20244+1935 STF 2679 AC

20^h 24^m 22.59^s +19° 34' 30.0" P.A. 150.00 sep 38.6 mag 7.88,11.56 Sp A2V+A4 dist. 244.5 pc (797.56 l.y.)

Coord 2000	20244+1935	Discov num	STF2679	Comp	AC	Coord arcsec 2000	20 24 22.59 +19 34 30.0
Date first	1895	Date last	2017	Obs	17
Pa first	153	Pa last	149.8	P.A. Now (θ)	149.8°
Sep first	38.8	Sep last	38.596	Sep. Now (ρ)	38.596"
Mag pri	7.88	Mag sec	11.56	delta mag (ΔM)	3.68	Spectral class	A2V+A4 (white/white)
Pri motion ra	-010	Sec motion ra	+002
Pri motion dec	-012	Sec motion dec	-007
Notes

rPM=0.832

This double is not physical.

20244+1935 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 194318	106068	20 24 23 +19 34 30	STF 2679 AB	2019	51	77	24.7	7.88	9.69	1.81
Show		106068	20 24 23 +19 34 30	STF 2679 AC	2017	17	150	38.6	7.88	11.56	3.68		<===

Triple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Delphinus	SAO	106068	HIP	100638	Tycho2	1640-01633-1
Gaia DR2	1816277657286040192	HD	194318	BD	BD+19 4396	Distance	244.5
Distance ly	797.56

WDS 20244+1935 STF 2679 AC : 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
20244+1935	STF2679	AC	2005	6	150	38.7	7.88	12.30	A2V	D	202422.59+193430.0
20244+1935	STF2679	AC	2013	8	151	38.6	7.88	11.56	A2V		202422.59+193430.0
20244+1935	STF2679	AC	2014	9	150	39.2	7.88	11.56	A2V		202422.59+193430.0
20244+1935	STF2679	AC	2015	10	150	38.5	7.88	11.56	A2V		202422.59+193430.0
20244+1935	STF2679	AC	2016	12	150	38.7	7.88	11.56	A2V+A4		202422.59+193430.0
20244+1935	STF2679	AC	2017	13	150	38.6	7.88	11.56	A2V+A4		202422.59+193430.0

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

WDS 20244+1935 STF 2679 AC : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20244+1935 STF 2679 AC : MEASURES

No records found.

WDS 20244+1935 : VIRTUAL EYEPIECE

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

WDS 20244+1935 : ALADIN DSS IMAGE @ 20^h 24^m 22.59^s +19° 34' 30.0"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20244+1935 STF 2679 AC : 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		20244+1935	STF2679	AB	77	24.7	1
Show		20244+1935	STF2679	AC	150	38.6	1
Show		20243+1909	HU 361		198	0.6	26
Show		20267+1940	GWP2949		267	111.9	34
Show		20216+1930	COU 327	AB	245	0.2	40
Show		20216+1930	COU 327	AB,C	132	4.1	40
Show		20224+2006	BUP9009			47.1	43
Show		20278+1935	TDT2296		359	1.6	48
Show		20230+2020	HDS2911		333	0.4	50
Show		20209+1948	HJ 2954	AB	303	3.1	52
Show		20209+1948	HJ 2954	BC	292	23.1	52
Show		20228+2023	J 3081			6.2	53
Show		20227+2023	J 3080		292	7.4	53
Show		20231+1844	LDS5905		116	3.5	53
Show		20196+1925	BRT2525		60	1.9	69
Show		20195+1954	J 836		251	3.0	74
Show		20283+1846	HO 131	AB	334	3.4	74
Show		20283+1846	HO 131	AC	69	64.4	74
Show		20283+1846	HO 131	AD	97	76.9	74
Show		20200+1848	HU 359		179	0.2	77
Show		20231+2052	A 288		296	0.2	80
Show		20302+1925	FOX 254	CD	301	35.0	82
Show		20302+1925	BU 987	AB	128	2.5	84
Show		20302+1925	S 752	AC	288	106.3	84
Show		20302+1925	FOX 254	AE	70	21.2	84
Show		20187+2001	HDS2901		46	0.3	84
Show		20235+1811	J 839		347	2.1	85
Show		20272+2049	BRT2476		77	5.6	86
Show		20306+1932	UC 251		38	39.9	89
Show		20186+1905	J 835		45	3.4	90
Show		20183+2002	HJ 912	AB	78	5.1	91
Show		20183+2002	HJ 912	AC	170	89.6	91
Show		20201+1823	DAM 211	AB	166	7.0	94
Show		20201+1823	DAM 211	AC	233	7.6	94
Show		20178+1917	TDT2146		307	0.7	96
Show		20178+1944	J 3072		91	5.8	97
Show		20203+1826	J 3075		104	4.9	99
Show		20204+1825	J 3076		209	5.9	99
Show		20310+2007	HJ 2974		297	14.4	99
Show		20193+2047	TDT2166	AB	20	2.5	102
Show		20278+1805	HJL1103		82	126.5	103
Show		20222+2116	BRT2470		221	1.9	105
Show		20173+2009	J 3071		219	6.1	106
Show		20177+2025	COU 219	Aa,Ab	109	0.4	107
Show		20177+2025	J 2308	AB	283	37.0	107
Show		20177+2025	J 2308	AC	284	42.5	107
Show		20177+2025	BTG 4	AD	170	33.8	107
Show		20177+2025	BTG 4	AE	267	28.9	107
Show		20177+2025	J 2308	BC	297	5.7	108
Show		20247+1747	BPMA247		40	194.2	108
Show		20232+2122	LDS1041		134	6.0	109

