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* * * * * 13P/Olbers * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2024 10 20.79 S 8.9 TK 20.3T 100 4 4 GON Gamoniteiro - Sierra del Aramo, Asturias (Altitude 8°. End of astronomical twilight.) 2024 10 5.778 S 9.6 TA 25.4J 72 3 4 BOU Westerwijtwerd (Comet altitude 9.3° with Sun at -15.8°.) 2024 10 4.778 S 9.6 TA 25.4J 72 3.2 3/ BOU Westerwijtwerd (Comet altitude 9.7° with Sun at -15.5°.) 2024 9 27.82 S 8.6 TK 7.0B 15 4 5/ GON Santiago Millas, León (Altitude 13°.) 2024 9 21.806 S 9.4 TK 15.5L 42 3 2 DIJ Burlage (Moonlight.) 2024 9 14.804 S 8.4 TK 15.5L 42 3 2 DIJ Burlage (Moonlight.) 2024 9 11.815 S 8.4 TK 15.5L 42 3 3 DIJ Burlage (Moonlight.) 2024 9 8.85 S 7.7 TK 5.0B 10 5 5/ 0.5 50 GON Collada de Aralla, León (Altitude 15°.) 2024 9 8.84 S 8.2 TK 20.0L 42 5 5 SCH Eerbeek (Altitude comet 12°, altitude Sun -18°.) 2024 9 8.824 aM 8.3 HI 25.4J 58 3.5 4/ BOU Westerwijtwerd (Comet altitude 14.3° with Sun at -14.9°.) 2024 9 5.837 S 8.2 TK 15.5L 42 5 4 DIJ Burlage 2024 9 5.831 S 8.2 HI 15.6L 45 4 4 BOU Westerwijtwerd (Comet altitude 14.3° with Sun at -15.2°.) 2024 9 1.837 S 8.1 TK 8.0B 15 5 3 DIJ Burlage 2024 8 31.93 S 8.1 TK 10.0B 20 4 4 GOI Araçatuba (Comet altitude 15°. Sun altitude -15°.) 2024 8 31.856 M 8.2 HI 15.5L 36 4 4/ BOU Burlage, Germany (Comet altitude 11.3°.) 2024 8 31.855 S 8.0 HI 15.5L 36 3.7 3 DIJ Burlage 2024 8 29.36 M 8.3 TK 40.0L 59 2.8 5/ 4m 82 WYA Walcha, NSW (Low altitude 10.8°. Coma enhances well in Swan Band filter. Faint broad tail visible. Opaque inner coma and whitish in colour, outer coma appears pale aqua-blue.) 2024 8 28.840 S 7.8 TK 8.0B 15 5 3 DIJ Burlage 2024 8 27.854 M 7.8 HI 8.0B 15 4.5 5/ BOU Zuidwolde (Comet altitude 14.3° with Sun at -15.9°.) 2024 8 27.85 S 7.6 TK 20.0L 42 4 5 SCH Eerbeek (Altitude comet 15°, altitude Sun -16°.) 2024 8 25.852 M 7.9 HI 8.0B 15 4.5 5 BOU Zuidwolde (Comet altitude 15.6° with Sun at -14.9°. Observed just before Moonrise.) 2024 8 23.87 S 6.9 TK 5.0B 10 5 5/ 0.6 60 GON Collada de Aralla, León (Altitude 19°.) 2024 8 21.865 S 7.5 TK 8.0B 15 4 4 DIJ Burlage 2024 8 17.93 S 7.4 HD 22.0L 60 4 3/ GOI Araçatuba (Comet altitude 13°, Sun altitude -15°. Moonlight.) 2024 8 12.903 S 7.2 TK 8.0B 15 5 5 DIJ Burlage 2024 8 12.889 M 7.4 HI 8.0B 15 5 6 BOU Zuidwolde (Comet altitude 14.3° with Sun at -15.9°.) 