531 new spectroscopic redshifts from the CDFS and a test on the cosmological relevance of the GOODS-South field
532 Herculina
532 Herculina, A Differentiated Asteroid with Two Maria
532 Herculina, a Spherical Asteroid with Two Dark Regions
53Mn-53Cr Chronometry of Cb Chondrite: Evidence for Uniform Distribution of 53Mn in the Early Solar System
54 Cam - A new variable star
5424 Covington = 1983 TN1
546 precise astrometric positions of minor planets obtained at the GPO telescope of ESO - La Silla.
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
55 UMa spectroscopic orbit (Horn+, 1996)
557 GHz Observations of Water Vapor Outflows from VY CMa and W Hydrae
55Fe in Supernova 1987A
563 Camelopardalis and the transverse Zeeman effect in Hbeta .
56Co gamma-rays from SN1998bu: COMPTEL upper limits
56Fe(νe, e-)56Co:. A Technique for an Accurate Cross Section Measurement at ORLaND
56Ni dredge-up in Supernova 1987A