475 Ocllo is a large Mars-crossing asteroid. It was discovered by American astronomer DeLisle Stewart on August 14, 1901 and was assigned a provisional name of 1901 HN.
521 Brixia is a relatively large minor planet, specifically an asteroid orbiting mostly in the asteroid belt that was discovered by American astronomer Raymond Smith Dugan on January 10, 1904. The name derives from Brixia, the ancient name of the Italian city of Brescia.
523 Ada is a minor planet orbiting the Sun. It was discovered January 29, 1904, by American astronomer Raymond S. Dugan at Heidelberg, Germany and was named after his friend Ada Helme. CCD images collected during the fall of 2004 at Oakley Observatory in Terre Haute, Indiana, were used to generate a lightcurve for the object, showing a rotation period of 10.03 ± 0.01 hours.
526 Jena is a Themistian asteroid. It was discovered in Heidelberg by the German astronomer Max Wolf on 14 March 1904 and named after the city of Jena.
527 Euryanthe is a minor planet orbiting the Sun. It was discovered in 1904 by Max Wolf and named after the heroine of the opera Euryanthe by the German composer Carl Maria von Weber.
533 Sara is a minor planet orbiting the Sun.
534 Nassovia is a minor planet orbiting the Sun. It is a member of the Koronis family of asteroids.
537 Pauly is a minor planet orbiting the Sun.
539 Pamina is a minor planet orbiting the Sun in the main belt. It is named for the heroine of Mozart's opera, The Magic Flute. This asteroid was discovered by M. Wolf in 1904 at the Heidelberg observatory in Germany. It is orbiting at a distance of 2.74 AU from the Sun, with an orbital eccentricity (ovalness) of 0.212 and a period of 4.53 yr. The orbital plane is inclined at an angle of 6.8° to the ecliptic.
541 Deborah is a minor planet orbiting the Sun. It was discovered by Max Wolf on August 4, 1904. The semi-major axis of the orbit lies just inside the 5/2 Kirkwood gap, located at 2.824 AU. It was named after the biblical character Deborah.
542 Susanna is a minor planet orbiting the Sun.
543 Charlotte is a minor planet orbiting the Sun. It was discovered by Paul Götz on September 11, 1904, in Heidelberg.
544 Jetta is a minor planet orbiting the Sun. It is estimated to be 24 km in diameter.
545 Messalina is a minor planet, specifically an asteroid orbiting primarily in the asteroid belt. It was discovered on 3 October 1904 by Paul Götz, at Heidelberg. It is named after Valeria Messalina, the third wife of Roman Emperor Claudius.
548 Kressida is a minor planet orbiting the Sun. This object was discovered by German astronomer Paul Götz in 1904. It is named after the theatrical character Cressida. This stony S-type asteroid is orbiting at a distance of 2.28 AU from the Sun, with an orbital eccentricity (ovalness) of 0.185 and a period of 3.45 yr. The orbital plane is inclined at an angle of 3.87° to the ecliptic.
549 Jessonda is a minor planet orbiting the Sun. According to the Catalogue of Minor Planet Names and Discovery Circumstances, it is "named presumably after the character in the opera of the same name by the German composer, conductor and violinist Ludwig Spohr (1784-1859), one of the leading composers in the early romantic period.'
550 Senta is a minor planet orbiting the Sun that was discovered by German astronomer Max Wolf on 16 November 1904, from Heidelberg.
551 Ortrud is a minor planet orbiting the Sun. It is located in the Main Belt. In light of the practice of the discover c. 1904 to name his asteroids after female characters in opera, it is likely that Ortrud is named after a character in Richard Wagner's opera Lohengrin.
552 Sigelinde is a minor planet orbiting the Sun.
(673087) 2015 AJ281 (also designated 2011 FW62) is a magnitude-5.0 trans-Neptunian object that was discovered in 2011. Its orbital elements were very uncertain and it was lost. It was recovered on 6 January 2015 as 2015 AJ281. 2011 FW62 has been identified as a member of the Haumea family in a dynamical study led by Proudfoot and Ragozzine in 2019.
