Magnitudo (astronomia)
Magnitudo in astronomia est mensura logarithmica claritatis rei, in certa longitudine undarum vel finibus transitoriis? constitutae, plerumque in spectro aspectabili vel infrarubro proximo descriptae. Inexacta sed ordinata magnitudinis rerum determinatio antiquitate ab Hipparcho introducta est. Astronomi binas magnitudinis definitiones adhibere solent: magnitudo apparens et magnitudo absoluta.
Exempla
recensereHic habes tabulam quae exponit magnitudines apparentes rerum caelestium et satellitum artificiosorum quae transeunt a Sole ad rem hebitissimam per Telescopium Spatiale Hubbleanum visibilem:
Magnitudo apparens |
Claritas per magnitudinem 0 |
Exemplum | Magnitudo apparenst |
Claritas per magnitudinem 0 |
Exemplum | Magnitudo apparens |
Claritas per magnitudinem 0 |
Exemplum | ||
---|---|---|---|---|---|---|---|---|---|---|
−27 | 6.31×1010 | Sol | −7 | 631 | SN 1006 supernova | 13 | 6.31×10−6 | 3C 273 quasar / limit of 4.5–6" (11–15 cm) telescopes | ||
−26 | 2.51×1010 | −6 | 251 | International Space Station (max.) | 14 | 2.51×10−6 | Pluto (max.) / fines telescopiorum 8–10" (20–25 cm) | |||
−25 | 1×1010 | −5 | 100 | Venus (max.) | 15 | 1×10−6 | ||||
−24 | 3.98×109 | −4 | 39.8 | Hebetissimae res visibiles per diem oculo nudo cum sol superus est[1] | 16 | 3.98×10−7 | Charon (max.) | |||
−23 | 1.58×109 | −3 | 15.8 | Iupiter (max.), Mars (max.) | 17 | 1.58×10−7 | ||||
−22 | 6.31×108 | −2 | 6.31 | Mercurius (max.) | 18 | 6.31×10−8 | ||||
−21 | 2.51×108 | −1 | 2.51 | Sirius | 19 | 2.51×10−8 | ||||
−20 | 1×108 | 0 | 1 | Vega Saturni (max.) | 20 | 1×10−8 | ||||
−19 | 3.98×107 | 1 | 0.398 | Antares | 21 | 3.98×10−9 | Callirrhoe (satelles Iovis) | |||
−18 | 1.58×107 | 2 | 0.158 | Polaris | 22 | 1.58×10−9 | ||||
−17 | 6.31×106 | 3 | 0.0631 | Cor Caroli | 23 | 6.31×10−10 | ||||
−16 | 2.51×106 | 4 | 0.0251 | Acubens | 24 | 2.51×10−10 | ||||
−15 | 1×106 | 5 | 0.01 | Vesta (max.), Uranus (max.) | 25 | 1×10−10 | Fenrir (satelles Saturni) | |||
−14 | 3.98×105 | 6 | 3.98×10−3 | usitatus finis oculi nudi | 26 | 3.98×10−11 | ||||
−13 | 1.58×105 | luna plena | 7 | 1.58×10−3 | Ceres (max.) | 27 | 1.58×10−11 | finis lucis visibilis telescopiorum 8m | ||
−12 | 6.31×104 | 8 | 6.31×10−4 | Neptunus (max.) | 28 | 6.31×10−12 | ||||
−11 | 2.51×104 | 9 | 2.51×10−4 | 29 | 2.51×10−12 | |||||
−10 | 1×104 | 10 | 1×10−4 | usitatus finis binoculariorum 7x50 | 30 | 1×10−12 | ||||
−9 | 3.98×103 | Fulgor Iridii | 11 | 3.98×10−5 | 31 | 3.98×10−13 | ||||
−8 | 1.58×103 | 12 | 1.58×10−5 | 32 | 1.58×10−13 | visible light limit of HST |
Nexus interni
Notae
recensereBibliographia
recensere- Heifetz, Milton D., et Wil Tirion. 2004. A walk through the heavens: a guide to stars and constellations and their legends. Ed. 3a. Cantabrigiae: Cambridge University Press. ISBN 0521544157.
- Keill, J. 1739. An introduction to the true astronomy. Ed. 3a. Londinii.
Nexus externi
recensere- Rothstein, Dave. 2003. What is apparent magnitude? Cornell University, 18 Septembris.