DDEs	27.7
R dRAs	10	Year	1832	Theta	313	Rho	19.0
Obs	6	Vmag	10.5	Sp		PmNote	*
PmRA	45	PmDE	25	Dm number	+81 370	Cat1	BD
Name2	+81 337	Cat2	AGK2/3	HD		M HD
ADS BDS	A 8181	M ADS BDS		N IDS		IDS	11231N8135B
HIC	56118