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* * * * * C/2022 E3 (ZTF) * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2023 6 10.35 M 13.1 AQ 40.0L 182 1.0 4 WYA Walcha, NSW (Low altitude 8.3°. Slight twilight interference.) 2023 3 26.87 S 9.9 TK 20.3T 77 4 5 GON Alto del Trichero, León 2023 3 18.44 M 9.3 TK 7.0B 15 7.5 4/ WYA Walcha, NSW (Diffuse coma, opaque centre.) 2023 3 16.44 M 9.3 TK 7.0B 15 5.5 4 WYA Walcha, NSW (Diffuse coma, opaque centre.) 2023 3 15.86 S 9.4 TK 20.3T 77 5 5 0.2 60 GON Alto del Trichero, León 2023 3 15.854 S 9.0 TK 15.5L 42 7 2/ DIJ Burlage 2023 3 15.40 M 9.6 TK 7.0B 15 7 4/ WYA Walcha, NSW (Extended outer coma, opaque centre.) 2023 3 14.843 S 9.8 TK 25.4J 58 3.2 3 BOU Westerwijtwerd (Comet close to star of magn. 8.3. Altitude 18.4°.) 2023 3 14.81 S 9.6 TK 20.0L 80 & 2 2 SCH Eerbeek 2023 3 14.802 S 9.1 TK 15.5L 29 5 3/ DIJ Burlage 2023 3 13.806 S 9.7 TK 25.4J 58 3.5 3/ BOU Westerwijtwerd 2023 3 11.812 S 9.5 TK 25.4J 47 4 3/ BOU Westerwijtwerd 2023 2 28.903 S 8.0 TK 8.0B 15 7 3 DIJ Burlage (Moonlight.) 2023 2 27.98 S 7.8 HD 10.0B 20 7 2/ GOI Araçatuba (Moonlight.) 2023 2 27.02 S 7.6 HD 10.0B 20 7 2/ GOI Araçatuba (Moonlight, clouds.) 2023 2 25.965 S 8.4 TK 8.0B 15 4.5 2/ DIJ Burlage (Altitude 9°. Moonlight.) 2023 2 25.803 M 7.9 TK 8.0B 15 7 4 BOU Westerwijtwerd (Moonlight.) 2023 2 23.82 S 7.7 TK 8.0B 15 &10 4 SCH Eerbeek (Small moon low above horizon, comet close to star of magnitude 7.7.) 2023 2 21.99 S 6.8 HD 5.0B 7 15 2/ GOI Araçatuba 2023 2 21.98 S 7.0 HD 10.0B 20 10 4 GOI Araçatuba 2023 2 21.44 M 7.7 TK 7.0B 15 7.5 5/ WYA Walcha, NSW (Close to stars, opaque centre.) 2023 2 20.43 M 7.6 TK 7.0B 15 10 5 20m 43 WYA Walcha, NSW (Dust tail visible. Opaque centre, well condensed. Transparent outer coma.) 2023 2 19.86 S 6.9 TK 5.6B 8 &15 4 SCH Eerbeek (Hint of tail in p.a. 50 deg. in 15x80B and 20.0cmL at 42x.) 2023 2 18.99 S 6.6 HD 10.0B 20 15 5 GOI Araçatuba 2023 2 16.92 S 6.2 TK 5.0B 10 15 5/ 1.2 30 GON Cueto Rosales, León 2023 2 16.44 M 6.9 TK 7.0B 15 10 5/ 38m 28 WYA Walcha, NSW (Dust tail visible. Inner coma enhances in Swan Band filter.) 2023 2 16.43 S 6.5 AA 5.0B SEA Cowra, NSW (Some smoke haze present.) 