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15245+3723
STF 1938 Ba,Bb

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

15245+3723 STF 1938 Ba,Bb

15^h 24^m 30.89^s +37° 20' 52.5" P.A. 2.00 sep 2.2 mag 7.09,7.63 Sp G0V dist. 36.06 pc (117.63 l.y.)

Coord 2000	15245+3723	Discov num	STF1938	Comp	Ba,Bb	Coord arcsec 2000	15 24 30.89 +37 20 52.5
Date first	1823	Date last	2020	Obs	763
Pa first	333	Pa last	2.1	P.A. Now (θ)	1°
Sep first	1.8	Sep last	2.2	Sep. Now (ρ)	2.187"
Mag pri	7.09	Mag sec	7.63	delta mag (ΔM)	0.54	Spectral class	G0V (yellow)
Pri motion ra	-154	Sec motion ra	-151
Pri motion dec	+092	Sec motion dec	+087
Notes	N O (See Notes, Orbital solution)

rPM=0.033 (< 0.3, Physical double)

This double is physical.

15245+3723 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		64686	15 24 30 +37 22 37	CHR 181 Aa,Ab	2012	47	188	0.1	4.31			Y
Show	Alkalurops	64686	15 24 30 +37 22 37	STFA 28 AB	2020	154	171	109.2	4.33	7.09	2.76
Show		64687	15 24 31 +37 20 52	STF 1938 Ba,Bb	2020	763	2	2.2	7.09	7.63	0.54	Y	<===

Quadruple system
2 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Bootes	SAO	64687	HIP	75415	Tycho2	2570-01518-1
Gaia DR2	1387349065960639232	HD	137392	HR	5734	GC	20725
ADS	9626	GL	NN 3904B	BD	BD+37 2637	Bayer	Mu 2 Bootis
Bayer name	Mu2 Boo	Flamsteed	51 Bootis	Flamsteed name	51 Boo	Distance	36.06
Distance ly	117.63	Bayer greek	μ² Boo

ORBITAL ELEMENTS

Period (P)	256.5y	Periastron (T)	1864.25y	Semi-major axis (a)	1.45a
Eccentricity (e)	0.579	Inclination (i)	134.2°	Longitude of periastron (ω)	338.7°
Node (Ω)	176.2°	Notes	n	Reference	Sca2013a
Equinox	2000	Last observation	2012	Grade	2	(1=Definitive, 9=Indet.)

label	theta	rho
2000	8.9	2.228
2001	8.5	2.229
2002	8.2	2.230
2003	7.8	2.231
2004	7.5	2.231
2005	7.2	2.231
2006	6.8	2.231
2007	6.5	2.231
2008	6.2	2.230
2009	5.8	2.229
2010	5.5	2.228
2011	5.1	2.227
2012	4.8	2.225
2013	4.5	2.223
2014	4.1	2.220
2015	3.8	2.218
2016	3.4	2.215
2017	3.1	2.212
2018	2.8	2.208
2019	2.4	2.205
2020	2.1	2.200
2021	1.7	2.196
2022	1.4	2.192
2023	1.0	2.187
2024	0.7	2.181
2025	0.3	2.176
2026	360.0	2.170
2027	359.6	2.164
2028	359.2	2.157
2029	358.9	2.151
2030	358.5	2.144

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

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

WDS 15245+3723 STF 1938 Ba,Bb : NOTES

discov_num	notes	refcode
CHR 181	Aa,Ab: mu 1 Boo = 51 Boo A = Alkalurops. SB, P=298.75d.
	More speckle observations are needed to confirm preliminary orbit.
	Aa,Ab: Calculated mass sum is 3.24 +/- 0.23 Msun. Absorption lines too
	broad and blended for RV measurements.	Mut2010b
	Aa,Ab: Orbital elements provided in Guerrero et al. (2021) match	Gur2021
	measures and previous orbits of STF1938Ba,Bb. The orbit is therefore
	attributed to STF1938Ba,Bb in ORB6.
STF1938	Ba,Bb: mu 2 Boo = 51 Boo B.
	See Baize & Petit (1989) catalog of doubles with variable component.	Baz1989d
STFA 28	AB: HJL 221.	HJL1986
	AB: H 6 17. STF1938Ba,Bb: H 1 17.	MEv2010
	AB: SHY 275. Bayesian analysis by Shaya & Olling (2011) indicates very
	high (near 100%) probability pair is physical.	Shy2011
	AB: Kiyaeva et al. (2014) find probably significant differences in the
	elemental abundances of the Aa,Ab and Ba,Bb subsystems, and suggest
	this quadruple is instead a close passage of two separate binaries.	Kiy2014

