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Tryggvadóttir

MESSENGER image, with Tryggvadóttir in lower left and Tolkien at center
Planet	Mercury
Coordinates	89°33′N 171°34′W / 89.55°N 171.56°W / 89.55; -171.56
Quadrangle	Borealis
Diameter	31 km
Eponym	Nína Tryggvadóttir

Tryggvadóttir is a crater on Mercury. The north pole of Mercury is located next to its northern rim. It was named by the IAU in 2012 after the Icelandic artist Nína Tryggvadóttir.

All but the rim of the crater is in permanent shadow. S band radar data from the Arecibo Observatory collected between 1999 and 2005 indicates a radar-bright area covering the entire floor of Tryggvadóttir, which is probably indicative of a water ice deposit.

Tryggvadóttir is adjacent to the larger Tolkien crater and to Chesterton crater.

References

1. "Tryggvadóttir (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
2. Chabot, N. L., D. J. Lawrence, G. A. Neumann, W. C. Feldman, and D. A. Paige, 2018. Mercury's Polar Deposits. In Mercury: The View After MESSENGER edited by Sean C. Solomon, Larry R. Nittler, and Brian J. Anderson. Cambridge Planetary Science. Chapter 13, Figure 13.2.
3. PIA19411: Water Ice on Mercury, NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
4. John K. Harmon, Martin A. Slade, Melissa S. Rice, 2011. Radar imagery of Mercury’s putative polar ice: 1999–2005 Arecibo results. Icarus, 211, p37-50. doi.org/10.1016/j.icarus.2010.08.007

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