Comets - 29P/Schwassmann-Wachmann - 0029P
Type Periodic Perihelion Date 9 April 2019 Perihelion Distance (q) 5.8 Aphelion Distance (Q) 6.3 Period (Years)   14.7 Eccentricity (e)   0.04 Inclination (i)   9.4 Click for NASA orbit diagram 
Hills Observatory: 1 January 2013 to 6 May 2018
COMETS COMETS
DEEP SKY DEEP SKY
The comet, also known as Schwassmann-Wachmann 1, was discovered on November 15, 1927, by Arnold Schwassmann and Arno Arthur Wachmann at the Hamburg Observatory in Bergedorf, Germany. It was discovered photographically, when the comet was in outburst and the magnitude was about 13. Precovery images of the comet from March 4, 1902, were found in 1931 and showed the comet at 12th magnitude. The comet is unusual in that while normally hovering at around 16th magnitude, it suddenly undergoes an outburst. This causes the comet to brighten by 1 to 4 magnitudes. This happens with a frequency of 7.3 outbursts per year, fading within a week or two. The magnitude of the comet has been known to vary from 19th magnitude to 9th magnitude, a ten thousand-fold increase in brightness, during its brightest outbursts. Highly changing surface processes are suspected to be responsible for the observed behavior. The comet is thought to be a member of a relatively new class of objects called "centaurs", of which at least 80 are known. These are small icy bodies with orbits between those of Jupiter and Neptune. Astronomers believe that centaurs are recent escapees from the Kuiper belt, a zone of small bodies orbiting in a cloud at the distant reaches of the Solar System. Frequent perturbations by Jupiter will likely accumulate and cause the comet to migrate either inward or outward by the year 4000. The dust and gas comprising the comet's nucleus is part of the same primordial materials from which the Sun and planets were formed billions of years ago. The complex carbon-rich molecules they contain may have provided some of the raw materials from which life originated on Earth. The comet nucleus is estimated to be 30.8 kilometers in diameter. Date 10x10 mag Error Kphot mag Coma ' 27 Jan 13 16.44 0.04 14.0 0.4 23 Feb 13 16.16 0.07 13.5 0.4 8 Mar 13 16.55 0.04 13.9 0.3 24 Mar 13 16.71 0.03 13.2 0.3 8 May 13 16.77 0.02 13.5 0.4 18 May 