* * * * * C/2003 T4 (LINEAR) * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2005 5 12.81 S 8.4 TK 10.0B 25 3 6 MAT Stockport Observatory, SA 2005 5 9.78 S 8.0 AA 10.0B 25 SEA The Entrance, NSW 2005 4 17.77 S 8.1 AA 5.0B 10 SEA The Entrance, NSW 2005 4 13.75 S 8.1 AA 10.0B 25 0.27 245 SEA Cowra, NSW (Comet appeared fainter and tail less prominent than previous observation, although this may have been due to proximity of several stars.) 2005 4 11.77 B 7.8 AA 10.0B 25 3 0.46 235 SEA Cowra, NSW (Broad tail which appeared to emerge mainly from N side of coma and spiral south. In 24.4L at 71x, morphology of comet reminded me a little of Hale-Bopp in mid April 1997, with brightest part of tail emerging from N of coma somewhat in the shape of the number "6". Coma and broad tail gave suggestion of a parabolic envelope, like a large dust comet in miniature, but with the CC being "softer" than the more usual sharp stellar or planetary appearance of these comets.) 2005 4 8.81 S 7.7 TK 10.0B 25 4 5 MAT Stockport Observatory, SA (In 38.0-cm reflector, ion tail >30' in p.a. 240 deg., dust tail 15' long fanning out towards p.a. 315 deg.) 2005 3 20.19 S 8.4 TK 25.6L 42 3.5 6 BIV Poigny-la-Forêt 2005 3 20.167 M 8.2 TK 15.6L 29 3.5 5/ BOU Garmerwolde 2005 3 19.12 S 7.8:TK 20.3T 83 3 4 GRA Fjellhamar (Comet only barely visible, but detected at correct location. Altitude 8.5 deg. Twilight [Sun 12 deg. below horizon].) 2005 3 18.20 S 8.2 TK 10.0B 25 4 5 GON Sierra del Aramo, Asturias 2005 3 18.19 S 8.5 TK 20.3T 77 4 5 0.1 290 GON Sierra del Aramo, Asturias 2005 3 15.20 B 8.2 TK 5.0B 7 3 7 BIV Poigny-la-Forêt 2005 3 15.20 S 8.4 TK 25.6L 42 3.0 7 BIV Poigny-la-Forêt 2005 3 13.78 S 8.1 AA 10.0B 25 SEA The Entrance, NSW (Appeared unchanged, or possibly a little fainter, through Swan band filter.) 2005 3 13.21 S 7.9:TK 5.0B 7 3 5 BIV Versailles 2005 3 13.21 S 8.5 TK 25.6L 42 2.5 7 BIV Versailles 2005 3 13.181 M 8.3 TK 15.6L 29 3.5 BOU Garmerwolde (Estimate corrected for presence of magn. 10.2 star in coma. At 45x, faint tail visible, 8' long in p.a. 278 deg.) 2005 3 10.22 S 8.4 TK 5.0B 7 3 6 GON Camposagrado, León 2005 3 10.20 S 8.6 TK 10.0B 25 3 5 0.15 290 GON Camposagrado, León 2005 3 10.182 M 8.3 TK 15.6L 36 3.5 6 BOU Garmerwolde 2005 3 8.82 S 7.8 TJ 40.0L 36 6 5/ YOS Ibaraki, Japan (Very surprised! It became unexpectedly bright and large within last one month. Now it seems much brighter than the ephemeris. It looks widely diffused at a glance, however, I found the central part is somewhat strongly and sharply condensed with a large telescope. Reinder J. Bouma pointed out that the slow brightening is similar to C/1999 S4 or C/2002 O7. The current rapid brightening may be a sign of something?) 2005 2 20.20 M 8.8 TK 20.3T 83 4 5 GRA Fjellhamar 2005 2 20.20 M 8.7 TK 10.0R 30 4.5 4/ GRA Fjellhamar (Faintly visible in 10.0-cm R, but clearly seen with the larger instrument. With 20.3-cmT the inner part of the coma was quite bright, while its outer boundary was faint and diffuse. Observed in moonlight and astronomical twilight, NEL = 5.0 [approx.].) 2005 2 14.188 M 9.9 TK 25.4J 72 1.8 4/ BOU Sint Annen 2005 2 5.80 S 10.3 TJ 40.0L 75 1.9 4/ YOS Ibaraki, Japan (Becoming brighter and larger. Moderately condensed.) 2005 1 17.23 S 10.9 TK 20.3T 100 2.0 3 GON Sierra del Aramo, Asturias 2005 1 12.760 S 10.8 TK 31.0J 72 1.5 4 BOU Sint Annen 2005 1 8.82 S 10.8 TJ 40.0L 144 1.2 5 YOS Ibaraki, Japan (Now it is very bright, moderately condensed.) 