EntityQ543230· pop 21· linked from 85 articlesHenry E. HoltSign in to saveastronomer (1929–2019)ConnectionsCarolyn S. ShoemakerEntityMinor Planet CenterEntitylist of minor planets: 4001–5000EntitycometEntityInternational Standard Book NumberEntitydigital object identifierEntityInternational Standard Serial NumberEntityApollo programConceptRobert A. HeinleinEntityastronomerEntitybibcodeEntityminor planetEntityUnited States Geological SurveyEntityHarrison SchmittEntityphotometryEntitySurveyor programEntitySpringer Science+Business MediaEntity5261 EurekaEntityplanetary geologyEntity4581 AsclepiusEntityCategories1929 births2019 deaths20th-century American astronomersDiscoverers of asteroidsDiscoverers of cometsDiscoveries by Henry E. HoltNorthern Arizona University facultyUnited States Geological Survey personnel