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20396+0458
KUI 99 AB
OQ Del

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Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20396+0458 KUI 99 AB (OQ Del)

20^h 39^m 37.71^s +04° 58' 19.3" P.A. 111.00 sep 0.3 mag 8.28,9.63 Sp K5V dist. 16.72 pc (54.54 l.y.)

Coord 2000	20396+0458	Discov num	KUI 99	Comp	AB	Coord arcsec 2000	20 39 37.71 +04 58 19.3
Date first	1934	Date last	2021	Obs	162
Pa first	313	Pa last	110.5	P.A. Now (θ)	124.6°
Sep first	0.7	Sep last	0.333	Sep. Now (ρ)	0.533"
Mag pri	8.28	Mag sec	9.63	delta mag (ΔM)	1.35	Spectral class	K5V (yellow-orange)
Pri motion ra	+874	Sec motion ra	+874
Pri motion dec	+091	Sec motion dec	+091
Notes	N O (See Notes, Orbital solution)

This double is physical.

20396+0458 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		126068	20 39 38 +04 58 19	BAG 14 Aa,Ab	2021	27	49	0.2	8.80	9.90	1.10	Y
Show	OQ Del	126068	20 39 38 +04 58 19	KUI 99 AB	2021	162	111	0.3	8.28	9.63	1.35	Y	<===

Triple system
2 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Var name	OQ Del	Constellation	Delphinus	SAO	126068	HIP	101955
Tycho2	0519-00866-1	HD	196795	GC	28771	GL	Gl 795A
BD	BD+04 4510	Distance	16.72	Distance ly	54.54

ORBITAL ELEMENTS

Period (P)	38.679y	± 0.031	Periastron (T)	2016.11y	± 1.32	Semi-major axis (a)	0.855a	± 0.11
Eccentricity (e)	0.118	± 0.016	Inclination (i)	87.4°	± 0.05	Longitude of periastron (ω)	233.4°	± 0.5
Node (Ω)	127.6°	± 0.08	Notes	n		Reference	Tok2017a
Equinox	2000		Last observation	2016		Grade	2	(1=Definitive, 9=Indet.)

label	theta	rho
2000	139.1	0.209
2001	155.4	0.091
2002	265.4	0.063
2003	294.2	0.177
2004	300.1	0.296
2005	302.6	0.410
2006	304.0	0.516
2007	305.0	0.608
2008	305.7	0.685
2009	306.3	0.743
2010	306.9	0.779
2011	307.4	0.791
2012	307.9	0.777
2013	308.4	0.737
2014	309.0	0.670
2015	309.8	0.578
2016	310.9	0.464
2017	312.9	0.333
2018	317.7	0.190
2019	351.7	0.050
2020	111.0	0.122
2021	120.3	0.268
2022	123.1	0.407
2023	124.6	0.533
2024	125.4	0.644
2025	126.1	0.738
2026	126.6	0.811
2027	127.0	0.865
2028	127.4	0.898
2029	127.8	0.911
2030	128.2	0.904

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

Measures: green=micrometric, blue=interferometric, purple=photographic

WDS 20396+0458 KUI 99 AB (OQ Del) : NOTES

discov_num	notes	refcode
KUI 99	For initial attempt I recorded 1950,497, 44.2deg, 0.31, dm 1.0 for a
	star 2 arcmin south of this pair. Such star was not found on later
	occasions when, however, the seeing was less satisfactory.	WRH1951
BAG 14	Visual primary is 920d SB2 (#1253 in Batten et al. 1989). There is	Bte1989
	some spectroscopic evidence for a third star.
	Malogolovets et al. (2007) derive spectral types for Aa, Ab, and B of	Mlg2007
	K5, K9, and K8, respectively. Mass of Aa+Ab is 1.28 +/- 0.15 Msun,
	entire triple has mass 1.69 +/- 0.27 Msun. The system is weakly
	hierarchical.

