18521+5120 STF 2416 AB (HD 175308)

18^h 52^m 08.85^s +51° 19' 42.8" P.A. 157.00 sep 20.3 mag 8.67,11.17 Sp G0

Coord 2000	18521+5120	Discov num	STF2416	Comp	AB	Coord arcsec 2000	18 52 08.85 +51 19 42.8
Date first	1830	Date last	2020	Obs	33
Pa first	157	Pa last	157.4	P.A. Now (θ)	157.4°
Sep first	15.6	Sep last	20.27	Sep. Now (ρ)	20.27"
Mag pri	8.67	Mag sec	11.17	delta mag (ΔM)	2.5	Spectral class	G0 (yellow)
Pri motion ra	-001	Sec motion ra	+003
Pri motion dec	+010	Sec motion dec	-012
Notes	U (Proper motion indicates non-physical)

rPM=1.808

This double is not physical.

18521+5120 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 175308	31225	18 52 09 +51 19 43	STF 2416 AB	2020	33	157	20.3	8.67	11.17	2.50		<===
Show		31225	18 52 09 +51 19 43	STF 2416 AC	2020	23	39	122.5	8.67	9.41	0.74

Triple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	HD 175308		Constellation	Draco		SAO	31225		Tycho2	3552-00143-1
Gaia DR2	2144476384916929280		HD	175308		GC	25912

WDS 18521+5120 STF 2416 AB (HD 175308) : NOTES

No records found.

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
18521+5120	STF2416	AB	2006	15	157	20.0	8.67	11.17	G0	LD	185208.85+511942.8
18521+5120	STF2416	AB	2008	16	158	20.4	8.67	11.17	G0	LD	185208.85+511942.8
18521+5120	STF2416	AB	2010	18	158	19.9	8.67	11.17	G0	LD	185208.85+511942.8
18521+5120	STF2416	AB	2015	20	158	19.9	8.67	11.17	G0	L	185208.85+511942.8
18521+5120	STF2416	AB	2017	22	159	20.2	8.67	11.17	G0	L	185208.85+511942.8
18521+5120	STF2416	AB	2020	33	157	20.3	8.67	11.17	G0	U	185208.85+511942.8

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

WDS 18521+5120 STF 2416 AB (HD 175308) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 18521+5120 STF 2416 AB (HD 175308) : MEASURES

No records found.

WDS 18521+5120 (HD 175308) : 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 18521+5120 (HD 175308) : ALADIN DSS IMAGE @ 18^h 52^m 08.85^s +51° 19' 42.8"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 18521+5120 STF 2416 AB (HD 175308) : 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		18521+5120	STF2416	AB	157	20.3
Show		18521+5120	STF2416	AC	39	122.5
Show		18517+5116	ES 788		317	3.3	7
Show		18515+5124	SMR 76		315	5.0	8
Show		18527+5135	COU2517		109	0.9	17
Show		18526+5140	TDT1102		95	2.0	21
Show		18496+5048	UC 3686		24	48.1	40
Show		18495+5157	UC 3685		147	73.5	45
Show		18512+5210	BEM 35		156	17.2	51
Show		18571+5143	SHY 749		208	999.9	52
Show		18577+5100	RAO 402		62	1.6	56
Show		18540+5027	AZC 178		224	18.8	57
Show		18466+5142	HU 756		263	1.0	57
Show		18583+5114	KPP 430		144	4.7	59
Show		18456+5119	KPP4119	AB	24	18.5	62
Show		18461+5212	MLR 637		102	0.8	77
Show		18586+5210	MLR 638		132	0.3	79
Show		18567+5014	JNN 153		324	23.2	79
Show		18448+5201	HU 755		124	0.6	80
Show		19011+5121	ES 789		264	4.5	85
Show		18558+5240	ES 650	AB	329	4.6	88
Show		18558+5240	ES 650	AC	197	26.7	88
Show		19002+5207	ES 651		138	5.1	88
Show		18459+5228	RAO 398		190	2.7	90
Show		19020+5153	LDS4804		227	42.2	98
Show		18417+5108	HU 754		93	1.3	99
Show		18516+5259	TRN 3	AB	101	1.1	99
Show		18516+5259	LEP 90	AC	327	206.5	99
Show		19025+5141	KPP4135		36	1.6	100
Show		19025+5142	TDT1193		91	1.2	100
Show		19030+5135	STF2451		84	1.9	103
Show		19027+5055	ES 977	AB	177	15.7	103
Show		18599+5008	DEA 356		13	16.2	103
Show		19028+5150	ES 2671		289	7.9	105
Show		18414+5150	SLE 239		98	13.2	105
Show		19004+5006	KOI3263		275	0.8	108
Show		19002+5004	DEA 144		32	7.5	108
Show		18568+4941	DEA 156		201	7.8	109
Show		19021+5216	HU 757	BC	168	0.2	109
Show		19021+5216	STF2450	A,BC	300	5.2	109
Show		19001+4959	KPP2132		128	17.4	111
Show		18585+4946	DEA 295		276	12.0	112
Show		18399+5106	ES 787		38	8.3	116
Show		18402+5048	COU2515		276	0.3	118
Show		19027+5014	KOI 72		296	2.0	120
Show		18525+5319	KPP4125		267	1.7	120
Show		18545+4920	DEA 165		240	8.3	122
Show		19024+5007	KOI1833	AB	76	0.0	122
Show		19024+5007	KOI1833	AC	278	4.5	122
Show		19006+4948	KOI2376		213	0.4	122
Show		18475+4926	BU 971	AB	215	0.5	123

