16044-1122 STF 1998 AB (Xi Sco)

16^h 04^m 22.13^s -11° 22' 23.2" P.A. 17.00 sep 1.1 mag 4.84,4.86 Sp F5IV+F5IV

Coord 2000	16044-1122	Discov num	STF1998	Comp	AB	Coord arcsec 2000	16 04 22.13 -11 22 23.2
Date first	1825	Date last	2023	Obs	644
Pa first	356	Pa last	17.1	P.A. Now (θ)	20.5° (calc)
Sep first	1.2	Sep last	1.133	Sep. Now (ρ)	1.087" (calc)
Mag pri	4.84	Mag sec	4.86	delta mag (ΔM)	0.02	Spectral class	F5IV+F5IV (yellow-white/yellow-white)
Pri motion ra	-074	Sec motion ra	-042
Pri motion dec	-033	Sec motion dec	-019
Notes	N O (See Notes, Orbital solution)

rPM=0.431

This double is physical.

16044-1122 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Xi Sco	159665	16 04 22 -11 22 23	STF 1998 AB	2023	644	17	1.1	4.84	4.86	0.02	Y	<===
Show		159665	16 04 22 -11 22 23	STF 1998 AC	2023	394	42	8.0	4.84	7.30	2.46	Y
Show		159665	16 04 22 -11 22 20	STF 1998 BC	2023	80	45	7.1	4.86	7.30	2.44

Triple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	Xi Sco	Constellation	Scorpius	SAO	159665	HIP	78727
Tycho2	5619-01257-1	Gaia DR2	4343066192367555200	HD	144069	HR	5977
GC	21593	ADS	9909	BD	BD-10 4237	Bayer	Xi Librae
Bayer name	Xi Lib	Flamsteed	51 Librae	Flamsteed name	51 Lib	Bayer greek	ξ Lib

Bayer or Flamsteed indentifiers not always match the correct constellation because of procession and proper motion of the star. (Lib vs Sco)

ORBITAL ELEMENTS

Period (P)	45.9y	± 0.6	Periastron (T)	1997.22y	± 0.02	Semi-major axis (a)	0.654a	± 0.006
Eccentricity (e)	0.744	± 0.001	Inclination (i)	34.5°	± 1	Longitude of periastron (ω)	163.8°	± 5
Node (Ω)	25.3°	± 4	Notes	n		Reference	Doc2009g
Equinox	2000		Last observation	2006		Grade	1	(1=Definitive, 9=Indet.)

label	theta	rho
2000	300.7	0.326
2001	314.6	0.406
2002	324.0	0.483
2003	330.8	0.555
2004	336.2	0.622
2005	340.5	0.684
2006	344.1	0.741
2007	347.3	0.793
2008	350.0	0.841
2009	352.5	0.885
2010	354.8	0.924
2011	356.9	0.960
2012	358.8	0.992
2013	0.6	1.021
2014	2.3	1.046
2015	4.0	1.067
2016	5.6	1.086
2017	7.1	1.100
2018	8.6	1.112
2019	10.1	1.121
2020	11.6	1.126
2021	13.0	1.128
2022	14.5	1.126
2023	16.0	1.122
2024	17.4	1.114
2025	18.9	1.102
2026	20.5	1.087
2027	22.1	1.069
2028	23.7	1.046
2029	25.5	1.020
2030	27.3	0.990
2031	29.2	0.955
2032	31.3	0.916
2033	33.6	0.873
2034	36.2	0.823
2035	39.1	0.769
2036	42.5	0.708
2037	46.6	0.640
2038	51.7	0.564
2039	58.5	0.480
2040	68.4	0.386
2041	85.2	0.286
2042	119.4	0.193
2043	183.6	0.163
2044	243.2	0.195
2045	280.8	0.257
2046	302.3	0.334
2047	315.7	0.414
2048	324.7	0.491
2049	331.4	0.562
2050	336.6	0.629

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

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

WDS 16044-1122 STF 1998 AB (Xi Sco) : NOTES

discov_num	notes	refcode
STF1998	51 Lib = xi Sco. Quintuple.
	AB: Mt. Wilson spectral type F3s.
	Masses and bolometric magnitudes are derived for the two components
	of this system by Mason et al. (1999), based on assumed spectral types	Msn1999a
	and available parallaxes.
	AB: H 1 33. AC: H 2 20.	MEv2010
	AB,C triple solution by Soderhjelm (1999). (Failed HIP solution due to	Sod1999
	bad pointing with C comp at IFOV edge).
	Star C (mag. 7.30, 7", G1V) is in retrograde motion, and ADS 9910
	(mags. 7.4-8.0, 11", dG6) is 281" distant and shares proper motion.
	Appears to be a common proper motion pair associated with RST3949	Tok2010b
	(16278-0822).
	AC: Additional notes may be found in Fatou (1941).	Fat1941
	Mass = 1.53, 1.53, 1.00 \msun for A, B, C, respectively.	Tok2020d
	Teff = 6532, 6532, 5705 K for A, B, C, respectively.
	Physical quintuple with 16044-1127STF1999AB with P ~ 300 kyr.