2023 2 15.939 M 6.6 TK 5.0B 10 10 4/ BOU Sint Annen 2023 2 15.46 M 6.8 TK 5.0R 10 9 5/ WYA Walcha, NSW (Opaque centre, sometimes show stellar pseudo-nucleus. Diffuse and extended outer coma, opaque inner coma.) 2023 2 14.86 S 6.7 TK 5.6B 8 &10 5 SCH Bussloo (In 15x80B, hint of tail [about 0.3 degree in p.a. 20 deg.?]. In 35.6cmT at 98x, coma with central condensation and broad hint of dusttail [p.a. 75-95 deg.]) 2023 2 14.812 S 6.4 TK 8.0B 15 7.5 5 24m 61 DIJ Burlage 2023 2 14.799 S 6.7 TK 5.0B 10 4.5 5 LOO Genk 2023 2 14.773 M 6.5 TK 5.0B 10 10 4 BOU Sint Annen 2023 2 13.892 M 6.5 TK 8.0B 15 10 4/ BOU Groningen 2023 2 13.839 S 6.7 TK 8.0B 15 9 4 30m 78 DIJ Burlage 2023 2 13.764 S 7.0 TK 5.0B 10 3 5 LOO Genk 2023 2 12.862 S 6.2 TK 5.0B/ 10 6 6 LOO Genk 2023 2 12.46 S 5.9 AA 5.0B 10 SEA Cowra, NSW (Slightly fainter through Swan Band filter.) 2023 2 11.46 B 6.0 AA 10.0B 25 SEA Cowra, NSW 2023 2 10.83 S 5.6 TK 5.0B 10 20 5/ 1.2 20 GON Alto del Trichero - Soto y Amío, León (Dust tail. Also ion tail 1.7 degree in p.a. 80 deg.) 2023 2 10.82 S 5.3 TK 0.0E 1 22 6/ GON Alto del Trichero - Soto y Amío, León 2023 2 9.93 S 6.0 TK 5.6B 8 &15 5 SCH Eerbeek (Moonlight.) 2023 2 8.78 S 5.8 TK 5.6B 8 &16 6 SCH Eerbeek (In 15x80B, dusttail of about 0.4 degree in p.a. 65 deg. Comet close to star ι Aur [2.8]. Glimpsed with naked eye?) 2023 2 8.774 M 5.8 YG 5.0B 10 15 4/ 1.5 30 BOU Sint Annen (Very faint, broad dusttail.) 2023 2 8.773 S 6.1 TK 5.0B 10 10 7 LOO Genk 2023 2 8.769 S 6.3 TK 8.0B 15 8 5 35m 62 DIJ Burlage 2023 2 7.98 S 5.9 HD 5.0B 7 15 4 GOI Araçatuba 2023 2 7.97 S 6.1 HD 10.0B 20 10 5/ 40m 90 GOI Araçatuba 2023 2 7.76 S 5.6 TK 5.6B 8 &15 6 SCH Eerbeek (In 15x80B, dusttail of about 0.3 degree in p.a. 75 deg. Comet close to star ω Aur.) 2023 2 7.754 S 6.3 TK 5.0B 10 10 6 LOO Genk 2023 2 7.753 M 5.6 YG 5.0B 10 15 5/ BOU Sint Annen (Comet close to ω Aur.) 2023 2 7.43 M 5.9 AA 10.0B 25 SEA Cowra, NSW 2023 2 7.42 M 6.2 TK 7.0B 15 8 5/ WYA Walcha, NSW (Close to bright star. Altitude 19.2°. Slight twilight and Moonlight interference. Magnitude uncorrected, clouds ended observation. 2023 2 6.97 S 5.6 HD 10.0B 20 8 6 GOI Araçatuba 2023 2 6.757 S 5.8 TK 8.0B 15 11 5 DIJ Burlage (Moonlight.) 2023 2 6.756 M 5.5 YG 5.0B 10 16 4/ BOU Groningen (Moon 8° up in the East, kept behind trees.) 