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

15155+3319 STFA 27 AB (Del Boo)

15^h 15^m 30.16^s +33° 18' 53.4" P.A. 78.00 sep 105.0 mag 3.56,7.89 Sp G8III+G0V dist. 37.34 pc (121.8 l.y.)

Coord 2000	15155+3319	Discov num	STFA 27	Comp	AB	Coord arcsec 2000	15 15 30.16 +33 18 53.4
Date first	1780	Date last	2021	Obs	128
Pa first	84	Pa last	77.7	P.A. Now (θ)	77.7°
Sep first	135.0	Sep last	104.978	Sep. Now (ρ)	104.978"
Mag pri	3.56	Mag sec	7.89	delta mag (ΔM)	4.33	Spectral class	G8III+G0V (yellow/yellow)
Pri motion ra	+085	Sec motion ra	+082
Pri motion dec	-112	Sec motion dec	-110
Notes	N O T (See Notes, Orbital solution, Parallax indicates physical)

rPM=0.026 (< 0.3, Physical double)

This double is physical.

15155+3319 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Del Boo	64589	15 15 30 +33 18 53	STFA 27 AB	2021	128	78	105.0	3.56	7.89	4.33	Y	<===
Show		64589	15 15 30 +33 18 53	SMR 31 AC	2018	9	5	93.2	3.56	14.30	10.74

Triple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	Del Boo	Var name	NSV7002 Boo	Constellation	Bootes	SAO	64589
HIP	74666	Tycho2	2566-01639-1	Gaia DR2	1278391075716738560	HD	135722
HR	5681	GC	20523	ADS	9559	BD	BD+33 2561
Bayer	Delta Bootis	Bayer name	Del Boo	Flamsteed	49 Bootis	Flamsteed name	49 Boo
FK5	563	Distance	37.34	Distance ly	121.8	Bayer greek	δ Boo

SUSPECTED ORBITAL ELEMENTS

SUSPECTED ORBITAL ELEMENTS SOLUTION #1

Identifier	15155+3319
coord_arcsec_2000	151530.16+331853.4

Period (P)	760c	Periastron (T)	22775y	Semi-major axis (a)	78a
Eccentricity (e)	0.99	Inclination (i)	74°	Longitude of periastron (ω)	136°
Node (Ω)	91°	Notes	n	Reference	Kis2009
Equinox		Last observation	2005	Grade	5	(1=Definitive, 9=Indet.)

label	theta	rho
2000	77.6	104.670
2001	77.6	104.668
2002	77.6	104.666
2003	77.6	104.665
2004	77.6	104.663
2005	77.6	104.661
2006	77.6	104.660
2007	77.6	104.658
2008	77.6	104.656
2009	77.6	104.655
2010	77.6	104.653
2011	77.6	104.651
2012	77.6	104.650
2013	77.6	104.648
2014	77.6	104.646
2015	77.6	104.645
2016	77.6	104.643
2017	77.6	104.641
2018	77.6	104.640
2019	77.6	104.638
2020	77.6	104.636
2021	77.6	104.635
2022	77.6	104.633
2023	77.6	104.632
2024	77.6	104.630
2025	77.6	104.628
2026	77.6	104.627
2027	77.6	104.625
2028	77.6	104.623
2029	77.6	104.622
2030	77.6	104.620

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

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

SUSPECTED ORBITAL ELEMENTS

SUSPECTED ORBITAL ELEMENTS SOLUTION #2

Identifier	15155+3319
coord_arcsec_2000	151530.16+331853.4

Period (P)	760c	Periastron (T)	39773y	Semi-major axis (a)	78a
Eccentricity (e)	0.73	Inclination (i)	86°	Longitude of periastron (ω)	218°
Node (Ω)	75°	Notes	n	Reference	Kis2009
Equinox		Last observation	2005	Grade	5	(1=Definitive, 9=Indet.)

label	theta	rho
2000	78.1	106.135
2001	78.1	106.133
2002	78.1	106.131
2003	78.1	106.130
2004	78.1	106.128
2005	78.1	106.127
2006	78.1	106.125
2007	78.1	106.123
2008	78.1	106.122
2009	78.1	106.120
2010	78.1	106.119
2011	78.1	106.117
2012	78.1	106.116
2013	78.1	106.114
2014	78.1	106.112
2015	78.1	106.111
2016	78.1	106.109
2017	78.1	106.108
2018	78.1	106.106
2019	78.1	106.104
2020	78.1	106.103
2021	78.1	106.101
2022	78.1	106.100
2023	78.1	106.098
2024	78.2	106.096
2025	78.2	106.095
2026	78.2	106.093
2027	78.2	106.092
2028	78.2	106.090
2029	78.2	106.088
2030	78.2	106.087