REFERENCES

refcode	metd	author	reference
Doc2009g	orb -	Docobo, J.A. & Ling, J.F.	2009AJ....138.1159D
Doc2009g		AJ 138, 1159, 2009
Fat1941	Ma -	Fatou, P.	1941JO.....24...29F
Fat1941		J. Obs. 24, 29, 1941
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Msn1999a	Su j	Mason, B.D., Douglass, G.G., & Hartkopf, W.I.	1999AJ....117.1023M
Msn1999a	+orb	AJ 117, 1023, 1999
Sod1999	orb -	Soderhjelm, S.	1999A&A...341..121S
Sod1999		A&A 341, 121, 1999
Tok2010b	S -	Tokovinin, A.	...................
Tok2010b		private communication
Tok2020d	orb j	Tokovinin, A.	2020AJ....159..265T
Tok2020d

DISCOVERER

discov	author
DOC	Docobo, J. (Docobo et al.)
DOC	Docobo, J.A., Andrade, M., Ling, J.F., Prieto, C., Tamazian, V.S., Balega, Yu.Yu.,
DOC	Blanco, J., Maximov, A.F., et al.
DOC	Docobo, J.A., Tamazian, V.S., Andrade, M., Ling, J.F., Balega, Y.Y.,
DOC	Lahulla, J.F., & Maximov, A.
DOC	Docobo, J.A., Tamazian, V.S., Balega, Y.Y., Andrade, M., Schertl, D., Weigelt, G.,
DOC	Campo, P., & Palacios, M.
DOC	Docobo, J.A., Tamazian, V.S., Andrade, M., Ling, J.F., Balega, Y.Y.,
DOC	Lahulla, J.F., & Maximov, A.
DOC	Highlights of Spanish Astrophysics V, Ap&SS Proc. (Springer-Verlag, Berlin),
DOC	p 491, 2010 (no data)
MSN	Mason, B.D., Gies, D.R., Hartkopf, W.I., Bagnuolo, Jr., W.G.,
MSN	ten Brummelaar, T.A., & McAlister, H.A.
MSN	Mason, B.D., Martin, C., Hartkopf, W.I., Barry, D.J., Germain, M.E.,
MSN	Douglass, G.G., Worley, C.E., ten Brummelaar, T.A., et al.
MSN	Mason, B.D., Hartkopf, W.I., Raghavan, D., Subasavage, J.P., Roberts, L.C., Jr.,
MSN	Turner, N.H., & ten Brummelaar, T.A.
TOK	Tokovinin, A., Cantarutti, R., Tighe, R., Schurter, P., van der Bliek, N.,
TOK	Martinez, M., & Mondaca, E.
TOK	Tokovinin, A., Corbett, H., Fors, O., Howard, W., Law, N.M., Moe, M.,
TOK	Tokovinin, A. & Briceno, C.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	dm_number	notes	coord_arcsec_2000
16044-1122	STF1998	AB	2008	605	351	0.9	5.16	4.87	F7V	-10 4237	NOD	160421.63-112224.8
16044-1122	STF1998	AB	2009	616	353	0.9	5.16	4.87	F7V	-10 4237	NOD	160421.63-112224.8
16044-1122	STF1998	AB	2010	626	356	0.9	5.16	4.87	F7V	-10 4237	NOD	160421.63-112224.8
16044-1122	STF1998	AB	2012	629	360	0.9	5.16	4.87	F7V	-10 4237	NOD	160421.63-112224.8
16044-1122	STF1998	AB	2014	606	3	1.1	5.16	4.87	F7V	-10 4237	NOD	160421.63-112224.8
16044-1122	STF1998	AB	2016	611	10	1.1	5.16	4.87	F7V	-10 4237	NO	160422.13-112223.2
16044-1122	STF1998	AB	2017	612	8	1.1	5.16	4.87	F7V	-10 4237	NO	160422.13-112223.2
16044-1122	STF1998	AB	2018	619	9	1.1	5.16	4.87	F7V	-10 4237	NO	160422.13-112223.2
16044-1122	STF1998	AB	2019	626	11	1.1	4.84	4.86	F5IV+F5IV	-10 4237	NO	160422.13-112223.2
16044-1122	STF1998	AB	2020	630	12	1.2	4.84	4.86	F5IV+F5IV	-10 4237	NO	160422.13-112223.2
16044-1122	STF1998	AB	2023	636	17	1.0	4.84	4.86	F5IV+F5IV	-10 4237	NO	160422.13-112223.2

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

WDS 16044-1122 STF 1998 AB (Xi Sco) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 16044-1122 STF 1998 AB (Xi Sco) : MEASURES

No records found.

