Worldwide photometry and lightcurve observations of 1 Ceres during the 1975–1976 apparition

The size, shape, density, and Albedo of Ceres from its occultation of BD+8°471

“…Note that the rms residual per degree of freedom (see Table III Figure 6. For all practical purposes, this lightcurve is identical to those published by Tedesco et al (1983) from the 1975-76 apparition. The arrow in Figure 6 marks the rotational phase at which the 13 November occultation occurred.…”

“…Taking Ceres' rotational period of 0.37812-±-0.00004 day from Tedesco et al (1983) and the density and mean radius from the present paper, we find the predicted difference between the equatorial radius and the polar radius to be 29 ± 1 km. The observed difference from this paper is 26 ± 5 km, which is consistent with the assumption that Ceres is basically homogeneous (i.e., it is not strongly differentiated) and that its surface has achieved, at least on a global scale, a state of hydrostatic equilibrium.…”

“…Page 16 Based on Ceres' absolute V magnitude of 3-61 from Tedesco et al (1983) and the occultation diameter, the visual geometric albedo of…”

Thermal rotational lightcurve of dwarf-planet (1) Ceres at 235 GHz with the Submillimeter Array

“…Because the shape of Ceres is close to an oblate spheroid Carry et al 2008), those variations are uniquely related to surface properties such as albedo and, at thermal wavelengths, emissivity and thermal inertia. Most V-band lightcurves revealed amplitudes up to 4% (Tedesco et al 1983;Li et al 2006), which can be explained by relatively small albedo variations, as those measured by Li et al (2006) and Carry et al (2008), while the 3 μm lightcurve from Rivkin & Volquardsen (2010) ruled out disk-averaged albedo variations higher than 5% at that wavelength.…”

“…It is also possible to indirectly map Ceres' surface properties by measuring disk-averaged brightness variations during its rotation (∼9.1 h, Tedesco et al 1983;Chamberlain et al 2007). Because the shape of Ceres is close to an oblate spheroid Carry et al 2008), those variations are uniquely related to surface properties such as albedo and, at thermal wavelengths, emissivity and thermal inertia.…”