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Details for Revision 3
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Name
  ZZ Mic  
AAVSO UID
000-BCW-376 (18164 observations)  
Constellation
Microscopium Sequence
J2000.0
21 00 35.20 -42 39 20.3  (315.14667 -42.65564) Search nearby
B1950.0 20 57 17.59 -42 51 05.7
Galactic coord. 358.644 -41.193
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 2054-43 ASAS J210035-4239.4 CD-43 14310
CPD-43 9351 HD 199757 HIP 103684
PPM 326757 SAO 230477 TYC 7973-401-1
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Variability type
HADS
Spectral type A3-A8V
Mag. range
9.27 - 9.59 V
Discoverer --
Epoch
10 Jul 2003 (HJD 2452830.689) Ephemeris
Outburst --
Period 0.0671792 d  (96.7380 min)
Rise/eclipse dur. 40%  (38.70 min)
Remarks
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1 Otero, Sebastian Alberto Single mode.
2 GCVS Team (k - b)2 = 021; Delta(S) = 0. P var? Max = 2437192.3131 + 0.0671786d*E (JD2437180 - 460) [J.Churms, D.S.Evans, Obs 81, 25, 1961.]; Max = 2439320.2162 + 0.0671575d*E (JD2439320 - 340) [K.C.Leung, AJ 73, 500, 1968.]; since JD2440440 - see Table. Further period increase is possible [L.A.Balona, W.L.Martin, MN 184, 11, 1978.]. According to [J.R.Percy, MN 181, 647, 1977.] there are two simultaneous oscillations with the periods P1 and P2: P1 = 0.0654d, P2 = 0.0513d. P2/P1 = 0.784; A2(U) = 0.25 A1(U).
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References
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1 Axelsen, R. A.; Napier-Munn, T. , 2015, Recently Determined Light Elements
for the delta Scuti Star ZZ Microscopii		 2015JAVSO..43...50A
2 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
3 C.R.Chambliss, ApJ 165, 365, 1971. 1971ApJ...165..365C
4 J.S.Drilling, A.G.D.Philip, TTB 5, N35, 307, 1970. --
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Supporting Documents
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
6 Otero, Sebastian Alberto 2025-10-21 15:58 UTC Period from AAVSO data.
5 Otero, Sebastian Alberto 2024-11-14 17:52 UTC Period from AAVSO data.
4 Otero, Sebastian Alberto 2021-07-20 20:54 UTC Period from 2015JAVSO..43...50A.
3 Otero, Sebastian Alberto 2011-10-27 00:07 UTC Type, period, epoch and range from ASAS-3 and Hipparcos data.
2 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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