Spliting of C/2007 Q3 (Siding spring) nucleus

Alison Tripp and Nick Howes succesfully observe C/2007 Q3 (Siding spring) on March 27 and April 2 at the FTN (Faulkes Telescope North , Haleakala, Hawaii). After images stacking and futher processing, fragment b is clearly visible with offset about 6.5″ from fragment a. In this case I don’t use deconvolution, because fragment b can be measured without any filters. From previous images, obtained on March 23 and 25, splitted object increased distance from parent body.

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New editorial notice by MPC

The MPC has issued the new statement in MPC 69147. From now there is no point in submitting two-night discoveries, as they won’t be given priority over one-night discoveries received earlier by the MPC. As we can see, MPC gain an advantage to large sky surveys, and number of amateur discoveries will be reduced drastically.

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Quaoar – new study of Kuiper belt objects

Today was published new preprint about study of Quaoar-Weywot Kuiper belt binary.

Authors of this work is Wesley Fraser, Michael Brown from California Institute of Technology.

They report about WFPC2 observations of the Quaoar-Weywot system with WFPC2 of Hubble space telescope. From these observations they find that Weywot is on an elliptical orbit with eccentricity of e = 0.14±0.04, period of T = 12.438 ± 0.005 days. Scientist find, new estimated size, a diameter for Quaoar of D = 890±70 km and density to be ? = 4.2±1.3 g/cm3 – possibly the highest density in the Kuiper belt. This fact may indicate what Quaoar have collisionally origin, or what this object may formed more closely to the Sun.

http://arxiv.org

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Spliting of C/2007 Q3 (Siding spring) nucleus

The astrometrical measurements of fragment b of C/2007 Q3, taken on Tzec Maun and Tenagra II observatories, officially published by MPC in MPEC 2010-F87 circular.

The existence of second fragment is not confirmed at this time.

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Spliting of C/2007 Q3 (Siding spring) nucleus

When I seen information about spliting C/2007 Q3 nucleus, I tried to shot this event. Fragment is clearly visible on images taken on Tzec Maun and Tenagra II observatories on March 23 and 25. After processing stacked images I measure position of splited body. This object offset from parent body on 6? PA 245°. All inforamtion sended to CBAT.

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