* * * * * 117P/Helin-Roman-Alu 1 * * * * *

Year Mn Day    MM  Mag Ref Scope Pwr coma  DC tail p.a. Obs  Site
2006  8 22.67   S 13.7 AU  40.0L 144  0.9  5            YOS  Kita-karuizawa, Gunma
(Unexpectedly, it was clearly visible with an excellent clear sky.
It is brighter than expected! Moderately condensed.)
2005  7 10.951  S 13.8 AU  31.0J 155  0.6  1            DIJ  Revest-du-Bion, France
2005  7 10.911  S 13.8 AU  31.0J 155  0.6  4            BOU  Revest-du-Bion, France
2005  7  8.917  S 13.8 AU  31.0J 155  0.6  4            DIJ  Revest-du-Bion, France
2005  7  8.913  S 13.8 AU  31.0J 155  0.5  5            BOU  Revest-du-Bion, France
2005  7  5.932  S 13.6 AU  31.0J 155  1.0  0/           DIJ  Revest-du-Bion, France
2005  7  5.928  S 13.8 AU  31.0J 155  0.6  4            BOU  Revest-du-Bion, France
2005  7  3.908  S 13.4 AU  31.0J 155  0.7  4            DIJ  Revest-du-Bion, France
2005  7  3.906  S 13.7 AU  31.0J 155  0.5  4            BOU  Revest-du-Bion, France
2005  6  6.55   S[13.0 AU  40.0L 144 !0.9               YOS  Gunma, Japan
(Not visible. I felt something visible near by the position, but I found there are two 14.5 mag stars.)
2005  5  7.11   S 14.3 HS  20.3T 160  0.6  6            GON  Sierra del Aramo, Asturias
(Mountain location, very clear sky. Limiting star magnitude near 117P: 15.5.)