In 2015, a joint collaboration project to build a new observatory in Mount Timau, East Nusa Tenggara was initiated between LAPAN, ITB, UNDANA, Kupang Regency and East Nusa Tenggara governments. The site selection is based on preliminary studies conducted on nearby location. This paper presents in situ measurements report on seeing, weather and sky brightness obtained on July 2018 using Differential Image Motion Monitor (DIMM) with 20 cm-telescope, Davis Vantage Vue automatic weather station, and Sky Quality Meter, respectively. Despite the high humidity and foggy condition on the afternoon, the site has good seeing condition with median of 0.93 arcsecond and sky brightness around 22.18 magnitude per arcsecond square after midnight.
Abstract. With over 80 years of existence, Bosscha Observatory in Lembang, West Java, Indonesia, still stands as one of the largest observatories that is registered by International Astronomical Union in the South East Asia region. Since first commissioned by the NISV (Netherlands Indische Sterrenkundige Vereeniging), Bosscha Observatory had played a major role in astronomy, particularly in research and observational activities in the southern hemisphere. But the current development has produced a serious impact on Bosscha Observatory, both tangible and intangible. With the challenges Bosscha Observatory faced the past decades, what can be done in the future to conserve not only the tangible value but most importantly the intangible value it embraces for the scientific development? This paper emphasizes its values, and opens some perspectives and ideas for conserving a (candidate to) Astronomy and World Heritage site. This important issue of how to best preserve the scientific value of this scientific heritage it embodied is discussed in some detail.
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