Author/Authors :
Hergenrother، نويسنده , , Carl W. and Mueller، نويسنده , , Beatrice E.A. and Campins، نويسنده , , Humberto and Samarasinha، نويسنده , , N.H. and McCarthy Jr.، نويسنده , , Donald W.، نويسنده ,
Abstract :
Near-simultaneous R- and J-band photometric measurements of the short-period Comets 2P/Encke and the Deep Impact mission target 9P/Tempel 1 were obtained. The resulting R – J colors are + 0.82 ± 0.08 mag and + 1.46 ± 0.13 mag for Encke and Tempel 1, respectively. Tempel 1ʹs color is redder than the solar R – J color index of +0.76. The Tempel 1 observations directly detected the nucleus while the Encke observations likely suffered from coma contamination.
