Comets - 218P/LINEAR - 0218P
Type Periodic Perihelion Date 23 April 2015 Perihelion Distance (q) 1.2 Aphelion Distance (Q) 5.0 Period (Years)   5.4 Eccentricity (e)   0.62 Inclination (i)   2.7 Click for NASA orbit diagram
Hills Observatory: 1 January 2013 to 8 October 2018
COMETS COMETS
DEEP SKY DEEP SKY
M. Bezpalko reported the discovery of a comet on five images obtained with the 1.0-m reflector of the Lincoln Near Earth Asteroid Research (LINEAR) program (New Mexico, USA) on 2003 April 29. The magnitude was between 18.8 and 19.0, while a tail extended toward PA 270 degrees. The first confirmation was obtained by J. E. McGaha (Grasslands Observatory, Arizona, USA) on April 30. His 62-cm reflector revealed a nuclear magnitude of 18.1-18.2. Following the comet's recovery in 2009, a new orbit for the 2003 apparition revealed a perihelion date of May 14.31 and a period of 6.10 years. Several observations were made shortly after the comet's recovery. G. J. Garradd (Tamworth, New South Wales, Australia) noted the comet appeared slightly diffuse on April 30.6. McGaha said his 30-cm reflector revealed a magnitude of 17.7-17.9 and a faint coma measuring 5" by 10" which was "aligned north-south, with uniform brightness and no apparent nuclear condensation or core" on May 2.2. J. G. Ries (McDonald Observatory, Texas, USA) photographed the comet using the 76-cm reflector on May 2.3. He gave the magnitude as 17.7-18.0 and noted a tail extending 20 arc seconds toward the region slightly south of west. The comet was last detected on 2003 August. In 2009 the comet was recovered on a single image obtained by the LINEAR program on March 31. An independent recovery was obtained by Giovanni Sostero, Enrico Prosperi, Ernesto Guido, and Paul Camilleri (Remanzacco Observatory, Italy) using a remote-controlled telescope at Grove Creek Observatory (Trunkey, New South Wales, AUstralia) on 2009 April 15. They described the comet as a "diffuse coma about 15 arcsec in diameter, with a central condensation" of magnitude of 19.2. The comet was 8 arc minutes southeast of the predicted position. Date 10x10 mag Error Kphot mag Coma ' 17 Feb 15 17.07 0.10 16.0 0.2 24 Feb 15 16.81 0.03 16.4 0.2 5 Mar 15 16.60 0.15 15.8 0.2 14 Mar 15 16.40 0.06 15.7 0.2 19-Apr-15 15.78 0.08 12.9 0.3 03-May-15 15.84 0.09 13.2 0.2 12-May-15 15.03 0.04 13.5 0.3 22-May-15 15.70 0.05 13.9 0.2 10-Jun-15 16.11 0.03 14.0 0.2 19-Jul-15 16.48 0.06 13.3 0.2 08-Aug-15 16.97 0.08 15.1 0.2 15-Aug-15 17.14 0.02 15.3 0.2 21-Aug-15 17.92 0.04 16.1 0.2 15-Sep-15 19.56 0.20 18.5 0.2
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