13 16.61 0.04 13.9 0.4 10 Jun 13 16.70 0.01 13.9 0.5 14 Jun 13 12.99 0.02 12.6 0.4 15 Jun 13 13.09 0.03 12.5 0.4 16 Jun 13 13.49 0.02 12.5 0.5 17 Jun 13 13.79 0.02 12.4 0.6 18 Jun 13 13.93 0.03 12.3 0.7 20 Jun 13 14.36 0.06 12.2 1.0 24 Jun 13 14.96 0.02 11.9 1.1 25 Jun 13 15.08 0.03 11.8 1.0 26 Jun 13 15.21 0.03 12.1 1.1 29 Jun 13 15.54 0.02 12.5 1.0 5 Jul 13 16.02 0.02 13.0 0.7 19 Jul 13 16.41 0.05 13.4 0.3 24 Jul 13 16.60 0.04 13.6 0.2 30 Jul 13 16.75 0.03 13.8 0.3 14 Aug 13 17.17 0.08 13.3 0.2 20 Jan 14 16.78 0.06 13.7 0.2 27 Jan 14 16.78 0.05 12.1 0.2 16 Feb 14 16.80 0.06 13.8 0.2 2 Mar 14 16.49 0.03 13.7 0.2 3 Mar 14 14.03 0.02 13.7 0.3 4 Mar 14 13.34 0.01 13.0 0.2 5 Mar 14 13.52 0.03 13.1 0.3 6 Mar 14 13.44 0.02 12.8 0.4 7 Mar 14 13.66 0.01 12.8 0.4 9 Mar 14 14.21 0.01 12.8 0.6 28 Mar 14 16.15 0.03 13.2 0.5 5 Apr 14 16.18 0.03 13.2 0.2 20 Apr 14 16.31 0.05 13.1 0.2 22 Apr 14 16.81 0.03 13.3 0.2 23 Apr 14 16.28 0.03 13.0 0.2 24 Apr 14 16.14 0.03 12.9 0.2 26 Apr 14 16.17 0.03 13.3 0.2 29 Apr 14 16.31 0.03 13.0 0.2 2 May 14 13.51 0.03 12.8 0.2 6 May 14 14.73 0.02 12.8 0.6 18 May 14 14.38 0.04 12.0 0.4 20 May 14 14.69 0.02 11.4 0.4 21 May 14 14.91 0.01 11.8 0.4 22 May 14 15.01 0.02 12.0 0.5 24 May 14 15.26 0.01 12.2 0.6 25 May 14 15.34 0.05 12.2 0.3 27 May 14 15.37 0.02 12.3 0.5 28 May 14 15.53 0.02 12.5 0.4 29 May 14 15.63 0.02 12.6 0.2 2 Jun 14 15.81 0.02 12.7 0.4 3 Jun 14 15.85 0.08 12.8 0.2 4 Jun 14 15.51 0.03 12.0 0.2 5 Jun 14 15.56 0.02 12.4 0.2 6 Jun 14 15.69 0.03 11.9 0.2 8 Jun 14 15.87 0.03 12.8 0.3 15 Jun 14 16.35 0.05 13.1 0.2 18 Jun 14 16.05 0.02 12.5 0.4 19 Jun 14 16.13 0.02 12.6 0.3 20 Jun 14 16.16 0.01 12.9 0.2 25 Jun 14 16.35 0.02 12.8 0.3 26 Jun 14 16.45 0.04 13.0 0.3 28 Jun 14 16.44 0.05 13.1 0.2 1 Jul 14 16.34 0.02 13.4 0.2 2 Jul 14 16.42 0.02 12.9 0.2 3 Jul 14 16.37 0.02 13.0 0.2 16 Jul 14 16.39 0.02 13.7 0.2 17 Jul 14 16.43 0.02 13.2 0.2 18 Jul 14 16.38 0.06 13.5 0.2 24 Jul 14 16.49 0.04 13.1 0.2 26 Jul 14 16.52 0.04 13.2 0.2 28 Jul 14 16.56 0.05 n/a n/a 3 Aug 14 16.29 0.03 13.8 0.2 13 Aug 14 16.64 0.04 14.0 0.2 17 Aug 14 16.41 0.03 13.7 0.2 19 Aug 14 16.50 0.02 13.3 0.2 24 Aug 14 16.71 0.02 13.3 0.2 26 Aug 14 16.74 0.03 13.5 0.2 30 Aug 14 16.21 0.03 14.2 0.2 5 Sep 14 16.63 0.06 13.7 0.2 9 Sep 