* * * * * 37P/Forbes * * * * *


Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2018 9 19.06 S 11.0 TK 20.3T 77 7 1 GON Aralla, León (Faint tail difficult to separate from the coma. The bright estimate is related to the 7' observed width of the coma and tail.) 2018 9 17.75 S[13.1 TA 40.0L 257 !0.7 YOS Kita-karuizawa, Gunma 2018 9 16.74 S[13.5 TA 40.0L 257 !0.6 YOS Kita-karuizawa, Gunma 2018 9 9.97 S 11.0 TK 20.3T 77 6 1 GON Aralla, León (Faint tail difficult to separate from the coma. The bright estimate is related to the 6' observed width of the coma and tail.) 2018 8 20.10 S 10.5 TK 20.3T 77 6 1 GON Alto del Castro, León (Observation made under better conditions, providing a wider diameter and brighter magnitude estimate in comparison with my previous Aug. 15 observation. Faint tail difficult to separate from the coma. The bright estimate is related to the 6' observed width of the coma and tail.) 2018 8 15.73 S 13.7 AQ 25.0L 83 1 2/ WYA Walcha, NSW (Difficult. Diffuse with slightly brighter but weakly condensed centre.) 2018 8 15.01 S 11.2 TK 20.3T 100 3 0/ GON Alto del Castro, León 2018 8 10.80 S 13.8 AQ 40.6L 165 1.5 2/ CAM Katherine, NT 2018 8 10.04 S 11.2 TK 20.3T 77 3.5 0/ GON Alto del Castro, León (Very diffuse.) 2018 8 9.81 S 13.8 AQ 40.6L 165 1.5 3 CAM Katherine, NT 2018 8 8.74 S 13.5 AQ 25.0L 83 1.4 2/ WYA Walcha, NSW (Difficult. Very diffuse.) 2018 8 7.80 S 13.5 AQ 40.6L 165 2.0 3/ CAM Katherine, NT 2018 8 6.62 S 13.5 AQ 25.0L 83 2 2/ WYA Walcha, NSW (Difficult, very diffuse, weakly condensed. Visible in periods of good seeing.) 2018 7 23.77 S 13.5 AQ 25.0L 83 1.5 3 WYA Walcha, NSW (Diffuse, slight brightening to centre.) 2018 7 22.82 M 13.6 AQ 40.6L 165 1.5 4 CAM Katherine, NT 2018 7 22.12 S 10.5 TK 20.3T 77 5 1/ GON Quintanilla de los Oteros, León 2018 7 21.80 S 13.6 AQ 40.6L 165 1.5 3 CAM Katherine, NT 2018 7 20.80 S 13.4 AQ 40.6L 165 1.5 3 CAM Katherine, NT 2018 7 18.77 S 13.2 AQ 25.0L 83 1.2 3 WYA Walcha, NSW (Slight interference from star at edge of coma.) 2018 7 18.09 S 11.0 TK 20.3T 77 4 2 GON Alto del Castro, León 2018 7 17.80 S 13.6 AQ 40.6L 165 1.0 3/ CAM Katherine, NT 2018 7 16.79 S 13.4 AQ 40.6L 165 1.5 3 CAM Katherine, NT 2018 7 16.74 S 13.0 AQ 25.0L 83 1.3 2/ WYA Walcha, NSW (Very diffuse, slight brightening to centre.) 2018 7 13.74 S 12.9 AQ 25.0L 83 1.6 3/ WYA Walcha, NSW (Coma diffuse, slight brightening to a weakly condensed opaque centre. Close to faint star.) 2018 7 13.68 S 13.5 TA 40.0L 144 1.0 3 YOS Kita-karuizawa, Gunma (Fainter than expected.) 2018 7 11.75 S 13.5 AQ 25.0L 83 1.3 3 WYA Walcha, NSW (Coma very diffuse, slight brightening to centre.) 