REFERENCES

refcode	metd	author	reference
Bte1989	-	Batten, A.H. & Fletcher, J.M.	1989PDAO...17....1B
Bte1989		Eighth Catalogue of the Orbital Elements of Spectroscopic Binary Systems; 89
Bte1989		Pub. DAO 17, 1, 19
Mlg2007	S j	Malogolovets, E.V., Balega, Yu.Yu., & Rastegaev, D.A.	2007AstBu..62..111M
Mlg2007	+orb	Astrophys. Bull. 62, 111, 2007
Mlg2007		(astrometry from Malogolovets (2007, private comm.)
Tok2017a	orb+j	Tokovinin, A. & Latham, D.W.	2017ApJ...838...54T
Tok2017a	+St+	ApJ 838, 54, 2017
WRH1951	J j	Wilson, R.H.	1951AJ.....56...69W
WRH1951	+Ma	AJ 56, 69, 1951
WRH1951		(U and T coded observations per van den Bos, J Obs 34, 85, 1951)	1951JO.....34...85V

DISCOVERER

idgroup	discov	author
1	BAG	Balega, Y.Y. & Tikhonov, N.A.
24	BAG	Balega, I.I., Balega, Y.Y., Belkin, I.N., Maximov, A.F., Orlov, V.G., Pluzhnik,
24	BAG	E.A., Shkhagosheva, Z.U., & Vasyuk, V.A.
25	BAG	Balega, I.I., Balega, Yu.Yu., Falcke, H., Osterbart, R., Reinheimer, T., Scholler,
25	BAG	M., & Weigelt, G.
30	BAG	Balega, I.I., Balega, Y.Y., Maksimov, A.F., Pluzhnik, E.A., Shkhagosheva, Z.U., &
30	BAG	Vasyuk, V.A.
35	BAG	Balega, I.I., Balega, Yu.Yu., Hofmann, K.-H., Maksimov, A.F., Pluzhnik, E.A.,
35	BAG	Schertl, D., Shkhagosheva, Z.U., & Weigelt, G.
38	BAG	Balega, I.I., Balega, Y.Y., Maksimov, A.F., Pluzhnik, E.A., Schertl, D.,
38	BAG	Shkhagosheva, Z.U., & Weigelt, G.
41	BAG	Balega, I.I., Balega, Y.Y., Hofmann, K.-H., Pluzhnik, E.A., Schertl, D.,
41	BAG	Shkhagosheva, Z.U., & Weigelt, G.
44	BAG	Balega, I.I., Balega, Y.Y., Hoffmann, K.-H., Malogolovets, E., Schertl, D.,
44	BAG	Shkhagosheva, Z.U., & Weigelt, G.
46	BAG	Balega, I.I., Balega, Yu.Yu., Maksimov, A.F., Malogolovets, E.V., Pluzhnik, E.A.,
46	BAG	& Shkhagosheva, Z.
47	BAG	Balega, Y.Y., Beuzit, J.-L., Delfosse, X., Forveille, T., Perrier, C., Mayor, M.,
47	BAG	Segransan, D., Udry, S., et al.
48	BAG	Balega, I.I., Balega, Yu.Yu., Maksimov, A.F., Malogolovets, E.V., Rastegaev, D.A.,
48	BAG	Shkhagosheva, Z.U., & Weigelt, G.
55	BAG	Balega, Yu.Yu., Dyachenko, V.V., Maksimov, A.F., & Malogolovets, E.V.,
55	BAG	Rastegaev, D.A., & Romanyuk, I.I.
56	BAG	Balega, Yu.Yu., Dyachenko, V.V., Maksimov, A.F., & Malogolovets, E.V.,
56	BAG	Rastegaev, D.A., & Romanyuk, I.I.
57	BAG	Balega, I.I., Balega, Yu.Yu., Gasanova, L.T., Dyachenko, V.V., Maksimov, A.F.,
57	BAG	Malogolovets, E.V., Rastegaev, D.A., & Shkhagosheva, Z.U.
60	KUI	Kuiper, G.P., Schilt, van den Bos, W., and van Gent

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20396+0458	KUI 99	AB	2007	137	304	0.6	8.28	9.63	K5V	NOD	203937.20+045818.7
20396+0458	KUI 99	AB	2008	140	311	0.7	8.28	9.63	K5V	NOD	203937.20+045818.7
20396+0458	KUI 99	AB	2014	142	312	0.5	8.28	9.63	K5V	NO	203937.20+045818.7
20396+0458	KUI 99	AB	2015	144	307	0.5	8.28	9.63	K5V	NO	203937.20+045818.7
20396+0458	KUI 99	AB	2016	146	322	0.4	8.28	9.63	K5V	NO	203937.71+045819.3
20396+0458	KUI 99	AB	2017	152	311	0.2	8.28	9.63	K5V	NO	203937.71+045819.3
20396+0458	KUI 99	AB	2018	153	333	0.2	8.28	9.63	K5V	NO	203937.71+045819.3
20396+0458	KUI 99	AB	2019	155	91	0.1	8.28	9.63	K5V	NO	203937.71+045819.3
20396+0458	KUI 99	AB	2021	161	111	0.3	8.28	9.63	K5V	NO	203937.71+045819.3

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

WDS 20396+0458 KUI 99 AB (OQ Del) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20396+0458 KUI 99 AB (OQ Del) : MEASURES

No records found.