14 16.74 0.19 n/a n/a 13 Sep 14 15.83 0.04 14.2 0.2 17 Sep 14 16.24 0.02 14.7 0.2 19 Sep 14 16.39 0.01 13.8 0.3 21 Sep 14 16.51 0.03 14.6 0.2 26 Sep 14 15.56 0.01 14.0 0.3 30 Sep 14 16.11 0.08 14.6 0.2 2 Oct 14 13.46 0.01 13.0 0.3 4 Oct 14 14.06 0.01 12.8 0.5 8 Oct 14 14.71 0.03 12.3 0.6 9 Oct 14 15.23 0.03 12.6 0.7 10 Oct 14 15.23 0.02 12.2 0.8 14 Oct 14 15.60 0.02 12.5 0.6 16 Oct 14 15.72 0.01 12.7 0.3 20 Oct 14 14.31 0.02 12.4 0.2 21 Jan 15 16.95 0.15 16.5 0.2 30 Jan 15 16.75 0.17 16.3 0.2 2 Feb 15 14.76 0.14 14.6 0.2 4 Feb 15 13.76 0.05 13.6 0.2 16 Feb 15 15.79 0.02 12.7 0.6 17 Feb 15 15.69 0.09 12.6 0.7 20 Feb 15 16.01 0.03 13.0 0.7 22 Feb 15 15.91 0.10 12.9 0.5 23 Feb 15 16.24 0.02 13.0 0.4 24 Feb 15 16.02 0.01 13.1 0.4 1 Mar 15 15.03 0.02 13.6 0.3 14-May-15 13.85 0.01 10.7 0.5 16-May-15 14.16 0.02 11.0 0.5 22-May-15 14.67 0.02 11.6 1.1 27-May-15 15.13 0.04 12.1 1.0 07-Jun-15 15.54 0.08 12.5 1.2 10-Jun-15 15.75 0.01 12.8 0.5 11-Jun-15 15.71 0.05 12.7 0.3 13-Jun-15 15.73 0.07 12.8 0.3 27-Jun-15 16.08 0.04 13.2 0.2 03-Sep-15 16.21 0.01 15.8 0.2 01-Oct-15 13.80 0.02 11.9 0.4 15-Mar-16 14.59 0.02 13.5 0.2 06-May-16 15.66 0.02 12.6 0.2 31-May-16 16.14 0.04 13.1 0.2 04-Jun-16 16.00 0.01 13.4 0.2 07-Jun-16 14.35 0.01 13.6 0.4 14-Jun-16 15.24 0.02 12.6 0.8 27-Jun-16 15.78 0.01 12.6 0.5 08-Jul-16 14.99 0.03 11.9 0.3 14-Jul-16 15.30 0.02 12.2 0.6 22-Aug-16 16.01 0.04 13.1 0.2 22-Aug-16 14.75 0.01 12.7 0.3 23-Aug-16 14.80 0.01 13.2 0.7 25-Aug-16 14.99 0.03 11.7 0.7 26-Aug-16 15.15 0.03 12.0 0.7 30-Aug-16 15.10 0.02 11.9 0.7 31-Aug-16 15.31 0.01 12.2 0.8 01-Sep-16 15.51 0.01 12.4 0.8 02-Sep-16 15.68 0.01 12.3 0.5 17-Sep-16 16.12 0.02 13.1 0.2 18-Sep-16 15.78 0.01 13.3 0.2 19-Sep-16 15.87 0.01 13.1 0.3 21-Sep-16 15.95 0.01 12.7 0.5 22-Sep-16 16.16 0.02 13.0 0.4 23-Sep-16 16.00 0.03 13.1 0.4 27-Sep-16 16.28 0.01 13.1 0.4 30-Sep-16 16.48 0.02 12.9 0.4 01-Oct-16 16.60 0.02 13.6 0.3 06-Oct-16 16.32 0.07 13.3 0.2 28-Oct-16 13.67 0.01 12.1 0.6 30-Oct-16 14.21 0.02 11.7 1.0 31-Oct-16 14.38 0.02 11.7 1.1 01-Nov-16 14.61 0.03 11.7 1.1 24-Nov-16 16.20 0.02 13.2 1.9 29-Mar-17 15.95 0.08 13.3 2.5 02-Apr-17 16.22 0.04 13.2 2.0 06-Apr-17 16.20 0.06 13.6 1.7 13-Apr-17 16.57 0.08 13.6 0.8 23-Apr-17 16.31 0.04 13.3 1.2 24-Apr-17 13.35 0.03 