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

11182+3132 STF 1523 AB (Alula Australis)

11^h 18^m 10.90^s +31° 31' 45.0" P.A. 137.00 sep 3.3 mag 4.33,4.80 Sp F9V+G9V dist. 10.42 pc (33.99 l.y.)

Coord 2000	11182+3132	Discov num	STF1523	Comp	AB	Coord arcsec 2000	11 18 10.90 +31 31 45.0
Date first	1819	Date last	2024	Obs	1670
Pa first	285	Pa last	137.2	P.A. Now (θ)	136.2°
Sep first	2.6	Sep last	3.26	Sep. Now (ρ)	2.591"
Mag pri	4.33	Mag sec	4.80	delta mag (ΔM)	0.47	Spectral class	F9V+G9V (yellow-white/yellow)
Pri motion ra	-454	Sec motion ra	-454
Pri motion dec	-591	Sec motion dec	-591
Notes	N O (See Notes, Orbital solution)

This double is physical.

11182+3132 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Alula Australis	62484	11 18 11 +31 31 45	STF 1523 AB	2024	1670	137	3.3	4.33	4.80	0.47	Y	<===
Show		62484	11 18 11 +31 31 45	POP 1219 AC	2015	5	331	59.7	4.33	15.00	10.67
Show		62484	11 18 11 +31 31 45	WTE 1 AD	2012	15	136	511.4	2.14	18.75	16.61
Show			11 18 11 +31 31 46	CHR 178 Ba,Bb	1994	2	75	0.0	4.40

Quintuple system
4 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Common name	Alula Australis	Var name	NSV5165 UMa	Constellation	Ursa Major	SAO	62484
HIP	55203	Tycho2	2520-02634-1	HD	98231	HR	4375
GC	15537	ADS	8119	BD	BD+32 2132	Bayer	Xi Ursae Majoris
Bayer name	Xi UMa	Flamsteed	53 Ursae Majoris	Flamsteed name	53 UMa	Distance	10.42
Distance ly	33.99	Bayer greek	ξ UMa

Meaning

first (leap gazelle), South

ORBITAL ELEMENTS

Period (P)	59.8903y	± 0.0419	Periastron (T)	1935.17y	± 0.0473	Semi-major axis (a)	2.50442a	± 0.00535
Eccentricity (e)	0.40432	± 0.00204	Inclination (i)	122.187°	± 0.192	Longitude of periastron (ω)	126.964°	± 0.343
Node (Ω)	100.939°	± 0.202	Notes	n		Reference	Izm2019
Equinox			Last observation	2015		Grade	1	(1=Definitive, 9=Indet.)

label	theta	rho
2000	273.5	1.770
2001	267.8	1.803
2002	262.1	1.809
2003	256.5	1.795
2004	250.7	1.767
2005	244.7	1.732
2006	238.4	1.694
2007	231.9	1.658
2008	225.1	1.629
2009	218.1	1.608
2010	210.9	1.599
2011	203.8	1.604
2012	196.7	1.622
2013	189.8	1.655
2014	183.3	1.701
2015	177.1	1.758
2016	171.4	1.825
2017	166.1	1.901
2018	161.2	1.982
2019	156.8	2.068
2020	152.6	2.156
2021	148.8	2.246
2022	145.3	2.335
2023	142.1	2.423
2024	139.1	2.509
2025	136.2	2.591
2026	133.6	2.668
2027	131.1	2.741
2028	128.7	2.807
2029	126.4	2.867
2030	124.2	2.919
2031	122.1	2.963
2032	120.0	2.998
2033	118.0	3.023
2034	116.0	3.038
2035	114.0	3.042
2036	112.0	3.034
2037	110.0	3.014
2038	108.0	2.979
2039	105.9	2.930
2040	103.7	2.866
2041	101.4	2.785
2042	98.9	2.687
2043	96.3	2.570
2044	93.3	2.433
2045	90.0	2.277
2046	86.2	2.100
2047	81.6	1.903
2048	75.9	1.687
2049	68.4	1.460
2050	58.2	1.230