2024 8 12.88 S 7.8 TK 20.0L 38 & 5 5 SCH Bussloo (Altitude comet 15°, altitude Sun -16°.) 2024 8 11.92 S 7.4 HD 10.0B 20 4 4 GOI Araçatuba (Comet altitude 14°, Sun altitude -12°. Moonlight.) 2024 8 11.888 S 7.3 TK 8.0B 15 6 6 DIJ Burlage 2024 8 11.885 M 7.5 HI 8.0B 15 5 5/ BOU Burlage, Germany (Comet altitude 14.7° with Sun at -15.7°.) 2024 8 9.906 S 7.5 TK 10.0B 14 4.5 6 LOO Genk 2024 8 9.90 S 7.2 TK 8.0B 15 & 7 6 SCH Bussloo (Altitude comet 13°. Comparision stars at same altitude as comet.) 2024 8 9.896 S 7.2 TK 8.0B 15 5 6 DIJ Burlage 2024 8 7.890 M 7.5 HI 8.0B 15 & 4 5 BOU Zuidwolde (Comet altitude 15.9° with Sun at -14.6°. Observed before incoming clouds.) 2024 8 7.875 S 7.0 TK 8.0B 15 5 6 DIJ Burlage 2024 8 6.35 M 7.9 TK 25.0L 40 4 6 WYA Walcha, NSW (Low altitude 5.8°. Coma enhances well in Swan Band filter. Stellar pseudo-nucleus visible.) 2024 8 4.93 S 7.3 HD 10.0B 20 4 4/ GOI Araçatuba (Comet altitude 9°, Sun altitude -16°.) 2024 8 2.917 S 7.1 TK 8.0B 15 5 6 DIJ Burlage 2024 8 2.908 M 7.3 HI 8.0B 15 4.5 5/ BOU Sint Annen (Comet altitude 14.3° with Sun at -15.3°.) 2024 8 2.90 S 6.6 TK 5.0B 10 6 5/ 0.7 50 GON Collada de Aralla, León (Astronomical twilight. Altitude 19°.) 2024 7 31.910 M 7.2 HI 8.0B 15 5 6 0.5 70 BOU Sint Annen (Comet altitude 14.7° with Sun at -14.9°. Very faint gastail visible.) 2024 7 30.916 M 7.2 HI 8.0B 15 4.5 5/ 0.5 65 BOU Zuidwolde (Comet altitude 13.9° with Sun at -15.3°. Very faint gastail visible.) 2024 7 30.90 S 7.2 TK 8.0B 15 & 6 5 SCH Eerbeek (Altitude comet 16°, altitude Sun -15°. Comparision stars at same altitude as comet. Hint of tail in p.a. 60 deg.) 2024 7 30.895 S 7.5 TK 8.0B 12 4.0 6 0.1 LOO Genk 2024 7 29.922 M 7.1 HI 8.0B 15 4.5 6 BOU Zuidwolde (Comet altitude 13.2° with Sun at -15.6°.) 2024 7 29.921 S 7.2 TK 8.0B 15 6 6 DIJ Burlage (Short tail visible.) 2024 7 29.90 S 7.1 TK 8.0B 15 & 6 5 SCH Eerbeek (Altitude comet 16°, altitude Sun -14°. Comparision stars at same altitude as comet. Hint of tail in p.a. 70 deg.) 2024 7 29.892 S 7.6 TK 8.0B 12 3.5 5 0.1 LOO Genk 2024 7 28.922 S 7.1 TK 8.0B 15 6 5/ DIJ Burlage 2024 7 28.92 S 7.1 HD 10.0B 20 4 5 GOI Araçatuba (Comet altitude 9°, Sun altitude -13°.) 2024 7 28.916 M 7.1 HI 8.0B 15 4 5/ 0.5 65 BOU Zuidwolde (Comet altitude 14.4° with Sun at -14.8°. Very faint gastail visible.) 2024 7 28.91 S 7.1 TK 8.0B 15 & 7 5 SCH Eerbeek (Altitude 14°. Comparision stars near comet. End of twilight, altitude Sun -16°.) 