Photometric light curve for the kuiper belt object 2000 EB173 on 78 nights

Document Type


Publication Date



Kuiper belt objects (KBOs) are generally very faint and cannot in practice be monitored with a well-sampled long-term light curve; so our discovery of the bright KBO 2000 EB173 offers an excellent opportunity for synoptic studies. We present a well-sampled photometric time series (77 R and 29 V magnitudes on 78 nights) over a 225-day time span centered on the 2001 opposition. The light curve (corrected to the year 2001 opposition distance) varies from 19.11 to 19.39 mag with a single peak that is smooth, time symmetric, and coincident with opposition. All variations in the light curve are consistent with a linear opposition surge (ROPP = 19.083 + 0.125 * α, where α is the solar phase angle), while any rotational modulation must have a peak-to-peak amplitude of less than 0.097 mag. This is the first measured opposition surge for any KBO (other than Pluto). The V - R color is 0.63 ± 0.02, with no apparent variation with phase at the few percent level. With R = 19. 11 at opposition, 2000 EB173 remains the brightest known KBO and a prime target for future photometric and spectroscopic studies. © 2002 Elsevier Science (USA).

Publication Source (Journal or Book title)


First Page


Last Page


This document is currently not available here.