Abstract
In the past research of 433 Eros [1] mentioned that there would probably become the Earth-crossing asteroid within many numerical simulation tests. In this research, we deeply investigated the orbital evolution of 433 Eros. In addition to simulate 433 Eros' orbital evolution, we checked when Eros encounters the Earth, and even hits the Earth. Then, since with long-time simulations...
Over the past decades, photometric methods have led to the discoveries of thousands of exoplanets. While similar techniques have been used to search for exomoons, none have been confirmed. We aim to survey potential exomoons using Transiting Exoplanet Survey Satellite (TESS) data and present a case study to illustrate our methodology. Based on previously proposed systems with exomoon...
Non-thermal escape via hot oxygen production, primarily from the dissociative recombination of O₂⁺, significantly influences atmospheric loss on Mars. These hot oxygen atoms can collide with other atmospheric species, such as helium and minor gases, affecting their energy distributions and contributing to escape processes. Previous studies have indicated that solar wind helium contributes...
Binary asteroids provide crucial information of the solar system evolution. This study presents a machine learning (ML) approach, using Random Forest classifiers, to identify binary asteroids from lightcurves. We aim to study the population of binary asteroids in the main asteroid belt. To achieve this, we develop the asteroids model to simulate the lightcurves as the training set, which...
We present an analysis of observations pointing on the trailing L5 cloud using the Zwicky Transient Facility in early Oct and Nov of 2024. The obtained images with the g' and r' filter allowed for the measurement of g − r color. We detected 579 Trojans in the observed fields, and the median value of g'-r' color is $0.633\pm0.094$. Because each target had at least five g-r data sets and...
One of the most fascinating and difficult tasks in contemporary astronomy is the finding of exomoons, the moons orbiting exoplanets. In order to find possible exomoons, this study investigates the use of transit timing variations (TTV) and transit duration variations (TDV) as indirect methods. Our goal is to find the dynamical signatures that indicate to the gravitational impact of an orbiting...
We present our time-series spectroscopic observation of comet 12P/Pons-Brooks using the LISA spectrograph mounted on the Lulin One-meter Telescope. The data were obtained between 25 November, 2023 and 24 March 2024, with heliocentric distances from 2.463 to 0.941 au at the pre-perihelion epoch. We clearly detected the emission features of CN, C₂, C₃, NH₂, and OI, and estimated the production...
Io, Jupiter's most volcanically active moon, has a dynamic atmosphere primarily composed of sulfur dioxide (SO₂). Minor atmospheric components, such as sulfur monoxide (SO), sodium chloride (NaCl), and potassium chloride (KCl), are likely produced by volcanic outgassing. Some SO also originates from the photodissociation of SO₂. These components serve as indicators of atmospheric processes and...