REFERENCES

refcode	metd	author	reference
Baz1989d	-	Baize, P. & Petit, M.	1989A&AS...77..497B
Baz1989d		A&AS 77, 497, 1989
Gur2021	S+ j	Guerrero, C.A., Zepeda, C.E., Souza, T.B., Najera, M.R., Borges Fernandes, M.,	2021AJ....161..253G
Gur2021	+orb	Hernandez-Aguila, J.B., Carvajal, J.C., Castro-Chacon, J.H., Hernandez-Valencia, B.,
Gur2021	+not	Reyes-Ruiz, M., Sanchez, E. & Silva, J.S.
Gur2021		AJ 161, 253, 2021
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)
Kiy2014	Po u	Kiyaeva, O.V., Zhuchkov, R.Ya., Malogolovets, E.V., Orlov, V.V., Glukhova, A.V.,	2014ARep...58..835K
Kiy2014	+S	Balega, Yu., Yu. & Bikmaev, I.F.
Kiy2014	+orb	ARep 58, 835, 2014 (SvA 91, 943, 2014)
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Mut2010b	Kp -	Muterspaugh, M.W., Hartkopf, W.I., Lane. B.F., O'Connell, J., Williamson, M.,	2010AJ....140.1623M
Mut2010b		Kulkarni, S.R., Konacki, M., Burke, B.F., Colavita, M.M., Shao, M., &
Mut2010b		Wiktorowicz, S.J.
Mut2010b		AJ 140, 1623, 2010
Sca2013a	orb -	Scardia, M., Prieur, J.-L., Pansecchi, L., & Argyle, R.W.	2013IAUDS.179....1S
Sca2013a		Inf. Circ. 179, 1, 2013
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.)

DISCOVERER

idgroup	discov	author
1	CHR	Center for High Ang. Res. Astronomy (speckle interferometry systems)
3	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
15245+3723	STF1938	Ba,Bb	2007	709	6	2.2	7.09	7.63	G0V	NO	152430.97+372049.5
15245+3723	STF1938	Ba,Bb	2008	711	6	2.2	7.09	7.63	G0V	NO	152430.97+372049.5
15245+3723	STF1938	Ba,Bb	2009	712	6	2.2	7.09	7.63	G0V	NO	152430.97+372049.5
15245+3723	STF1938	Ba,Bb	2010	718	6	2.3	7.09	7.63	G0V	NO	152430.97+372049.5
15245+3723	STF1938	Ba,Bb	2011	723	6	2.4	7.09	7.63	G0V	NO	152430.97+372049.5
15245+3723	STF1938	Ba,Bb	2013	736	5	2.3	7.09	7.63	G0V	NO	152430.97+372049.5
15245+3723	STF1938	Ba,Bb	2014	728	4	2.3	7.09	7.63	G0V	NO	152430.97+372049.5
15245+3723	STF1938	Ba,Bb	2015	731	3	2.3	7.09	7.63	G0V	NO	152430.97+372049.5
15245+3723	STF1938	Ba,Bb	2016	743	4	2.3	7.09	7.63	G0V	NO	152430.89+372052.5
15245+3723	STF1938	Ba,Bb	2017	745	3	2.3	7.09	7.63	G0V	NO	152430.89+372052.5
15245+3723	STF1938	Ba,Bb	2018	751	4	2.3	7.09	7.63	G0V	NO	152430.89+372052.5
15245+3723	STF1938	Ba,Bb	2019	757	3	2.3	7.09	7.63	G0V	NO	152430.89+372052.5
15245+3723	STF1938	Ba,Bb	2020	762	2	2.2	7.09	7.63	G0V	NO	152430.89+372052.5

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

WDS 15245+3723 STF 1938 Ba,Bb : VISUAL OBSERVATIONS REPORTS

Show	date	username	difficulty	separation	pa_estim	interest	notes
Show	23/06/16	Daedalus1	mean difficulty	separated	2		Yellow-white stars; primary is slightly brighter.

WDS 15245+3723 STF 1938 Ba,Bb : MEASURES

Records found: 1

Show	date	username	difficulty	sep	sep_sigma	pa	pa_sigma	delta_mag	#	notes
Show	23/06/16	Daedalus1	mean difficulty	2.27	0.07	2.00	0.00	0.53	12	Seeing: Pickering 7, good