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

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

WDS 11182+3132 STF 1523 AB (Alula Australis) : NOTES

discov_num	notes	refcode
STF1523	xi UMa = 53 UMa = Alula Australis. A is known to have an unseen
	companion, P = 1.83y. B is a spectroscopic binary. The first binary
	star orbit was computed by Savary, a "librarian-observer" at Paris	Sav1830
	Observatory giving courses in "social arithmetic," i.e., statistics.
	Spectral types and masses of components assigned by ten Brummelaar et
	al., based on adaptive optics observations.	TtB2000
	Preliminary Keplerian AB 2-orbit model by Soderhjelm (1999) gives	Sod1999
	good solution (failure in HIP).
	Many-body perturbations observable but not yet studied. Cf. Aa,Bb
	analysis in Mason et al. (1995)	Msn1995
	Both orbits are visual and spectroscopic. The orbit of the visible
	AB pair includes the secular perturbations in inclination, node,
	longitude of periastron, and K. Star B is also SB1, P = 3.98 d.
	The short-period pair has been resolved by infrared speckle
	interferometry	Mcy1983
	See Baize & Petit (1989) catalog of doubles with variable component.	Baz1989d
	HR 4375 (A component of STF1523) was misidentified as HR 4374 (B
	component) in McAlister (1978).	McA1978c
	An orbital analysis of xi UMa, including the AB pair, the astrometric
	companion, and the newly-discovered Bc companion, has been published
	by Mason et al. (1995).	Msn1995
	AB: H 1 2.	MEv2010
CHR 178	Bb. Abt & Biggs (1972) note variable RV.	AbH1972
	Given the typical lack of accuracy associated with astrometric orbits	Tok2010b
	it is possible that in the doubling of peaks CHR 178 is actually the
	known Aa,Ab observing when the faint Ab was flaring. In this
	interpretation, the second elongated observation of CHR 178 is assumed
	to be false.
WTE 1	AD: Faint T8.5 brown dwarf companion at separation ~4000au exhibits
	common proper motion. IR luminosity and color suggest that mass of
	companion 14 and 38 Mjup for system ages 2 and 8 Gyr, respectively.	WtE2013

REFERENCES

refcode	metd	author	reference
AbH1972	-	Abt. H.A. & Biggs, E.S.	1972bsrv.book.....A
AbH1972		Bibliography of Stellar Radial Velocities
Baz1989d	-	Baize, P. & Petit, M.	1989A&AS...77..497B
Baz1989d		A&AS 77, 497, 1989
Izm2019	orb u	Izmailov, I.S.	2019AstL...45...30I
Izm2019		Ast. Lett. 45, 30, 2019
Izm2019
Izm2019
McA1978c	Sc j	McAlister, H.A.	1978PASP...90..288M
McA1978c		PASP 90, 288, 1978
Mcy1983	Si -	McCarthy, D.W.	1983nssl.conf..107M
Mcy1983	+C	IAU Colloq 76, 107, 1983
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Msn1995	Sc j	Mason, B.D., McAlister, H.A., Hartkopf, W.I., & Shara, M.M.	1995AJ....109..332M
Msn1995	+orb	AJ 109, 332, 1995
Sav1830	orb -	Savary	.
Sav1830		Conn. des Temps, 1830
Sod1999	orb -	Soderhjelm, S.	1999A&A...341..121S
Sod1999		A&A 341, 121, 1999
Tok2010b	S -	Tokovinin, A.	...................
Tok2010b		private communication
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)
WtE2013	Hw -	Wright, E.L., Skrutskie, M.F., Kirkpatrick, J.D., Gelino, C.R., Griffith, R.L.,	2013AJ....145...84W
WtE2013	+Hi	Marsh, K.A., Jarrett, T., Nelson, M.J., Borish, H.J., Mace, G., Mainzer, A.K.,
WtE2013	+Ci	Eisenhardt, P.R., et al.
WtE2013		AJ 145, 84, 2013
WtE2013		(Note: Paper gives only coordinates of companion. Rho and theta derived based on
WtE2013		SIMBAD coordinates for xi UMa A = 111810.902+313144.98 (J2000). WISE and 2MASS
WtE2013		magnitudes for primary added by cataloguer.)

