17349+1234 MCY 4 (Rasalhague)

17^h 34^m 56.06^s +12° 33' 36.1" P.A. 260.00 sep 0.3 mag 2.10,5.00 Sp A5III dist. 14.9 pc (48.6 l.y.)

Coord 2000	17349+1234	Discov num	MCY 4	Comp		Coord arcsec 2000	17 34 56.06 +12 33 36.1
Date first	1982	Date last	2021	Obs	27
Pa first	243	Pa last	260	P.A. Now (θ)	249.6°
Sep first	0.8	Sep last	0.343	Sep. Now (ρ)	0.637"
Mag pri	2.10	Mag sec	5.00	delta mag (ΔM)	2.9	Spectral class	A5III (white)
Pri motion ra	+110	Sec motion ra
Pri motion dec	-223	Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Common name	Rasalhague	Var name	NSV9189 Oph	Constellation	Ophiuchus	SAO	102932
HIP	86032	Tycho2	1000-02508-1	Gaia DR2	4493746564376278400	HD	159561
HR	6556	GC	23837	GL	Gl 681	BD	BD+12 3252
Bayer	Alpha Ophiuchi	Bayer name	Alp Oph	Flamsteed	55 Ophiuchi	Flamsteed name	55 Oph
FK5	656	Distance	14.9	Distance ly	48.6	Bayer greek	α Oph

ORBITAL ELEMENTS

Period (P)	3139.72d (8.6y)	± 0.28	Periastron (T)	56028.22d (2012.276y)	± 0.029	Semi-major axis (a)	409.8m	± 0.3
Eccentricity (e)	0.93912	± 0.00013	Inclination (i)	130.679°	± 0.067	Longitude of periastron (ω)	170.21°	± 0.23
Node (Ω)	236.86°	± 0.16	Notes	n		Reference	CIA2021e
Equinox	2000		Last observation	2019		Grade	2	(1=Definitive, 9=Indet.)

label	theta	rho
2000-01-01	241.7	0.780
2001-01-01	238.9	0.720
2002-01-01	235.3	0.590
2003-01-01	228.1	0.349
2004-01-01	269.0	0.185
2005-01-01	253.6	0.494
2006-01-01	248.9	0.663
2007-01-01	245.8	0.756
2008-01-01	243.2	0.788
2009-01-01	240.6	0.764
2010-01-01	237.6	0.677
2011-01-01	233.2	0.510
2012-01-01	218.6	0.185
2013-01-01	259.1	0.337
2014-01-01	251.4	0.574
2015-01-01	247.6	0.709
2016-01-01	244.8	0.776
2017-01-01	242.2	0.785
2018-01-01	239.5	0.737
2019-01-01	236.1	0.621
2020-01-01	230.2	0.408
2021-01-01	287.6	0.085
2022-01-01	255.0	0.449
2023-01-01	249.6	0.637
2024-01-01	246.4	0.743
2025-01-01	243.7	0.786
2026-01-01	241.1	0.773
2027-01-01	238.3	0.699
2028-01-01	234.3	0.550
2029-01-01	224.6	0.272
2030-01-01	262.4	0.271

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

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

WDS 17349+1234 MCY 4 (Rasalhague) : NOTES

discov_num	notes	refcode
MCY 4	alp Oph = Rasalhague.
	The companion has been detected by infrared speckle interferometry.	Mcy1983
	Kamper et al. derive a combined astrometric/spectroscopic solution.	Kpr1989
	Gatewood derives a weighted mean parallax of 68.12 +/- 0.75 mas from	Gat2005
	MAP and previous results. Masses resulting from solution are 2.842
	+/- 0.194 and 0.778 +/- 0.058 Msun; spectral types are A2V and K2V.
	This object was incorrectly identified as HD 159571 by Balega et al.	Bag1984b
	1999: Boccaletti et al. (2001) theta was flipped from 116.3 to 63.7,	Boc2001
	as noted by Gatewood (2005).	Gat2005
	Intensity Interferometer Limb-darkened diameter 1.63 +/- 0.13 mas.	HBr1974
	NPOI Limb-darkened diameter 1.855 +/- 0.012 mas, Sp = A4-7III,	NOI2018
	R = 2.97 +/- 0.05 \rsun, Teff = 7627 +/- 98 K, L = 26.9 +/- 1.6 \lsun,
	M = 1.93 +/- 0.03 \msun, Age = 0.91 +/- 0.03 Gyr.
	Orbital elements by Hinkley et al. (2011) gives a mass ratio of	Hnk2011
	2.76 +0.43/-0.27 and individual masses 2.40 +0.23/-0.37 and 0.85
	+0.06/-0.04 Msun, assuming a parallax of 69.1 mas.