2024 7 26.913 M 7.0 HI 8.0B 15 4.5 5/ BOU Zuidwolde (Comet altitude 15.5° with Sun at -14.0°. Observed shortly after moonrise.) 2024 7 24.917 S 6.8 HI 8.0B 15 5 4/ BOU Zuidwolde (Comet altitude 15.2° with Sun at -14.0°. Moon low in the East hidden behind trees.) 2024 7 24.908 S 7.2 TK 8.0B 15 4 6 DIJ Burlage 2024 7 24.90 S 6.4 TK 5.0B 10 5 5/ 0.6 50 GON Alto del Castro - Aralla, León (Astronomical twilight. Altitude 20°.) 2024 7 23.92 S 6.9 TK 8.0B 15 & 5 5 SCH Eerbeek (Altitude 15°. Comparision stars near comet. Twilight [altitude Sun -15°]. Moon low above opposite horizon [nearly Full Moon].) 2024 7 18.934 S 6.5 TK 8.0B 15 5 6 DIJ Burlage (Moonlight.) 2024 7 17.919 S 6.5 TK 8.0B 15 6 6 DIJ Burlage (Moonlight.) 2024 7 14.917 S 6.6 TK 8.0B 15 5 5/ DIJ Burlage (Moonlight.) 2024 7 13.95 S 6.6 TK 8.0B 15 5 6 SCH Eerbeek (Hazy/twilight. Altitude Sun –15°, altitude comet 11°. Comparision stars nearby.) 2024 7 6.944 S 6.5 TK 8.0B 15 4 6 DIJ Burlage 2024 7 6.892 S 7.2 TK 10.0B 14 2.5 5 0.25 LOO Genk 2024 7 4.939 S 6.4 TK 8.0B 15 7 6 DIJ Burlage 2024 7 1.91 S 6.1 TK 5.0B 10 5 5/ 0.8 50 GON Alto del Castro - Aralla, León (Astronomical twilight. Altitude 17°.) 2024 6 28.95 S 6.8 TK 20.0L 42 & 3 6 SCH Eerbeek (Grey nights/twilight. Altitude Sun –14°, altitude comet 11°. Comparision stars nearby.) 2024 6 25.944 S 6.6 TK 8.0B 15 5 5/ DIJ Burlage 2024 6 25.910 S 6.9 TK 10.0B 14 2 5 LOO Genk 2024 6 24.965 S 6.7 HI 8.0B 15 4.5 4 BOU Zuidwolde (Moon 3.7° up over SE horizon. Comet altitude 9.7° with Sun at -13.1°.) 2024 6 24.937 S 6.6 TK 8.0B 15 6 5 DIJ Burlage (Moonlight.) 2024 6 24.92 S 6.9 TK 20.0L 42 & 2 6 SCH Eerbeek (Grey nights/twilight. Altitude Sun –12°, altitude comet 14°. Comparision stars nearby.) 2024 6 24.90 S 6.2 TK 5.0B 10 4 5/ 0.4 50 GON Saelices de Mayorga, Valladolid (Astronomical twilight. Altitude 15°.) 2024 6 22.962 S 6.9:TK 8.0B 15 5 DIJ Burlage (Moonlight.) 2024 6 22.92 S 6.8 TK 20.0L 42 & 2 6 SCH Eerbeek (Grey nights/twilight. Altitude Sun –12°, altitude comet 13°. Comparision stars nearby.) 2024 6 17.955 S 6.8 TK 8.0B 15 6 5 DIJ Burlage (Moonlight.) 2024 6 16.941 S 6.6 TK 8.0B 15 6 5 DIJ Burlage (Moonlight.) 2024 6 15.955 S 6.8 TK 8.0B 15 5 4 DIJ Burlage (Moonlight.) 2024 6 10.92 S 6.6 TK 5.0B 10 5 5/ GON Cueto Rosales, León 2024 6 10.91 S 6.7 TK 7.0B 15 5 5 GON Cueto Rosales, León (Astronomical twilight. Altitude 10°.) 