10 th planet has a Moon Jadwiga DaszyskaDaszkiewicz
- Slides: 12
10 th planet has a Moon Jadwiga Daszyńska-Daszkiewicz Instytut Astronomiczny, UWr. 28 October 2005, Journal Club
July 30, 2005 - an object larger than Pluto has been discovered in the Kuiper belt Team: Mike Brown (Caltech), Chad Trujillo (Gemini Obs. ) David Rabinowitz (Yale Uni. ) Samuel Oschin Telescope at Palomar Observatory (48 -inch) Brown, Trujillo, Rabinowitz , , Discovery of the planetary-sized object in the scattered Kuiper belt’’ astro-ph/0508663, submitted to Ap. JL, August 30, 2005 2003 UB 313
BASIC CHARACTERISTICS OF 2003 UB 313 the largest known object in orbit beyond Neptun the most distant object yet seen in the Solar System 4 th brightest KBO i = 43 o. 993 0. 001 , e = 0. 4378 0. 0001 currently near aphelion at 97. 5 0. 01 AU spectrum dominated by absorption due to methane
The orbit of 2003 UB 313 Basic characteriscts of 2003 UB 313
Relative reflectance of 2003 UB 313
September 10, 2005 - moon discovered orbiting 10 th planet October 3, 2005 – the press announcement team of Mike Brown , , Satellites of the largest Kuiper belt object’’ Brown et al. , submitted to Ap. JL, October 2, 2005 Keck II Telescope, Laser Guide Star Adaptive Optics system S/2005 (2003 UB 313) 1
LASER GUIDE STAR ADAPTIVE OPTICS SYSTEM - allows to measures and correct for the aberrations of starlight - works similarly to natural guide star - instead of a natural bright star uses 589 nm laser light
Images of the four brightest KBO from Keck LGS AO
Keck Observatory image of 2003 UB 313 and S/2005
Basic characteristics of S/2005 fractional brightness of satellite 0. 02 apparent semi-major axis 0. 53’’ true semi-major axis 36000 km orbital period 14 days
Relative sizes and separations of 2003 UB 313 and S/2005
Why is the discovery of the moon important ? MASS OF THE 10 th PLANET THE HISTORY OF THE SOLAR SYSTEM
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