Tatsuharu Oono

New evidence supporting past dust ejections from active asteroid (4015) Wilson–Harrington

Sunho Jin, Masateru Ishiguro, Jooyeon Geem, Jun Takahashi et autres

Context. (4015) Wilson-Harrington (hereafter, WH) was discovered as a comet in 1949 but has a dynamical property consistent with that of a near-Earth asteroid. Although there is a report that the 1949 activity is associated with an ion tail, the cause of …

kr, jp, it (code pays fourni par la source)

New evidence supporting past dust ejections from active asteroid (4015) Wilson-Harrington

Sunho Jin, Masateru Ishiguro, Jooyeon Geem, Hiroyuki Naito et autres

Context. (4015) Wilson-Harrington (hereafter, WH) was discovered as a comet in 1949 but has a dynamical property consistent with that of a near-Earth asteroid. Although there is a report that the 1949 activity is associated with an ion tail, the cause of …

成層圏テレスコープ(FUJIN-2)による金星紫外吸収物質の同定

Makoto Taguchi, Rintaro EGUCHI, Yasuhiro Shoji, Taro Nishide et autres

jp (code pays fourni par la source)

FUJIN2の姿勢制御システムの開発と評価

Taro Nishide, Naoki Kawasuji, Toshihiko Nakano, Masataka Imai et autres

jp (code pays fourni par la source)

Spectral type and geometric albedo of (98943) 2001 CC21, the Hayabusa2# mission target

Jooyeon Geem, Masateru Ishiguro, Mikael Granvik, Hiroyuki Naito et autres

ABSTRACT We conducted optical polarimetry and near-infrared spectroscopy of Japan Aerospace Exploration Agency (JAXA)’s Hayabusa2# mission target, (98943) 2001 CC21, in early 2023. Our new observations indicate that this asteroid has a polarimetric inversion angle of ∼20°, absorption bands around 0.9 and …

kr, fi, se, jp, dk, es, it, gb (code pays fourni par la source)

Spectral Type and Geometric Albedo of (98943) 2001 CC21, the Hayabusa2# Mission Target

Jooyeon Geem, Masateru Ishiguro, Mikael Granvik, Hiroshi Akitaya et autres

We conducted optical polarimetry and near-infrared spectroscopy of JAXA's Hayabusa2# mission target, (98943) 2001 CC21, in early 2023. Our new observations indicate that this asteroid has a polarimetric inversion angle of ~20\(^\circ\), absorption bands around 0.9 and 1.9 \(\mu\)m, and a geometric …

kr, fi, jp, es (code pays fourni par la source)

Spectral Type and Geometric Albedo of (98943) 2001 CC21, the Hayabusa2# Mission Target

Jooyeon Geem, Masateru Ishiguro, Mikael Granvik, Hiroyuki Naito et autres

We conducted optical polarimetry and near-infrared spectroscopy of JAXA's Hayabusa2# mission target, (98943) 2001 CC21, in early 2023. Our new observations indicated that this asteroid has a polarimetric inversion angle of ~21 deg, absorption bands around 0.9 and 1.9 um, and a …

Polarimetric properties of the near-Sun asteroid (155140) 2005 UD in comparison with other asteroids and meteoritic samples

Masateru Ishiguro, Yoonsoo P. Bach, Jooyeon Geem, Hiroyuki Naito et autres

The investigation of asteroids near the Sun is important for understanding the final evolutionary stage of primitive Solar system objects. A near-Sun asteroid (NSA), (155140) 2005 UD, has orbital elements similar to those of (3200) Phaethon (the target asteroid for the JAXA's …

kr, jp, de, us, pr, gb, fi, es, se (code pays fourni par la source)

Polarimetric properties of the near-Sun asteroid (155140) 2005 UD in comparison with other asteroids and meteoritic samples

Masateru Ishiguro, Yoonsoo P. Bach, Jooyeon Geem, Hiroyuki Naito et autres

ABSTRACT The investigation of asteroids near the Sun is important for understanding the final evolutionary stage of primitive Solar system objects. A near-Sun asteroid (NSA), (155140) 2005 UD, has orbital elements similar to those of (3200) Phaethon (the target asteroid for the …

kr, jp, de, us, pr, gb, fi, es, se (code pays fourni par la source)

A polarimetric study of asteroids in comet-like orbits

Jooyeon Geem, Masateru Ishiguro, Yoonsoo P. Bach, D. Kuroda et autres

Context. Asteroids in comet-like orbits (ACOs) consist of asteroids and dormant comets. Due to their similar appearance, it is challenging to distinguish dormant comets from ACOs via general telescopic observations. Surveys for discriminating dormant comets from the ACO population have been conducted …

kr, jp, de, fr (code pays fourni par la source)

成層圏テレスコープ(FUJIN-2)による金星紫外吸収物質の同定

真 田口, 泰弘 莊司, 壽彦 中野, 幸弘 高橋 et autres

Lunar Occultation Observations of Double Stars â Report #6

Brian Loader, J. Bradshaw, D. Breit, J. Hernández Fuertes et autres

Reports are presented of lunar occultations of close double stars observed using video including cases where a determination of the position angle and separation of the pair can be made and other cases where no duplicity has been observed. A number of …