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Unexpected planets beyond Pluto

Unexpected planets beyond Pluto their discovery, physical properties, and implications for solar system history. David Rabinowitz Yale University, Center for Astronomy and Astrophysics Yale: Charles Baltay, Nancy Ellman, Will Emmet, Tom Hurteau, Rochelle Lauer, Suzanne Tourtellote

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Unexpected planets beyond Pluto

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  1. Unexpected planets beyond Pluto their discovery, physical properties, and implications for solar system history David Rabinowitz Yale University, Center for Astronomy and Astrophysics Yale: Charles Baltay, Nancy Ellman, Will Emmet, Tom Hurteau, Rochelle Lauer, Suzanne Tourtellote Indiana University: Jim Musser, Brice Adams, Mark Gebhard Caltech: Michael E. Brown, Kristina Barkume, Henry Roe, A.H. Bouchez, R. Sari, M. van Dam, R. Campbell, J. Chin, S. Hartman, E. Johansson, R. Lafon, D. LeMignant, P. Stomski, D. Summers, P. Wizinowich Gemini Observatory : Chad Trujillo

  2. 2005 FY9 “Easter Bunny” 2003 EL61 “Santa” 2003 UB313 “Xena” Sedna Orcus Pluto (2200 km) Quaoar

  3. Saturn Uranus Neptune

  4. Saturn Uranus Neptune ecliptic plane

  5. “Xena” 2005, 48” Sedna 2004, 48” Kuiper Belt Jewitt, Luu 1992, 86” Uranus Herschel, 1781, 6” Pluto Tombaugh, 1930, 13” Neptune Le Verrier, Galle 1846, 9”

  6. Beta Pictoris

  7. AU Mic H-band imaging with Keck Adaptive Optics (0.04” seeing) M. Liu, Science 303, 2004

  8. Where did the mass go ? (0.1 earth mass)

  9. Clyde Tombaugh - 1938

  10. The reflectance spectrum of 2003 UB313

  11. Possible Sizes for “Xena”

  12. Keck discovery of Xena’s moon, “Gabrielle”

  13. Keck Laser Guide Star Observations Easter Bunny Charon Rudolph Xena Gabrielle Santa

  14. Gabrielle Xena Xena Gabrielle Xena-Gabrielle to Earth-moon Moon Earth

  15. Santa (2003 EL61) a squashed planet

  16. Satellite Discovered around 2003 EL61 (“Santa”) “Santa” “Rudolph”

  17. v2/r = MG/r2 M = 4.21x1021 kg Rudolph’s orbit Radius: 49,000 km Period: 49 days

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