WDS 20396+0458 (OQ Del) : 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 20396+0458 (OQ Del) : ALADIN DSS IMAGE @ 20^h 39^m 37.71^s +04° 58' 19.3"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20396+0458 KUI 99 AB (OQ Del) : 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		20396+0458	KUI 99	AB	111	0.3
Show		20396+0458	BAG 14	Aa,Ab	49	0.2
Show		20388+0512	GWP2976		324	6.5	19
Show		20382+0459	BAL2970		35	12.5	22
Show		20370+0452	SMA 118		125	19.1	41
Show		20367+0447	CBL 528		234	20.5	45
Show		20383+0408	BAL2541		78	15.1	55
Show		20358+0508	BAL2968		10	13.9	59
Show		20360+0411	J 2192		18	4.8	64
Show		20403+0349	J 156		21	2.3	70
Show		20348+0514	SCJ 26		88	25.1	75
Show		20399+0620	RAO 617		334	2.5	82
Show		20412+0338	BAL2543		33	6.5	84
Show		20340+0433	A 2282		166	0.2	88
Show		20386+0628	KPP 806		87	7.0	91
Show		20458+0445	BAL2971		21	17.1	93
Show		20403+0326	STT 409	AB	84	16.8	93
Show		20403+0326	STT 409	AC	330	62.8	93
Show		20373+0332	BAL2539		77	130.2	93
Show		20457+0430	A 2285	AB	222	7.7	96
Show		20457+0430	A 2285	AC	116	33.4	96
Show		20335+0527	STF2696	AB	298	0.5	96
Show		20335+0527	STF2696	AC	348	13.7	96
Show		20352+0608	HWE 98		1	58.5	96
Show		20379+0325	BAL2540		94	16.1	97
Show		20331+0525	TDT2364		126	1.9	101
Show		20455+0553	HDS2954		298	1.0	103
Show		20327+0453	J 2314	AB	70	4.9	105
Show		20327+0453	J 2314	AC	138	19.0	105
Show		20391+0312	BAL2032		33	16.3	107
Show		20452+0352	UC 4280		255	36.1	107
Show		20346+0615	UC 4218		315	75.8	108
Show		20324+0426	A 2281		63	1.9	113
Show		20459+0607	TDT2523		80	1.7	116
Show		20421+0648	GWP2987		295	266.1	117
Show		20473+0426	UC 4288		79	48.6	120
Show		20460+0344	BAL2544		14	16.7	122
Show		20424+0304	KPP3360		234	1.5	122
Show		20315+0444	BAL2966		117	10.4	122
Show		20347+0321	CRC 38		300	10.5	123
Show		20316+0530	A 395		160	0.7	124
Show		20419+0258	HJ 2988		142	23.2	126
Show		20312+0513	AG 257		75	1.7	127
Show		20466+0344	BAL2545		281	11.8	128
Show		20464+0618	TDT2533		230	0.7	129
Show		20311+0444	UC 4205		254	48.5	129
Show		20442+0648	SKF2552	AB	60	17.6	129
Show		20442+0648	SKF2552	AC	31	23.1	129
Show		20442+0648	SKF2552	BC	343	11.4	130
Show		20478+0555	TDT2543		263	0.6	135
Show		20484+0426	AG 267		260	6.1	136

WDS 20396+0458 : COMPONENTS

	A	Ab
Ab	pa=48.4° sep=0.16"
B	pa=110.6° sep=0.33"	pa=138.7° sep=0.29"

20396+0458 A

Name	OQ Del	Coord arcsec 2000	203937.71+045819.3	Mag	8.28	Spectral class	K5V (yellow-orange)
PmRA	874.00	PmDE	91.0	SAO	126068	HIP	101955
Tycho2	0519-00866-1	HD	196795	GC	28771	BD	BD+04 4510

