Study of hydrated asteroids via their polarimetric properties at low phase angles  
Geem, J., Ishiguro, M., Naito, H., Hasegawa, S., Takahashi, J., Bach, Y.P., Jin, S., Takagi, S., Ono, T., Kuroda, D., Sekiguchi, T., Kuramoto, K., Nakamura, T., Watanabe, M.
Astronomy & Astrophysics, 688, A195 (2024)

Spectral Type and Geometric Albedo of (98943) 2001 CC21, the Hayabusa2# Mission Target  
Geem, J., Ishiguro, M., Granvik, M., Naito, H., Akitaya, H., Sekiguchi, T., Hasegawa, S., Kuroda, D., Oono, T., Bach, Y.P., Jin, S., Imazawa, R., Kawabata, K.S., Takagi, S., Yoshikawa, M., Djupvik, A.A., Gadeberg, J.T., Pursimo, T., Pedros, O.D., Thomsen, J.S., Gray, Z.
Monthly Notices of the Royal Astronomical Society, 525, L17–L21 (2023)

(3200) Phaethon polarimetry in the negative branch: new evidence for the anhydrous nature of the DESTINY+ target asteroid  
Geem, J., Ishiguro, M., Takahashi, J., Akitaya, H., Kawabata, K., Nakaoka, T., Imazawa, R., Mori, F., Jin, S., Bach, Y., Jo, H., Kuroda, D., Hasegawa, S., Yoshida, F., Ishibashi, K., Sekiguchi, T., Beniyama, J., Arai, T., Ikeda, Y., Shinnaka, Y., Granvik, M., et al.
Monthly Notices of the Royal Astronomical Society, 516(1), L53–L57 (2022)

A polarimetric study of asteroids in comet-like orbits  
Geem, J., Ishiguro, M., Bach, Y., Kuroda, D., Naito, H., Hanayama, H., Kim, Y., Kwon, Y., Jin, S., Sekiguchi, T., Okazaki, R., Vaubaillon, J., Imai, M., Oono, T., Futamura, Y., Takagi, S., Sato, M., Kuramoto, K., & Watanabe, M.
Astronomy & Astrophysics, 658, A158 (2022)

Lim, B., Ishiguro, M., Takahashi, J., Akitaya, H., Geem, J., Bach, Y.P., Jin, S., Jo, H., Choi, S., Seo, J., Kawabata, K.S., Hori, T., Maruta, T., & Im, M. (2025). Optical and near-infrared contemporaneous polarimetry of C/2023 A3 (Tsuchinshan-ATLAS). The Astronomical Journal, 983, 1, L19.

Bourdelle de Micas, J., Perna, D., Fornasier, S., Dotto, E., Ieva, S., Barucci, M.A., Geem, J., Hasegawa, S., Ishiguro, M., Kitazato, K., Kuroda, D., Mazzotta Epifani, E., Palomba, E., Yoshikawa, M., & Hirabayashi, M. (2025). Spectral and photometric characterization of (98943) Torifune in preparation for the Hayabusa2# spacecraft flyby. Astronomy & Astrophysics, 693, L19.

Jin, S., Ishiguro, M., Geem, J., Naito, H., Takahashi, J., Akitaya, H., Kuroda, D., Urakawa, S., Takagi, S., Oono, T., Sekiguchi, T., Perna, D., Ieva, S., Bach, Y.P., Imazawa, R., Kawabata, K.S., Watanabe, M., & Jo, H. (2024). New evidence supporting past dust ejections from active asteroid (4015) Wilson-Harrington. Astronomy & Astrophysics, 690, A193.

Hasegawa, S., Marsset, M., DeMeo, F.E., Hanuš, J., Binzel, R.P., Bus, S.J., Burt, B., Polishook, D., Thomas, C.A., Geem, J., Ishiguro, M., Kuroda, D., & Vernazza, P. (2024). Candidate Main-belt Asteroids for Surface Heterogeneity. The Astronomical Journal, 167(5), 224.

