You're not logged.

Actions

Advanced Search
Go to Simbad
New report
New measure
Login

Computed Lists

Current system

15427+2618
STF 1967
Gam CrB

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.

15427+2618 STF 1967 (Gam CrB)

15^h 42^m 44.57^s +26° 17' 44.3" P.A. 110.00 sep 0.5 mag 4.04,5.60 Sp B9V+A3V dist. 44.78 pc (146.07 l.y.)

Coord 2000	15427+2618	Discov num	STF1967	Comp		Coord arcsec 2000	15 42 44.57 +26 17 44.3
Date first	1826	Date last	2015	Obs	491
Pa first	111	Pa last	110.1	P.A. Now (θ)	306.6°
Sep first	0.7	Sep last	0.476	Sep. Now (ρ)	0.11"
Mag pri	4.04	Mag sec	5.60	delta mag (ΔM)	1.56	Spectral class	B9V+A3V (blue-white/white)
Pri motion ra	-107	Sec motion ra	-107
Pri motion dec	+048	Sec motion dec	+048
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	Gam CrB	Constellation	Corona Borealis	SAO	83958	HIP	76952
Tycho2	2036-01674-1	Gaia DR2	1223128521793513984	HD	140436	HR	5849
GC	21130	ADS	9757	BD	BD+26 2722	Bayer	Gamma Coronae Borealis
Bayer name	Gam CrB	Flamsteed	8 Coronae Borealis	Flamsteed name	8 CrB	Distance	44.78
Distance ly	146.07	Bayer greek	γ CrB

ORBITAL ELEMENTS

Period (P)	91.2y	± 0.4	Periastron (T)	1931.6y	± 0.3	Semi-major axis (a)	0.729a	± 0.006
Eccentricity (e)	0.48	± 0.01	Inclination (i)	94.45°	± 0.07	Longitude of periastron (ω)	103.8°	± 0.6
Node (Ω)	111.75°	± 0.09	Notes	n		Reference	DRs2012
Equinox			Last observation	2011		Grade	2	(1=Definitive, 9=Indet.)

label	theta	rho
2000	114.8	0.721
2001	114.6	0.726
2002	114.3	0.728
2003	114.0	0.729
2004	113.8	0.727
2005	113.5	0.722
2006	113.2	0.715
2007	112.9	0.704
2008	112.6	0.690
2009	112.3	0.673
2010	112.0	0.651
2011	111.6	0.626
2012	111.3	0.595
2013	110.8	0.560
2014	110.3	0.519
2015	109.8	0.472
2016	109.0	0.419
2017	108.1	0.359
2018	106.7	0.293
2019	104.6	0.222
2020	100.1	0.145
2021	85.3	0.067
2022	342.8	0.038
2023	306.6	0.110
2024	299.7	0.188
2025	296.8	0.261
2026	295.1	0.326
2027	294.0	0.382
2028	293.1	0.430
2029	292.4	0.469
2030	291.8	0.501

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

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

WDS 15427+2618 STF 1967 (Gam CrB) : NOTES

discov_num	notes	refcode
STF1967	gam CrB = 8 CrB. A is a Delta Scuti-type variable. The RV does not
	show a variation. A few discordant measurements seem to have been
	caused by scatter from the poor lines, and the double lines reported
	from three old Yerkes plates were also found probably spurious on
	remeasurement. See Baize & Petit catalog of doubles with variable	Baz1989d
	component. Measure of 1989.388 made by MAPPIT. This measure had an	Han1989
	identification error, position error, or misprint in publication, which
	has been corrected.
	Spectral types and masses of components assigned by ten Brummelaar et
	al., based on adaptive optics observations.	TtB2000
	Calculated mass sum is 3.73 +/- 0.37 Msun, a bit low for a pair of
	early A stars.	Mut2010b
	Additional notes may be found in Duner (1876).	Du_1876
	Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
	masses of 4.18 +/- 0.30, 4.34, and 4.57 Msun, respectively.	Mlk2012

