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simulated slide rule with an arc of crossed lines that can be used to compute the declination based on time of day, given the noon value from the atlas

Download link

https://social.v.st/system/media_attachments/files/114/337/081/168/597/445/original/354e654c6a002bf2.png

Notices where this attachment appears

  1. Embed this notice
    Trammell Hudson (th@social.v.st)'s status on Monday, 28-Apr-2025 04:02:35 JST Trammell Hudson Trammell Hudson
    in reply to

    although this arrangement for the solar declination correction might be better, even though it makes low d changes less accurate.

    In conversation about 23 days ago from social.v.st permalink
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