20412-0105 STF 2706 AB (HD 197042)

20^h 41^m 11.03^s -01° 04' 49.8" P.A. 37.00 sep 11.1 mag 8.68,10.78 Sp K2

Coord 2000	20412-0105	Discov num	STF2706	Comp	AB	Coord arcsec 2000	20 41 11.03 -01 04 49.8
Date first	1825	Date last	2015	Obs	19
Pa first	34	Pa last	37.3	P.A. Now (θ)	37.3°
Sep first	10.7	Sep last	11.111	Sep. Now (ρ)	11.111"
Mag pri	8.68	Mag sec	10.78	delta mag (ΔM)	2.1	Spectral class	K2 (yellow-orange)
Pri motion ra	-003	Sec motion ra	+000
Pri motion dec	-007	Sec motion dec	-006
Notes

rPM=0.415

Nature of this double is uncertain.

20412-0105 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 197042	144699	20 41 11 -01 04 50	STF 2706 AB	2015	19	37	11.1	8.68	10.78	2.10		<===
Show		144699	20 41 11 -01 04 50	STF 2706 AC	2003	9	318	189.6	8.68	9.75	1.07

Triple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	HD 197042		Constellation	Aquarius		SAO	144699		Tycho2	5177-01290-1
Gaia DR2	4226267236812803712		HD	197042		GC	28819

WDS 20412-0105 STF 2706 AB (HD 197042) : 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
20412-0105	STF2706	AB	1998	14	37	11.1	8.68	11.30	K2	D	204111.03-010449.8
20412-0105	STF2706	AB	2000	15	38	11.1	8.68	11.30	K2	D	204111.03-010449.8
20412-0105	STF2706	AB	2013	16	37	11.2	8.68	10.78	K2		204111.03-010449.8
20412-0105	STF2706	AB	2015	17	37	11.1	8.68	10.78	K2		204111.03-010449.8

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

WDS 20412-0105 STF 2706 AB (HD 197042) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20412-0105 STF 2706 AB (HD 197042) : MEASURES

No records found.

WDS 20412-0105 (HD 197042) : 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 20412-0105 (HD 197042) : ALADIN DSS IMAGE @ 20^h 41^m 11.03^s -01° 04' 49.8"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20412-0105 STF 2706 AB (HD 197042) : 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		20412-0105	STF2706	AB	37	11.1	1
Show		20412-0105	STF2706	AC	318	189.6	1
Show		20383-0106	BU 672		285	35.8	43
Show		20441-0116	GWP2991		16	13.8	46
Show		20399-0155	UC 4249		339	14.0	54
Show		20411-0201	GWP2983		178	12.8	56
Show		20452-0103	LEO 56		278	0.5	61
Show		20368-0102	J 567		308	2.2	67
Show		20406-0002	SLW1226		226	166.7	68
Show		20450-0140	LDS 722		266	25.1	68
Show		20401-0009	GRV1232		144	24.2	77
Show		20384+0000	J 2318	AB	150	5.6	78
Show		20384+0000	J 2318	AC	119	14.9	78
Show		20402-0222	KPP4209	AB	250	2.2	79
Show		20416+0017	UC 4258	AB	3	46.5	82
Show		20434-0012	J 3346		106	1.8	82
Show		20435+0011	GRV1233		104	10.5	84
Show		20420+0021	UC 4262		221	44.1	87
Show		20405-0023	SKF1768		18	1.5	89
Show		20425-0233	WRH 13		101	1.8	91
Show		20396+0025	UC 4246		52	20.8	94
Show		20394+0029	HJ 2984	AB	225	65.0	98
Show		20394+0029	HJ 2984	AC	30	65.9	98
Show		20394+0029	FYM 187	AE	118	35.2	98
Show		20394+0029	FYM 187	CD	122	20.2	99
Show		20372-0225	BRT 503		73	4.6	100
Show		20409-0036	A 874		345	1.9	101
Show		20390-0035	BVD 131		133	30.3	105
Show		20445+0029	BAL1219		214	17.3	107
Show		20403+0041	A 2284		287	4.8	107
Show		20454+0023	A 876		68	0.6	109
Show		20453-0239	BRT 506		277	4.1	113
Show		20472-0006	BAL 924		128	15.4	116
Show		20441+0044	BAL1218		229	3.4	118
Show		20373-0039	J 2317		120	6.1	119
Show		20373+0041	UC 4236		284	17.8	121
Show		20478+0007	SKF2612		63	1.0	123
Show		20374-0254	TOR 27		233	2.9	123
Show		20352+0019	RST5157		293	1.8	124
Show		20472+0021	CBL 529		43	49.8	125
Show		20367-0250	UC 4231		75	24.4	126
Show		20425+0100	TDT2487		302	1.1	127
Show		20433+0059	SLN 39		233	19.0	128
Show		20371-0258	TDT2427		92	1.0	128
Show		20375-0303	BRT 505	BC	56	7.0	130
Show		20375-0303	J 1775	BD	238	19.7	130
Show		20375-0303	J 1775	AB	352	4.1	130
Show		20375-0303	BRT 505	AC	36	8.8	130
Show		20375-0303	J 1775	AD	249	18.3	130
Show		20414+0105	GWP2985		352	30.4	131
Show		20499-0131	RST4684		3	0.3	133