2023 2 6.75 S 5.5 TK 5.6B 8 &15 6 SCH Eerbeek (At end of twilight. Moon low above horizon. Hint of tail in p.a. 15 deg.) 2023 2 6.45 M 5.9 TK 7.0B 15 10 6 WYA Walcha, NSW (Slight twilight interference, Moonlight interference [altitude 6.6°]. Comet altitude 14.5°. Magnitude uncorrected. Coma enhances in Swan Band filter. Diffuse coma with faint stellar pseudo-nucleus visible, hint of broad tail to the East approximately. Low cloud ended observations.) 2023 2 6.43 S 6.1 AA 10.0B 25 7 SEA Cowra, NSW (Twilight & moonlight. Initially, comet appeared slightly fainter through Swan Band filter, but as sky darkened somewhat, it seemed very slightly brighter through filter.) 2023 2 5.90 S 5.6 TK 5.6B 8 &12 6/ SCH Eerbeek (Bright moonlight.) 2023 2 5.861 S 5.8 TK 8.0B 15 10 5/ DIJ Burlage (Full moon.) 2023 2 4.46 M 6.8 TK 25.0L 40 2.8 6 WYA Walcha, NSW (Strong Moonlight interference. Low altitude 3.4°. Whitish coloured pseudo-nucleus visible with small opaque inner coma, outer coma washed out by moonlight. Coma does not enhance in Swan Band filter. Not visible in 15x70B under moonlit conditions. No extinction corrections applied, comparison stars were within ¾ of a degree or less altitude than the comet altitude.) 2023 2 1.969 M 5.0 YG 5.0B 10 20 5 BOU Groningen (Moonlight.) 2023 2 1.840 S 5.0 TK 8.0B 15 9 5 DIJ Burlage (Moonlight.) 2023 2 1.25 S 4.5 TK 0.0E 1 25 6 GON Alto del Trichero - Soto y Amío, León 2023 2 1.24 S 4.7 TK 5.0B 10 20 5 GON Alto del Trichero - Soto y Amío, León 2023 1 31.81 S 5.2 TK 5.6B 8 &20 5 SCH Eerbeek (Due to bright moonlight no tail visible.) 2023 1 31.793 S 5.1 TK 5.0B 10 10 6 LOO Genk (Moonlight.) 2023 1 31.762 M 4.9 YG 5.0B 10 20 4/ BOU Zuidwolde (Moonlight.) 2023 1 31.750 M 5.0 TK 8.0B 15 14 5 DIJ Burlage (Moonlight.) 2023 1 31.19 S 4.8 TK 5.0B 10 20 5 GON Alto del Trichero - Soto y Amío, León 2023 1 31.18 S 4.6 TK 0.0E 1 25 6 GON Alto del Trichero - Soto y Amío, León 2023 1 31.135 S 5.4 TK 5.0B 10 10 6 LOO Genk 2023 1 30.90 S 5.4 TK 5.6B 8 &22 6 0.5 230 SCH Bussloo ((Bright moonlight. Weak tail, slightly better in 15x80B.) 2023 1 30.792 M 4.3 TK 8.0B 15 19 6 DIJ Burlage (Moonlight. Visible with naked eye.) 2023 1 30.758 M 4.9 YG 5.0B 10 22 4/ BOU Zuidwolde (Moonlight.) 2023 1 30.198 I 4.6 TK 0.0E 1 15 6/ DIJ Burlage 2023 1 30.198 M 4.6 TK 8.0B 15 15 6/ 1.0 215 DIJ Burlage 2023 1 29.100 S 5.4 TK 5.0B 10 10 5 LOO Genk 2023 1 28.823 S 5.4 TK 5.0B 10 7 5 LOO Genk 2023 1 28.235 M 4.6 TK 8.0B 15 15 6 DIJ Burlage 2023 1 26.799 M 5.1 YG 5.0B 10 18 5 BOU Sint Annen (Moonlight.) 