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Comet C/2010 X1 (Elenin)

31 Mar 2011, 12:01 UTC
Comet C/2010 X1 (Elenin)
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According to the current ephemerides, comet C/2010 X1 (Elenin) promises to became a nice binocular object at the end of next summer. As for many new comets, there is still some discussion about the maximum brightness this comet might actually reach.In order to provide further elements to the discussion, on 2011, March 14 we dedicated a few observing hours to C/2010 X1, using a couple of scopes kindly provided by the Tzec Maun Foundation: a RCOS 16" Ritchey-Chretien + CCD (located near Mayhill, NM) and a Takahashi TOA-150 f/7.3 refractor + CCD (located near Moorook, Australia).We used V and R photometric filters, and a selection of different calibrated reference stars (Tycho catalogue). The first analysis indicate a compact coma about 15 arcsec in diameter; within such aperture, we measured the following magnitudes: V= 16.7, R= 16.5, with an uncertainty about 0.5 magn in each color (photometry of faint comets is always a tricky business, so this data must be taken anyway with a certain amount of caution).The afrho parameter (proxy of the dust abundance within the coma) measured through an R-bessel filter, is close to a value 100 cm. Considering that the comet was about 3 Au from the Sun, ...

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