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. WtE2013H
 
 
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 (Orbital elements from weighted solutions used when available (Table 2),
Izm2019 unweighted elements (Table 1) used for remaining 29 systems.)
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)
 
 
DISCOVERER
 
 
idgroup discov author
1 CHR Center for High Ang. Res. Astronomy (speckle interferometry systems)
3 POP Popovic, G.M.
132 POP Popovic, G.M. (Cvetkovic, Z., Pavlovic, R., Strigachev, A., Novakovic, B., &
132 POP Popovic, G.M.)
133 STF Struve, F.G.W.
166 WTE Wright, E.L., Skrutskie, M.F., Kirkpatrick, J.D., Gelino, C.R., Griffith, R.L.,
166 WTE Marsh, K.A., Jarrett, T., Nelson, M.J., Borish, H.J., Mace, G., Mainzer, A.K.,
166 WTE Eisenhardt, P.R., et al.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
11182+3132 STF1523 AB 2007 1566 231 1.7 4.33 4.80 F9V G9V NOD 111810.92+313145.1
11182+3132 STF1523 AB 2008 1571 225 1.6 4.33 4.80 F9V G9V NOD 111810.92+313145.1
11182+3132 STF1523 AB 2009 1579 215 1.6 4.33 4.80 F9V G9V NOD 111810.92+313145.1
11182+3132 STF1523 AB 2010 1590 211 1.6 4.33 4.80 F9V G9V NOD 111810.92+313145.1
11182+3132 STF1523 AB 2011 1608 198 1.5 4.33 4.80 F9V G9V NOD 111810.92+313145.1
11182+3132 STF1523 AB 2012 1608 190 1.4 4.33 4.80 F9V G9V NOD 111810.92+313145.1
11182+3132 STF1523 AB 2013 1612 188 1.6 4.33 4.80 F9V G9V NOD 111810.90+313144.9
11182+3132 STF1523 AB 2014 1600 180 1.7 4.33 4.80 F9V G9V NOD 111810.90+313144.9
11182+3132 STF1523 AB 2015 1614 175 1.8 4.33 4.80 F9V+G9V NO 111810.90+313145.0
11182+3132 STF1523 AB 2016 1621 170 1.9 4.33 4.80 F9V+G9V NO 111810.90+313145.0
11182+3132 STF1523 AB 2017 1630 164 1.9 4.33 4.80 F9V+G9V NO 111810.90+313145.0
11182+3132 STF1523 AB 2018 1639 161 2.0 4.33 4.80 F9V+G9V NO 111810.90+313145.0
11182+3132 STF1523 AB 2019 1640 155 2.1 4.33 4.80 F9V+G9V NO 111810.90+313145.0
11182+3132 STF1523 AB 2020 1658 152 2.3 4.33 4.80 F9V+G9V NO 111810.90+313145.0

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