Bach, Y., Ishiguro, M., Takahashi, J., Geem, J., Kuroda, D., Naito, H., Kwon, J. (2024). Quantitative grain size estimation on airless bodies from the negative polarization branch. II. Dawn mission targets (4) Vesta and (1) Ceres. Astronomy & Astrophysics, 684, A81.

Bach, Y., Ishiguro, M., Takahashi, J., Geem, J., Kuroda, D., Naito, H., Kwon, J. (2024). Quantitative grain size estimation on airless bodies from the negative polarization branch. I. Insights from experiments and lunar observations. Astronomy & Astrophysics, 684, A80.

Kang, J., Chae, J., Geem, J. (2024). A Statistical Analysis of Spiral-shaped Wave Patterns in Sunspot Umbrae. The Astronomical Journal, 960, 115.

Beniyama, J., Sekiguchi, T., Kuroda, D., Arai, T., Ishibashi, K., Ishiguro, M., Yoshida, F., Senshu, H., Ootsubo, T., Sako, S., Ohsawa, R., Takita, S., Geem, J., & Bach, Y. (2023). Simultaneous multicolor photometry of the DESTINY+ target asteroid (3200) Phaethon. Publications of the Astronomical Society of Japan, 75(2), 297–310.

Ishiguro, M., Bach, Y., Geem, J., Naito, H., Kuroda, D., Im, M., Lee, M., Seo, J., Jin, S., Kwon, Y., Oono, T., Takagi, S., Sato, M., Kuramoto, K., Ito, T., Hasegawa, S., Yoshida, F., Arai, T., Akitaya, H., Sekiguchi, T., Okazaki, R., Imai, M., Ohtsuka, K., Watanabe, M., Takahashi, J., Devogele, M., Fedorets, G., Siltala, L., & Granvik, M. (2022). Polarimetric properties of the near-Sun asteroid (155140) 2005 UD in comparison with other asteroids and meteoritic samples. Monthly Notices of the Royal Astronomical Society, 509(3), 4128–4142.

Hasegawa, S., DeMeo, F., Marsset, M., Hanuš, J., Avdellidou, C., Delbo, M., Bus, S., Hanayama, H., Horiuchi, T., Takir, D., Jehin, E., Ferrais, M., Geem, J., Im, M., Seo, J., Bach, Y., Jin, S., Ishiguro, M., Kuroda, D., Binzel, R., Nakamura, A., Yang, B., & Vernazza, P. (2022). Spectral Evolution of Dark Asteroid Surfaces Induced by Space Weathering over a Decade. The Astronomical Journal, 939(1), L9.

Bach, Y., Ishiguro, M., Takahashi, J., & Geem, J. (2022). Data Reduction Process and Pipeline for the NIC Polarimetry Mode in Python, NICpolpy. Stars and Galaxies, 5, 4.

Hasegawa, S., Marsset, M., DeMeo, F., Bus, S., Geem, J., Ishiguro, M., Im, M., Kuroda, D., & Vernazza, P. (2021). Discovery of Two TNO-like Bodies in the Asteroid Belt. The Astrophysical Journal, 916(1), L6.

Kuroda, D., Geem, J., Akitaya, H., Jin, S., Takahashi, J., Takahashi, K., Naito, H., Makino, K., Sekiguchi, T., Bach, Y., Seo, J., Sato, S., Sasago, H., Kawabata, K., Kawakami, A., Tozuka, M., Watanabe, M., Takagi, S., Kuramoto, K., Yoshikawa, M., Hasegawa, S., & Ishiguro, M. (2021). Implications of High Polarization Degree for the Surface State of Ryugu. The Astrophysical Journal, 911(2), L24.

Ishiguro, M., Kuroda, D., Watanabe, M., Bach, Y., Geem, J., Lee, M., Sekiguchi, T., Naito, H., Ohtsuka, K., Hanayama, H., Hasegawa, S., Usui, F., Urakawa, S., Imai, M., Sato, M., & Kuramoto, K. (2017). Polarimetric Study of Near-Earth Asteroid (1566) Icarus. The Astronomical Journal, 154(5), 180.