You're not logged.

Actions

Advanced Search
Go to Simbad
New report
New measure
Login

Computed Lists

Current system

20462+1554
STF 2725 AB
OR Del

Selections

Full WDS
Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20462+1554 STF 2725 AB (OR Del)

20^h 46^m 13.31^s +15° 54' 26.4" P.A. 12.00 sep 6.2 mag 7.54,8.20 Sp K0 dist. 36.46 pc (118.93 l.y.)

Coord 2000	20462+1554	Discov num	STF2725	Comp	AB	Coord arcsec 2000	20 46 13.31 +15 54 26.4
Date first	1821	Date last	2019	Obs	287
Pa first	356	Pa last	11.6	P.A. Now (θ)	11.6°
Sep first	4.1	Sep last	6.204	Sep. Now (ρ)	6.204"
Mag pri	7.54	Mag sec	8.20	delta mag (ΔM)	0.66	Spectral class	K0 (yellow-orange)
Pri motion ra	+087	Sec motion ra	+096
Pri motion dec	+065	Sec motion dec	+072
Notes	N O (See Notes, Orbital solution)

rPM=0.095 (< 0.3, Physical double)

This double is physical.

20462+1554 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		106466	20 46 13 +15 54 26	WSI 110 Aa,Ab	2021	7	343	0.0	7.90	8.90	1.00	Y
Show	OR Del	106466	20 46 13 +15 54 26	STF 2725 AB	2019	287	12	6.2	7.54	8.20	0.66	Y	<===

Triple system
2 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Var name	OR Del	Constellation	Delphinus	SAO	106466	HIP	102490
Tycho2	1634-03058-1	Gaia DR2	1762987494080694016	HD	197913	GC	28953
ADS	14270	BD	BD+15 4251	Distance	36.46	Distance ly	118.93

ORBITAL ELEMENTS

Period (P)	2107.9177y	± 759.8293	Periastron (T)	1703.6193y	± 508.3354	Semi-major axis (a)	10.81181a	± 5.3979
Eccentricity (e)	0.94506	± 0.18354	Inclination (i)	65.666°	± 18.971	Longitude of periastron (ω)	92.31°	± 20.563
Node (Ω)	129.316°	± 103.149	Notes	n		Reference	Izm2019
Equinox			Last observation	2015		Grade	4	(1=Definitive, 9=Indet.)

label	theta	rho
2000	10.4	6.044
2001	10.4	6.051
2002	10.5	6.059
2003	10.6	6.067
2004	10.7	6.075
2005	10.7	6.082
2006	10.8	6.090
2007	10.9	6.098
2008	11.0	6.105
2009	11.0	6.113
2010	11.1	6.120
2011	11.2	6.128
2012	11.2	6.136
2013	11.3	6.143
2014	11.4	6.151
2015	11.5	6.158
2016	11.5	6.166
2017	11.6	6.173
2018	11.7	6.181
2019	11.7	6.188
2020	11.8	6.195
2021	11.9	6.203
2022	12.0	6.210
2023	12.0	6.218
2024	12.1	6.225
2025	12.2	6.232
2026	12.2	6.240
2027	12.3	6.247
2028	12.4	6.254
2029	12.4	6.261
2030	12.5	6.269

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

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

WDS 20462+1554 STF 2725 AB (OR Del) : NOTES

discov_num	notes	refcode
STF2725	AB: H 2 66.	MEv2010
	A premature orbit has been computed.

REFERENCES

refcode	metd	author	reference
Izm2019	orb u	Izmailov, I.S.	2019AstL...45...30I
Izm2019		Ast. Lett. 45, 30, 2019
Izm2019		(Orbital elements from weighted solutions used when available (Table 2),
Izm2019		unweighted elements (Table 1) used for remaining 29 systems.)
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)

DISCOVERER

idgroup	discov	author
1	STF	Struve, F.G.W.
34	WSI	Douglass, G.G., Hindsley, R.B., & Worley, C.E.
43	WSI	Mason, B.D., Hartkopf, W.I., Holdenried, E.R., Rafferty, T.J., Wycoff, G.L.,
43	WSI	Hennessy, G.S., Hall, D.M., Urban, S.E., et al.
46	WSI	Mason, B.D., Hartkopf, W.I., Wycoff, G.L., Holdenried, E.R., Platais, I.,
46	WSI	Rafferty, T.J., Hall, D.M., Hennessy, G.S., et al.
47	WSI	Mason, B.D., Hartkopf, W.I., Urban, S.E., Wycoff, G.L., Pascu, D., Hall, D.M.,
47	WSI	Hennessy, G.S., Platais, I., et al.
48	WSI	Mason, B.D., Hartkopf, W.I., Wycoff, G.L., Pascu, D., Urban, S.E., Hall, D.M.,
48	WSI	Hennessy, G.S., Rafferty, T.J., et al.
75	WSI	Mason, B.D., Hartkopf, W.I., Bredthauer, G., Ferguson, E.W., Finch, C.T., Kilian,
75	WSI	C.M., Rafferty, T.J., Ragan, T.J. & Wieder, G.D.
85	WSI	Mason, B.D., Williams, S.J., Matson, R.A., Josties, J.D., Eakens, P.D., Justice,
85	WSI	M., Kilian, C.M. & Warner, R.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20462+1554	STF2725	AB	2009	245	11	6.1	7.54	8.20	K0	NOD	204613.31+155426.4
20462+1554	STF2725	AB	2010	250	11	6.1	7.54	8.20	K0	NOD	204613.31+155426.4
20462+1554	STF2725	AB	2011	254	11	5.9	7.54	8.20	K0	NOD	204613.31+155426.4
20462+1554	STF2725	AB	2013	260	12	6.1	7.54	8.20	K0	NOD	204613.31+155426.4
20462+1554	STF2725	AB	2015	264	11	6.4	7.54	8.20	K0	NO	204613.31+155426.4
20462+1554	STF2725	AB	2016	274	11	6.2	7.54	8.20	K0	NO	204613.31+155426.4
20462+1554	STF2725	AB	2017	276	12	6.2	7.54	8.20	K0	NO	204613.31+155426.4
20462+1554	STF2725	AB	2018	280	12	6.1	7.54	8.20	K0	NO	204613.31+155426.4
20462+1554	STF2725	AB	2019	285	12	6.2	7.54	8.20	K0	NO	204613.31+155426.4