2018 7 10.76 S 13.6 AQ 40.6L 165 1.0 3 CAM Katherine, NT 2018 7 10.07 S 10.6 TK 20.3T 77 4 2 GON Alto del Castro, León 2018 7 8.77 M 13.7 AQ 40.6L 165 1.2 3 CAM Katherine, NT 2018 6 24.79 S 13.2 AQ 40.6L 165 2 4 CAM Katherine, NT 2018 6 23.79 S 13.5 AQ 40.6L 165 1.5 4 CAM Katherine, NT 2018 6 23.76 M 12.1 AQ 25.0L 83 1.5 3/ WYA Walcha, NSW (Opaque centre, moderately condensed. Slight interference from mag 13.7 star in southern edge of coma. Does not enhance in Swan Band filter. Visible at 39x but very diffuse.) 2018 6 22.77 M 13.3 AQ 25.0L 83 1.7 5/ WYA Walcha, NSW (Hint of coma extension to the West. Slight interference from mag 13.4 star nearby.) 2018 6 21.78 S 13.6 AQ 40.6L 165 1 3 CAM Katherine, NT 2018 6 19.80 S 13.0 AQ 40.6L 165 2 3/ CAM Katherine, NT 2018 6 19.11 S 10.3 TK 20.3T 77 5 2/ GON Alto del Castro - Aralla, León (Altitude 26°. Beginning of astronomical twilight.) 2018 6 17.79 S 13.0 AQ 40.6L 165 2 2 CAM Katherine, NT 2018 6 17.33 S 12.7:AU 22.0L 160 1 4 GOI Araçatuba (Very near a star of magn. 12.8.) 2018 6 13.76 M 13.0 AQ 25.0L 83 2 3/ WYA Walcha, NSW (Coma diffuse, inner coma opaque and sometimes appears faintly stellar. Faintly visible at 39x and with Neptune in the field.) 2018 6 13.11 S 10.5 TK 20.3T 100 4 2/ GON Pandorado, León (Altitude 21°.) 2018 6 12.74 M 12.7 AQ 25.0L 83 1.7 4 WYA Walcha, NSW (Coma diffuse, centre small and slightly more condensed. Faint extension of coma to the SW approximately.) 2018 6 11.70 M 12.5 AQ 25.0L 83 1.7 5/ WYA Walcha, NSW (Coma diffuse with opaque centre, hint of tail to NW approximately. Central condensation sometimes appears stellar in periods of good seeing. Faintly visible at 39x.) 2018 5 25.73 M 12.7 AQ 25.0L 83 1.7 4 WYA Walcha, NSW (Coma diffuse, slight brightening to centre.) 2018 5 22.73 M 12.6 AQ 25.0L 83 1.5 6 WYA Walcha, NSW (Diffuse coma, faint stellar central condensation, coma extends to WSW approximately.) 2018 5 21.73 M 12.5 AQ 25.0L 83 1.7 6 WYA Walcha, NSW (Faintly stellar, very diffuse. Faint elongation to the WSW approximately.) 2018 5 21.14 S 10.7 TK 20.3T 133 4 2/ GON Alto del Castro - Aralla, León (Observation made under better conditions, from a higher mountain location, providing a wider coma diameter and brighter m1 estimate in comparison with my previous May 16.12 UT observation. Astronomical twilight. Altitude 16°.) 2018 5 19.74 M 12.5 AQ 25.0L 83 1.6 6 WYA Walcha, NSW (Coma very diffuse with faint stellar central condensation. Outer coma appears elongated to the WSW approximately. Does not enhance in Swan Band filter.) 2018 5 18.74 S 12.4 AQ 25.0L 83 1.5 3 WYA Walcha, NSW (Coma diffuse, slight brightening to centre. Sometimes appears to have a faint stellar centre.) 