Monthly Archives: January 2016


Haumea, minor-planet designation 136108 Haumea, is a dwarf planet located beyond Neptune’s orbit.[21] It was discovered in 2004 by a team headed by Mike Brown of Caltech at the Palomar Observatory in the United States and independently in 2005, by a team headed by José Luis Ortiz Moreno at the Sierra Nevada Observatory in Spain, though the latter claim has been contested. On September 17, 2008, it was recognized as a dwarf planet by the International Astronomical Union (IAU) and named after Haumea, the Hawaiian goddess of childbirth.


Using the data from the above source yields a rotational speed of                                                   2 π r1 / t = 2 x 3.14 x 5.0×107 cm / 1.4 x 104 sec = 2.0 x 104 cm/sec.

Its orbital speed is given to be 4.5 x 105 cm/sec.

vg = ( Gm/r )½ = ( 6.67x 10-8 cm3/g sec x 4.0x1024g / 7.0×107 cm )½ = 6.2×104 cm/sec

Might this figure had been the ‘original’ rotational speed of Haumea which transferred some of its energy over time to gravitational influences and frictional sources?

This figure is within a factor of ten of the orbital speed.

Although Haumea is treated as a sphere to reach this figure for vg it is actually ellipsoidal.