DISCOVERER

discov	author
ABH	Abt, H.A.
IZM	Izmailov, I.S., Khovricheva, M.L., Khovrichev, M. Yu., Kiyaeva, O.V., Khrutskaya,
IZM	E.V., Romanenko, L.G., Grosheva, E.A., Maslennikov, K.L. & Kalinichenko, O.A.
MCY	McCarthy, D.W., Jr., Hancock, T., Freeman, J., McLeod, B., Lloyd-Hart, M.,
MCY	Colucci, D., Wizinowich, P., Clampin, M., et al.
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.
TTB	ten Brummelaar, T.A., Mason, B.D., Bagnuolo, W.G., Jr., Hartkopf, W.,
TTB	McAlister, H.A., & Turner, N.H.
TTB	ten Brummelaar, T.A., Mason, B.D., McAlister, H.A., Roberts, L.C., Jr.,
TTB	Turner, N.H., Hartkopf, W.I., & Bagnuolo, W.G., Jr.
WTE	Wright, E.L., Skrutskie, M.F., Kirkpatrick, J.D., Gelino, C.R., Griffith, R.L.,
WTE	Marsh, K.A., Jarrett, T., Nelson, M.J., Borish, H.J., Mace, G., Mainzer, A.K.,
WTE	Eisenhardt, P.R., et al.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	dm_number	notes	coord_arcsec_2000
11182+3132	STF1523	AB	2007	1566	231	1.7	4.33	4.80	F9V G9V	+32 2132	NOD	111810.92+313145.1
11182+3132	STF1523	AB	2008	1571	225	1.6	4.33	4.80	F9V G9V	+32 2132	NOD	111810.92+313145.1
11182+3132	STF1523	AB	2009	1579	215	1.6	4.33	4.80	F9V G9V	+32 2132	NOD	111810.92+313145.1
11182+3132	STF1523	AB	2010	1590	211	1.6	4.33	4.80	F9V G9V	+32 2132	NOD	111810.92+313145.1
11182+3132	STF1523	AB	2011	1608	198	1.5	4.33	4.80	F9V G9V	+32 2132	NOD	111810.92+313145.1
11182+3132	STF1523	AB	2012	1608	190	1.4	4.33	4.80	F9V G9V	+32 2132	NOD	111810.92+313145.1
11182+3132	STF1523	AB	2013	1612	188	1.6	4.33	4.80	F9V G9V	+32 2132	NOD	111810.90+313144.9
11182+3132	STF1523	AB	2014	1600	180	1.7	4.33	4.80	F9V G9V	+32 2132	NOD	111810.90+313144.9
11182+3132	STF1523	AB	2015	1614	175	1.8	4.33	4.80	F9V+G9V	+32 2132	NO	111810.90+313145.0
11182+3132	STF1523	AB	2016	1621	170	1.9	4.33	4.80	F9V+G9V	+32 2132	NO	111810.90+313145.0
11182+3132	STF1523	AB	2017	1630	164	1.9	4.33	4.80	F9V+G9V	+32 2132	NO	111810.90+313145.0
11182+3132	STF1523	AB	2018	1639	161	2.0	4.33	4.80	F9V+G9V	+32 2132	NO	111810.90+313145.0
11182+3132	STF1523	AB	2019	1640	155	2.1	4.33	4.80	F9V+G9V	+32 2132	NO	111810.90+313145.0
11182+3132	STF1523	AB	2020	1658	152	2.3	4.33	4.80	F9V+G9V	+32 2132	NO	111810.90+313145.0
11182+3132	STF1523	AB	2022	1667	144	2.4	4.33	4.80	F9V+G9V	+32 2132	NO	111810.90+313145.0

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

WDS 11182+3132 STF 1523 AB (Alula Australis) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 11182+3132 STF 1523 AB (Alula Australis) : MEASURES

No records found.

