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111:"Aristyllus, a Greek astronomer, who appears to have lived about B.C. 233. He wrote a work on the fixed stars (τηρήσις ἀπλανῶν), which was used by Hipparchus and Ptolemy, and he is undoubtedly one of the two persons of this name who wrote commentaries on Aratus."
45:(c. 300 BC). He was among the earliest meridian-astronomy observers. Six of his stellar declinations are preserved at Almajest 7.3. All are exactly correct within his over-cautious rounding to 1/4 degree. See discussion (and lessons) at
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91:"Aristyllus was an early astronomer in the school of Alexandria. Little is known about him. He made astronomical observations during the first half of the third century BCE, and was probably a pupil of Timocharis."
52:
Aristyllus was long mis-dated to c. 300 BC (which made his data look among the poorest of the ancients); but when his correct date was found by least-squares (Isis 73:259-265 p. 263), it was
94:"Aristyllus and Timocharis are usually considered to have compiled the first true catalog of the fixed stars, in which stars are identified by numerical measurements of their positions."
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that his star declinations' accuracy was unexcelled in antiquity. His data suggest that he worked in
Alexandria: see
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Hockey, T.; Bracher, K.; Bolt, M.; Trimble, V.; Palmeri, J.A.; Jarrell, R.; Marché, J.D.; Ragep, F.J. (2007).
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Dictionary of Greek and Roman
Biography and Mythology
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37:; fl. c. 261 BC) was a Greek
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61:‡3 Table 3 p. 45 (2004).
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167:. Springer. p. 62.
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49:‡1 p. 13 (2007).
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66:lunar crater
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311:Aristarchus
291:Anaximander
273:Astronomers
974:Categories
817:astronomer
714:Influenced
693:Influences
664:Octaeteris
593:Triquetrum
481:Timocharis
466:Theodosius
426:Posidonius
386:Hipparchus
376:Heraclides
316:Aristyllus
301:Apollonius
296:Andronicus
226:2014-12-10
201:2014-12-10
180:2014-12-10
115:References
70:Aristillus
43:Timocharis
39:astronomer
35:Ἀρίστυλλος
27:Aristyllus
568:Astrolabe
501:(Ptolemy)
421:Philolaus
411:Oenopides
396:Hypsicles
341:Cleomedes
336:Callippus
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281:Aglaonice
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55:realized
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371:Geminus
366:Eudoxus
321:Attalus
286:Agrippa
76:Sources
59:DIO 4.1
47:DIO 7.1
684:Zodiac
634:Equant
583:Gnomon
461:Thales
456:Strabo
306:Aratus
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31:Greek
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