2023 1 22.98 S 5.5 TK 0.0E 1 15 6 GON Villacintor, León 2023 1 22.94 S 5.7 TK 5.0B 10 15 5 1.8 300 GON Villacintor, León (Dust tail.) 2023 1 22.006 M 5.8 YG 5.0B 10 12 5 BOU Sint Annen 2023 1 21.89 S 5.7 TK 5.6B 8 &20 6 SCH Eerbeek (Altitude 19°. Not visible with naked eye.In 15x80B, dusttail of about 0.6 degree in p.a. 340 deg.) 2023 1 21.750 M 6.0 TK 8.0B 15 6 6/ 1.1 357 DIJ Burlage 2023 1 21.180 S 6.1 TK 5.0B 10 3.5 5 LOO Genk 2023 1 21.15 S 5.8 TK 5.6B 8 &20 5 SCH Eerbeek (Not visible with naked eye. In 15x80B, iontail of about 1 degree in p.a. 310 deg. and broad dusttail of about 0.2 degree in p.a. 0 deg.) 2023 1 20.799 M 5.9 TK 8.0B 15 9 6/ 1.1 346 DIJ Burlage 2023 1 19.977 M 6.1 YG 8.0B 15 10 6 0.6 340 BOU Zuidwolde (Faint dust tail. Also very faint gastail visible, 1.1 degree long in p.a. 305 deg.) 2023 1 19.847 M 5.9 TK 8.0B 15 10 6/ 1.1 348 DIJ Burlage 2023 1 18.205 S 6.6 TK 5.0B 10 2.5 6 LOO Genk 2023 1 18.18 S 6.0 TK 5.6B 8 18 5 SCH Eerbeek (Short tail visible in 8x56B. In 15x80B iontail of about 1.5 degree in p.a. 300 deg. and dusttail of about 0.5 degree in 330 deg. Not [yet?] visible with naked eye. In 20.0L at 42x, clear central condensation m2 = 10.2.) 2023 1 17.947 M 6.3 TK 8.0B 15 &10 5 0.4 340 BOU Sint Annen (Altitude 17.3°. Faint dustfan, getting more asymmetric and longer than on december 30.) 2023 1 17.719 M 6.5 TK 8.0B 15 6.5 6 DIJ Burlage 2023 1 17.24 S 6.4 TK 5.6B 8 &18 6 SCH Eerbeek (No tail visible in 8x56B. In 15x80B, iontail of about 1 degree in p.a. 305 deg. and dusttail of about 0.3 degree in p.a. 325 deg.) 2023 1 17.203 S 6.7 TK 5.0B 10 2 6 LOO Genk (Moonlight.) 2023 1 13.197 S 7.1 TK 5.0B 10 3.5 6 LOO Genk (Moonlight.) 2023 1 10.213 S 7.4 TK 5.0B 10 4 5 LOO Genk (Moonlight.) 2023 1 3.20 S 6.7 TK 5.0B 10 10 5/ GON Sierra del Fito, Asturias 2023 1 3.188 M 7.2 TK 8.0B 15 6.5 7/ DIJ Burlage 2022 12 30.17 S 7.0 TK 5.6B 8 &10 6 SCH Eerbeek (In 20.0L at 42x, hint of short, broad dusttail ~0.1° long in p.a. 340-40 deg.) 2022 12 30.142 S 7.7 TK 10.0B 14 2.5 6 LOO Genk 2022 12 30.129 S 7.7 TK 8.0B 15 7.5 5 0.2 0 BOU Sint Annen (Broad, faint dustfan roughly pointing north.) 