WDS 20412-0105 : COMPONENTS

	A	B
B	pa=37.3° sep=11.11"
C	pa=317.8° sep=189.59"	pa=314.5° sep=187.88"

20412-0105 A

Name	HD 197042	Coord arcsec 2000	204111.03-010449.8	Mag	8.68	Spectral class	K2 (yellow-orange)
PmRA	-3.00	PmDE	-7.0	SAO	144699	Tycho2	5177-01290-1
HD	197042	GC	28819	DM	BD-01 4027

Tycho2

Tycho2	5177-01290-1	Pflag		RAmdeg	310.29595404	DEmdeg	-1.08050081
PmRA	-2.8	PmDE	-5.0	E RAmdeg	10	E DEmdeg	11
E pmRA	0.9	E pmDE	0.9	EpRAm	1989.31	EpDEm	1988.07
Num	12	Q RAmdeg	0.7	Q DEmdeg	1.0	Q pmRA	0.8
Q pmDE	1.0	BTmag	10.245	E BTmag	0.033	VTmag	8.681
E VTmag	0.015	Prox	999	TYC	T	HIP
CCDM		RAdeg	310.29596111	DEdeg	-1.08048889	EpRA 1990	1.55
EpDE 1990	1.24	E RAdeg	9.5	E DEdeg	11.7	Posflg
Corr	-0.2

SAO

SAO	144699	DelFlag		RA1950		PmRA1950	-0.0006
DE1950		PmDE1950	0.001	Vmag	8.7	SpType	K2
Double code		Source	70	CatNum	28819	DM	BD-01 4027
DMcomp		BDsup		HD	197042	M HD	0
GC	28819	RA1950rad	5.4044256	DE1950rad	-0.02197815	PmRA2000	-0.0004
PmDE2000	-0.002

20412-0105 B

Coord arcsec 2000	204111.48-010441.0		Mag	10.78		PmRA	0.00		PmDE	-6.0
Calc delta mag	2.1		Calc coord	yes

20412-0105 C

Coord arcsec 2000	204102.54-010229.3		Mag	9.75		PmRA	-7.00		PmDE	-16.0
Tycho2	5177-01394-1		Calc delta mag	1.07		Calc coord	yes

Tycho2

Tycho2	5177-01394-1	Pflag		RAmdeg	310.25977432	DEmdeg	-1.04230723
PmRA	-6.7	PmDE	-11.7	E RAmdeg	19	E DEmdeg	20
E pmRA	1.1	E pmDE	1.1	EpRAm	1987.19	EpDEm	1985.76
Num	5	Q RAmdeg	0.5	Q DEmdeg	0.7	Q pmRA	0.5
Q pmDE	0.7	BTmag	11.080	E BTmag	0.053	VTmag	9.754
E VTmag	0.028	Prox	999	TYC	T	HIP
CCDM		RAdeg	310.25979056	DEdeg	-1.04228194	EpRA 1990	1.53
EpDE 1990	1.34	E RAdeg	20.7	E DEdeg	23.2	Posflg
Corr	-0.2