REFERENCES

refcode	metd	author	reference
Baz1989d	-	Baize, P. & Petit, M.	1989A&AS...77..497B
Baz1989d		A&AS 77, 497, 1989
DRs2012	A j	De Rosa, R.J., Patience, J., Vigan, A., Wilson, P.A., Schnieder, A.,	2012MNRAS.422.2765D
DRs2012		McConnell, N.J., Wiktorowicz, S.J., Marois, C., Song, I., Macintosh, B.,
DRs2012		Graham, J.R., Bessell, M.S., Doyon, R., & Lai, O.
DRs2012		MNRAS 422, 2765, 2012
DRs2012		(includes re-reduction of some data originally published in DRs2011)	2011MNRAS.415..854D
Du_1876	Ma -	Duner, N.C.	.
Du_1876	+orb	Mesures Microm. Lund, 1876
Han1989	Sa j	Haniff, C.A., Buscher, D.F., Christou, J.C., & Ridgway, S.T.	1989MNRAS.241P..51H
Han1989		MNRAS 241, 51P-56P, 1989
Mlk2012	not -	Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A.	2012A&A...546A..69M
Mlk2012		A&A 546, A69, 2012
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
TtB2000	Ac j	ten Brummelaar, T.A., Mason, B.D., McAlister, H.A., Roberts, L.C., Jr.,	2000AJ....119.2403T
TtB2000		Turner, N.H., Hartkopf, W.I., & Bagnuolo, W.G., Jr.
TtB2000		AJ 119, 2403, 2000 (magnitude differences from Mt. Wilson AO)

DISCOVERER

idgroup	discov	author
1	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
15427+2618	STF1967		2006	435	114	0.7	4.04	5.60	B9V+A3V	NOD	154244.57+261744.3
15427+2618	STF1967		2010	439	112	0.7	4.04	5.60	B9V+A3V	NOD	154244.57+261744.3
15427+2618	STF1967		2011	487	111	0.6	4.04	5.60	B9V A3V	NOD	154244.57+261744.3
15427+2618	STF1967		2012	483	111	0.6	4.04	5.60	B9V A3V	NOD	154244.57+261744.3
15427+2618	STF1967		2015	491	110	0.5	4.04	5.60	B9V+A3V	NO	154244.57+261744.3

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

WDS 15427+2618 STF 1967 (Gam CrB) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 15427+2618 STF 1967 (Gam CrB) : MEASURES

No records found.

WDS 15427+2618 (Gam CrB) : 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 15427+2618 (Gam CrB) : ALADIN DSS IMAGE @ 15^h 42^m 44.57^s +26° 17' 44.3"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 15427+2618 STF 1967 (Gam CrB) : 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		15427+2618	STF1967		110	0.5
Show		15430+2617	FLA 2		148	44.9	5
Show		15429+2624	BRT 167		235	3.1	7
Show		15438+2553	LDT 12		262	0.2	29
Show		15418+2647	CBL 493		33	13.3	32
Show		15419+2655	TDS9592		36	0.4	40
Show		15458+2637	COU 615		127	1.0	46
Show		15454+2538	PST 5	AB	271	10.6	54
Show		15454+2538	PST 5	AC	270	17.8	54
Show		15449+2708	CVR1645		332	3.5	59
Show		15390+2545	COU 612		342	0.3	60
Show		15455+2523	KPP3968		347	26.3	66
Show		15380+2556	TDS9569		114	0.6	67
Show		15485+2600	COU 616		163	0.8	80
Show		15371+2646	HDS2199	AB	349	0.2	81
Show		15371+2646	GII 40	AC	243	2.1	81
Show		15371+2650	GRV1211		74	29.8	82
Show		15390+2723	KPP2324		321	19.8	83
Show		15404+2500	LDS4578		80	14.9	85
Show		15474+2504	RAO 665		326	4.1	98
Show		15397+2751	KPP3963		179	7.3	102
Show		15499+2547	HLM 6		179	24.0	102
Show		15355+2647	SHN 202		-1	0.6	102
Show		15495+2528	WSI 111	Aa,Ab	307	0.2	105
Show		15495+2528	STF1977	AB	356	13.9	105
Show		15495+2528	WSI 111	Aa,C	114	0.5	105
Show		15366+2726	MLB 690		222	2.1	106
Show		15416+2803	KPP3966		55	2.0	107
Show		15358+2527	LDS4569		13	249.0	107
Show		15508+2615	TDS9657		225	0.8	109
Show		15361+2517	HDS2192		128	0.2	109
Show		15437+2424	POU3200		69	4.7	109
Show		15488+2503	DOO 60		23	28.0	111
Show		15495+2514	TDS9646		43	1.7	112
Show		15347+2655	COU 798		211	0.2	115
Show		15346+2653	UC 3029		290	54.6	116
Show		15340+2610	SLW1108		320	11.2	119
Show		15399+2423	TDS9583		230	0.5	122
Show		15339+2643	STF1955	AB	237	7.8	122
Show		15339+2643	TAR 2	AC	35	20.5	122
Show		15383+2431	ARY 11		327	151.0	123
Show		15446+2411	POU3202		299	6.8	129
Show		15456+2412	POU3203		107	16.7	132
Show		15348+2500	STT 297		332	12.8	133
Show		15513+2509	STF1981		4	12.1	135
Show		15485+2817	TDS9637		99	1.0	142
Show		15429+2355	POU3199		108	14.3	143
Show		15474+2828	TDS9623		310	2.0	145
Show		15456+2356	UC 3054		211	41.4	147
Show		15344+2445	LDS4561		287	64.8	148
Show		15498+2817	TDS9648		159	0.7	153

