* * * * * C/2001 HT50 (LINEAR-NEAT) * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2004 1 11.88 S 12.2 TK 20.3T 100 1.5 3 GON Sierra del Aramo, Asturias 2004 1 11.72 S 12.5:HS 20.3L 63 1.2 3 GUZ Krosno (At the limit of visibility.) 2003 12 25.79 S 12.1 TJ 20.3L 63 1.5 3 GUZ Krosno 2003 12 24.67 S 12.0 TJ 20.3L 63 1.5 4 GUZ Krosno (Easily visible, however fainter than previously.) 2003 12 19.75 S 11.9 AC 40.6L 72 1.5 3 RES Szamotuly 2003 12 18.81 S 12.0 AC 40.6L 72 1.0 3 RES Szamotuly 2003 12 18.787 S 11.9 TK 31.0J 89 2.0 3 DIJ Sint Annen 2003 12 18.783 S 12.2 TK 31.0J 89 1.5 3/ BOU Sint Annen 2003 12 17.810 S 11.9 TK 25.4J 88 2.5 0/ DIJ Sint Annen 2003 12 17.808 S 12.0 TK 25.4J 88 1.5 3/ BOU Sint Annen 2003 12 16.92 S 11.8 TK 20.3T 100 1.5 4 GON Villasecino, Leon 2003 12 16.71 S 11.7 AC 13.0L 45 1 3 RES Ostrorog 2003 12 16.48 S 12.7 GA 25.4L 71 SEA Cowra, NSW 2003 12 15.72 S 11.7 AC 13.0L 45 1 3/ RES Ostrorog 2003 12 14.75 S 11.6 AC 13.0L 45 1 3 RES Ostrorog 2003 11 28.869 S 11.8 TK 31.0J 89 1.3 4 DIJ Sint Annen 2003 11 28.867 M 11.9 TK 31.0J 89 1.7 4/ BOU Sint Annen 2003 11 28.74 S 11.8 TK 20.3L 63 1.5 3 GUZ Krosno 2003 11 15.818 S 11.5 TK 25.4J 72 2.5 4 BOU Sint Annen 2003 11 6.149 S 11.5 TK 31.0J 109 2.0 4/ BOU Sint Annen 2003 10 27.96 S 11.3 TK 20.3L 63 2 4 GUZ Krosno (Easy, moderately condensed object.) 2003 10 27.897 M 11.5 TK 31.0J 72 2.5 5/ BOU Sint Annen 2003 10 27.894 S 11.4 TK 31.0J 72 1.5 2 DIJ Sint Annen 2003 10 26.921 M 11.5 TK 31.0J 89 1.8 5/ BOU Sint Annen 2003 10 26.02 S 11.7 TK 20.3T 77 1.0 4 GRA Fjellhamar (Faint, but definitely seen at correct position. NEL = 6.0.) 2003 10 25.128 M 11.7 TK 31.0J 72 2.0 6 BOU Sint Annen (Some interference from magnitude 12.4 star [TK] near edge of coma.) 2003 10 24.83 S 11.5 TK 20.3L 63 2 4 GUZ Krosno 2003 10 23.902 S 12.0 TK 31.0J 72 2.1 5/ DIJ Sint Annen 2003 10 23.900 M 11.6 TK 31.0J 72 2.0 5/ BOU Sint Annen (Comet appears more condensed than 2 days ago. At 109x a nearly stellar central condensation of magnitude ~13 is clearly visible.) 2003 10 21.888 S 11.5 TK 25.4J 72 2.0 3/ BOU Sint Annen 2003 10 19.85 M 11.6 TK 20.3L 63 2 4 GUZ Krosno 2003 10 18.96 S 11.9 HS 40.7L 116 2.0 4 BIV Les Sièges 2003 10 18.885 S 11.5 TK 31.0J 89 2.3 2 DIJ Lauwersoog 2003 10 18.882 S 11.5 TK 31.0J 89 2.2 3/ BOU Lauwersoog 2003 10 18.85 S 11.7 TK 20.3L 63 2 3 GUZ Krosno 2003 10 8.138 M 12.0 SK 25.4J 88 2.0 4 DIJ Sint Annen 2003 10 8.135 M 11.8 SK 25.4J 88 1.8 4 BOU Sint Annen (Slight interference from nearby star of magnitude 10.8 [TK].) 