545 Messalina CCD Spectrum

546 precise astrometric positions of minor planets obtained at the GPO telescope of ESO - La Silla.

5467 1988AG CCD Spectrum

547 Praxedis Average CCD Spectrum

5482 1990DX CCD Spectrum

5485 Kaula CCD Spectrum

5492 Thoma CCD Spectrum

54alexandra

54alexandra1

54alexandra2

54alexandra3

54Cr Anomalies in the Solar System: Their Extent and Origin

54Cr Anomalies in the Tagish Lake and Orgueil Carbonaceous Chondrites

54Cr Isotopic Anomalies in the Tagish Lake and Orgueil Carbonaceous Chondrites

55 Cancri: A Coplanar Planetary System that is Likely Misaligned with its Star

55 Cancri: A Coplanar Planetary System that is Likely Misaligned with its Star

55 Cancri: A Laboratory for Testing Numerous Conjectures about Planet Formation

55 Cancri: Stellar Astrophysical Parameters, a Planet in the Habitable Zone, and Implications for the Radius of a Transiting Super-Earth

55 ma: Separation of a spectroscopic triple system

55 New Compact Groups in the Southern Sky from an Automated Search