REFERENCES

refcode	metd	author	reference
Bag1984b	S j	Balega, Y.Y., Bonneau, D., & Foy, R	1984A&AS...57...31B
Bag1984b		A&AS 57, 31, 1984
Boc2001	As -	Boccaletti, A., Moutou, C., Mouillet, D., Lagrange, A.-M., & Augereau, J.-C.	2001A&A...367..371B
Boc2001	+C	A&A 367, 371, 2001
CIA2021e	Kc j	Richardson, N.D., Lee, L., Schaefer, G., Shenar, T., Sander, A.A.C., Hill, G.M.,	2021ApJL.908.....3R
CIA2021e		Fullard, A.G., Monnier, J.D., Anugu, N., Davies, ClL., Gardner, T.,
CIA2021e		Lanthermann, C., Kraus, S. & Setterholm, B.R.
CIA2021e		ApJL 908, 3, 2021
Gat2005	orb -	Gatewood, G.D.	2005AJ....130..809G
Gat2005		AJ 130, 809, 2005
HBr1974	-	Hanbury Brown, R., Davis, J., & Allen, L.R.	1974MNRAS.167..121H
HBr1974		MNRAS 167, 121, 1974
Hnk2011	orb j	Hinkley, S., Monnier, J.D., Oppenheimer, B.R., Roberts, L.C., Ireland, M.,	2011ApJ...726..104H
Hnk2011	+A	Zimmerman, N., Brenner, D., Parry, I.R., et al.
Hnk2011		ApJ 726:104, 2011
Kpr1989	Si j	Kamper, K.W., Legget, D., & McCarthy, D.W.	1989AJ.....98..686K
Kpr1989	+orb	AJ 98, 686, 1989
Mcy1983	Si -	McCarthy, D.W.	1983nssl.conf..107M
Mcy1983	+C	IAU Colloq 76, 107, 1983
NOI2018	not j	Baines, E.K., Armstrong, J.T., Schmitt, H.R., Zavala, R.T., Benson, J.A., Hutter,	2018AJ....155...30B
NOI2018		D.J., Tycner, C. & van Belle, G.T.
NOI2018		AJ 155, 30, 2018

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
17349+1234	MCY 4		1999	2	64	0.8	2.10	5.00		N D	173456.00+123338.1
17349+1234	MCY 4		2009	10	238	0.7	2.10	5.00		N D	173456.00+123338.1
17349+1234	MCY 4		2010	11	236	0.6	2.10	5.00	A5III	N D	173456.00+123338.1
17349+1234	MCY 4		2014	13	250	0.6	2.10	5.00	A5III	NO	173456.00+123338.1
17349+1234	MCY 4		2015	15	246	0.8	2.10	5.00	A5III	NO	173456.00+123338.1
17349+1234	MCY 4		2016	16	235	0.5	2.10	5.00	A5III	NO	173456.06+123336.1
17349+1234	MCY 4		2018	17	238	0.7	2.10	5.00	A5III	NO	173456.06+123336.1
17349+1234	MCY 4		2021	27	260	0.3	2.10	5.00	A5III	NO	173456.06+123336.1

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WDS 17349+1234 MCY 4 (Rasalhague) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 17349+1234 MCY 4 (Rasalhague) : MEASURES

No records found.

WDS 17349+1234 (Rasalhague) : VIRTUAL EYEPIECE

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WDS 17349+1234 (Rasalhague) : ALADIN DSS IMAGE @ 17^h 34^m 56.06^s +12° 33' 36.1"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 17349+1234 MCY 4 (Rasalhague) : NEIGHBORHOODS

