Publication

Spectra of 5261 Eureka and its family: meteorite spectral analogues of asteroidal and planetary origin

Lim, L. F., Emery, J. P., Mueller, M., Rivkin, A. S., Thomas, C. A. & Trilling, D. E., 2017, In : Bulletin of the American Astronomical Society. 49

Research output: Contribution to journalMeeting AbstractAcademic

  • Lucy F. Lim
  • Joshua P. Emery
  • Michael Mueller
  • Andrew S. Rivkin
  • Cristina A. Thomas
  • David E. Trilling
The Mars trojan asteroid (5261) Eureka is now known to be the largest member of a dynamical family whose near-IR spectra are dominated by the 1-micron band of olivine (Christou et al. 2013, Ćuk et al. 2015, Borisov et al. 2017, Christou et al. 2017). Recently, Polishook et al. (2017) have suggested that the olivine-dominated spectra of Eureka and two of its family members imply an achondritic composition, which forms an important part of their argument that these objects originated in the Martian mantle. However, we note that the olivine-rich composition of Eureka and its family members is consistent not only with achondrites of planetary origin, but also with achondrites of asteroidal origin such as brachinites and indeed with the R chondrites (e.g. Lim et al. 2011, Sanchez et al. 2014). The Spitzer IRS spectrum of 5261 Eureka will be discussed together with the extant near-IR spectra from the Eureka family in the context of candidate meteorite analogues and their laboratory spectra.
Original languageEnglish
JournalBulletin of the American Astronomical Society
Volume49
Publication statusPublished - 2017

ID: 53383553