2005 1 7.78 S 11.1 TK 20.3T 77 2 2 GON Aralla, León 2005 1 2.77 S 10.9 TK 25.6L 42 2.5 3 BIV Poigny-la-Forêt 2005 1 2.753 S 11.0 TK 31.0J 89 1.8 2/ DIJ Langelo 2005 1 2.746 S 11.2 TK 31.0J 89 1.8 2/ BOU Langelo 2004 12 12.81 S 11.6 TK 20.3L 40 1.5 4 BIV Haute Provence Obs. 2004 12 12.81 S 11.9 TK 20.3T 160 1.5 3 GON Sierra del Aramo, Asturias 2004 12 12.15 S 11.6 TK 20.3L 40 1.8 4 BIV Haute Provence Obs. 2004 12 11.40 S 11.5 TJ 40.0L 144 1.5 4 YOS Gunma, Japan (Bright, but not so strongly condensed.) 2004 12 8.88 S 11.4 TK 25.6L 84 1.5 4 BIV Poigny-la-Forêt 2004 12 8.785 S 11.7 TK 31.0J 109 1.7 2 DIJ Sint Annen 2004 12 8.781 S 11.5 TK 31.0J 109 1.5 3/ BOU Sint Annen 2004 12 5.85 S 11.9 TK 20.3T 77 1.5 3 GON Camposagrado, León 2004 12 3.747 S 11.8 TA 31.0J 89 1.7 3 BOU Sint Annen 2004 11 24.221 S 11.9 TA 31.0J 109 1.0 3 DIJ Sint Annen 2004 11 24.217 S 11.8 TA 31.0J 109 1.5 4 BOU Sint Annen (Comet close to stars of magn. 12.1 and 13.1.) 2004 11 21.18 M 11.8 TA 25.4L 59 2.0 4 GRA Hågår Observatory, Eina (A fairly easy object. Magnitude reference was TASS-IV V-magnitudes of nearby and not too red reference stars. NEL = 6.5 [approx.].) 2004 11 17.779 S 12.9 TK 30.0T 152 0.5 2 LOO Le Castellard, France 2004 11 15.89 S 12.3 TK 20.3T 100 1.5 3 GON Camposagrado, León 2004 11 15.778 S 13.0 TK 30.0T 152 0.5 2 LOO Le Castellard, France 2004 11 14.89 S 12.6 HS 25.6L 84 1.3 4 BIV Poigny-la-Forêt 2004 11 14.759 S 12.0 HN 31.0J 89 1.6 3 BOU Sint Annen 2004 11 9.82 S 12.7 HS 40.0L 144 1.0 3 YOS Gunma, Japan 2004 11 8.967 S 12.4 SK 25.4J 88 1.4 3/ BOU Sint Annen 2004 11 4.832 S 12.4 HN 25.4J 88 1.5 3 BOU Sint Annen 2004 10 21.948 S 12.7 SK 31.0J 109 1.2 3/ BOU Sint Annen 2004 10 21.20 S 13.1 HS 25.6L 169 1.0 4 BIV Poigny-la-Forêt 2004 10 19.822 S 12.8 HN 31.0J 89 1.2 3/ BOU Sint Annen 2004 10 18.84 S 13.2 HS 40.7L 116 1.0 4 BIV Poigny-la-Forêt 2004 10 15.76 S 13.7:HS 40.0L 144 0.8 5 YOS Gunma, Japan 2004 10 12.91 S 13.1:HS 25.6L 169 1 4 BIV Poigny-la-Forêt 2004 10 12.806 S 13.1 SK 31.0J 109 1.0 3/ BOU Sint Annen 2004 10 12.801 S 13.2 SK 31.0J 109 1 3 DIJ Sint Annen 2004 10 11.806 S 13.1 SK 25.4J 115 1.1 3/ BOU Sint Annen 2004 10 10.855 S 13.0 SK 31.0J 109 0.9 4 DIJ Sint Annen 2004 10 10.851 S 13.1 SK 31.0J 109 1.1 3/ BOU Sint Annen 2004 10 8.861 S 13.3 SK 31.0J 109 0.6 4 DIJ Sint Annen 2004 10 8.860 S 13.0 SK 31.0J 109 0.9 4 BOU Sint Annen 2004 10 6.84 S 13.4 HS 25.6L 169 1.0 4 BIV Poigny-la-Forêt 2004 10 6.83 S 13.1 HS 25.6L 84 1.3 4 BIV Poigny-la-Forêt 2004 9 24.18 S 13.5 HS 25.6L 169 1.0 5 BIV Poigny-la-Forêt 2004 9 19.882 S 13.3 HN 25.4J 115 1 3 DIJ Sint Annen 2004 9 19.879 S 13.6 HN 25.4J 115 0.7 3 BOU Sint Annen 2004 9 17.15 S 13.4 HS 40.7L 116 1.0 4 BIV Ablis 2004 9 15.17 S 13.8 HS 25.6L 169 0.9 5 BIV Poigny-la-Forêt 2004 9 8.882 S 13.9:HN 31.0J 109 0.7 4 DIJ Sint Annen 2004 9 8.881 S 13.7:HN 31.0J 109 0.7 4 BOU Sint Annen (Difficult observation. Slight motion suspected after about 30m.) 2004 9 8.87 S 13.6 HS 40.7L 116 1.0 4 BIV Ablis 2004 8 19.944 S 14.4 HS 31.0J 143 0.5 3/ DIJ Sint Annen 2004 8 19.942 S 14.1 HS 31.0J 143 0.5 4/ BOU Sint Annen 2004 8 16.01 S 14.3 HS 40.7L 116 0.8 4 BIV Valdrome 2004 8 14.93 S 14.1 HS 40.7L 116 0.8 4 BIV Valdrome 2004 8 14.02 S 14.4 HS 40.7L 116 0.8 5 BIV Valdrome 2004 8 12.01 S 14.4 HS 40.7L 233 0.8 4 BIV Valdrome 2004 7 27.995 S 14.7 HS 31.0J 143 0.5 7 DIJ Sint Annen 2004 7 27.992 S 14.5:HS 31.0J 143 &0.3 6 BOU Sint Annen (Small, nearly stellar object with faint nebulosity observed at calculated position [orbital elements from MPC 52315 for epoch 2004 July 14 used], close to star of magnitude 14.5 [HS]. DSS shows nothing but that single mag. 14.5 star near this position.)