Size and shape of (11351) leucus from five occultations

Article


Buie, Marc W., Keeney, Brian A., Strauss, Ryder H., Blank, Ted E., Moore, John G., Porter, Simon B., Wasserman, Lawrence H., Weryk, Robert J., Levison, Harold F., Olkin, Catherine B., Leiva, Rodrigo, Bardecker, Jerry E., Brown, Michael E, Brown, Lilah B, Collins, Michael P., Davidson, Hugh M., Dunham, David W., Dunham, Joan B., Eaccarino, John A., ..., Zhang, Qicheng. 2021. "Size and shape of (11351) leucus from five occultations." The Planetary Science Journal. 2 (5), pp. 1-38. https://doi.org/10.3847/PSJ/ac1f9b
Article Title

Size and shape of (11351) leucus from five occultations

ERA Journal ID214329
Article CategoryArticle
AuthorsBuie, Marc W., Keeney, Brian A., Strauss, Ryder H., Blank, Ted E., Moore, John G., Porter, Simon B., Wasserman, Lawrence H., Weryk, Robert J., Levison, Harold F., Olkin, Catherine B., Leiva, Rodrigo, Bardecker, Jerry E., Brown, Michael E, Brown, Lilah B, Collins, Michael P., Davidson, Hugh M., Dunham, David W., Dunham, Joan B., Eaccarino, John A., Finley, Tiffany J., Fuller, Lindsay, Garcia, Maria L., George, Tony, Getrost, Kai, Gialluca, Megan T., Givot, Rima M., Gupton, David, Hanna, William H., Hergenrother, Carl William, Hernandez, Yamir, Hill, Bryan, Hinton, P. C., Holt, Timothy R., Howell, Robert R., Jewell, Jack Lee, Kamin, Roxanne L., Kammer, Joshua A., Kareta, Theodore, Kayl, Gregory J., Keller, John M., Kenyon, David A., Kester, Scott R. II, Kidd, John N. Jr., Lauer, Tod R., Leung, Cecilia W. S., Lorusso, Zoey R., Lundgren, Christopher B., Magana, Lizeth O., Maley, Paul D., Marchis, Franck, Marcialis, Robert L., McCandless, Andrew E., McCrystal, Delsie Joy, McGraw, Allison Marie, Miller, Kelly E., Mueller, Beatrice E. A., Noonan, J. W., Olsen, Aart M., Patton, Alexander R., O’Conner Peluso, Daniel, Person, Michael J., Rigby, James G., Rolfsmeier, Alex D., Salmon, Julien J., Samaniego, Joseph, Sawyer, R. P., Schulz, David M., Skrutskie, Michael F., Smith, Rose J. C., Spencer, John R., Springmann, Alessondra, Stanbridge, Dale R., Stoffel, Timothy J., Tamblyn, Peter, Tobias, Bryan, Verbiscer, Anne J., von Schalscha, Michael P., Werts, Holly and Zhang, Qicheng
Journal TitleThe Planetary Science Journal
Journal Citation2 (5), pp. 1-38
Article Number202
Number of Pages38
Year2021
PublisherAmerican Astronomical Society
Place of PublicationUnited States
ISSN2632-3338
Digital Object Identifier (DOI)https://doi.org/10.3847/PSJ/ac1f9b
Web Address (URL)https://iopscience.iop.org/article/10.3847/PSJ/ac1f9b
Abstract

We present observations of five stellar occultations for (11351) Leucus and reports from two efforts on (21900) Orus. Both objects are prime mission candidate targets for the Lucy Discovery mission. Combined results for Leucus indicate a very dark surface with pV = 0.037 ± 0.001, which is derived from the average of the multichord occultations. Our estimate of the triaxial ellipsoidal shape is for axial diameters of 63.8 × 36.6 × 29.6 km assuming that the spin pole is normal to the line of sight. The actual shape of the object is only roughly elliptical in profile at each epoch. Significant topography is seen with horizontal scales up to 30 km and vertical scales up to 5 km. The most significant feature is a large depression on the southern end of the object as seen from a terrestrial viewpoint. For this work we developed a method to correct for differential refraction, accounting for the difference in color between the target object and the reference stars for astrometry derived from ground-based images.

KeywordsAstrometry (80); Jupiter trojans (874); Unified Astronomy Thesaurus concepts: Stellar occultation (2135)
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020510905. Solar system planetary science (excl. planetary geology)
FunderNational Science Foundation
Byline AffiliationsSouthwest Research Institute, United States
University of Colorado Boulder, United States
Research and Education Collaborative Occultation Network, United States
International Occultation Timing Association, United States
Lowell Observatory, United States
University of Hawaii, United States
California Institute of Technology (Caltech), United States
Polytechnic School, United States
Denver Astronomical Society, United States
University of Texas at San Antonio, United States
Sisters High School, United States
Calipatria High School, United States
University of Arizona, United States
Centre for Astrophysics
University of Wyoming, United States
NSF's National Optical Infrared Astronomy Research Laboratory (NOIRLab), United States
Unistellar, France
SETI Institute, United States
Planetary Science Institute, United States
Massachusetts Institute of Technology, United States
Surprise Valley Joint Unified School District, United States
University of Virginia, United States
Software Bisque, United States
KinetX Aerospace, United States
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