WDS 15245+3723 : 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 15245+3723 : ALADIN DSS IMAGE @ 15^h 24^m 30.89^s +37° 20' 52.5"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 15245+3723 STF 1938 Ba,Bb : 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		15245+3723	STF1938	Ba,Bb	2	2.2	1
Show	Alkalurops	15245+3723	CHR 181	Aa,Ab	188	0.1	2
Show	Alkalurops	15245+3723	STFA 28	AB	171	109.2	2
Show		15245+3726	HEI 783		3	1.8	6
Show		15230+3710	SLW1087		218	13.1	22
Show		15213+3710	GRV1208		141	20.0	40
Show		15233+3619	A 1367	AB	156	0.6	65
Show		15233+3619	A 1367	AB,C	156	9.1	65
Show		15197+3646	CVR 783		68	8.5	68
Show		15282+3822	STF1947		26	6.8	75
Show		15236+3838	RAO 593			0.6	78
Show		15205+3826	TDS9493		170	0.4	81
Show		15200+3614	MUG 15		164	91.8	87
Show		15188+3627	HDS2152	AB	223	1.1	88
Show		15188+3627	GII 219	Aa,Ab	115	0.2	88
Show		15307+3810	HU 1163		178	0.3	89
Show		15317+3746	TDS9538		243	2.0	90
Show		15280+3844	CVR1632		16	3.5	94
Show		15203+3559	HJ 251		240	22.1	97
Show		15157+3642	ALI 601		293	4.4	113
Show		15339+3755	BEU 20		99	0.8	117
Show		15151+3650	STT 295		153	0.4	118
Show		15174+3556	LDS5165		26	10.4	121
Show		15163+3831	COU1137		47	0.6	122
Show		15338+3818	UC 210		211	68.5	124
Show		15333+3827	HJ 2786		170	26.8	124
Show		15317+3903	KZA 96		88	43.5	126
Show		15216+3922	CBL 487		40	25.1	126
Show		15149+3818	STF1926	AB	222	0.3	128
Show		15149+3818	GII 218	Aa,Ab	138	0.1	128
Show		15272+3930	STF1946		344	7.5	133
Show		15355+3803	KPP3961		95	28.5	137
Show		15154+3558	HU 1273		83	0.1	138
Show		15346+3610	LDS4563		67	91.8	141
Show		15243+3942	LEP 146		138	6.5	142
Show		15364+3723	HDS2195	Aa,Ab	63	0.1	143
Show		15364+3723	HU 1166	AB	143	4.2	143
Show		15364+3723	FOX 190	AC	271	59.6	143
Show		15311+3925	KZA 94		257	15.6	147
Show		15368+3717	KPP3294		119	1.3	147
Show		15348+3601	SLW1111		186	20.0	148
Show		15368+3735	LDS4572		89	15.3	148
Show		15124+3650	KPP 762		270	6.6	149
Show		15208+3459	HO 62		103	1.5	149
Show		15213+3945	LDT 10		91	0.2	150
Show		15150+3541	HJ 570		299	14.9	151
Show		15304+3935	LAW 23	Aa,Ab	94	0.2	152
Show		15304+3935	LAW 23	AB	161	31.1	152
Show		15371+3748	JNN 105		78	0.3	152
Show		15226+3953	WIS 284		249	999.9	154
Show		15120+3645	WIS 282		294	738.5	155

WDS 15245+3723 : COMPONENTS

	A	Ab	B
Ab	pa=186.2° sep=0.07"
B	pa=171.3° sep=105.83"	pa=171.2° sep=105.76"
Bb	pa=171.0° sep=103.67"	pa=171.0° sep=103.60"	pa=1.7° sep=2.20"

15245+3723 A

Common name	Alkalurops	Meaning	crook	Other names	INKALUNIS, ICALURUS, CLAVA, VENABULUM	Coord arcsec 2000	152429.54+372237.1
Mag	4.33	Spectral class	F2IVa (yellow-white)	PmRA	-147.00	PmDE	80.0
SAO	64686	HIP	75411	Tycho2	2570-01521-1	HD	137391
HR	5733	GC	20724	BD	BD+37 2636	Bayer	Mu 1 Bootis
Bayer name	Mu1 Boo	Flamsteed	51 Bootis	Flamsteed name	51 Boo	FK5	568

Tycho2

Tycho2	2570-01521-1	Pflag		RAmdeg	231.12261791	DEmdeg	37.37716970
PmRA	-146.9	PmDE	85.5	E RAmdeg	3	E DEmdeg	3
E pmRA	0.6	E pmDE	0.7	EpRAm	1991.19	EpDEm	1991.35
Num	20	Q RAmdeg	1.0	Q DEmdeg	1.7	Q pmRA	1.0
Q pmDE	1.7	BTmag	4.667	E BTmag	0.014	VTmag	4.334
E VTmag	0.009	Prox	999	TYC	T	HIP	75411
CCDM		RAdeg	231.12304972	DEdeg	37.37697139	EpRA 1990	1.59
EpDE 1990	1.65	E RAdeg	3.3	E DEdeg	3.3	Posflg
Corr	-0.2

