Exploratory CCD photometric observations at Tillong Science Center, National Astronomical Observatory
Hakim L. Malasan(1,3), E. Sungging Mumpuni(2), Abdul Rachman(2), Andreas C. Louk (4), J.A. Utama (5),, Rizky Kurniawan (3), Ghaida Suroya (5), Furtuosa D.F. Amaral(4)

(1) Institut Teknologi Bandung
(2) ORPA National Research and Innovation Agency
(3) Sumatra Institute of Technology
(4) The University of Nusa Cendana
(5) Indonesia University of Education

Abstract

We have made CCD absolute photometric observations at Tilong Science Center, Kupang, NTT in two nights on September 2022. The telescope used was a 25 cm (F/10.0) Takahashi Mewlon-250CRS Reflector, equipped with an SBIG STF 8300M CCD camera and set of BVR Bessel Filters. In general the sky was partially clear, with a photometric night on 26 September 2022. The aims are to deduce atmospheric extinction coefficients, colour coefficients, zero point photometric system, and sky brightness above Tilong.
Besides 8 fields stars (Landolt, 1992), we also observered standard photometric open cluster, IC 4665. In general the obtained data is good in term of its quality. Results of the observations will be presented, and discussions on the deduced parameters will be given. Recommendation for a regular based absolute photometric observations in Tilong Science Center as well as at Timau Observatory will be outlined.

Keywords: Astronomical photometry, CCD, Observatory

Topic: EARTH, ATMOSPHERIC, AND SPACE SCIENCE