WDS 15427+2618 : COMPONENTS

	A
B	pa=112.2° sep=0.43"

15427+2618 A

Componente originario normalizzato	AB	Name	Gam CrB	Coord arcsec 2000	154244.57+261744.3	Mag	4.04
Spectral class	B9V (blue-white)	PmRA	-107.00	PmDE	48.0	SAO	83958
HIP	76952	Tycho2	2036-01674-1	HD	140436	HR	5849
GC	21130	BD	BD+26 2722	Bayer	Gamma Coronae Borealis	Bayer name	Gam
Flamsteed	8 Coronae Borealis	Flamsteed name	8 CrB

Tycho2

Tycho2	2036-01674-1	Pflag		RAmdeg	235.68572161	DEmdeg	26.29562122
PmRA	-107.0	PmDE	47.8	E RAmdeg	3	E DEmdeg	3
E pmRA	0.8	E pmDE	0.8	EpRAm	1991.04	EpDEm	1991.44
Num	15	Q RAmdeg	1.7	Q DEmdeg	1.3	Q pmRA	1.6
Q pmDE	1.1	BTmag	3.866	E BTmag	0.014	VTmag	3.851
E VTmag	0.009	Prox	999	TYC	T	HIP	76952
CCDM	AB	RAdeg	235.68601083	DEdeg	26.29551056	EpRA 1990	1.28
EpDE 1990	1.66	E RAdeg	3.2	E DEdeg	3.2	Posflg	P
Corr	0.0

SAO

SAO	83958	DelFlag		RA1950		PmRA1950	-0.0079
DE1950		PmDE1950	0.043	Vmag	3.9	SpType	A0
Double code		Source	71	CatNum	581	DM	BD+26 2722
DMcomp		BDsup		HD	140436	M HD	0
GC	21130	RA1950rad	4.10432091	DE1950rad	0.46168986	PmRA2000	-0.0078
PmDE2000	0.045

Hipparcos

Catalog	H	HIP	76952	Proxy	H	RAhms	15 42 44.64
DEdms	+26 17 43.9	Vmag	3.81	VarFlag		R Vmag	H
RAdeg	235.686	DEdeg	26.2955	AstroRef	A	Plx	22.48
CCDM	15427+2618	N CCDM	I	Nsys	1	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	AB
Theta	118	Rho	0.609	HD	140436	BD	BD+26 2722
CD		CP		Dm number	+26 2722	VIred	0.02
SpType	A1Vs	R SpType		Coord arcsec 2000	154244.64+261743.9

Hipparcos 2

HIP	76952	Sn	15	So	3	Nc	2
RArad	4.113496567	DErad	0.4589433025	Plx	22.33	PmRA	-111.65
PmDE	49.52	E RArad	0.37	E DErad	0.33	E Plx	0.5
E pmRA	0.39	E pmDE	0.43	Hpmag	3.8233	E Hpmag	0.0008
SHp	0.007	VA	0	BV	0.02	E BV	0.003
VI	0.04

CCDM

Ccdm	15427+2618	RComp		Comp	A	Note1
Note2		Discov num		DRAs	2.60	DDEs	-16.1
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	4.0	Sp	A0	PmNote	*
PmRA	-102	PmDE	42	Dm number	+26 2722	Cat1	BD
Name2	+26 1504	Cat2	AGK2/3	HD	140436	M HD
ADS BDS	A 9757	M ADS BDS		N IDS		IDS	15386N2637A
HIC	76952

15427+2618 B

Componente originario normalizzato	AB		Coord arcsec 2000	154244.60+261744.1		Mag	5.6		Spectral class	A3V (white)
PmRA	-107.00		PmDE	48.0		Calc delta mag	1.56		Calc coord	yes

CCDM

Ccdm	15427+2618	RComp		Comp	B	Note1	*
Note2		Discov num	STF1967	DRAs		DDEs
R dRAs		Year	1826	Theta		Rho
Obs	99	Vmag	7.0	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A 9757	M ADS BDS		N IDS		IDS	15386N2637B
HIC	76952