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Discovery of Activity on Main-belt Asteroid 6993 (1995 BJ4)

  • Authors: Erin M. Clark, David E. Trilling, Revanth Munugala, Michael S.P. Kelley, Henry Hsieh, Michael Gowanlock, Andrew McNeill, Savannah Chappus, Maria Chernyavskaya, Graceson Mule, Gunnar Johnson, Daniel Kramer

Erin M. Clark et al 2026 The Astrophysical Journal Letters 1011 .

  • Provider: AAS Journals

Caption: Figure 1.

(Top row) ZTF alert stamps for asteroid 6993 from UT 2026 June 25 through UT 2026 August 5. The exposure on the right on UT 2026 August 5 was the one identified by our CNN. The ZTF pixel scale is 1﹩\mathop{.}\limits^{{\unicode{x02033}}}﹩0 pixel−1. (Bottom row) ATLAS Mauna Loa Observatory exposures for asteroid 6993 on UT 2026 June 25 and UT 2026 July 25. Images were taken with the 0.5 m Wright–Schmidt Telescope, with a pixel scale of 1﹩\mathop{.}\limits^{{\unicode{x02033}}}﹩860 pixel−1. (Top and bottom rows) Antisolar (yellow) and antivelocity (red) position angles overlap and align with the direction of the visible tail in each exposure, oriented southwest. The directions of north and east are indicated in each panel by white arrows, and the position angles extend at arbitrary lengths to show that they overlap.

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