| 11. | During the 2004 perihelion passage the comet brightened to about apparent magnitude 11.
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| 12. | The starting apparent magnitude is not far from the naked eye visibility limits.
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| 13. | Its nearest multiple is approximately 5.6 degrees dimmer in apparent magnitude.
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| 14. | Beta Centauri B is a B1 dwarf with an apparent magnitude of 4.
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| 15. | Its apparent magnitude is 4.5 and it is approximately away.
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| 16. | The system has a combined apparent magnitude of + 3.84.
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| 17. | He made the first measurement of the Sun's apparent magnitude.
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| 18. | It is a Cepheid variable in apparent magnitude + 5.77.
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| 19. | The apparent magnitude is 8 and absolute magnitude is 4.
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| 20. | The system has a combined apparent magnitude of + 5.24.
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