comet C/2009 R1 (McNAUGHT)

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Comet C/2009 R1 (McNAUGHT)

Observation date	image	Photometry (FOCAS)	Afρ	astrometry	Observatory
20100522	x	x		x	H10 - Tzec Maun
20100523	x	x		x	H10 - Tzec Maun
20100603	x	x		x	B96 - BRIXIIS
20100605	x	x		x	B96 - BRIXIIS
20100606	x	x		x	H10 - Tzec Maun
20100611	x	x		x	H10 - Tzec Maun

Comet C/2009 R1 (McNAUGHT) of Kronk’s Cometography

Discovery:

R. H. McNaught (Siding Spring Observatory, Australia) discovered this comet on five images obtained between 2009 September 9.62 and September 9.73. He was using the 0.5-m Uppsala Schmidt telescope and a CCD camera. The magnitude was given as 17.3-17.5. Pre-discovery images were subsequently found on images obtained at Siding Spring by McNaught and G. J. Garradd on 2009 July 20, August 1, and August 18. The magnitude was given as 18.5-18.9 on July 20. The first confirmation was obtained by astronomers at the ESA Optical Ground Station at Tenerife, Canary Islands on September 9.9. They gave the magnitude as 17.7-18.3.