SAO

SAO	64686	DelFlag		RA1950		PmRA1950	-0.0124
DE1950		PmDE1950	0.084	Vmag	4.5	SpType	F0
Double code		Source	74	CatNum	568	DM	BD+37 2636
DMcomp		BDsup		HD	137391	M HD	0
GC	20724	RA1950rad	4.02560153	DE1950rad	0.65539774	PmRA2000	-0.0121
PmDE2000	0.087

Hipparcos

Catalog	H	HIP	75411	Proxy		RAhms	15 24 29.54
DEdms	+37 22 37.1	Vmag	4.31	VarFlag		R Vmag	G
RAdeg	231.123	DEdeg	37.377	AstroRef		Plx	26.96
CCDM	15245+3722	N CCDM	I	Nsys	2	Ncomp	1
MultFlag	G	Source		Qual		M HIP
Theta		Rho		HD	137391	BD	BD+37 2636
CD		CP		Dm number	+37 2636	VIred	0.35
SpType	F0V	R SpType		Coord arcsec 2000	152429.54+372237.1

Hipparcos 2

HIP	75411	Sn	1	So	1	Nc	1
RArad	4.0338584954	DErad	0.6523510313	Plx	28.83	PmRA	-146.73
PmDE	79.85	E RArad	0.51	E DErad	0.59	E Plx	0.74
E pmRA	0.66	E pmDE	0.77	Hpmag	4.3826	E Hpmag	0.0005
SHp	0.005	VA	0	BV	0.309	E BV	0.008
VI	0.35

15245+3723 Ab

Coord arcsec 2000

152429.54+372237.0

Calc delta mag

4.31

Calc coord

yes

15245+3723 B

Coord arcsec 2000	152430.89+372052.5	Coord calc	152430.70+372049.3	Mag	7.09	Mag composta	7.09
Spectral class	G0V (yellow)	PmRA	-154.00	PmDE	92.0	SAO	64687
HIP	75415	Tycho2	2570-01518-1	HD	137392	HR	5734
GC	20725	BD	BD+37 2637	Bayer	Mu 2 Bootis	Bayer name	Mu2 Boo
Flamsteed	51 Bootis	Flamsteed name	51 Boo	Calc delta mag	2.78

Tycho2

Tycho2	2570-01518-1	Pflag	P	RAmdeg	231.12862441	DEmdeg	37.34747199
PmRA	-151.3	PmDE	86.9	E RAmdeg	4	E DEmdeg	5
E pmRA	2.9	E pmDE	2.8	EpRAm	1991.62	EpDEm	1991.52
Num	3	Q RAmdeg	3.2	Q DEmdeg	0.2	Q pmRA	3.3
Q pmDE	0.1	BTmag	7.731	E BTmag	0.016	VTmag	7.092
E VTmag	0.010	Prox	22	TYC	T	HIP	75415
CCDM	B	RAdeg	231.12902222	DEdeg	37.34710306	EpRA 1990	1.65
EpDE 1990	1.57	E RAdeg	4.3	E DEdeg	4.5	Posflg	D
Corr	-0.2

SAO

SAO	64687	DelFlag		RA1950		PmRA1950	-0.0124
DE1950		PmDE1950	0.091	Vmag	6.7	SpType	K0
Double code		Source	70	CatNum	20725	DM	BD+37 2637
DMcomp		BDsup		HD	137392	M HD	0
GC	20725	RA1950rad	4.02570389	DE1950rad	0.65488093	PmRA2000	-0.0121
PmDE2000	0.094

Hipparcos

Catalog	H	HIP	75415	Proxy	H	RAhms	15 24 30.97
DEdms	+37 20 49.5	Vmag	6.51	VarFlag		R Vmag	G
RAdeg	231.129	DEdeg	37.3471	AstroRef	B	Plx	26.82
CCDM	15245+3722	N CCDM	I	Nsys	2	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	BC
Theta	12	Rho	2.232	HD	137392	BD	BD+37 2637
CD		CP		Dm number	+37 2637	VIred	0.64
SpType	G1V	R SpType		Coord arcsec 2000	152430.97+372049.5

Hipparcos 2

HIP	75415	Sn	15	So	3	Nc	2
RArad	4.0339627643	DErad	0.6518297443	Plx	27.73	PmRA	-140.08
PmDE	84.78	E RArad	0.41	E DErad	0.55	E Plx	0.65
E pmRA	0.57	E pmDE	0.83	Hpmag	6.6404	E Hpmag	0.0008
SHp	0.01	VA	0	BV	0.6	E BV	0.042
VI	0.64

15245+3723 Bb

Coord arcsec 2000	152430.90+372054.7		Mag	7.63		PmRA	-151.00		PmDE	87.0
Calc delta mag	3.32		Calc coord	yes