Borderline hyperbolic comet C/2021 O3 (PANSTARRS) was fading as it approached the Sun
We present an observational and numerical study of the borderline hyperbolic comet C/2021 O3 (PANSTARRS) performed during its recent passage through the inner Solar system. Our observations were carried out at OASI and SOAR between 2021 October and 2022 January, and reveal a low level of activity relative to which was measured for other long-period
Evangelista-Santana, M. et al.
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2023