WDS 11182+3132 (Alula Australis) : 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 11182+3132 (Alula Australis) : ALADIN DSS IMAGE @ 11^h 18^m 10.90^s +31° 31' 45.0"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 11182+3132 STF 1523 AB (Alula Australis) : 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	Alula Australis	11182+3132	STF1523	AB	137	3.3	0
Show	Alula Australis	11182+3132	POP1219	AC	331	59.7	0
Show	Alula Australis	11182+3132	WTE 1	AD	136	511.4	0
Show		11182+3132	CHR 178	Ba,Bb	75	0.0	1
Show		11162+3136	A 2157		3	1.4	26
Show		11211+3134	MLB 849		174	5.1	38
Show		11158+3202	CBL 334		157	38.8	43
Show		11129+3130	HEI 12		120	2.4	68
Show		11125+3205	COU 963		187	1.1	80
Show		11169+3251	RAO 654		270	0.8	81
Show		11240+3052	UC 2129		81	22.9	85
Show		11218+3018	KPP3843		292	5.2	88
Show		11230+3027	GRV 834		121	82.8	90
Show		11133+3238	SLN 67		44	56.7	91
Show		11118+3218	CVR 115		139	93.9	94
Show	Alula Borealis	11185+3306	STF1524	AB	149	7.4	94
Show	Alula Borealis	11185+3306	BUP9001	AC	147	156.8	94
Show	Alula Borealis	11185+3306	DAM 652	AD	269	281.1	94
Show		11227+3018	NI 25		86	4.5	95
Show		11107+3110	HJ 2562		221	1.0	99
Show		11225+3256	CVR 608		305	8.0	101
Show		11257+3056	UC 2136		71	73.8	104
Show		11100+3114	RAO 652		229	0.9	104
Show		11108+3215	FAR 61		298	0.2	104
Show		11227+3305	CVR1363		73	3.1	110
Show		11111+3027	STT 231	AB	262	33.9	113
Show		11111+3027	STT 231	AD	30	233.9	113
Show		11111+3027	STT 231	AC	321	216.2	113
Show		11111+3027	STT 231	CE	36	139.4	113
Show		11111+3027	STT 231	BC	330	200.9	113
Show		11227+3313	CVR1364		180	3.8	117
Show		11161+3329	GMZ 187		116	4.4	120
Show		11087+3124	FAR 60		105	0.5	122
Show		11243+3306	HDS1621		81	0.2	123
Show		11185+3335	CVR1358		337	3.5	124
Show		11283+3136	JNN 76		146	1.1	130
Show		11283+3144	CRB 89		12	25.3	130
Show		11171+3340	GMZ 188		75	9.0	130
Show		11133+3327	HO 254		163	2.7	131
Show		11139+3331	GMZ 186		195	14.6	132
Show		11280+3216	SLW 602		314	19.7	133
Show		11171+2919	HDS1608		324	3.3	134
Show		11285+3113	SEI 525		145	15.0	134
Show		11184+2913	CBL 336		238	16.5	139
Show		11195+3350	GMZ 192		190	12.2	139
Show		11177+3351	GMZ 189	AB	102	7.3	140
Show		11073+3146	CVR 113		161	15.0	141
Show		11099+3001	CVR1346		229	3.1	141
Show		11289+3206	CVR 614		131	28.1	141
Show		11182+3354	GMZ 191		194	8.8	143
Show		11214+3348	GMZ 193	BC	352	3.7	143

