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Name
  lam Mus  
AAVSO UID
000-BBS-390 (No observations)  
Constellation
Musca Sequence
J2000.0
11 45 36.41 -66 43 43.5  (176.40171 -66.72875) Search nearby
B1950.0 11 43 13.17 -66 27 03.6
Galactic coord. 296.484 -4.685
Other names

(Internal only)
2MASS J11453643-6643433 CPD-66 1640 GSC 08985-03045
Gaia DR3 5236306071562633344 HD 102249 HIP 57363
HR 4520 PPM 358955 SAO 251575
TIC 296688052 TYC 8985-3045-1  
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Variability type
DSCT
Spectral type A7V+MV+MV
Mag. range
3.63 - 3.64 V
Discoverer Tara Fetherolf et al. (TESS)
Epoch
04 May 2023 (HJD 2460068.871) Ephemeris
Outburst --
Period 0.07620 d  (109.73 min)
Rise/eclipse dur. --
Remarks
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1 Riesen, Peter Triple system: The second and third component are almost certainly M dwarfs; inner astrometric binary with P = 474 d (separation 1.65 au); outer companion at a projected separation of 6.4 au discovered by VLT/SPHERE (2024RNAAS...8..206W).
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References
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1 Waisberg, I.; Klein, Y.; Katz, B., 2024, Hidden Companions to
Intermediate-mass Stars. XXII. Inferring a 0.43M ☉, 1.65 au Companion
in the Astrometric Binary within the Triple System Lambda Muscae
2024RNAAS...8..206W
2 Fetherolf, T.; et al., 2023, Variability Catalog of Stars Observed during
the TESS Prime Mission
2023ApJS..268....4F
3 Ricker, G. R.; et al., 2014, Transiting Exoplanet Survey Satellite (TESS) 2014SPIE.9143E..20R
4 Gray, R. O.; et al., 2006, Contributions to the Nearby Stars (NStars)
Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern
Sample
2006AJ....132..161G
5 Perryman, M. A. C.; et al., 1997, The HIPPARCOS and TYCHO catalogues 1997HIP...C......0E
External Links
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Images
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Supporting Documents
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1 Phase Plot - DSCT Riesen, Peter 2026-04-27 12:47 UTC Phase Plot from TESS data
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Revision History
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1 Riesen, Peter 2026-05-21 22:48 UTC Spectral type from 2006AJ....132..161G and 2024RNAAS...8..206W. Range derived from Hipparcos and GCPD data. Gaia DR3 position.