In this paper, we present the analysis of the stellar system HIP 101227 to determine the actual number of components in the system, and their properties. We use dynamical modeling and complex spectrophotometric (involving atmospheric modeling) techniques with recent data, to determine the physical properties and orbital solution for the system, respectively, with better accuracy than past studies. Based on our analysis, we found that the system is more consistent with being a quadruple rather than a binary or a triple system as suggested by previous studies. The total mass of the system determined from our SED analysis is 3.42 ± 0.20 M ⊙, which is distributed almost equally between the four stars. The stars are found to be zero-age main sequence stars; i.e., at the last stage of pre-main sequence, with age less than 200 Myr and spectral types K0. All four stars have very similar physical characteristics, suggesting that the fragmentation process is the most likely theory for the formation and evolution of the system.

In this paper, we present the UAE Meteor Monitoring Network (UAEMMN) project. The system is intended to detect space debris (natural ones, i.e., meteors, or man-made, i.e., satellite debris). Presently, this research primarily focuses on meteors. The network consists of three towers, with each tower equipped with 17 cameras. The three towers are located at three different locations in the UAE (Sharjah, Al-Yahar, and Liwa) to cover the whole UAE sky. The meteors are detected through different types of sensitive cameras (6 mm, 8 mm, and a fisheye lens). These cameras can only see debris entering the Earth's atmosphere, hence posing no threat anymore. The “UFO” software is used to analyze the captured space debris data and projects the possible trajectory and landing location in the UAE. However, these falling locations are only relevant to the rare meteorite droppers among the observed fireballs. The UAEMMN system was able to detect a large number of meteors, with the Liwa station scoring the highest hit because of its dark sky desert location. This paper will mainly emphasize on the construction of the UAEMMN towers and compare the proposed framework with similar systems developed in other countries worldwide. Some preliminary results are presented to show the observation capabilities of the UAEMNN system. We will also {briefly} mention the role of this new system in the UAE Space Agency Space Situation Awareness program. The UAEMMN is operated by the Sharjah Academy for Astronomy, Space Sciences, and Technology (SAASST) located at Sharjah (UAE).

We present a detailed description of Sharjah Lunar Impact Observatory (SLIO), the only source of lunar impact observations in the Middle East and North Africa region. The Observatory was established on February 29th, 2020. It is located inside the campus of the Sharjah Academy of Astronomy, Space Sciences and Technology (SAASST), which is part of the University of Sharjah (UoS), Sharjah, United Arab Emirates. The coordinates of the Observatory are 25°17'02.1"N 55°27'48.4"E, with an altitude of 80 m above the sea level. It is equipped with a 14" LX 200 ACF Schmidt-Cassegrain Meade telescope with a focal ratio of 10 (f/10). The camera is a high-sensitivity Watec video camera of the model 902H Ultimate utilizing a 0.5" monochrome CCD Sony ICX439ALL sensor. It can record 25 fps with a resolution of 720 × 576 pixels. One of SLIO's results is recording a lunar impact detection on March 1st, 2020, at 16:54:22.969 UT, which was confirmed by the NELIOTA project in Greece. The flash magnitude of the impact was found to be 7.94 ± 0.36. The analysis estimated the mass of the impactor as 1.919 kg with a cometary origin, with a radius of 17.36 cm, and create a crater with a diameter around 2.84 m.