WDS 11182+3132 : COMPONENTS

	A	B	Bb	C
B	pa=42.4° sep=0.95"
Bb	pa=43.2° sep=0.97"	pa=74.8° sep=0.03"
C	pa=330.7° sep=59.69"	pa=329.8° sep=59.40"	pa=329.8° sep=59.40"
D	pa=136.1° sep=511.55"	pa=136.2° sep=511.61"	pa=136.2° sep=511.60"	pa=137.6° sep=569.49"

11182+3132 A

Common name	Alula Australis	Meaning	first (leap gazelle), South	Coord arcsec 2000	111810.90+313145.0	Mag	4.33
Spectral class	F9V (yellow-white)	PmRA	-454.00	PmDE	-591.0	SAO	62484
HIP	55203	Tycho2	2520-02634-1	HD	98231	HR	4375
GC	15537	BD	BD+32 2132	Bayer	Xi Ursae Majoris	Bayer name	xi UMa
Flamsteed	53 Ursae Majoris	Flamsteed name	53 UMa

Tycho2

Tycho2	2520-02634-1	Pflag	P	RAmdeg	169.54548201	DEmdeg	31.52919433
PmRA	-453.7	PmDE	-591.4	E RAmdeg	3	E DEmdeg	4
E pmRA	4.4	E pmDE	4.1	EpRAm	1991.75	EpDEm	1991.57
Num	3	Q RAmdeg	0.0	Q DEmdeg	2.0	Q pmRA	0.2
Q pmDE	2.0	BTmag	4.920	E BTmag	0.014	VTmag	4.327
E VTmag	0.009	Prox	10	TYC		HIP
CCDM		RAdeg	169.54664306	DEdeg	31.53051583	EpRA 1990	1.75
EpDE 1990	1.60	E RAdeg	3.3	E DEdeg	3.5	Posflg	D
Corr	0.1

SAO

SAO	62484	DelFlag		RA1950		PmRA1950	-0.0339
DE1950		PmDE1950	-0.591	Vmag	3.9	SpType	G0
Double code		Source	70	CatNum	15537	DM	BD+32 2132
DMcomp		BDsup		HD	98230	M HD	9
GC	15537	RA1950rad	2.9475093	DE1950rad	0.5552032	PmRA2000	-0.0338
PmDE2000	-0.586

Hipparcos

Catalog	H	HIP	55203	Proxy		RAhms	11 18 11.24
DEdms	+31 31 50.8	Vmag	3.79	VarFlag		R Vmag	G
RAdeg		DEdeg		AstroRef		Plx
CCDM		N CCDM	I	Nsys	1	Ncomp
MultFlag		Source		Qual	S	M HIP
Theta		Rho		HD		BD	BD+32 2132
CD		CP		Dm number	+32 2132	VIred	0.68
SpType	G0V	R SpType		Coord arcsec 2000	111811.24+313150.8

CCDM

Ccdm	11182+3132	RComp		Comp	A	Note1
Note2	@	Discov num		DRAs	-1.05	DDEs	-14.4
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	4.4	Sp	G0	PmNote	*
PmRA	-429	PmDE	-586	Dm number	+32 2132	Cat1	BD
Name2	62484	Cat2	SAO	HD	98231	M HD
ADS BDS	A 8119	M ADS BDS		N IDS		IDS	11128N3206A
HIC	55203

11182+3132 B

Coord arcsec 2000	111810.95+313145.7		Coord calc	111811.07+313142.6		Mag	4.4		Composed magnitude	4.8
Spectral class	G0V (yellow)		PmRA	-454.00		PmDE	-591.0		Delta magnitude	0.07

11182+3132 Bb

Coord arcsec 2000

111810.95+313145.7

Delta magnitude

4.33

Coordinate calculated

yes

11182+3132 C

Coord arcsec 2000

111808.62+313237.1

Mag

Delta magnitude

10.67

Coordinate calculated

yes

11182+3132 D

Coord arcsec 2000	111838.64+312536.5		Mag	18.75		Spectral class	T8.5 (brown dwarf)		Delta magnitude	14.42
Coordinate calculated	yes