Science 28Feb2020
with that of other KBOs and related populations. Arrokoth’s color slope is consistent with other CCKBOs ( 8 ). It is less red th ...
range, so it cannot be specifically identified. Any dark, spectrally neutral material would be equally consistent with the data. ...
using procedures developed earlier in the mission, accounting for the solid angle sub- tended by Arrokoth within the antenna bea ...
that region is slight, about 0.5 K. Figure 7D shows the predicted observable surface tem- perature at the time of the New Horizo ...
portions. Simulations of protoplanetary disks indicate that methanol can be produced in this way (consuming CO) on time scales o ...
distinct from those of planetesimals that formed closer to the Sun. A contrast in planetesimal composition driven by nebular che ...
G. L. Tyleret al., The New Horizons radio science experiment (REX).Space Sci. Rev. 140 , 217–259 (2008). doi:10.1007/ s11214-00 ...
ACKNOWLEDGMENTS We gratefully thank the many hundreds of people who worked together on the New Horizons team. Their hard work en ...
RESEARCH ARTICLE SUMMARY ◥ OUTER SOLAR SYSTEM The solar nebula origin of (486958) Arrokoth, a primordial contact binary in the K ...
RESEARCH ARTICLE ◥ OUTER SOLAR SYSTEM The solar nebula origin of (486958) Arrokoth, a primordial contact binary in the Kuiper Be ...
two-body collisions lead to the gradual accre- tion of larger and larger objects (supplemen- tary text) ( 27 , 28 ). Dynamic cha ...
strength of 100 Pa and cohesion of 1 kPa (im- plying a frictional, bulkcompressive strength of ~3 kPa) ( 34 ), the bulk density ...
formation. This code uses a discrete element method to model the collisions of granular ag- gregates at slow speeds and low ener ...
likely the result of the low-velocity merger of two bodies that were already gravitationally bound. Binary formation scenarios W ...
and determined the obliquity of the corre- sponding angular momentum vectors. The total angular momentum stored in a particle cl ...
theaaxis of SL must lie within 5° of the long axis of the body as a whole (10/180 = 0.056). The joint probability of both aligni ...
1750 kg m−^3 , assuming a satellite orbital radius of 4 primary radii and a primary orbit at 1 AU ( 76 ). Scaling that result to ...
more than 10 million years ( 90 , 91 ), so it may seem that ambient gas had little effect on Arrokoth’s later evolution. The gas ...
J. R. Spenceret al., The geology and geophysics of Kuiper Belt object (486958) Arrokoth.Science 367 , eaay3999 (2020). W. M. Gr ...
eccentricity as the binary orbit expands, which has been questioned ( 67 ). O. Golubov, Yu. N. Krugly, Tangential component of ...
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