| 11. | Ideally, both objects should have been studied shortly after perihelion passage.
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| 12. | It may have had a second outburst about 80 days before perihelion.
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| 13. | Currently, Uranus controls Hylonome's perihelion and Neptune its aphelion.
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| 14. | His prediction of the perihelion passage was correct to within two days.
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| 15. | Upon opening the food replicator, out falls a Key of Perihelion.
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| 16. | It has been observed 202 times over seven perihelion in January 2017.
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| 17. | If it happened at perihelion, we'd be worse off.
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| 18. | See Apsis # The perihelion and aphelion of the Earth.
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| 19. | During perihelion passage the object was 2.9 AU from Earth.
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| 20. | It attained perihelion on 28 December that same year.
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