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

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

WDS 15155+3319 STFA 27 AB (Del Boo) : NOTES

discov_num	notes	refcode
STFA 27	49 Boo = del Boo. STTA136. A is a spectroscopic binary.
	Mk III Limb-darkened diameter 2.75 +/- 0.04 mas.	MkT2001
	Mk III Limb-darkened diameter 2.764 +/- 0.030 mas.	MkT2003
	NPOI Limb-darkened diameter 2.74 +/- 0.03 mas,	NOI1999
	R = 10.5 +/- 0.2 \rsun.
	NPOI Limb-darkened diameter 2.76 +/- 0.03 mas.	NOI2001b
	B is BD+33@2562.
	HJL 216.	HJL1986
	SHY 270. Bayesian analysis by Shaya & Olling (2011) indicates very	Shy2011
	high (near 100%) probability pair is physical.
	H 6 16.	MEv2010
	Toyota et al. (2009) monitored the RV of the A component every 1-2
	months between 2003 Mar - 2007 Nov, using a high-dispersion echelle
	(precision ~10 m/s). Standard deviation of radial velocities <40 m/s
	and velocities show no periodic variation. This result rejects the
	association of a planet of mass > 1.8 Mjup	Toy2009

REFERENCES

refcode	metd	author	reference
HJL1986	Pa -	Halbwachs, J.L.	1986A&AS...66..131H
HJL1986		A&AS 66, 131, 1986
HJL1986		(Possible CPM pairs from AGK2/3. Coarse astrometry, incl. mean 1950 dates, added
HJL1986		only for previously unknown pairs. Table 1: HJL 1 - 326, Table 2: HJL1001 - 1113)
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
MkT2001	not j	Nordgren, T.E., Sudol, J.J. & Mozurkewich, D.	2001AJ....122.2707N
MkT2001		AJ 122, 2707, 2001	.
MkT2003	Km -	Mozurkewich, D., Armstrong, J.T., Hindsley, R., Quirrenbach, A., Hummel, C.A.,	2003AJ....126.2502M
MkT2003	+not	Hutter, D., Johnston, K.J., Hajian, A., Elias, N.M., II, Buscher, D., & Simon, R.
MkT2003		AJ 126, 2502, 2003
NOI1999	not j	Nordgren, T.E., Germain, M.E., Benson, J.A., Mozurkewich, D., Sudol, J.J., Elias,	1999AJ....118.3032N
NOI1999		II, N.M., Hajian, A.R., White, N.M., Hutter, D.J., Johnston, K.J., Gauss, F.S.,	.
NOI1999		Armstrong, J.T., Pauls, T.A. & Rickard, L.J.	.
NOI1999		AJ 118, 3032, 1999	.
NOI2001b	not j	Nordgren, T.E., Sudol, J.J. & Mozurkewich, D.	2001AJ....122.2707N
NOI2001b		AJ 122, 2707, 2001	.
Shy2011	-	Shaya, E.J. & Olling, R.	2011ApJS..192....2S
Shy2011		ApJS 192, 2, 2011
Shy2011		(Statistical analysis of probability that wide Hipparcos pairs are physical. Pairs
Shy2011		added to WDS only if probability 90% or greater.)
Toy2009	rv -	Toyota, E., Itoh, Y., Ishiguma, S., Urakawa, S., Murata, D., Oasa, Y.,	2008PASJ...61...19T
Toy2009		Matsuyama, H., Funayama, H., Sato, B., & Mukai, T.
Toy2009		PASJ 61, 19, 2009

DISCOVERER

idgroup	discov	author
1	SMR	Schlimmer, J.
56	STF	Struve, F.G.W.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
15155+3319	STFA 27	AB	2012	107	78	104.6	3.56	7.89	G8IIICN-1	NODV	151530.16+331853.4
15155+3319	STFA 27	AB	2013	108	79	104.7	3.56	7.89	G8IIICN-1	NODV	151530.16+331853.4
15155+3319	STFA 27	AB	2015	109	78	106.3	3.56	7.89	G8IIICN-1	NODV	151530.16+331853.4
15155+3319	STFA 27	AB	2017	117	78	105.0	3.56	7.89	G8IIICN-1	NO V	151530.16+331853.4
15155+3319	STFA 27	AB	2020	124	78	105.3	3.56	7.89	G8IIICN-1	NO V	151530.16+331853.4
15155+3319	STFA 27	AB	2021	128	78	105.0	3.56	7.89	G8IIICN-1	NO V	151530.16+331853.4

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

WDS 15155+3319 STFA 27 AB (Del Boo) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 15155+3319 STFA 27 AB (Del Boo) : MEASURES

No records found.

