50 citations · 117 across the 15 of their papers we have counts for
15 papers
Multiband Color Monitoring of 3I/ATLAS through Ground-Based Relay Observations
Ariel Graykowski, Bryce Bolin, Laura-May Abron +140
We present multiband, long-baseline photometric observations of interstellar comet 3I throughout its 2025--2026 apparition using coordinated ground-based global relay observations.…
Rotation, spectral type, and albedo of the potentially hazardous asteroid (153814) 2001 WN Prior to the 2028 June close approach
Jin Beniyama, Alexey V. Sergeyev, Konstantinos Odysseas Xenos +6
The potentially hazardous asteroid (153814) 2001 WN will pass inside the lunar distance on June 26, 2028, offering a rare opportunity to characterize a kilometer-scale near-Ear…
Simultaneous Tricolor Video Observations of Three Tiny Near-Earth Asteroids with Sub-Minute Rotation Periods
Jin Beniyama, Ryou Ohsawa, Shigeyuki Sako +4
Studying the physical properties of near-Earth asteroids (NEAs) is crucial for understanding their dynamical histories and origins, and assessing impact hazards to Earth. Tiny NEAs…
Simultaneous visible spectrophotometry of interstellar object 3I/ATLAS with Seimei/TriCCS
Jin Beniyama
3I/ATLAS, also known as C/2025 N (ATLAS), is the third interstellar object (ISO) discovered in July 2025. ISOs are particularly interesting because characterizing their physica…
Multi-epoch spectro-photometric characterization of the minimoon 2024 PT in the visible and near-infrared
Jin Beniyama, Bryce T. Bolin, Alexey V. Sergeyev +5
2024 PT is a tiny ( m) near-Earth asteroid (NEA) discovered in August 2024. 2024 PT was gravitationally bound to the Earth-Moon system from September to November 2…
Size Constraint on Hayabusa2 Extended Mission Rendezvous Target 1998~KY via VLT/VISIR Non-detection
Jin Beniyama, Thomas G. Müller, Marco Delbo +4
1998~KY is a tiny near-Earth asteroid () discovered in 1998. It has been selected as the target of the Hayabusa2 extended mission, which will rendezvous with 1998 KY…
Keck and Gemini characterization of rendezvous target 1998 KY
Bryce T. Bolin, Christoffer Fremling, Matthew Belyakov +7
Near-earth object (NEO) 1998 KY is a target of the spacecraft, which it will rendezvous with in July 2031. The asteroid is a rapid rotator and has a large out-…
Rotation state, colors, and albedo of the mission-accessible tiny near-Earth asteroid 2001 QJ
Jin Beniyama, Alexey V. Sergeyev, David J. Tholen +1
Context. Characterizing mission-accessible asteroids using telescopic observations is fundamental for target-selection and planning for spacecraft missions. Near-Earth asteroids on…
Multicolor Photometry of Tiny Near-Earth Asteroid 2015 RN Across a Wide Range of Phase Angles: Possible Mission Accessible A-type Asteroid
Jin Beniyama, Ryou Ohsawa, Chrysa Avdellidou +10
Studying small near-Earth asteroids is important to understand their dynamical histories and origins as well as to mitigate the damage of the asteroid impact to the Earth. We repor…
Photometry and Polarimetry of 2010 XC: Observational Confirmation of E-type Near-Earth Asteroid Pair
Jin Beniyama, Shigeyuki Sako, Katsuhito Ohtsuka +16
Asteroid systems such as binaries and pairs are indicative of physical properties and dynamical histories of the Small Solar System Bodies. Although numerous observational and theo…
Simultaneous Multicolor Photometry of the DESTINY target asteroid (3200) Phaethon
Jin Beniyama, Tomohiko Sekiguchi, Daisuke Kuroda +11
Accurate estimation of brightness of (3200) Phaethon up to lower phase angles are essential for planning of the on-board camera of the DESTINY mission. We have carried out in…
(3200) Phaethon Polarimetry in the Negative Branch: New Evidence for the Anhydrous Nature of the DESTINY+ Target Asteroid
Jooyeon Geem, Masateru Ishiguro, Jun Takahashi +23
We report on the first polarimetric study of (3200) Phaethon, the target of JAXA's DESTINY mission, in the negative branch to ensure its anhydrous nature and to derive an accur…
Video Observations of Tiny Near-Earth Objects with Tomo-e Gozen
Jin Beniyama, Shigeyuki Sako, Ryou Ohsawa +20
We report the results of video observations of tiny (diameter less than 100 m) near-Earth objects (NEOs) with Tomo-e Gozen on the Kiso 105 cm Schmidt telescope. A rotational period…
Detection of highly correlated optical and X-ray variations in SS Cygni with Tomo-e Gozen and NICER
Y. Nishino, M. Kimura, S. Sako +8
We report on simultaneous optical and X-ray observations of the dwarf nova SS Cyg with Tomo-e Gozen/1.05 m Kiso Schmidt and Neutron star Interior Composition ExploreR (it NICER) /…
Discovery of the Fastest Early Optical Emission from Overluminous SN Ia 2020hvf: A Thermonuclear Explosion within a Dense Circumstellar Environment
Ji-an Jiang, Keiichi Maeda, Miho Kawabata +28
In this Letter we report a discovery of a prominent flash of a peculiar overluminous Type Ia supernova, SN 2020hvf, in about 5 hours of the supernova explosion by the first wide-fi…