2003 10 5.04 S 11.8 TK 20.3T 77 1.4 4 GRA Fjellhamar 2003 9 26.115 M 12.1 TK 31.0J 89 1.9 4 BOU Sint Annen 2003 9 25.96 S 11.8 TK 20.3L 63 2 3 GUZ Krosno 2003 9 25.15 S 12.1 TK 20.3T 133 1.5 2 GON Alto del Castro - Aralla, Leon 2003 9 21.96 S 11.9 TK 20.3L 63 2 4 GUZ Krosno 2003 9 7.04 S 11.8 TK 20.3L 63 1.2 3 GUZ Krosno (Quite diffuse.) 2003 9 4.090 S 12.6 TK 31.0J 109 1.1 3 BOU Sint Annen 2003 9 2.100 S 12.7 TK 31.0J 109 0.9 2 DIJ Noorddijk 2003 9 2.097 S 12.6 TK 31.0J 109 1.0 3 BOU Noorddijk 2003 8 27.17 S 12.5 HS 20.3T 206 1 2 GON Alto del Castro - Aralla, Leon (Astronomical twilight.) 2003 8 26.06 S 11.9 TK 20.3L 63 1.2 3 GUZ Krosno (Quite diffuse.) 2003 3 31.88 S 12.9 HS 25.6L 42 0.9 6 BIV Ablis 2003 3 30.46 S 12.6:GA 25.4L 71 SEA Cowra, NSW (Low contrast due to glow from Cowra town centre. Comet appeared very faint due to the light sky.) 2003 3 30.838 S 12.1 TK 31.0J 109 1.4 1/ DIJ Sint Annen 2003 3 30.834 S 12.2 TK 31.0J 109 1.4 3 BOU Sint Annen (Faint, diffuse object. Some interference from nearby magn. 8.2 [TK] star.) 2003 3 26.76 S 11.9 HS 20.3L 63 1.5 3 GUZ Krosno 2003 3 24.88 S 12.7 HS 25.6L 84 0.6 5 BIV Ablis 2003 3 24.76 S 11.9 HS 20.3L 63 1.5 3 GUZ Krosno 2003 3 23.827 S 12.2 TK 25.4J 115 1.0 3 BOU Westerdijkshorn 2003 3 22.88 S 12.0 HS 20.3L 63 1.5 3 GUZ Krosno (Again only 10' away from Betelgeuse) 2003 3 22.842 S 12.4:TK 31.0J 143 1.2 2/ DIJ Lauwersoog 2003 3 22.838 S 12.0:TK 31.0J 143 1.1 4 BOU Lauwersoog (Comet only 10' from alpha Ori. About 1' from, and approaching star of magn. 12.5 [HS].) 2003 3 21.77 S 11.9 HS 20.3L 63 1.5 4 GUZ Krosno (Only 9' away from Betelgeuse.) 2003 3 20.79 S 11.9 HS 20.3L 63 1.5 4 GUZ Krosno 2003 3 6.95 S 12.4 HS 25.6L 84 1.3 5 BIV Poigny-la-Foret 2003 3 2.82 S 11.6 AC 41.0L 72 1.5 3/ RES Szamotuly 2003 3 1.80 S 11.8 AC 41.0L 72 1.5 3 RES Szamotuly 2003 2 26.792 S 11.8 TK 25.4J 88 1.3 3/ BOU Bedum 2003 2 26.75 S 11.7 HS 20.3L 63 1.8 4 GUZ Krosno 2003 2 25.80 S 12.0 AC 41.0L 72 1.6 2/ RES Szamotuly 2003 2 25.799 S 11.9 TK 25.4J 88 1.7 1/ DIJ Bedum 2003 2 25.794 S 11.9 TK 25.4J 88 1.2 s4 BOU Bedum (Faint stellar condensation of 13th magnitude visible.) 2003 2 25.74 S 11.7 HS 20.3L 63 1.5 4 GUZ Krosno 2003 2 24.82 S 12.0 AC 41.0L 72 1.8 2 RES Szamotuly 2003 2 23.86 S 12.1 AC 41.0L 72 1.5 2/ RES Szamotuly 2003 2 23.805 S 11.5 TK 31.0J 109 1.2 3 DIJ Westerdijkshorn 2003 2 23.799 S 11.8 TK 31.0J 109 1.2 4 BOU Westerdijkshorn (Some interference from magn. 6.3 [TK] star only 5' away.) 2003 2 23.74 S 11.5 HS 20.3L 63 1.5 4 GUZ Krosno (Quite bright, easy to see object.) 