2018 5 16.12 S 11.5 AQ 20.3T 100 1.5 2/ GON Pandorado, León (Altitude 10°.) 2018 5 10.64 S 12.5 AQ 25.0L 83 1.4 2/ WYA Walcha, NSW (Poor seeing. Low altitude 17.8°. Coma very diffuse, weak centre.) 2018 5 9.64 S 12.6 AQ 25.0L 83 1.3 2/ WYA Walcha, NSW (Moonlight interference, elongation 10.6°. Coma diffuse, slightly brighter at centre.) 2018 4 20.71 M 12.7 AQ 25.0L 83 1.1 4 WYA Walcha, NSW (Difficult due to glare from bright star nearby. Small opaque centre, sometimes appears faintly stellar in periods of good seeing. Sky a little hazy due to encroaching fog.) 2018 4 16.75 S 12.6 AQ 25.0L 83 1.8 3/ WYA Walcha, NSW (Coma diffuse, opaque centre visible in periods of good seeing.) 2018 4 15.74 S 12.9 AQ 25.0L 83 1.3 3 WYA Walcha, NSW (Does not enhance in Swan band filter. Coma small with slightly brighter and opaque centre.) 2018 4 14.69 S 13.8 AQ 25.0L 83 1 3 WYA Walcha, NSW (Difficult, coma close to faint stars. Coma circular in shape, slight brightening at centre.) 2018 4 11.68 S 13.6 AQ 25.0L 83 0.8 3 WYA Walcha, NSW (Difficult, very small and faint. Slight moonlight interference, moon altitude 3.2°.)
2005 9 8.46 S 13.0 AU 40.0L 144 1.1 3 YOS Kita-karuizawa, Gunma (Faint diffuse object. Near by the Lagoon Nebula. Background was filled with many faint stars. A 13.5-mag star was overlapping. I could finally see it after several unsuccessful tries.) 2005 8 5.86 S 11.4 TK 40.7L 58 1.6 3 BIV Valdrôme 2005 8 3.86 S 12.2 HS 40.7L 58 1.3 3 BIV Valdrôme 2005 8 2.94 S 12.2 TK 20.3T 160 0.8 3 GON Alto del Castro - Aralla, León (Altitude 8°.) 2005 7 31.86 S 11.8 TK 40.7L 58 1.3 3 BIV Valdrôme 2005 7 29.53 S 12.6 GA 25.4L 71 SEA Cowra, NSW 2005 7 10.905 S 12.1 AU 31.0J 109 1.0 3/ BOU Revest-du-Bion, France 2005 7 10.902 S 12.4 AU 31.0J 109 0.6 1 DIJ Revest-du-Bion, France 2005 7 8.95 S 11.6 TK 20.3T 67 1.5 3 BIV Pico-Veleta, Spain 2005 7 8.899 S 12.0 AU 31.0J 109 1.1 0/ DIJ Revest-du-Bion, France 2005 7 8.898 S 12.3 AU 31.0J 109 0.8 2 BOU Revest-du-Bion, France 2005 7 7.94 S 11.5 TK 20.3T 67 1.7 4 BIV Pico-Veleta, Spain 2005 7 6.906 S 12.4 AU 31.0J 89 0.6 0/ DIJ Revest-du-Bion, France 2005 7 6.899 S 12.2 AU 31.0J 89 0.7 3 BOU Revest-du-Bion, France 2005 7 5.918 S 11.8 AU 31.0J 89 1.0 2/ DIJ Revest-du-Bion, France 2005 7 5.913 S 12.2 AU 31.0J 89 0.7 2 BOU Revest-du-Bion, France 2005 7 4.94 S 11.9 TK 20.3T 67 2.0 3 BIV Pico-Veleta, Spain 2005 7 3.91 S 11.8 TK 20.3T 67 1.5 3 BIV Pico-Veleta, Spain 2005 7 2.94 S 11.7 TK 20.3T 67 1.7 2 BIV Pico-Veleta, Spain 2005 7 1.91 S 11.7 TK 20.3T 67 1.8 4 BIV Pico-Veleta, Spain 2005 6 8.97 S 12.2 TK 20.3T 133 0.7 3 GON Alto del Castro - Aralla, León