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

WDS 20462+1554 STF 2725 AB (OR Del) : VISUAL OBSERVATIONS REPORTS

Show	date	username	difficulty	separation	pa_estim	interest	notes
Show	22/08/29	daedalus1	mean difficulty	separated	12		Very pretty. Seeing: Pickering 9, excellent. Measures: theta 012, rho 6.55 +/- 0.090

WDS 20462+1554 STF 2725 AB (OR Del) : MEASURES

Records found: 1

Show	date	username	difficulty	sep	sep_sigma	pa	pa_sigma	delta_mag	#	notes
Show	15/11/08	g.locatelli	mean difficulty	6.38	0.05	10.85	0.66	0.62	1

WDS 20462+1554 (OR 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 20462+1554 (OR Del) : ALADIN DSS IMAGE @ 20^h 46^m 13.31^s +15° 54' 26.4"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20462+1554 STF 2725 AB (OR 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		20462+1554	WSI 110	Aa,Ab	343	0.0
Show		20462+1554	STF2725	AB	12	6.2
Show		20468+1602	BPM2264		222	107.2	11
Show		20467+1607	STF2727	AB	266	8.8	15
Show		20467+1607	FYM 18	AD	323	109.4	15
Show		20457+1537	BPM2255		85	72.3	20
Show		20466+1616	BPM2261		202	69.5	23
Show		20466+1532	J 3110		222	6.9	23
Show		20446+1605	BPM2245		198	112.1	27
Show		20481+1601	BPM2269		222	81.9	29
Show		20463+1624	BPM2257		337	107.8	30
Show		20467+1523	BPM2263		265	53.6	32
Show		20462+1520	YR 27	AB	240	0.9	35
Show		20481+1616	SKF1770		223	3.4	35
Show		20485+1545	BPM2272		333	103.7	35
Show		20489+1558	BPM2275		143	74.7	40
Show		20436+1537	J 3108		196	6.3	40
Show		20434+1604	HJ 1564		41	11.4	41
Show		20477+1519	BPM2266		294	106.0	42
Show		20435+1540	GWP2990		291	26.5	43
Show		20446+1635	BPM2250	BC	332	117.2	46
Show		20446+1635	BPM2248	AB	95	107.8	47
Show		20446+1635	BPM2249	AC	29	107.0	47
Show		20485+1628	BPM2271		127	97.8	47
Show		20448+1512	BPM2253		241	75.8	48
Show		20446+1642	BPM2246	AB	16	90.0	53
Show		20446+1642	BPM2247	AC	173	116.0	53
Show		20437+1635	BPM2237		49	108.4	55
Show		20501+1556	BPM2278		296	68.3	56
Show		20434+1512	UC 4270		2	52.2	60
Show		20444+1500	BPM2243		169	106.5	61
Show		20506+1601	BPM2281		268	35.3	64
Show		20435+1504	CIA 11		334	0.0	64
Show		20505+1616	KPP4216		237	1.6	65
Show		20455+1448	GWP2994		229	32.3	68
Show		20503+1630	LDS1048	AB	151	13.7	68
Show		20503+1630	LDS1048	AC	213	1.6	68
Show		20509+1544	BPM2282		160	54.6	68
Show		20413+1551	UC 4257		208	20.3	72
Show		20485+1448	J 1890		141	6.8	72
Show		20485+1450	BRT1349		46	2.7	73
Show		20415+1611	J 2319		192	7.5	74
Show		20435+1657	STF2720		177	4.0	74
Show		20465+1439	BPM2259		296	106.3	76
Show		20483+1444	LSC 93		142	0.2	76
Show		20509+1517	J 3113		111	4.8	78
Show		20514+1619	BPM2283		243	38.1	79
Show		20503+1649	TDT2571		258	0.8	81
Show		20463+1715	GWP2995		257	8.3	81
Show		20456+1714	COU 425		327	0.7	81
Show		20406+1559	BPM2225		57	22.7	81