Tycho2

Tycho2	0519-00866-1	Pflag	P	RAmdeg	309.90717156	DEmdeg	4.97205566
PmRA	873.9	PmDE	90.6	E RAmdeg	7	E DEmdeg	8
E pmRA	1.6	E pmDE	1.5	EpRAm	1991.32	EpDEm	1990.93
Num	6	Q RAmdeg	1.1	Q DEmdeg	0.4	Q pmRA	1.2
Q pmDE	0.5	BTmag	9.706	E BTmag	0.023	VTmag	8.282
E VTmag	0.013	Prox	8	TYC	T	HIP	101955
CCDM	A	RAdeg	309.90510611	DEdeg	4.97185556	EpRA 1990	1.62
EpDE 1990	1.35	E RAdeg	7.3	E DEdeg	8.4	Posflg	D
Corr	-0.1

SAO

SAO	126068	DelFlag		RA1950		PmRA1950	0.0576
DE1950		PmDE1950	0.087	Vmag	8.4	SpType	K5
Double code		Source	70	CatNum	28771	DM	BD+04 4510
DMcomp		BDsup		HD	196795	M HD	0
GC	28771	RA1950rad	5.39782359	DE1950rad	0.08365977	PmRA2000	0.0578
PmDE2000	0.087

Hipparcos

Catalog	H	HIP	101955	Proxy	H	RAhms	20 39 37.20
DEdms	+04 58 18.7	Vmag	7.88	VarFlag		R Vmag	G
RAdeg	309.905	DEdeg	4.97185	AstroRef	A	Plx	53.82
CCDM	20396+0458	N CCDM	I	Nsys	1	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	AB
Theta	127	Rho	0.919	HD	196795	BD	BD+04 4510
CD		CP		Dm number	+04 4510	VIred	1.44
SpType	K5V	R SpType		Coord arcsec 2000	203937.20+045818.7

Hipparcos 2

HIP	101955	Sn	15	So	3	Nc	2
RArad	5.4088629165	DErad	0.0867752134	Plx	59.8	PmRA	863.38
PmDE	76.29	E RArad	2.55	E DErad	2.09	E Plx	3.42
E pmRA	3.4	E pmDE	2.83	Hpmag	7.9818	E Hpmag	0.0013
SHp	0.014	VA	0	BV	1.241	E BV	0.032
VI	1.44

CCDM

Ccdm	20396+0458	RComp		Comp	A	Note1
Note2		Discov num		DRAs	1.75	DDEs	19.5
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	8.8	Sp	K5	PmNote	*
PmRA	877	PmDE	92	Dm number	+04 4510	Cat1	BD
Name2	+04 2784	Cat2	AGK2/3	HD	196795	M HD
ADS BDS		M ADS BDS		N IDS		IDS	20346N0437A
HIC	101955

20396+0458 Ab

Coord arcsec 2000

203937.72+045819.4

Mag

9.9

Calc delta mag

1.1

Calc coord

yes

20396+0458 B

Coord arcsec 2000	203937.73+045819.2		Mag	9.63		PmRA	874.00		PmDE	91.0
Tycho2	0519-00866-2		Calc delta mag	0.83		Calc coord	yes

Tycho2

Tycho2	0519-00866-2	Pflag	P	RAmdeg	309.90717156	DEmdeg	4.97205566
PmRA	873.9	PmDE	90.6	E RAmdeg	7	E DEmdeg	8
E pmRA	1.6	E pmDE	1.5	EpRAm	1991.32	EpDEm	1990.93
Num	6	Q RAmdeg	1.1	Q DEmdeg	0.4	Q pmRA	1.2
Q pmDE	0.5	BTmag	11.224	E BTmag	0.061	VTmag	9.627
E VTmag	0.026	Prox	8	TYC	T	HIP	101955
CCDM	B	RAdeg	309.90529222	DEdeg	4.97171389	EpRA 1990	1.61
EpDE 1990	1.36	E RAdeg	19.6	E DEdeg	22.8	Posflg	D
Corr	-0.1

CCDM

Ccdm	20396+0458	RComp		Comp	B	Note1	*
Note2		Discov num	KUI 99	DRAs		DDEs
R dRAs		Year	1935	Theta		Rho
Obs	99	Vmag	9.8	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS		M ADS BDS		N IDS		IDS	20346N0437B
HIC	101955