2022 12 30.050 S 7.7 TK 8.0B 15 7 6 41m 328 DIJ Burlage 2022 12 28.18 S 7.3 TK 5.0B 10 7 5 GON Aldeanueva de Figueroa, Salamanca 2022 12 27.19 S 8.0 TK 8.0B 15 & 8 4/ SCH Eerbeek (In 20.0L at 42x, hint of short, broad dusttail ~0.1° long in p.a. 355-020 deg.) 2022 12 27.073 S 8.2 TK 8.0B 15 6 5/ 13m 346 DIJ Burlage 2022 12 24.15 S 8.2 TK 8.0B 15 & 5 4/ SCH Eerbeek 2022 12 18.228 S 8.9 TK 10.0B 14 2 5 LOO Genk (Moonlight, twilight.) 2022 12 14.715 M 8.6 TK 25.4J 58 3.5 5/ BOU Westerwijtwerd (Altitude 10.6°.) 2022 12 13.712 S 8.6 TK 15.5L 42 4 5 DIJ Burlage 2022 12 13.251 S 9.0 TK 10.0B 14 2 5 LOO Genk (Moonlight, twilight.) 2022 12 12.717 M 8.7 TK 25.4J 58 3.4 4/ BOU Sint Annen (Altitude 10.9°.) 2022 12 12.715 S 8.5 TK 8.0B 15 3.5 5 DIJ Burlage 2022 12 12.229 S 9.1 TK 10.0B 14 2 5 LOO Genk (Moonlight.) 2022 12 2.24 S 9.2 TK 20.3T 77 3 4/ GON Alto del Castro, León 2022 11 25.74 S 9.4 TK 35.6T 98 2 5 SCH Bussloo (Altitude 14°.) 2022 11 25.724 M 9.4 TK 25.4J 72 2.5 5 BOU Sint Annen (Altitude 17.4°.) 2022 11 24.728 M 9.4 TK 25.4J 72 2.5 5/ BOU Sint Annen (Altitude 17.0°.) 2022 11 19.75 S 9.5 TK 35.6T 98 3 5 SCH Bussloo (Altitude 15°. Also weakly in 38x200L.) 2022 11 19.731 M 9.5 TK 25.4J 58 2.4 5/ BOU Sint Annen 2022 11 19.728 S 9.5 AQ 15.5L 42 3.0 4/ DIJ Burlage 2022 11 18.80 S 9.6 TK 20.3T 77 3 4 GON Villacintor, León (Altitude 10°.) 2022 11 16.74 S 9.7 TK 20.0L 80 & 2 6 SCH Eerbeek (Altitude 19°.) 2022 11 14.770 S 9.7 AQ 15.5L 42 3.0 4 DIJ Burlage 2022 11 13.740 M 9.8 TK 25.4J 58 2.5 5 BOU Sint Annen 2022 11 13.732 S 9.8 AQ 15.5L 42 3.0 4 DIJ Burlage 2022 11 12.75 S 9.9 TK 35.6T 98 & 3 5/ SCH Bussloo (Altitude 19°.) 2022 10 27.750 M 10.5 AQ 25.4J 72 2.0 5/ BOU Sint Annen 2022 10 24.751 M 10.6 AQ 25.4J 58 2.3 5/ BOU Sint Annen 2022 10 22.788 S 10.7 AQ 15.5L 50 2.9 3 DIJ Burlage 2022 10 22.752 M 10.6 AQ 25.4J 58 2.2 5 BOU Sint Annen 2022 10 18.78 S 10.8 TK 20.0L 80 3 5 SCH Eerbeek (Weakly visible. Comet 4’ from TYC 2037-0967-1 and 20’ from δ CrB.) 2022 10 2.842 M 11.2 AQ 25.4J 72 2.0 5 BOU Westerwijtwerd 2022 10 2.82 S 11.2 TK 20.0L 114 & 2 5 SCH Eerbeek (Weakly visible, comet between weak stars. Moon very low in SSW.) 2022 10 1.810 M 11.3 AQ 25.4J 58 2.0 4/ BOU Westerwijtwerd 2022 10 1.794 S 11.4 AQ 15.5L 42 2.2 3 DIJ Burlage 2022 9 28.882 S 11.4 AQ 15.5L 50 2.5 3 DIJ Burlage 2022 9 28.85 S 11.0 TK 20.0L 114 2 5 SCH Eerbeek (Weakly visible.) 