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HD 173693

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Long-term photometry of Be stars. II. Periodic variations on time scales of days to months. Stroemgren differential uvby photometry of 4 Be stars is analysed. Thedata were taken during the time interval 1983-1994 in the framework ofthe Long-Term Photometry of Variables project at La Silla. We detectedin these four stars periodic photometric variations with periods between4 and 93 days. The two cases with the longest periods (FT CMa withP=87.9d and FY CMa with P=92.7d) did not have any previously knownperiodic variability. In three of the four cases the periodicoscillation was coherent and always present during the 10 years ofmonitoring.
Longterm Photometry of Variables at ESO - Part Two - the Second Data Catalogue 1986-1990 Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1993A&AS..102...79S&db_key=AST
Long-term photometry of variables at ESO. I - The first data catalogue (1982-1986) This paper presents the catalog of photometric data in the Stromgrensystem obtained during the first four years (October 1982 - September1986) of the Long-Term Photometry of Variables (LTPV) program at ESO.The data are available in computer-readable form.

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Osservazione e dati astrometrici

Costellazione:	Scudo
Ascensione retta:	18^h46^m54.70^s
Declinazione:	-07Â°34'44.8"
Magnitudine apparente:	7.247
Distanza:	331.126 parsec
Moto proprio RA:	3.7
Moto proprio Dec:	-0.8
B-T magnitude:	7.479
V-T magnitude:	7.267

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 173693
TYCHO-2 2000	TYC 5693-6849-1
USNO-A2.0	USNO-A2 0750-14568436
HIP	HIP 92150

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