2003 2 22.86 S 11.8 AC 41.0L 72 1.7 3 RES Szamotuly 2003 2 22.818 S 11.7 TK 25.4J 88 1.4 1 DIJ Westerdijkshorn 2003 2 22.812 S 11.6 TK 25.4J 88 1.4 3/ BOU Westerdijkshorn 2003 2 22.73 S 11.6 HS 20.3L 63 1.5 5 GUZ Krosno 2003 2 21.88 S 11.5 HS 20.3L 63 1.5 5 GUZ Krosno 2003 2 21.86 S 12.5 HS 25.6L 84 1.0 5 BIV Poigny-la-Foret 2003 2 21.820 S 11.7 TK 25.4J 88 1.5 2 DIJ Sint Annen 2003 2 21.816 S 11.9 TK 25.4J 88 1.2 4 BOU Sint Annen 2003 2 20.87 S 12.0 TJ 20.3T 77 1 5 GON Sierra del Aramo, Asturias 2003 2 20.800 S 12.0 TK 25.4J 88 1.4 4 BOU Sint Annen (Comet rather inconspicuous; some interference from nearby star of magn. 12.8 [HS].) 2003 2 5.86 S 12.0 TK 25.6L 84 1.3 5 BIV Poigny-la-Foret 2003 2 2.80 S 11.4 HS 20.3L 63 1.5 4 GUZ Krosno (Comet was really easy object, brighter than previously.) 2003 1 31.94 S 11.5 AC 41.0L 121 1.8 3/ RES Szamotuly 2003 1 31.927 S 11.3 TK 31.0J 89 1.3 3/ DIJ Sint Annen 2003 1 31.924 M 11.8 TK 31.0J 89 1.7 s5 BOU Sint Annen (Virtually stellar condensation of 13th magnitude visible.) 2003 1 31.47 S 11.8 GA 25.4L 114 0.8 5 SEA Cowra, NSW 2003 1 28.50 S 11.9 GA 25.4L 71 0.5 SEA Cowra, NSW (Comet was difficult in a hazy sky.) 2003 1 27.99 S 11.8 HS 20.3T 133 1 3 GON Camposagrado, Leon 2003 1 27.88 S 11.9 TK 25.6L 84 1.4 3 BIV Poigny-la-Foret 2003 1 25.936 S 11.7 TK 31.0J 89 1.3 3/ DIJ Sint Annen 2003 1 25.931 S 11.9 TK 31.0J 89 1.5 4 BOU Sint Annen 2003 1 24.88 S 12.1 HS 25.6L 84 1.3 5 BIV Poigny-la-Foret 2003 1 23.99 S 11.7 HS 20.3T 77 1 3 GON Asturias (Moonlight.) 2003 1 12.21 S 12.0 HS 25.6L 42 1.3 5 BIV Ablis 2003 1 7.53 S 11.9 GA 25.4L 71 2 SEA Cowra 2003 1 7.05 S 11.7 TK 20.3T 77 2.0 6 BIV Pico-Veleta, Spain 2003 1 5.58 S 12.0 TK 20.0L 67 1.2 5 MAT Wallaroo, SA 2003 1 5.029 M 11.7 TK 25.4J 88 1.0 3 DIJ Sint Annen 2003 1 5.023 M 11.8 TK 25.4J 88 1.4 4/ BOU Sint Annen 2003 1 3.95 S 12.3 HS 20.3T 77 1 4 GON Sierra del Aramo, Asturias 2003 1 3.58 S 12.1 TK 30.0L 83 1 6 MAT Wallaroo, SA 2003 1 1.62 S 12.5 GA 28.0T 133 1 6 MAT Wallaroo, SA 2002 12 26.93 S 12.0 HS 20.3L 63 1 5 GUZ Krosno 2002 12 14.05 S 12.2 HS 20.3L 63 1 5 GUZ Krosno 2002 12 13.02 S 12.1 HS 20.3L 63 1.2 5 GUZ Krosno 2002 12 12.02 S 12.2 AC 41.0L 121 1.8 3 RES Szamotuly 2002 12 11.66 S 12.6 GA 25.4L 71 1 SEA Cowra, NSW 2002 12 3.62 S 13.5:HS 28.0T 196 0.8 5 MAT Roxby Downs, SA (Low elevation, haze.) 2002 11 7.15 S[13.0 HS 20.3L 63 ! 1 GUZ Krosno 2002 10 19.15 S[12.5 HS 20.3L 63 ! 1 GUZ Krosno 2002 5 3.85 S 13.2 AC 41.0L 121 0.8 4 RES Szamotuly 2002 4 3.86 S 13.3 AC 41.0L 121 0.8 3/ RES Szamotuly 2002 3 19.99 S 13.6 AC 41.0L 262 0.7 4/ RES Szamotuly (2 hours clear or partial clear sky. Last night's object moving. Much better conditions than yesterday. MPC elements [taken from ICQ Page ephemeris].) 2002 3 18.88 S 13.7 AC 41.0L 262 0.6 3 RES Szamotuly (Confirmation by other observers needed! Conditions above southern horizon were not the best. But faint diffuse object at correct position [taken from ICQ Page ephemeris].)