Sivut kuvina
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Si l'on détermine les constantes des trois clichés à l'aide de ces étoiles, les équations d'élimination pour p et r deviennent1):

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Il faut remarquer ici que les coefficients sont beaucoup plus grands que dans le chapitre précédent par exemple, où nous avons employé à peu près le même nombre d'étoiles. La réfraction influe par les valeurs suivantes:

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Pour les clichés d'Eros, je n'ai pas calculé les corrections de l'aberration. Elles ont été introduites dans les calculs des chapitres précédents; mais dans ces cas elles étaient toutes déterminées d'avance. Dans le cas présent, comme il aurait fallu calculer ces corrections pour chaque cliché, il m'a semblé pouvoir les laisser de côté, puisqu'elles n'affectent point le résultat final.

I

J

Après avoir tenu compte de la réfraction, les constantes deviennent:

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K0'.000179

Les clichés d'Eros R et T ont aussi 16 étoiles de repère communes, avec les coordonnées suivantes:

1) Les unités employées ici sont les mêmes que dans les cas précédents.

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Les équations d'élimination qui déterminent p et r, sont les suivantes:

1626.16

+741.29

1423.28

+ 2003.49

- 2688.67 +3157.63

+ 3195.02

- 2009.05 + 1702.58

53.68

2403.16

+ 2150.63

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Enfin j'ai traité les clichés d'Eros V et X. Ils ont 13 étoiles de repère communes, dont cependant nous avons exclu des calculs deux étoiles, dont les mesures ont été marquées comme incertaines. Les coordonnées rectilignes calculées et mesurées de ces étoiles sont les suivantes:

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Comme le nombre de positions à l'aide desquelles il faudrait calculer les constantes, serait fort réduit, j'ai utilisé aussi dans les calculs d'autres étoiles communes que les étoiles de repère. Pour ces étoiles, j'ai employé comme positions les moyennes des positions calculées à l'aide des constantes définitives des deux clichés. Le tableau ci-dessous donne les coordonnées équatoriales adoptées pour ces étoiles ainsi que leurs coordonnées rectilignes calculées et mesurées.

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