Comets - 131P/Mueller - 0131P
Type Periodic Perihelion Date 24 January 2019 Perihelion Distance (q) 2.4 Aphelion Distance (Q) 4.9 Period (Years)   7.1 Eccentricity (e)   0.34 Inclination (i)   7.4 Click for NASA orbit diagram
Hills Observatory: 1 January 2013 to 19 January 2019
During the course of the second Palomar Sky Survey, Jean Mueller found this comet on a plate obtained on 15 September 1990 . The image was obtained with the 1.2-m Oschin Schmidt Telescope. Mueller estimated the magnitude as 17 and said a tail was visible to the south- southwest.  The comet brightened to about 16 by late September and early October as it approached both the Sun and Earth, but slowly faded thereafter. It was last detected on 9 February 1991. The comet was independently recovered by two Japanese astronomers during 1997.  A. Sugie (Dynic Astronomical Observatory) used a 0.60-m f/4.0 reflector and a CCD camera to image the comet on 29 June, while A. Nakamura (Kuma Kogen) used a 0.60-m f/6.0 Ritchey-Chretien and a CCD camera to image the comet on 5 July. Sugie gave the magnitude as 18.9, while Nakamura said it was 19.9. The latter astronomer added that a weakly condensed coma was 15 arc seconds across, and a possible faint tail extended toward PA 260 degrees. Date 10x10 mag Error Kphot mag Coma ' 31-Dec-18   19.86   0.04 19.4 0.2