2024 6 8.949 S 7.5 HI 25.4J 58 3 4/ DIJ Burlage 2024 6 8.948 S 7.5 HI 25.4J 58 3 4 BOU Burlage, Germany (Comet easily located near a magn. 6.9 star in strong twilight. Altitude 7.5° with Sun at -13.4°.) 2024 6 8.93 S 7.2 TK 20.0L 42 2 7 SCH Eerbeek (Grey night/twilight. Altitude Sun –13°. Altitude comet 9°.) 2024 6 5.93 S 7.8:TK 20.0L 42 & 3 7 SCH Eerbeek (Grey night/twilight. Altitude Sun –13°. Altitude comet 9°.) 2024 6 1.91 S 7.2 TK 7.0B 15 4 5/ GON Cueto Rosales, León (Nautical twilight. Altitude 10°.) 2024 5 29.91 S 7.7 TK 7.0B 15 3 6 GON Santiago Millas, León 2024 5 29.90 S 8.2 TK 20.3T 77 3 5 GON Santiago Millas, León (Nautical twilight. Altitude 10°.) 2024 5 11.894 S 8.3 TA 15.5L 36 5 3 DIJ Burlage 2024 5 11.892 M 8.2 TA 15.5L 36 4 6 BOU Burlage, Germany (Some moonlight. Twilight with Sun at -14.0°. Altitude comet 7.9°.) 2024 5 6.89 S 8.5 TK 20.3T 77 2.5 5 GON Santiago Millas, León 2024 5 4.45 S 9.3 TJ 40.0L 75 2.0 5/ YOS Kita-karuizawa, Gunma 2024 5 3.45 S 8.9 TJ 40.0L 75 3.3 5 YOS Kita-karuizawa, Gunma (Very bright.) 2024 5 1.92 S 8.7 TK 10.0B 20 3 4/ GOI Araçatuba 2024 4 12.86 S 9.2 TK 8.0B 20 3 3 GON Collada de Aralla, León 2024 4 11.37 M 9.8 TK 25.0L 40 5.1 6 WYA Walcha, NSW (Low altitude 8.4°. Enhances in Swan Band filter. Opaque inner coma, faint stellar pseudo-nucleus visible, extended outer coma.) 2024 4 8.89 S 9.5 TK 20.3T 77 3 3/ GON Santas Martas, León 2024 3 21.46 S 11.9 TA 40.0L 144 1 3 YOS Mt. Tsukuba, Ibaraki (Looks faint due to moonlight and low sky dim.) 2024 3 12.41 M 11.1 AQ 40.0L 59 3.3 4 WYA Walcha, NSW (Opaque centre. Enhances slightly in Swan Band filter.) 2024 3 8.833 S 11.3 AQ 25.4J 72 1.3 3 DIJ Burlage 2024 3 8.831 S 11.2 AQ 25.4J 72 2.5 2 BOU Burlage, Germany 2024 3 7.41 M 11.3 AQ 40.0L 59 3.2 5/ WYA Walcha, NSW (Opaque inner coma, extended outer coma.) 2024 3 5.84 S 10.9 TK 20.3T 77 3.5 3 GON Alto del Trichero, León 2024 3 5.41 M 11.4 AQ 40.0L 59 3.4 6 WYA Walcha, NSW (Enhances slightly in Swan Band filter. Outer coma transparent and extended.) 2024 2 13.45 M 13.0 AQ 40.0L 108 1.3 4 WYA Walcha, NSW (Faint star in coma. Coma diffuse.) 2024 2 12.42 S[13.0 TA 40.0L 257 !0.5 YOS Mt. Hanadate, Ibaraki (Not visible.) 2024 2 1.44 M 13.9 AQ 40.0L 108 1.0 5/ WYA Walcha, NSW (Diffuse, transparent outer coma. Faint stellar pseudo-nucleus visible in good seeing.) 2024 2 2.43 M 13.7 AQ 40.0L 108 1.3 4/ WYA Walcha, NSW (Opaque centre. Close to star.)