WDS 20244+1935 : COMPONENTS

	A	B
B	pa=76.2° sep=23.39"
C	pa=151.3° sep=38.04"	pa=186.5° sep=39.18"

20244+1935 A

Name	HD 194318	Coord arcsec 2000	202422.59+193430.0	Mag	7.88	Spectral class	A2V (white)
PmRA	-10.00	PmDE	-12.0	SAO	106068	HIP	100638
Tycho2	1640-01633-1	HD	194318	GC	28385	BD	BD+19 4396

Tycho2

Tycho2	1640-01633-1	Pflag		RAmdeg	306.09411724	DEmdeg	19.57497172
PmRA	-9.0	PmDE	-11.4	E RAmdeg	5	E DEmdeg	6
E pmRA	1.1	E pmDE	1.0	EpRAm	1991.31	EpDEm	1990.85
Num	13	Q RAmdeg	0.6	Q DEmdeg	1.0	Q pmRA	0.5
Q pmDE	1.0	BTmag	7.991	E BTmag	0.017	VTmag	7.876
E VTmag	0.013	Prox	240	TYC	T	HIP	100638
CCDM	A	RAdeg	306.09413944	DEdeg	19.57499889	EpRA 1990	1.68
EpDE 1990	1.40	E RAdeg	5.1	E DEdeg	6.3	Posflg
Corr	0.1

SAO

SAO	106068	DelFlag		RA1950		PmRA1950	-0.0007
DE1950		PmDE1950	0.004	Vmag	7.4	SpType	A2
Double code		Source	70	CatNum	28385	DM	BD+19 4396
DMcomp		BDsup		HD	194318	M HD	0
GC	28385	RA1950rad	5.33256365	DE1950rad	0.33881044	PmRA2000	-0.0007
PmDE2000	0.002

Hipparcos

Catalog	H	HIP	100638	Proxy		RAhms	20 24 22.59
DEdms	+19 34 30.0	Vmag	7.86	VarFlag		R Vmag	H
RAdeg	306.094	DEdeg	19.575	AstroRef	A	Plx	4.45
CCDM	20244+1934	N CCDM	I	Nsys	2	Ncomp	1
MultFlag	C	Source	P	Qual	D	M HIP
Theta		Rho		HD	194318	BD	BD+19 4396
CD		CP		Dm number	+19 4396	VIred	0.08
SpType	A2	R SpType		Coord arcsec 2000	202422.59+193430.0

Hipparcos 2

HIP	100638	Sn	95	So	3	Nc	1
RArad	5.342350517	DErad	0.3416481981	Plx	4.09	PmRA	-9.46
PmDE	-12.1	E RArad	0.87	E DErad	0.68	E Plx	1.12
E pmRA	1.1	E pmDE	0.78	Hpmag	7.9053	E Hpmag	0.0228
SHp	0.024	VA	0	BV	0.131	E BV	0.013
VI	0.15

20244+1935 B

Coord arcsec 2000	202424.20+193435.6		Mag	9.69		PmRA	5.00		PmDE	-6.0
HIP	100640		Calc delta mag	1.81		Calc coord	yes

Hipparcos

Catalog	H	HIP	100640	Proxy		RAhms	20 24 24.25
DEdms	+19 34 35.2	Vmag	9.99	VarFlag		R Vmag	H
RAdeg	306.101	DEdeg	19.5765	AstroRef	B	Plx	-23.92
CCDM	20244+1934	N CCDM	I	Nsys	2	Ncomp	1
MultFlag	C	Source	I	Qual	D	M HIP
Theta		Rho		HD	194318	BD
CD		CP		Dm number		VIred	0.44
SpType	F0	R SpType		Coord arcsec 2000	202424.25+193435.2

Hipparcos 2

HIP	100640	Sn	95	So	3	Nc	1
RArad	5.3424711966	DErad	0.3416736123	Plx	-10.47	PmRA	13.41
PmDE	-11.75	E RArad	5.96	E DErad	4.72	E Plx	7.28
E pmRA	7.12	E pmDE	5.82	Hpmag	9.7573	E Hpmag	0.0948
SHp	0	VA	0	BV	0.378	E BV	0.015
VI	0.44

20244+1935 C

Coord arcsec 2000	202423.88+193356.6		Mag	11.56		Spectral class	A4 (white)		PmRA	2.00
PmDE	-7.0		Calc delta mag	3.68		Calc coord	yes