The recently discovered comet 2I/Borisov quickly became a prime target for comet observers during its perihelion approach in 2019 December, after it was discovered to be the first comet of interstellar origin. We present our observations and measurements of the dust production between 2019 October, when the interstellar comet became bright enough for small aperture telescopes, and 2020 January, when the comet entered the plane of the Milky Way. We observed the comet for 24 nights using three telescopes in the public iTelescope network. The telescopes spanned both the Northern and Southern hemispheres, were of similar aperture size (0.43–0.51 m), and employed a Johnson–Cousins R _C filter. Using these data, we measure an A(0)f ρ range of 94 14 to 139 34 cm, a dust production rate Q _dust range of 11.2 4.4 to 16.4 7.3 kg s⁻¹, and a dust-brightness profile-parameter range of −0.95 0.11 to −1.81 0.20 for the interstellar comet. This work revealed low dust production rates from the comet that remained consistent throughout its apparition, with no notable brightening or increase in dust production throughout the observing campaign.

最近发现的 2I/鲍里索夫彗星在 2019 年 12 月的近日点接近期间迅速成为彗星观测者的主要目标，因为它被发现是第一颗星际起源彗星。我们展示了我们对 2019 年 10 月（这颗星际彗星变得足够亮以供小孔径望远镜使用）和 2020 年 1 月（彗星进入银河系平面）之间的尘埃产生的观测和测量结果。我们使用公共 iTelescope 网络中的三台望远镜观察了这颗彗星 24 夜。望远镜跨越两个北半球和南半球，是相似的孔径尺寸（0.43-0.51米）的，并且采用的约翰逊-曾斯- [R _Ç滤波器。使用这些数据，我们测量A (0) f ρ范围为 94 14 至 139 34 cm，尘埃产生率Q _尘埃范围为 11.2 4.4 至 16.4 7.3 kg s ^-1，星际彗星的尘埃亮度剖面参数范围为 -0.95 0.11 至 -1.81 0.20。这项工作揭示了彗星的低尘埃产生率，在其出现期间保持一致，在整个观测活动中没有明显的增亮或尘埃产生增加。