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* * * * * C/2004 F4 (Bradfield) * * * * *
lightcurve and images Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2004 6 27.01 S 12.8:SK 20.3L 63 1.5 1 GUZ Krosno 2004 6 23.98 S 12.2 TK 20.3L 63 1.5 2 GUZ Krosno 2004 6 21.99 S 12.0 TK 20.3L 63 1.5 2/ GUZ Krosno 2004 6 20.05 S 12.8:HS 40.7L 233 1.0 2 BIV Poigny-la-foret 2004 6 20.04 S 13.0:HS 40.7L 58 1.4 2 BIV Poigny-la-foret 2004 6 14.03 S 13.3:HS 40.7L 116 1.3 2 BIV Poigny-la-foret 2004 6 14.02 S 13.6:HS 40.7L 233 1.0 3 BIV Poigny-la-foret 2004 6 13.98 S 11.4 TK 20.3L 63 2 3 GUZ Krosno 2004 6 13.08 S 11.5 TK 20.3T 100 1.2 3 GON Alto del Castro, Leon 2004 6 2.01 S 10.8 TK 20.3L 63 1.5 4 GUZ Krosno (Moonlight.) 2004 5 30.01 S 11.0 AC 13.0L 45 0.8 2 RES Ostrorog 2004 5 29.01 S 10.8 AC 13.0L 45 1.0 1/ RES Ostrorog 2004 5 28.985 S 10.1 TK 25.4J 72 2.2 2/ BOU Sint Annen (Moonlight.) 2004 5 27.02 S 10.3 AC 13.0L 45 1.0 2 RES Szamotuly 2004 5 25.08 S 10.7 TK 40.7L 58 3.0 3 0.33 310 BIV Ablis 2004 5 23.06 S 11.0:TK 40.7L 58 3.0 3 0.33 315 BIV Ablis 2004 5 22.999 S 9.2 TK 25.4J 58 2.1 2/ DIJ Sint Annen 2004 5 22.996 S 9.2 TK 25.4J 58 2.8 3 BOU Sint Annen 2004 5 19.09 S 9.5 TK 40.7L 58 3.5 3 0.7 310 BIV Lezeaux 2004 5 18.984 S 8.6 TK 25.4J 58 2.0 3/ 23m 295 DIJ Sint Annen 2004 5 18.982 S 8.7 TK 25.4J 58 3.2 4 0.3 300 BOU Sint Annen 2004 5 18.09 S 9.5 TK 40.7L 58 3.5 4 0.6 300 BIV Lezeaux 2004 5 17.12 S 9.4 TK 40.7L 58 4.0 2/ 0.5 300 BIV Lezeaux 2004 5 16.982 S 8.4 TK 8.0B 15 4.5 4 DIJ Sint Annen (In 31.0J at 72x, tail 0.3 deg. in p.a. 300 deg.) 2004 5 16.979 S 8.6 TK 8.0B 15 4.2 3 BOU Sint Annen 2004 5 16.972 M 8.5 TK 31.0J 72 3.3 4 0.25 302 BOU Sint Annen 2004 5 16.11 S 8.1 TK 8.0B 11 3 7 0.7 310 GON Alto del Castro - Aralla, Leon 2004 5 16.10 S 8.3 TK 20.3T 77 3 6 0.5 310 GON Alto del Castro - Aralla, Leon 2004 5 16.06 S 8.4 AC 13.0L 45 2 3/ RES Ostrorog 2004 5 16.022 S 8.5 TK 25.4J 58 2.8 4 0.3 305 BOU Sint Annen (Some interference from nearby 41 And. Tail very faint.) 2004 5 16.006 M 8.4 TK 25.4J 58 3.4 3/ 0.25 312 DIJ Sint Annen 2004 5 15.06 S 8.2 AC 13.0L 45 2 3 RES Ostrorog 2004 5 15.04 M 8.5 TK 20.3L 63 4 5 0.5 300 GUZ Krosno (The tail was rather faint. Comet was also faintly visible in binoculars.) 2004 5 15.026 S 8.3 TK 6.0B 15 4.5 3 DIJ Middelbert 2004 5 13.14 B 8.2 TK 5.0B 7 5 4 1.5 305 BIV Pico-Veleta, Spain 2004 5 13.01 S 8.2 TK 20.3T 77 3 4 GRA Fjellhamar (Only barely visible, but seen at correct position. Twilight [solar altitude -11 deg.]. NEL = 4.0 near comet.) 2004 5 12.16 S 7.8 TK 5.0B 7 4 5 1.5 305 BIV Pico-Veleta, Spain 2004 5 12.15 S 8.5:TK 20.3T 67 4.0 5 0.6 310 BIV Pico-Veleta, Spain 2004 5 10.05 M 7.8 TK 5.0B 10 4 6 2.3 300 GUZ Krosno (Comet was still an impressive object with long although faint tail. Conditions very good, NEL~5.5 near the comet.) 2004 5 9.15 S 7.8 TK 20.3T 67 3.0 5 0.8 300 BIV Pico-Veleta, Spain 2004 5 9.15 B 7.6 TK 5.0B 7 4 5 1.3 300 BIV Pico-Veleta, Spain 2004 5 8.15 S 7.8 TK 20.3T 67 3.0 5 0.83 305 BIV Pico-Veleta, Spain 2004 5 8.14 B 7.7 TK 5.0B 7 4 6 2.5 300 BIV Pico-Veleta, Spain 2004 5 8.08 S 7.8 AC 6.0B 7 & 2 3 RES Ostrorog 2004 5 7.15 S 7.4 TK 20.3T 67 3.0 6 0.5 315 BIV Pico-Veleta, Spain 2004 5 7.15 S 7.0 TK 5.0B 7 3 6 BIV Pico-Veleta, Spain 2004 5 5.22 M 7.0 TK 7.0R 24 2.5 5 GRA Funchal, Madeira (Rather weak, but certainly seen. Moon. NEL = 3.5 [approx.].) 2004 5 4.22 M 6.8 TK 7.0R 24 3 6 GRA Funchal, Madeira (Rather pale, but seen with certainty. Altitude 18 deg and Sun 13 deg under horizon. Moonlight. NEL = 3.5 [approx.].) 2004 5 4.07 M 6.7 TK 5.0B 10 4 6 GUZ Krosno (Again much fainter than previously - comet is fading quickly now. Tail was not visible.) 