723 Hammonia

Minor planet orbiting the Sun

723 Hammonia is a minor planet orbiting the Sun. It was discovered in 1911 and is named after the city of Hamburg.[2] Although the name alludes to Hamburg it was discovered in Vienna.[3] (Vienna is the capital of Austria)

The asteroid was discovered by the noted and prolific astronomer Johann Palisa.[4] He worked from Pola early in his career and later from Vienna observatories.[5] The same night he discovered Hammonia, he also discovered 724 Hapag and 725 Amanda.[6] He discovered dozens and dozens of asteroids between 1874 and 1923, ranging from 136 Austria to 1073 Gellivara.[7]

As seen from a certain area on Earth, 723 Hammonia occulted the star 3UC149-190572 on June 3, 2013.[8]

In 2014 it was noted to have a high-albedo and amorphous Mg pyroxenes was suggested as a possible reason for this.[9]

See also

  • 449 Hamburga (another asteroid named after Hamburg)
  • Vienna Observatory

References

  1. ^ "723 Hammonia (1911 NB)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
  2. ^ (723) Hammonia
  3. ^ (723) Hammonia
  4. ^ "Johann Palisa, the most successful visual discoverer of asteroids" (PDF). Archived from the original (PDF) on 28 September 2007. Retrieved 31 August 2015.
  5. ^ "Johann Palisa, the most successful visual discoverer of asteroids" (PDF). Archived from the original (PDF) on 28 September 2007. Retrieved 31 August 2015.
  6. ^ "Johann Palisa, the most successful visual discoverer of asteroids" (PDF). Archived from the original (PDF) on 28 September 2007. Retrieved 31 August 2015.
  7. ^ "Johann Palisa, the most successful visual discoverer of asteroids" (PDF). Archived from the original (PDF) on 28 September 2007. Retrieved 31 August 2015.
  8. ^ OCULTACION 3UC149-190572 POR 723 HAMMONIA 2013-06-03
  9. ^ High-albedo C-complex outer-belt asteroids: The near-infrared spectra

External links

  • 723 Hammonia at AstDyS-2, Asteroids—Dynamic Site
    • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
  • 723 Hammonia at the JPL Small-Body Database Edit this at Wikidata
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters
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  • 722 Frieda
  • 723 Hammonia
  • 724 Hapag
Authority control databases Edit this at Wikidata
  • JPL SBDB
  • MPC


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