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Name
  V4072 Sgr  
AAVSO UID
000-BCX-104 (547 observations)  
Constellation
Sagittarius Sequence
J2000.0
18 01 43.10 -32 42 55.0  (270.42958 -32.71528) Search nearby
B1950.0 17 58 26.45 -32 42 55.3
Galactic coord. 358.485 -4.891
Other names

(Internal only)
AAVSO 1755-32 ALS 4552 ASAS J180143-3242.9
CD-32 13623 CPD-32 5041 GSC 07395-00031
HD 164270 HIP 88287 Hen 3-1555
IRAS 17584-3243 LS 4552 MR 79
PPM 297143 SAO 209609 TYC 7395-31-1
WR 103    
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Variability type
ELL/WR+*
Spectral type --
Mag. range
8.74 (1.2) V
Discoverer --
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Another fading event on January-May 2020 (ASAS-SN and KWS data). Not eclipses but likely dust-fading events like in other WC stars. TESS data show lots of periods (4.051, 2.918, 1.5266 an 1.1942 d., total amplitude 0.11 TESS) but not traces of the 1.75 d. ellipsoidal period reported.
2 Otero, Sebastian Alberto 0.1 mag. variability at maximum. Possible eclipses (1.2 mag. duration 40 d.) at JD 2418560 (1909, Sept. 11) and 2444412 (1980, June 21) (1984PASP...96..618M). Ellipsoidal periods of 1.7556 d. in 1981A&A....96..133I or 1.75404 d. in 1986PASP...98.1170M are not confirmed by ASAS-3 data and data in 1986A&A...162..109V.
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References
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1 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0		 2017PASP..129j4502K
2 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)		 2012arXiv1210.0821A
3 Pojmanski, G., 2002, The All Sky Automated Survey 2002AcA....52..397P
4 Moffat, A. F. J.; Lamontagne, R.; Cerruti, M., 1986, The variable WC9 star
HD 164270 revisited - A close binary with a precessing disk?		 1986PASP...98.1170M
5 van Genderen, A. M.; van der Hucht, K. A., 1986, The variability of the WC9
Wolf-Rayet star HD 164270		 1986A&A...162..109V
6 Massey, P.; Lundstrom, I.; Stenholm, B., 1984, The curious case of the
'eclipsing' WC9 star HD 164270		 1984PASP...96..618M
7 I.Lundstroem, B.Stenholm, IBVS N2021,1981. 1981IBVS.2021....1L
8 Isserstedt, J.; Moffat, A. F. J., 1981, The variable, single-line WC 9
Wolf-Rayet star HD 164270 with a low-mass companion		 1981A&A....96..133I
External Links
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Supporting Documents
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1 JD light curve Otero, Sebastian Alberto 2024-09-13 20:12 UTC Portion of TESS light curve showing the short period variability.
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
4 Otero, Sebastian Alberto 2024-09-13 20:12 UTC Type from TESS data.
3 Otero, Sebastian Alberto 2014-01-17 06:14 UTC Possible eclipsing type and spectral type from 1984PASP...96..618M.
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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