Photometry of distant active comet C/2010 S1 (LINEAR)

• Опубліковано в: : Advances in Astronomy and Space Physics
• Дата: 2014
• Автори: Shubina, O., Kulyk, I., Korsun, P., Romanjuk, Ya.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Головна астрономічна обсерваторія НАН України 2014
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/119809
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Photometry of distant active comet C/2010 S1 (LINEAR) / O. Shubina, I. Kulyk, P. Korsun, Ya. Romanjuk // Advances in Astronomy and Space Physics. — 2014. — Т. 4., вип. 1-2. — С. 38-41. — Бібліогр.: 15 назв. — англ.

We present the results of photometric observations of a dynamically new comet C/2010 S1 (LINEAR), conducted on June 18, 2012. The comet demonstrated a considerable level of physical activity at a heliocentric distance of 6.3 AU. The brightness, measured under a phase angle of 8.9 degrees, was equal to 14.55ᵐ±0.06ᵐ and 14.21ᵐ±0.04ᵐ in V- and R-bands, respectively. The brightness distribution over the coma was found to be inversely proportional to the projected onto the sky plane nucleocentric distance, with a slope of approximately −1. Therefore, the calculated Af ρ parameter, approximately 8400 cm and 8200 cm for V and R filters, respectively, was used to estimate the dust
 production rate. Assuming a steady outflow of dust particles from the nucleus, the dust production rate was estimated to be between 20 and 60 kg/s, depending on the assumed value of the grain's albedo. The V-R colour index obtained from the near-nucleus region of the coma is in agreement with the solar V-R colour index, and does not indicate significant reddening of the re ected solar radiation in the spectral region of 540-683 nm. 
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