WDS 18521+5120 : COMPONENTS

	A	B
B	pa=165.4° sep=19.34"
C	pa=27.1° sep=106.43"	pa=21.0° sep=121.56"

18521+5120 A

Name	HD 175308	Coord arcsec 2000	185208.85+511942.8	Mag	8.67	Spectral class	G0 (yellow)
PmRA	-1.00	PmDE	10.0	SAO	31225	Tycho2	3552-00143-1
HD	175308	GC	25912	DM	BD+51 2444

Tycho2

Tycho2	3552-00143-1	Pflag		RAmdeg	283.03688726	DEmdeg	51.32858069
PmRA	-0.5	PmDE	11.7	E RAmdeg	8	E DEmdeg	8
E pmRA	1.3	E pmDE	1.3	EpRAm	1990.83	EpDEm	1990.96
Num	8	Q RAmdeg	1.5	Q DEmdeg	1.0	Q pmRA	1.5
Q pmDE	1.0	BTmag	9.000	E BTmag	0.018	VTmag	8.671
E VTmag	0.015	Prox	195	TYC	T	HIP
CCDM		RAdeg	283.03688833	DEdeg	51.32855389	EpRA 1990	1.61
EpDE 1990	1.71	E RAdeg	7.9	E DEdeg	7.5	Posflg
Corr	0.0

SAO

SAO	31225	DelFlag		RA1950		PmRA1950	0.0012
DE1950		PmDE1950	0.014	Vmag	8.7	SpType	G0
Double code		Source	70	CatNum	25912	DM	BD+51 2444
DMcomp		BDsup		HD	175308	M HD	0
GC	25912	RA1950rad	4.93465619	DE1950rad	0.89476594	PmRA2000	0.0018
PmDE2000	0.014

18521+5120 B

Coord arcsec 2000	185209.37+511924.1		Mag	11.17		PmRA	3.00		PmDE	-12.0
Tycho2	3552-01016-1		Calc delta mag	2.5		Calc coord	yes

Tycho2

Tycho2	3552-01016-1	Pflag		RAmdeg	283.04019050	DEmdeg	51.32350332
PmRA	2.6	PmDE	-14.4	E RAmdeg	38	E DEmdeg	47
E pmRA	2.3	E pmDE	2.2	EpRAm	1986.00	EpDEm	1985.78
Num	4	Q RAmdeg	1.6	Q DEmdeg	1.5	Q pmRA	1.6
Q pmDE	1.5	BTmag	11.271	E BTmag	0.074	VTmag	11.174
E VTmag	0.092	Prox	195	TYC	T	HIP
CCDM		RAdeg	283.04019639	DEdeg	51.32353083	EpRA 1990	1.62
EpDE 1990	1.70	E RAdeg	49.3	E DEdeg	49.8	Posflg
Corr	0.0

18521+5120 C

Coord arcsec 2000	185214.02+512117.6		Mag	9.41		PmRA	-15.00		PmDE	-20.0
Calc delta mag	0.74		Calc coord	yes