# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/asaph-hall
# Generated: 2026-09-02T06:05:36.825Z

schema: https://schema.org/Person
url: "https://fame.am/person/asaph-hall"
name: "Asaph Hall"
slug: "asaph-hall"
description: "He found Mars's two moons in 1877 when most astronomers thought there were none to find."
tagline: "American astronomer (1829–1907)"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/Professor_Asaph_Hall.jpg"
gender: "male"
country:
  name: "United States"
  isoCode: "US"
category:
  name: "Scientists"
  slug: "scientists"
profileType:
  name: "Scientist"
  slug: "scientist"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1829-10-15"
deathDate: "1907-11-22"
livingStatus: "DECEASED"
scores:
  popularity:           53.73
  momentum:             0.5421686746987949
  historical:           21.856232
  currentAttention:     3.012048192771083
  sourceConfidence:     60
  profileCompleteness:  70
  trendDirection:       "STABLE"
ranks:
  global:   null
  country:  null
  category: null
tags:
  - name: "Scientists"
    slug: "scientists"
  - name: "Scientist"
    slug: "scientist"
  - name: "Astronomy"
    slug: "astronomy"
  - name: "Mathematics"
    slug: "mathematics"
  - name: "United States"
    slug: "united-states"
  - name: "Americas"
    slug: "americas"
  - name: "19th Century"
    slug: "19th-century"
sources:
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    title: "Wikipedia"
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    title: "Wikidata"
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    title: "Pantheon 2.0"
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    title: "اساف هول"
    type:  "WIKIPEDIA"
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    title: "آساف هال"
    type:  "WIKIPEDIA"
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    title: "Асаф Хол"
    type:  "WIKIPEDIA"
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    title: "Асаф Хол"
    type:  "WIKIPEDIA"
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    title: "Asaph Hall"
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    type:  "WIKIPEDIA"
  - url: "https://cs.wikipedia.org/wiki/Asaph_Hall"
    title: "Asaph Hall"
    type:  "WIKIPEDIA"
  - url: "https://da.wikipedia.org/wiki/Asaph_Hall"
    title: "Asaph Hall"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Asaph_Hall"
    title: "Asaph Hall"
    type:  "WIKIPEDIA"
  - url: "https://el.wikipedia.org/wiki/%CE%88%CE%B9%CE%B6%CE%B1%CF%86_%CE%A7%CE%BF%CE%BB"
    title: "Έιζαφ Χολ"
    type:  "WIKIPEDIA"
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    title: "Asaph Hall"
    type:  "WIKIPEDIA"
  - url: "https://es.wikipedia.org/wiki/Asaph_Hall"
    title: "Asaph Hall"
    type:  "WIKIPEDIA"
  - url: "https://eu.wikipedia.org/wiki/Asaph_Hall"
    title: "Asaph Hall"
    type:  "WIKIPEDIA"
  - url: "https://fa.wikipedia.org/wiki/%D8%A2%D8%B3%D8%A7%D9%81_%D9%87%D8%A7%D9%84"
    title: "آساف هال"
    type:  "WIKIPEDIA"
  - url: "https://fi.wikipedia.org/wiki/Asaph_Hall"
    title: "Asaph Hall"
    type:  "WIKIPEDIA"
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    title: "Asaph Hall"
    type:  "WIKIPEDIA"
  - url: "https://ga.wikipedia.org/wiki/Asaph_Hall"
    title: "Asaph Hall"
    type:  "WIKIPEDIA"
  - url: "https://gl.wikipedia.org/wiki/Asaph_Hall"
    title: "Asaph Hall"
    type:  "WIKIPEDIA"
  - url: "https://gv.wikipedia.org/wiki/Asaph_Hall"
    title: "Asaph Hall"
    type:  "WIKIPEDIA"
  - url: "https://he.wikipedia.org/wiki/%D7%90%D7%A1%D7%A3_%D7%94%D7%95%D7%9C"
    title: "אסף הול"
    type:  "WIKIPEDIA"
  - url: "https://hif.wikipedia.org/wiki/Asaph_Hall"
    title: "Asaph Hall"
    type:  "WIKIPEDIA"
  - url: "https://hr.wikipedia.org/wiki/Asaph_Hall"
    title: "Asaph Hall"
    type:  "WIKIPEDIA"
  - url: "https://af.wikipedia.org/wiki/Asaph_Hall"
    title: "Asaph Hall"
    type:  "WIKIPEDIA"
  - url: "https://ar.wikipedia.org/wiki/%D8%A3%D8%B3%D8%A7%D9%81_%D9%87%D9%88%D9%84"
    title: "أساف هول"
    type:  "WIKIPEDIA"

# bio (long form, separated for readability)
bio: |
  Asaph Hall III was born October 15, 1829, and spent decades mapping the mechanics of the solar system — calculating satellite orbits, measuring Saturn's rotation, weighing Mars itself. In August 1877, working at the U.S. Naval Observatory, he turned a telescope on Mars and spotted what no one else had: two tiny moons wheeling close to the planet, which he named Deimos and Phobos. The discovery made him one of the era's most prominent astronomers, a specialist in double stars and planetary systems. He died November 22, 1907, having proven that even well-watched worlds can hide something in plain sight.