WDS 15155+3319 (Del Boo) : 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 15155+3319 (Del Boo) : ALADIN DSS IMAGE @ 15^h 15^m 30.16^s +33° 18' 53.4"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 15155+3319 STFA 27 AB (Del Boo) : 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		15155+3319	STFA 27	AB	78	105.0
Show		15155+3319	SMR 31	AC	5	93.2
Show		15151+3318	SMR 32	AB	336	27.5	5
Show		15151+3318	SMR 32	AC	70	37.1	5
Show		15151+3318	SMR 32	BC	105	47.6	6
Show		15144+3301	OSO 62		301	20.1	23
Show		15166+3339	STF1929		8	6.5	25
Show		15163+3245	UC 2974		116	53.9	36
Show		15175+3241	COU 793		61	1.5	47
Show		15181+3245	COU 794		97	0.1	48
Show		15135+3244	ES 2476		211	2.6	49
Show		15162+3418	A 1366		77	3.8	60
Show		15205+3320	TDS9494		197	0.9	63
Show		15191+3404	LDS5169		107	7.8	64
Show		15202+3244	LDS5172		77	20.0	69
Show		15121+3419	ES 2417		169	4.3	75
Show		15111+3229	COU 792		85	0.6	75
Show		15129+3430	UC 2960	AB	268	46.3	79
Show		15129+3430	KPP4383	AC	321	1.7	79
Show		15092+3304	HJ 566		285	23.5	82
Show		15153+3158	LDS4541		252	3.4	82
Show		15127+3440	TDS9446	AB	3	1.4	89
Show		15127+3440	SCA 198	AC	108	6.3	89
Show		15141+3147	STT 292		158	118.0	94
Show		15175+3148	SLW1076		125	109.5	94
Show		15080+3257	SLW1063	BC	46	126.3	97
Show		15080+3257	UC 2936	AB	14	15.5	97
Show		15136+3453	HO 60		66	0.2	97
Show		15203+3203	TOK 300		305	343.0	98
Show		15099+3208	HJ 2769		22	15.7	99
Show		15181+3452	HJ 571		221	10.1	100
Show		15215+3426	TDS9496		22	0.6	100
Show		15129+3145	HJ 569		68	13.5	101
Show		15095+3208	HJ 2767		263	11.5	103
Show		15093+3429	TDS9418		304	0.9	105
Show		15181+3507	HO 61		256	2.4	114
Show		15224+3210	COU 795		144	0.7	114
Show		15208+3459	HO 62		103	1.5	120
Show		15060+3340	DEA 85		69	5.1	121
Show		15207+3133	KZA 80		54	25.2	125
Show		15054+3343	CVR1616		140	4.1	129
Show		15195+3120	KZA 79		30	44.3	130
Show		15208+3129	LEP 74		326	999.9	130
Show		15092+3508	COU 972		144	1.4	135
Show		15152+3103	TDS9466		5	0.5	137
Show		15150+3541	HJ 570		299	14.9	143
Show		15067+3145	TDS9407		222	0.5	146
Show		15126+3057	CRB 109		240	41.6	147
Show		15246+3147	LEP 145		251	4.9	148
Show		15263+3420	HJL1090		313	152.6	148
Show		15049+3428	STF1908	AB	152	1.3	149

WDS 15155+3319 : COMPONENTS

	A	B
B	pa=75.4° sep=88.58"
C	pa=4.0° sep=93.09"	pa=311.7° sep=106.02"

15155+3319 A

Name	Del Boo	Coord arcsec 2000	151530.16+331853.4	Mag	3.56	Spectral class	G8III (yellow)
PmRA	85.00	PmDE	-112.0	SAO	64589	HIP	74666
Tycho2	2566-01639-1	HD	135722	HR	5681	GC	20523
BD	BD+33 2561	Bayer	Delta Bootis	Bayer name	Del	Flamsteed	49 Bootis
Flamsteed name	49 Boo	FK5	563

