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* * * * * 52P/Harrington-Abell * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2014 2 2.921 S 14.0 AQ 30.5T 139 0.5 6/ DIJ Burlage 2014 2 2.917 S 14.0 AQ 30.5T 139 0.5 4 BOU Burlage, Germany 2014 1 28.844 S 14.1 TA 30.5T 139 0.4 4/ DIJ Burlage 2014 1 28.841 S 14.2 TA 30.5T 139 0.5 4 BOU Burlage, Germany
1999 5 15.901 S 13.2 HS 40.0L 133 1.2 0/ BOU Lattrop 1999 4 18.906 S 13.1 AC 25.4J 100 1.2 0/ BOU Lauwersoog 1999 4 17.912 S 12.8 AC 25.4J 100 1.5 0 BOU Sint Annen 1999 3 14.922 S 12.3 AC 25.4J 100 1.6 0/ BOU Sint Annen 1999 2 13.808 S 11.6 TT 25.4J 72 1.8 1 BOU Sint Annen 1999 2 12.784 S 11.5 TT 25.4J 88 1.8 1/ BOU Sint Annen 1999 2 8.803 S 11.3 TT 25.4J 72 2.0 2 BOU Sint Annen 1999 2 5.790 S 11.1 TT 25.4J 72 2.2 4 BOU Sint Annen 1999 1 18.010 S 10.9 TT 25.4J 72 2.5 2/ BOU Sint Annen 1999 1 10.840 S 10.9 TT 25.4J 72 2.4 4 BOU Sint Annen 1999 1 9.805 S 10.9 TT 25.4J 58 2.4 3 BOU Sint Annen 1998 12 31.228 S 11.1 TT 25.4J 72 2.2 3/ BOU Sint Annen 1998 12 29.200 S 11.2 TT 25.4J 72 2.3 3 BOU Sint Annen 1998 12 21.194 S 11.3 TT 25.4J 72 2.2 3/ BOU Sint Annen 1998 12 20.199 S 11.4 TT 25.4J 72 2.0 3/ BOU Sint Annen (Some interference from star of magn. 10.4.) 1998 12 17.842 M 11.3 TT 25.5J 72 2.2 4 BOU Sint Annen 1998 12 16.184 M 11.5 GA 25.4J 72 2.0 4/ BOU Sint Annen 1998 12 7.811 S 11.5 TT 25.4J 100 1.8 3/ BOU Lauwersoog (Comet close to star of magn. 12.5.) 1998 11 20.955 S 12.2 GA 25.4J 88 1.6 1/ BOU Sint Annen 1998 10 26.999 S 12.5 AC 25.4J 88 1.5 1/ BOU Sint Annen 1998 10 15.016 S 13.0 GA 25.4J 100 1.3 2 BOU Sint Annen 1998 8 31.015 S 12.3 GA 25.4J 100 1.6 0/ BOU Sint Annen 1998 7 25.020 S 11.4 TT 25.4J 100 1.2 3 BOU Sint Annen (Comet only at 17° altitude, but fairly easily visible. Very close to magn. 13 star.) 1998 7 22.040 S 11.8 TJ 25.4J 100 1.2 4 BOU Sint Annen (Comet in outburst. Difficult observation; comet only 19-20 deg. above horizon. Interference from twilight [Sun at -15°] and rather bright NLC very low over the Northern horizon.)