12.2 0.6 24-Apr-17 13.35 0.03 12.2 0.5 25-Apr-17 13.46 0.01 12.7 0.5 03-May-17 15.11 0.03 12.0 1.2 05-May-17 15.34 0.02 12.3 1.0 06-May-17 15.45 0.04 12.4 1.4 07-May-17 15.45 0.04 12.4 1.2 08-May-17 15.50 0.03 12.4 1.0 22-May-17 15.72 0.02 12.5 1.8 26-May-17 15.97 0.02 12.9 2.5 27-May-17 16.03 0.02 13.0 2.6 28-May-17 15.90 0.01 12.9 1.8 30-May-17 15.60 0.07 12.4 1.6 21-Jun-17 16.12 0.01 13.1 1.9 22-Jun-17 15.98 0.03 12.8 0.8 23-Jun-17 15.54 0.03 12.6 0.7 26-Jun-17 15.82 0.02 12.0 2.5 27-Jun-17 15.91 0.03 12.8 4.1 29-Jun-17 14.99 0.02 12.1 3.6 03-Jul-17 13.77 0.01 13.0 2.6 04-Jul-17 13.97 0.01 13.0 1.8 17-Jul-17 15.53 0.04 12.5 2.0 18-Jul-17 15.66 0.01 12.7 2.0 19-Jul-17 15.70 0.01 12.7 2.7 21-Jul-17 15.74 0.02 12.7 2.7 27-Jul-17 17.53 0.13 16.2 0.2 24-Jul-17 15.66 0.08 12.6 2.8 25-Jul-17 15.81 0.04 12.8 2.5 26-Jul-17 15.65 0.02 12.7 2.5 27-Jul-17 15.62 0.02 12.4 2.7 13-Aug-17 15.74 0.01 12.4 1.8 15-Aug-17 15.71 0.02 12.6 1.9 17-Aug-17 15.77 0.01 12.7 2.1 19-Aug-17 15.68 0.03 12.6 3.1 20-Aug-17 15.46 0.06 12.3 2.6 22-Aug-17 15.92 0.02 12.5 1.2 23-Aug-17 13.70 0.01 13.1 1.6 24-Aug-17 13.76 0.01 12.9 1.4 26-Aug-17 14.04 0.01 13.1 1.0 26-Aug-17 14.37 0.02 13.0 1.1 28-Aug-17 12.31 0.01 11.5 2.2 08-Sep-17 14.35 0.01 11.3 1.8 13-Sep-17 14.99 0.01 11.9 2.8 15-Sep-17 15.15 0.03 12.0 3.1 17-Sep-17 15.00 0.01 12.0 2.7 17-Sep-17 15.02 0.01 12.0 3.0 21-Sep-17 15.08 0.02 12.1 3.4 25-Sep-17 15.54 0.01 12.6 3.1 26-Sep-17 15.68 0.03 12.7 2.9 27-Sep-17 15.70 0.01 12.7 2.9 28-Sep-17 15.75 0.04 12.7 2.5 05-Oct-17 15.75 0.02 12.8 3.4 06-Oct-17 15.83 0.03 12.8 3.3 07-Oct-17 15.92 0.02 13.0 3.3 10-Oct-17 16.09 0.01 13.2 3.6 11-Oct-17 16.09 0.01 13.2 3.4 17-Oct-17 16.24 0.01 13.3 3.1 18-Oct-17 16.26 0.01 13.3 2.4 23-Oct-17 16.43 0.03 13.4 0.8 25-Oct-17 16.26 0.01 13.3 0.8 03-Nov-17 16.10 0.02 12.7 0.5 04-Nov-17 16.10 0.03 12.9 0.6 10-Nov-17 16.29 0.02 13.4 0.7 12-Nov-17 16.45 0.03 13.5 0.5 20-Nov-17 16.44 0.02 13.4 0.8 23-Nov-17 16.56 0.02 13.4 0.5 16-Dec-17 15.45 0.03 12.7 1.0 19-Dec-17 15.87 0.03 12.7 1.5 20-Dec-17 15.50 0.12 12.4 1.4 25-Dec-17 15.38 0.02 12.6 1.7 29-Dec-17 15.71 0.04 12.6 1.1 31-Dec-17 15.73 0.04 12.6 1.2 02-Jan-18 15.95 0.04 12.9 1.2 03-Jan-18 15.97 0.03 12.9 0.8 05-Jan-18 15.96 0.09 12.8 1.0 06-Jan-18 15.46 0.02 12.3 1.3