WDS 16044-1122 (Xi Sco) : VIRTUAL EYEPIECE

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

WDS 16044-1122 (Xi Sco) : ALADIN DSS IMAGE @ 16^h 04^m 22.13^s -11° 22' 23.2"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 16044-1122 STF 1998 AB (Xi Sco) : 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		16044-1122	STF1998	AB	17	1.1	0
Show		16044-1122	STF1998	AC	42	8.0	0
Show		16044-1122	STF1998	BC	45	7.1	1
Show		16044-1127	STF1999	AB	98	11.9	5
Show		16044-1127	STF1999	AD	349	279.7	5
Show		16044-1127	STF1999	AC	85	84.5	5
Show		16044-1127	STF1999	BC	82	73.0	5
Show		16030-1125	KPP1937		48	15.3	21
Show		16020-1118	HDS2261		31	0.1	36
Show		16071-1110	KPP1054		40	8.4	42
Show		16077-1103	BWL 42		149	0.7	53
Show		16077-1155	LSC 62		264	0.1	60
Show		16006-1059	GWP2574		92	73.5	61
Show		16047-1014	LDS4628		343	50.2	68
Show		16026-1230	HDS2263		46	0.2	73
Show		16092-1057	HDS2279		320	0.3	76
Show		15597-1048	FAL 51		257	15.5	78
Show		16035-1242	DAM2514		134	1.4	81
Show		16035-1247	UC 3109		66	50.1	86
Show		16076-1245	BU 39	AB	259	3.3	96
Show		16076-1245	BU 39	AC	322	29.7	96
Show		16085-1006	BU 949		162	0.1	98
Show		16090-1239	UC 3124		241	62.4	103
Show		16086-1245	HU 155		255	0.8	104
Show		16109-1204	HU 156		84	2.9	105
Show		16073-1309	KPP2778		1	4.2	116
Show		16031-1321	GWP2581		19	14.0	120
Show		16084-1308	GIC 139	AB	0	15.1	122
Show		16109-1006	WRH 24		87	0.2	124
Show		16090-0939	WSI 85		314	0.1	125
Show		16129-1052	KPP2445		165	21.5	129
Show		16038-1345	UC 3113		0	42.0	144
Show		16140-1152	RST3935		137	1.8	146
Show		16138-1034	CLL 10		181	57.7	147
Show		15542-1134	KPP1299		5	9.9	150
Show		16045-0851	A 2591		5	2.9	151
Show		15542-1152	UC 3085		141	28.8	153
Show		15585-0913	DAM2504		326	1.1	156
Show		15583-0913	TSN 93		168	134.4	157
Show		16143-1025	RST3936	AB	267	0.3	157
Show		16143-1025	STF2019	AB,C	153	22.3	157
Show		15539-1039	GWP2560		40	119.5	161
Show		15581-0908	GIC 137		114	10.9	164
Show		16071-1404	NSN 153		259	36.9	167
Show		16127-1319	SKF 440	AB	130	8.6	169
Show		15549-0945	KPP 659		319	5.9	171
Show		16105-0857	GWP2605		333	14.8	172
Show		16036-1417	TVB 283		142	21.8	175
Show		15542-0945	OCC9008		-1	7.0	180
Show		16072-1418	UC 3120		131	46.1	180
Show		15545-1311	LDS4599		69	158.3	181

WDS 16044-1122 : COMPONENTS

	A	B
B	pa=8.4° sep=3.03"
C	pa=41.5° sep=8.02"	pa=58.3° sep=5.73"

16044-1122 A

Name	Xi Sco		Coord arcsec 2000	160422.13-112223.2		Mag	4.84		Spectral class	F5IV (yellow-white)
PmRA	-74.00		PmDE	-33.0

16044-1122 B

Coord arcsec 2000	160422.16-112220.2		Coord calc	160422.16-112220.2		Mag	4.86		Spectral class	F5IV (yellow-white)
PmRA	-42.00		PmDE	-19.0		Delta magnitude	0.02

16044-1122 C

Coord arcsec 2000	160422.49-112217.2	Mag	7.3	Spectral class	G1V (yellow)	PmRA	-75.00
PmDE	-12.0	SAO	140930	HD	143928	HR	5975
DM	BD-08 4144	Delta magnitude	2.46	Coordinate calculated	yes

SAO

SAO	140930	DelFlag		RA1950		PmRA1950	-0.0009
DE1950		PmDE1950	0.002	Vmag	8.7	SpType	K2
Double code		Source	26	CatNum	5585	DM	BD-08 4144
DMcomp		BDsup		HD	144086	M HD	0
GC		RA1950rad	4.19652846	DE1950rad	-0.15221369	PmRA2000	-0.0007
PmDE2000	0.006