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that can be attributed to the gravitational pull of a large undiscovered object in the outer Solar System. Although most astronomers agree that Planet X, as Lowell defined it, does not exist, as of
January 2016 there is speculation concerning
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of a binary system based on its orbital period, so
Harrington was the first to calculate the mass of the Pluto-Charon system, which was lower than even the lowest previous estimates of Pluto's mass.
141:(JPL DE), the supposed discrepancies in the Uranian orbit, and with them the need for a Planet X, vanished. There are no discrepancies in the trajectories of any space probes such as
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76:. For this reason, some consider Harrington to be a co-discoverer of Charon, although Christy usually gets sole credit. By the laws of
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Myles
Standish (1992-07-16). "Planet X – No dynamical evidence in the optical observations".
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The
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beyond Pluto and supported searches for it, collaborating initially with
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34:(October 21, 1942 – January 23, 1993) was an American
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Harrington worked at the USNO. Another astronomer there,
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For much of his career, he proposed the existence of a
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113:Disproof of existence of Planet X
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23:Robert Harrington (right) with
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289:. New York: Walker. p.
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217:Betz, Eric (2015-06-09).
109:was named in his honour.
313:Littmann (1990), p. 204.
93:T. C. (Tom) Van Flandern
32:Robert Sutton Harrington
238:Croswell (1997), p. 66.
180:Planets beyond Neptune
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323:Tom Standage (2000).
283:Tom Standage (2000).
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397:American astronomers
250:Astronomical Journal
54:. He was married to
50:. His father was an
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121:had used data from
98:Harrington died of
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38:who worked at the
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119:E. Myles Standish
100:esophageal cancer
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392:1993 deaths
387:1942 births
372:(1993) 1496
168:Planet Nine
381:Categories
357:Obituaries
225:2016-06-26
186:References
150:Pioneer 11
144:Pioneer 10
123:Voyager 2'
36:astronomer
162:Voyager 2
156:Voyager 1
71:satellite
206:Obituary
174:See also
104:asteroid
89:Planet X
48:Virginia
258:Bibcode
127:Neptune
78:physics
27:in 1978
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159:, and
135:Uranus
74:Charon
368:BAAS
67:Pluto
335:ISBN
295:ISBN
131:Mars
82:mass
331:168
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266:doi
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