2004 5 2.03 M 6.3 TK 7.0R 24 2.5 6/ GRA Fjellhamar (Coma more diffuse than before. Comet altitude 12 deg and Sun 12.5 deg below horizon. NEL = 3.0 [approx].) 2004 5 1.12 B 6.5:TK 5.0B 7 6 320 BIV Pico-Veleta, Spain 2004 5 1.094 M 5.8 TK 6.0B 15 7 0.5 296 DIJ Noorddijk 2004 5 1.08 S 5.8 AC 6.0B 7 & 2 5/ 0.2 310 RES Ostrorog 2004 5 1.07 M 5.9 TK 5.0B 10 3 7 0.6 305 GUZ Krosno (Comet noticeably fainter than previously, tail only faintly visible.) 2004 4 30.08 S 5.6 AC 6.0B 7 & 3 6 0.5 300 RES Ostrorog (Click here for a 5m image with 58mm lens+CCD+V-filter.) 2004 4 29.04 M 5.5 TK 15.2L 44 1.5 7 GRA Fjellhamar (No tail seen. Altitude 9 deg. Observed in poor conditions [street lights and poor transparency]. NEL = 2.5 [approx.] near comet.) 2004 4 28.07 M 5.2 TK 5.0B 10 2 8 5.5 300 GUZ Krosno (The first observation from dark location. Very long slightly curved tail was observed with the comet's head covered by clouds. Comet was also faintly visible with naked eye: m1=5.0, Dia= - , DC=9, Tail 2 deg in p.a. 300 deg. Amazing comet!) 2004 4 27.16 B 5.1 TK 5.0B 7 2 8 8.0 305 GON Alto del Castro - Aralla, Leon (Mountain location, clear sky. Astronomical twilight. Comet visible to naked eye. Comparison stars at the same low altitude as the comet.) 2004 4 27.098 M 5.1 TK 8.0B 15 8 3.8 298 DIJ Sint Annen 2004 4 27.091 M 5.1 TK 8.0B 15 8 3.0 300 BOU Sint Annen (Appearance of comet very reminiscent of C/1980 Y1 (Bradfield). In 25.4cmJ the head of the comet looked like a very compact unresolved globular cluster with a diameter of ~1.5'.) 2004 4 27.08 M 5.3 TK 5.0B 10 1 8 GUZ Warsaw 2004 4 26.16 $B 4.8 HV 40.7L 58 1.0 8 1.0 310 BIV Poigny-la-foret 2004 4 26.14 $B 4.6 HV 5.0B 7 1.5 8 2.5 310 BIV Poigny-la-foret 2004 4 26.09 M 4.8 TK 5.0B 10 1 8/ GUZ Warsaw (Observation made close to the centre of the biggest Polish city, light pollution and twilight, only starlike central condensation visible.) 2004 4 25.15 $B 3.7 TK 5.0B 7 2 8 11.5 300 GON Puerto de Aralla, Leon 2004 4 25.12 $I 4.0 TK 0.0E 1 9 8.5 300 GON Puerto de Aralla, Leon (Mountain location, very clear sky. Magnitude estimate corrected for atmospheric extinction with ICQ winter table. Very low altitude. Beginning of astronomical twilight. Impressive sight in 7x50B. Tail 8.5 deg. long visible to naked eye.) 2004 4 25.115 S 5.5 S 5.0B 10 3 9 1 LOO Genk 2004 4 24.115 S 4.8 S 5.0B 8 3 9 2 LOO Vielsalm 2004 4 24.08 B 5.0 TK 6.3B 9 0.5 8 0.06 305 DAH Fjellhamar (Comet easily visible in binoculars. Almost stellar coma with short tail. Comparison stars Eta [38] And and Phi [85] Psc were both at similar altitude as the comet, and no extinction correction was applied. Clear sky.) 2004 4 24.07 B 4.7 TK 7.0R 24 0.7 8 GRA Fjellhamar 2004 4 24.07 B 4.7 TK 5.0B 7 1 8 GRA Fjellhamar (The comet showed a small and bright coma, but no tail was seen visually. This was a quite challenging observation due to low altitude [4 1/2 deg.] and nautical twilight [Sun 11 deg. below horizon]. The field was subsequently imaged using a Minolta DiMAGE Z1 digital camera with a 58mm f/3.5 lens. An image from Apr. 24.078 UT [exposure 2 seconds, ISO 200) showed a coma of about 1' and there was a hint of a 8' long tail in p.a. 300 deg. NEL = 2.0 [approx.] near comet.) 2004 4 23.21 $B 3.9 TK 20.3T 77 0.5 8 0.1 290 GON Puerto de Aralla, Leon (Mountain location, clear sky. Magnitude estimate corrected for atmospheric extinction with ICQ winter table. Very low altitude: 5 deg. Short dust fanned tail visible in nautical twilight.) 2004 4 23.15 $B 3.5 HV 26.0L 0.8 0.3 330 BIV Poigny-la-foret 2004 4 23.15 $B 3.3 HV 5.0B 7 1 BIV Poigny-la-foret