WDS 20462+1554 : COMPONENTS

	A	Ab
Ab	pa=343.7° sep=0.05"
B	pa=11.2° sep=6.19"	pa=11.4° sep=6.15"

20462+1554 A

Name	OR Del	Coord arcsec 2000	204613.31+155426.4	Mag	7.54	Spectral class	K0 (yellow-orange)
PmRA	87.00	PmDE	65.0	SAO	106466	HIP	102490
Tycho2	1634-03058-1	HD	197913	GC	28953	BD	BD+15 4251

Tycho2

Tycho2	1634-03058-1	Pflag		RAmdeg	311.55546060	DEmdeg	15.90731998
PmRA	95.1	PmDE	67.2	E RAmdeg	4	E DEmdeg	7
E pmRA	1.5	E pmDE	1.5	EpRAm	1991.71	EpDEm	1991.01
Num	6	Q RAmdeg	1.0	Q DEmdeg	0.7	Q pmRA	1.1
Q pmDE	0.7	BTmag	8.430	E BTmag	0.017	VTmag	7.542
E VTmag	0.011	Prox	60	TYC	T	HIP	102490
CCDM	A	RAdeg	311.55523583	DEdeg	15.90715806	EpRA 1990	1.81
EpDE 1990	1.33	E RAdeg	4.3	E DEdeg	6.7	Posflg
Corr	0.3

SAO

SAO	106466	DelFlag		RA1950		PmRA1950	0.0065
DE1950		PmDE1950	0.065	Vmag	7.5	SpType	K0
Double code		Source	70	CatNum	28953	DM	BD+15 4251
DMcomp	A	BDsup		HD	197913	M HD	0
GC	28953	RA1950rad	5.42749695	DE1950rad	0.27441254	PmRA2000	0.0066
PmDE2000	0.063

Hipparcos

Catalog	H	HIP	102490	Proxy	H	RAhms	20 46 13.25
DEdms	+15 54 25.8	Vmag	7.09	VarFlag		R Vmag	H
RAdeg	311.555	DEdeg	15.9072	AstroRef	A	Plx	26.15
CCDM	20462+1554	N CCDM	I	Nsys	1	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	AB
Theta	10	Rho	5.975	HD	197913	BD	BD+15 4251
CD		CP		Dm number	+15 4251	VIred	0.81
SpType	K0	R SpType		Coord arcsec 2000	204613.25+155425.8

Hipparcos 2

HIP	102490	Sn	17	So	3	Nc	2
RArad	5.4376643754	DErad	0.2776322535	Plx	27.43	PmRA	89.17
PmDE	62.44	E RArad	1.26	E DErad	0.71	E Plx	1.2
E pmRA	1.75	E pmDE	0.98	Hpmag	7.2426	E Hpmag	0.0017
SHp	0.013	VA	0	BV	0.794	E BV	0.013
VI	0.83

CCDM

Ccdm	20462+1554	RComp		Comp	A	Note1
Note2		Discov num		DRAs	1.30	DDEs	25.0
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	7.5	Sp	K0	PmNote	*
PmRA	94	PmDE	65	Dm number	+15 4251	Cat1	BD
Name2	106466	Cat2	SAO	HD	197913	M HD
ADS BDS	A14270	M ADS BDS		N IDS		IDS	20416N1532A
HIC	102490

20462+1554 Ab

Coord arcsec 2000

204613.31+155426.4

Mag

8.9

Calc delta mag

Calc coord

yes

20462+1554 B

Coord arcsec 2000	204613.39+155432.5		Mag	8.2		PmRA	96.00		PmDE	72.0
Tycho2	1634-02227-1		Calc delta mag	0.3		Calc coord	yes

Tycho2

Tycho2	1634-02227-1	Pflag		RAmdeg	311.55575434	DEmdeg	15.90897360
PmRA	99.5	PmDE	75.4	E RAmdeg	5	E DEmdeg	9
E pmRA	1.8	E pmDE	1.7	EpRAm	1991.73	EpDEm	1991.00
Num	4	Q RAmdeg	1.0	Q DEmdeg	1.1	Q pmRA	0.9
Q pmDE	1.1	BTmag	9.113	E BTmag	0.019	VTmag	8.200
E VTmag	0.013	Prox	60	TYC	T	HIP	102490
CCDM	B	RAdeg	311.55551944	DEdeg	15.90879194	EpRA 1990	1.83
EpDE 1990	1.33	E RAdeg	5.4	E DEdeg	9.3	Posflg	D
Corr	0.2

CCDM

Ccdm	20462+1554	RComp		Comp	B	Note1	*
Note2		Discov num	STF2725	DRAs	1.31	DDEs	29.4
R dRAs	10	Year	1959	Theta	008	Rho	5.8
Obs	99	Vmag	8.2	Sp		PmNote	*
PmRA	93	PmDE	37	Dm number		Cat1
Name2	106467	Cat2	SAO	HD		M HD
ADS BDS	A14270	M ADS BDS		N IDS		IDS	20416N1532B
HIC	102490