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Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show	Rasalhague	17349+1234	MCY 4		260	0.3
Show		17343+1210	UC 3371		286	45.6	26
Show		17366+1220	UC 3376		36	33.0	28
Show		17347+1304	HEI 549		25	0.7	31
Show		17374+1233	BU 1121		192	0.5	37
Show		17344+1310	STF2184	AB	65	22.8	38
Show		17344+1310	STF2184	AC	293	127.8	38
Show		17326+1204	UC 3365		74	32.7	45
Show		17325+1201	BPM 686		83	107.9	49
Show		17354+1322	A 1879		115	0.6	49
Show		17319+1305	GWP2721		269	62.3	55
Show		17368+1147	BPM 689		25	104.9	55
Show		17322+1156	ISO 4		141	0.2	55
Show		17323+1313	OL 88		285	2.8	56
Show		17386+1153	BRT1287	AB	122	4.1	68
Show		17386+1153	BRT1287	BC	164	3.7	68
Show		17366+1344	UC 3375		24	41.5	75
Show		17400+1253	ROE 96		66	7.2	78
Show		17325+1346	BPM 685		165	76.5	82
Show		17407+1237	BPM 693		106	8.4	85
Show		17317+1111	AG 354		55	2.8	96
Show		17307+1120	GWP2717	AB	150	2.9	97
Show		17307+1120	GWP2717	AC	19	19.8	97
Show		17342+1411	UC 3370		207	51.5	99
Show		17394+1107	TDT 453		205	0.6	109
Show		17286+1333	NSN 60		116	8.2	111
Show		17286+1132	BPM 682		62	21.1	112
Show		17340+1042	LDS4754		310	13.2	113
Show		17308+1052	LDS4747		353	24.7	119
Show		17430+1215	HU 1283		7	0.5	120
Show		17430+1213	BPM 694		190	109.8	120
Show		17278+1137	BRT1285		13	2.8	120
Show		17267+1232	HEI 548		76	2.9	121
Show		17368+1034	STT 333		154	0.2	123
Show		17318+1040	AG 355		333	22.4	124
Show		17339+1031	BRT1286		196	4.3	124
Show		17279+1123	STF2166		282	27.0	126
Show		17436+1257	HU 1284		71	1.0	130
Show		17339+1446	A 1877		62	0.6	134
Show		17269+1340	UC 3342		36	60.8	135
Show		17321+1024	CLL 11		209	56.7	137
Show		17337+1451	WSI 3	AB	33	0.6	139
Show		17337+1451	GII 249	Aa,Ab	151	0.1	139
Show		17263+1137	KPP1265		324	9.7	139
Show		17311+1027	STF2176	AB	17	16.8	139
Show		17311+1027	GUI 19	AC	71	89.8	139
Show		17443+1155	BRT1943		183	2.6	143
Show		17403+1030	BRT1288		155	3.9	147
Show		17294+1032	UC 3352		90	37.4	147
Show		17264+1352	UC 3340		91	6.8	148
Show		17434+1110	BPM 697		102	38.7	151

WDS 17349+1234 : COMPONENTS

	A
B	pa=259.8° sep=0.34"

17349+1234 A

Componente originario normalizzato	AB	Common name	Rasalhague	Coord arcsec 2000	173456.06+123336.1	Mag	2.1
Spectral class	A5III (white)	PmRA	110.00	PmDE	-223.0	SAO	102932
HIP	86032	Tycho2	1000-02508-1	HD	159561	HR	6556
GC	23837	BD	BD+12 3252	Bayer	Alpha Ophiuchi	Bayer name	Alp Oph
Flamsteed	55 Ophiuchi	Flamsteed name	55 Oph	FK5	656

SAO

SAO	102932	DelFlag		RA1950		PmRA1950	0.008
DE1950		PmDE1950	-0.227	Vmag	2.1	SpType	A5
Double code		Source	74	CatNum	656	DM	BD+12 3252
DMcomp		BDsup		HD	159561	M HD	0
GC	23837	RA1950rad	4.59288454	DE1950rad	0.21982384	PmRA2000	0.0082
PmDE2000	-0.226

Hipparcos

Catalog	H	HIP	86032	Proxy		RAhms	17 34 56.00
DEdms	+12 33 38.1	Vmag	2.08	VarFlag		R Vmag	G
RAdeg	263.733	DEdeg	12.5606	AstroRef		Plx	69.84
CCDM	17349+1234	N CCDM	I	Nsys	1	Ncomp	1
MultFlag	G	Source		Qual		M HIP
Theta		Rho		HD	159561	BD	BD+12 3252
CD		CP		Dm number	+12 3252	VIred	0.17
SpType	A5III	R SpType		Coord arcsec 2000	173456.00+123338.1

Hipparcos 2

HIP	86032	Sn	1	So	1	Nc	1
RArad	4.6030153679	DErad	0.2192234059	Plx	67.13	PmRA	108.07
PmDE	-221.57	E RArad	0.87	E DErad	0.71	E Plx	1.06
E pmRA	0.87	E pmDE	0.8	Hpmag	2.1262	E Hpmag	0.0005
SHp	0.003	VA	0	BV	0.155	E BV	0.003
VI	0.17

CCDM

Ccdm	17349+1234	RComp		Comp	A	Note1
Note2	@	Discov num		DRAs	2.08	DDEs	-23.9
R dRAs	5	Year		Theta		Rho
Obs	1	Vmag	2.1	Sp	A5	PmNote
PmRA	120	PmDE	-226	Dm number	+12 3252	Cat1	BD
Name2	102932	Cat2	SAO	HD	159561	M HD
ADS BDS		M ADS BDS		N IDS	*	IDS	17303N1238
HIC	86032

17349+1234 B

Componente originario normalizzato	AB		Coord arcsec 2000	173456.04+123336.0		Mag	5		Calc delta mag	2.9
Calc coord	yes