2022 9 28.815 M 11.5 AQ 25.4J 72 1.8 5/ BOU Westerwijtwerd 2022 9 24.816 M 11.6 AQ 25.4J 72 1.5 5/ BOU Westerwijtwerd 2022 9 21.836 S 11.6 AQ 31.0J 89 2.2 3/ DIJ Burlage 2022 9 21.833 M 11.7 AQ 31.0J 89 1.5 5/ BOU Burlage, Germany 2022 9 20.847 S 11.6 AQ 15.5L 50 2.5 3 DIJ Burlage 2022 9 19.87 S 11.4 TK 35.6T 140 & 2 6 SCH Bussloo (Comet close to a group of weak stars.) 2022 9 19.83 S 11.4 AQ 20.3T 77 2.2 5 GON Sierra de Tineo, Asturias 2022 9 19.38 M 12.2 AQ 40.0L 108 1.5 6 2.4m 110 Walcha, NSW (Low altitude 11.5°. Faint tail visible. Faint stellar pseudo-nucleus visible in good seeing.) 2022 9 18.88 S 11.0:TK 20.0L 80 & 2 1 SCH Eerbeek (Very faint. Difficult observation.) 2022 9 17.38 M 11.9 AQ 40.0L 108 1.3 6 2.5m 104 WYA Walcha, NSW (Altitude 15.9°. Faint tail visible. Opaque centre, stellar pseudo-nucleus visible. No enhancement in Swan Band filter. Very windy conditions.) 2022 9 3.98 S 11.9 AQ 20.3T 100 2.2 5 GON Alto del Castro, León 2022 9 1.869 S 12.0 AQ 31.0J 89 1.0 4 DIJ Burlage 2022 9 1.866 M 12.3 AQ 31.0J 89 1.2 6 BOU Burlage, Germany 2022 8 25.901 S 12.2 AQ 31.0J 89 1.0 4/ DIJ Burlage 2022 8 25.899 M 12.5 AQ 31.0J 89 1.2 5/ BOU Burlage, Germany 2022 8 20.40 M 12.9 AQ 40.0L 108 0.8 6 1.5m 116 Walcha, NSW (Faint tail visible. Stellar pseudo-nucleus visible.) 2022 8 3.960 M 13.0 AQ 31.0J 109 0.8 6 BOU Burlage, Germany 2022 8 3.958 S 12.6 AQ 31.0J 109 0.7 4 DIJ Burlage 2022 8 1.02 S 12.5 AQ 20.3T 133 0.6 6 GON Riberos de la Cueza, Palencia 2022 7 29.55 M 13.5 AQ 40.0L 182 0.7 5/ 1.2m 129 WYA Walcha, NSW (Faint tail visible. Stellar pseudo-nucleus and opaque inner coma. Altitude 15.9°.) 2022 7 25.47 M 13.4 AQ 40.0L 182 0.4 6 1.2m 123 WYA Walcha, NSW (Faint tail visible. Stellar pseudo-nucleus, opaque centre.) 2022 7 19.96 S 12.7 AQ 20.3T 133 0.7 5 GON Alto del Castro, León 2022 6 28.03 I 13.7 AQ 20.3T 133 0.4 7 GON Alto del Trichero - Soto y Amío, León (Field stars checked in DSS.) 2022 6 24.49 M 14.1 AQ 40.0L 261 0.3 5/ WYA Walcha, NSW (Altitude 14.5°. Opaque coma, faint stellar pseudo-nucleus visible in good seeing periods.) 2022 6 22.53 M 14.1 AQ 40.0L 261 0.3 5/ WYA Walcha, NSW (Opaque coma, faint stellar pseudo-nucleus visible in good seeing periods. Coma disappears in Swan Band filter.)