Tycho2

Tycho2	2566-01639-1	Pflag		RAmdeg	228.87567834	DEmdeg	33.31483226
PmRA	84.7	PmDE	-110.9	E RAmdeg	3	E DEmdeg	3
E pmRA	0.7	E pmDE	0.7	EpRAm	1991.27	EpDEm	1991.40
Num	23	Q RAmdeg	0.7	Q DEmdeg	1.0	Q pmRA	0.7
Q pmDE	1.1	BTmag	4.669	E BTmag	0.014	VTmag	3.563
E VTmag	0.009	Prox	999	TYC	T	HIP	74666
CCDM		RAdeg	228.87544306	DEdeg	33.31508722	EpRA 1990	1.65
EpDE 1990	1.72	E RAdeg	3.2	E DEdeg	3.1	Posflg
Corr	-0.1

SAO

SAO	64589	DelFlag		RA1950		PmRA1950	0.0066
DE1950		PmDE1950	-0.116	Vmag	3.5	SpType	K0
Double code		Source	74	CatNum	563	DM	BD+33 2561
DMcomp		BDsup		HD	135722	M HD	0
GC	20523	RA1950rad	3.98583144	DE1950rad	0.58469112	PmRA2000	0.0069
PmDE2000	-0.112

Hipparcos

Catalog	H	HIP	74666	Proxy		RAhms	15 15 30.10
DEdms	+33 18 54.4	Vmag	3.46	VarFlag		R Vmag	H
RAdeg	228.875	DEdeg	33.3151	AstroRef		Plx	27.94
CCDM	15156+3319	N CCDM	I	Nsys	2	Ncomp	1
MultFlag		Source		Qual		M HIP
Theta		Rho		HD	135722	BD	BD+33 2561
CD		CP		Dm number	+33 2561	VIred	0.96
SpType	G8III	R SpType		Coord arcsec 2000	151530.10+331854.4

Hipparcos 2

HIP	74666	Sn	5	So	0	Nc	1
RArad	3.994629874	DErad	0.5814582287	Plx	26.78	PmRA	84.74
PmDE	-111.58	E RArad	0.09	E DErad	0.11	E Plx	0.16
E pmRA	0.1	E pmDE	0.13	Hpmag	3.6268	E Hpmag	0.0003
SHp	0.004	VA	0	BV	0.961	E BV	0.003
VI	0.96

15155+3319 B

Coord arcsec 2000	151537.00+331915.8	Mag	7.89	Spectral class	G0V (yellow)	PmRA	82.00
PmDE	-110.0	HIP	74674	Tycho2	2566-00246-1	BD	BD+33 2562
Calc delta mag	4.33	Calc coord	yes

Tycho2

Tycho2	2566-00246-1	Pflag		RAmdeg	228.90978680	DEmdeg	33.32092225
PmRA	83.7	PmDE	-109.5	E RAmdeg	5	E DEmdeg	4
E pmRA	1.5	E pmDE	1.5	EpRAm	1991.48	EpDEm	1991.65
Num	7	Q RAmdeg	0.2	Q DEmdeg	0.8	Q pmRA	0.3
Q pmDE	0.7	BTmag	8.527	E BTmag	0.016	VTmag	7.894
E VTmag	0.011	Prox	999	TYC	T	HIP	74674
CCDM		RAdeg	228.90955472	DEdeg	33.32117111	EpRA 1990	1.66
EpDE 1990	1.82	E RAdeg	5.3	E DEdeg	4.4	Posflg
Corr	-0.1

Hipparcos

Catalog	H	HIP	74674	Proxy		RAhms	15 15 38.29
DEdms	+33 19 16.3	Vmag	7.8	VarFlag		R Vmag	H
RAdeg	228.91	DEdeg	33.3212	AstroRef		Plx	27.61
CCDM	15156+3319	N CCDM	I	Nsys	2	Ncomp	1
MultFlag		Source		Qual		M HIP
Theta		Rho		HD		BD	BD+33 2562
CD		CP		Dm number	+33 2562	VIred	0.95
SpType	G0Vvar	R SpType		Coord arcsec 2000	151538.29+331916.3

Hipparcos 2

HIP	74674	Sn	5	So	0	Nc	1
RArad	3.9952252483	DErad	0.5815644677	Plx	27.05	PmRA	83.48
PmDE	-110.41	E RArad	0.38	E DErad	0.46	E Plx	0.73
E pmRA	0.39	E pmDE	0.54	Hpmag	7.929	E Hpmag	0.0013
SHp	0.016	VA	0	BV	0.624	E BV	0.012
VI	0.69

15155+3319 C

Coord arcsec 2000	151530.68+332026.3		Mag	14.3		Spectral class	1		PmRA	23.00
PmDE	-31.0		Calc delta mag	10.74		Calc coord	yes