The Sizes and Albedos of Centaurs 2014 YY49 and 2013 NL24 from Stellar Occultation Measurements by RECON
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Published:2021-02-01
Issue:1
Volume:2
Page:22
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ISSN:2632-3338
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Container-title:The Planetary Science Journal
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language:
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Short-container-title:Planet. Sci. J.
Author:
Strauss Ryder H.ORCID, Leiva RodrigoORCID, Keller John M.ORCID, Wilde Elizabeth, Buie Marc W.ORCID, Weryk Robert J.ORCID, Kavelaars JJORCID, Bridges Terry, Wasserman Lawrence H.ORCID, Trilling David E.ORCID, Ainsworth Deanna, Anthony Seth, Baker Robert, Bardecker Jerry, Bean James K, Bock Stephen, Chase Stefani, Dean Bryan, Frei Chessa, George Tony, Gill Harnoorat, Gimple H. Wm., Givot Rima, Hopfe Samuel E., Cota Juan M., Kehrli Matthew, King Rebekah, L. Haley Sean, Lara Charisma, Lund Nels, Mattes Martin L., McCandless Keitha, McCrystal Delsie, McRae Josh, Rodriguez Melgarejo Leonardo Emmanuel, Mendoza Paola, Miller Alexandra, Norfolk Ian R., Palmquist Bruce, Reaves Robert D., Rivard Megan L, von Schalscha Michael, Schar Ramsey, Stoffel Timothy J, Swanson Diana J., Thompson Doug, Wise J. A., Woods Levi, Yang Yuehai
Abstract
Abstract
In 2019, the Research and Education Collaborative Occultation Network (RECON) obtained multiple-chord occultation measurements of two Centaur objects: 2014 YY49 on 2019 January 28 and 2013 NL24 on 2019 September 4. RECON is a citizen-science telescope network designed to observe high-uncertainty occultations by outer solar system objects. Adopting circular models for the object profiles, we derive a radius
km and a geometric albedo
for 2014 YY49 and a radius
km and a geometric albedo
for 2013 NL24. To the precision of these measurements, no atmosphere or rings are detected for either object. The two objects measured here are among the smallest distant objects measured with the stellar occultation technique. In addition to these geometric constraints, the occultation measurements provide astrometric constraints for these two Centaurs at a higher precision than has been feasible by direct imaging. To supplement the occultation results, we also present an analysis of color photometry from the Pan-STARRS surveys to constrain the rotational light curve amplitudes and spectral colors of these two Centaurs. We recommend that future work focus on photometry to more deliberately constrain the objects’ colors and light curve amplitudes and on follow-on occultation efforts informed by this astrometry.
Funder
National Science Foundation
Publisher
American Astronomical Society
Subject
Space and Planetary Science,Earth and Planetary Sciences (miscellaneous),Geophysics,Astronomy and Astrophysics
Cited by
3 articles.
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