WDS 20452-3120 LDS 720 BC : NOTES
 
 
discov_num notes refcode
LDS 720 AB: Distance 4600". A is the BY Dra-type variable AU Mic, also nearby
star Gliese 803. High common proper motion pair.
AB: SHY 99. Bayesian analysis by Shaya & Olling (2011) indicates very Shy2011
high (near 100%) probability pair is physical.
BC: Due to its large distance from A, the WDS designation for BC was
originally 20419-3226. Also known as BRT1812 or HDS2953 and as nearby
star Gliese 799 AB. Discovered by Barton in 1913 but later incorrectly Brt1936a
called Luyten by Voute, the BC pair became known as LDS 720 despite Vou1947a
having never been observed by Luyten. See also the following note for
20452-3122WOR 40.
GJ 799. Member of the bet Pic moving group. Zuc2001b
BC: Premature orbits have been computed. A flare star, AT Mic, sharing
common proper motion with -32@16135 at 34@, 77.5'.
Measure of 1927.70 made by triangulation of multiple measures.
Measure of 1928.57 made by triangulation of multiple measures.
Star A (mag 8.6, M0Ve) 1.3 deg distant; position 204509.5-312027
(2000) shares the large proper motion. Star C is the flare star
AT Mic.
See Baize & Petit (1989) catalog of doubles with variable component. Baz1989d
 
 
REFERENCES
 
 
refcode metd author reference
Baz1989d - Baize, P. & Petit, M. 1989A&AS...77..497B
Baz1989d A&AS 77, 497, 1989
Brt1936a Ma - Barton, S.G. 1936AJ.....45...33B
Brt1936a +Pa AJ 45, 33, 1936
Hrt2014b orb - Hartkopf, W.I. & Mason, B.D. 2014IAUDS.184....1H
Hrt2014b Inf. Circ. 184, 1, 2014
Shy2011 - Shaya, E.J. & Olling, R. 2011ApJS..192....2S
Shy2011 ApJS 192, 2, 2011
Shy2011 (Statistical analysis of probability that wide Hipparcos pairs are physical. Pairs
Shy2011 added to WDS only if probability 90% or greater.)
Vou1947a Ma j Voute, J.G., Terkule, Strand, K., van den Bos, W., Wallenquist, A., van Dissel, 1947AnBos...6....3V
Vou1947a +Po Janssen, & Witlox
Vou1947a Ann. Bosscha Obs. Lembang 6, Pt.3, C1, 1947
Zuc2001b - Zuckerman, B., Song, I., Bessell, M.S., & Webb, R.A. 2001ApJ...562L..87Z
Zuc2001b ApJ 562, L87, 2001
 
 
DISCOVERER
 
 
idgroup discov author
1 LDS Luyten p.m. catalog (from additional DD list)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20452-3120 LDS 720 BC 1991 16 186 3.2 11.36 11.49 Mpe NO 204151.16-322606.7
20452-3120 LDS 720 BC 2010 18 338 2.4 11.36 11.49 Mpe NO 204151.16-322606.7
20452-3120 LDS 720 BC 2012 20 153 2.3 11.36 11.49 Mpe NO 204151.16-322606.7
20452-3120 LDS 720 BC 2014 24 148 2.2 11.36 11.49 M4Ve NO 204151.16-322606.7
20452-3120 LDS 720 BC 2015 26 146 2.1 11.36 11.49 M4Ve NO 204151.16-322606.7
20452-3120 LDS 720 BC 2020 27 128 1.8 11.36 11.49 M4Ve NO 204151.16-322606.7

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