2026 天文年會 (ASROC Annual Meeting)

Session

Poster - Solar system and exoplanets

Not scheduled

College of Hakka Studies at NYCU, Zhubei, Hsinchu County 國立陽明交通大學客家學院(竹北六家校區)

67. Dynamical Evolution of Asteroid Maria Family

Xi-Feng Cha (Graduate Institute of astronomy, National Central University)

Poster

Maria Family is an old S-type asteroid family named after 170 Maria. Within the evolution, its members have separated with perturbation from 2.55 au distance to the Sun. There are two dynamical effects making them change their original orbits. One is mean-motion resonance (MMR), and the other is non-gravitational force, Yarkovsky effect. In this work we will investigate these two dynamical...

47. Investigating Time-Variable Structures in the Lunar Sodium Tail

Chen-Yen Hsu (IANCU)

Poster

Our Moon possesses a tenuous, collisionless "atmosphere", known as an "exosphere". In 1988, sodium was detected in the lunar exosphere through ground-based spectroscopic observations (Potter & Morgan, 1988). Due to solar radiation pressure acceleration, the sodium exosphere extends into a tail. When viewed in an Earth-centered coordinate frame, it exhibits a projected sodium spot with an...

148. Jupiter Trojan Colors and Size Distribution from ZTF High-Cadence and Survey Data

Po-CHih Chang (National Central University)

Poster

Jupiter Trojans are a population of co-orbital asteroids that share Jupiter’s orbit around the Sun. Owing
to their long-term dynamical stability, they are thought to preserve primordial material and thus provide key
constraints on early Solar System evolution and planetary migration models. In this study, we combine high
cadence observations from the Zwicky Transient Facility (ZTF)...

106. Searching for triple-detection Planet Nine candidates using far-infrared all-sky survey data

Mr Terry Long Phan (Institute of Astronomy, National Tsing Hua University)

Poster

The outer solar system is theoretically predicted to harbor an undiscovered planet, often referred to as Planet Nine (P9). Simulations suggest that its gravitational influence could explain the unusual clustering of distant Kuiper Belt Objects. However, no observational evidence for P9 has been found so far, as its predicted orbit lies far beyond Neptune, where it reflects only a faint amount...

54. Space Weather Effects on the Lunar Exosphere During ICMEs

Ian-Lin Lai (NCU)

Poster

The lunar exosphere, first identified during the Apollo missions, is a tenuous, collisionless surface-bounded environment composed of species with distinct origins and transport behaviors. Helium is primarily supplied by solar wind implantation, whereas sodium is mainly released from the lunar surface through sputtering and photon-stimulated desorption. Because intermolecular collisions are...

80. The subsurface evolution of the sun-skirting comets under extreme solar heating

WENCHUN LU

Poster

The passage of the Kreutz-family comey C/2026 A1 MAPS at a distance of less than 0.2 solar radii from the Sun on April 4 has drawn a lot of attention to its possible fate. That is, whether it will survive the perihelion passage like comet Ikeya-Seki in 1965 or it will be broken up into many fragments like the case of comet ISON in 2013 will be closely watched. We would like to take this...

73. The Time Variable Hydrogen Corona of Europa

You-Hao Chen

Poster

Europa, harboring a vast global ocean beneath its icy crust, is considered one of the most promising targets in the solar system for astrobiological exploration and habitability assessment. Understanding its surface chemical evolution and mass loss is crucial for deciphering the composition of the hidden ocean.
Europa is located within the magnetosphere of Jupiter. The electrons and heavy...

96. 一個關於角動量與月球起源模型的再回顧

Ms Rui-Zhen Wang (國立中山大學附屬國光中學)

Poster

本報告嘗試盡可能定量地討論角動量在月球起源模型中存在的問題

目前的主流理論巨大撞擊說（Giant Impact Hypothesis）（地球與忒伊亞相撞）
雖然大致成功, 人為假設外來的一次「斜向撞擊」注入適量角動量,撞擊後拋出的物質形成盤, 凝聚成月球產生地球自轉月球公轉兩者方向一致,電腦模擬可以重現接近現今的角動量數值符合觀測
而同源形成說（Co-formation）（地球與月球一起從原始盤形成）從角動量的定量估算, 探討地球與月球繞太陽運行彼此之間的角動量耦合強度,是否有辦法解釋月球目前的軌道距離及地月之間的角動量如何分配,
本報告主要希望透過回顧角動量的基本定義,嘗試探討是否有可能的基本物理演化機制來形成現在的結構及觀測到的角動量配置, 而不需要一隻外來的魔手的幫助。

18. 小行星掩星觀測的業餘研究潛力

CHUNG-EN LEE (臺南市南瀛天文館)

Poster

本研究介紹兩起小行星掩星觀測案例，說明掩星觀測在業餘天文研究中的潛力。小行星(508) Princetonia的掩星事件，觀測資料顯示短暫的第二次減光，暗示該小行星可能存在尚未確認的衛星。小行星(15848) 1995 YJ4的掩星事件，其光變曲線亮度下降幅度低於預期，結合恆星的天文測量資料，推測被掩星HIP 77025可能為一個尚未確認的雙星系統。