[INDOLOGY] Inquiry on Equatorium and Planetary Diagrams in Sanskrit Sources

[Lubomír Ondračka]

The best place to look for the answer to the first question is Sarma's 
incredible catalogue of Indian astronomical instruments (available here: 
https://srsarma.in/catalogue.php).

It does not have equatoria as a separate category, it just lists 
different types of astrolabes, but it is definitely worth a closer look.

L.

On 31/03/2025 12:54, AJ Misra via INDOLOGY wrote:
> Dear colleagues:
> 
> I am asking on behalf of a colleague who is not  a member of Indology 
> listserv. I have excerpted his email below.
> 
> ──
> 
>     I’m writing to kindly ask whether you’ve come across, in Sanskrit—or
>     any other South or East Asian—astronomical or primary sources, any
>     description or reference to an astronomical instrument known in
>     modern literature as an /equatorium/.
> 
>     I’m also wondering if you’ve seen any diagrams in Sanskrit texts
>     that depict planetary models enclosed by a graduated ecliptic
>     circle. For reference, I’ve attached two examples of such diagrams
>     from Arabic and Persian sources.
>     image.png
>     image.png
> 
>   ──
> I welcome any suggestions/comments on this.
> 
> With kind regards,
> AJ
> --
> <https://www.mpiwg-berlin.mpg.de/research/departments/max-planck- 
> research-group-astra>
> *Anuj MISRA*, Ph.D (he/him)
> /Max Planck Research Group Leader <https://www.mpiwg-berlin.mpg.de/ 
> people/amisra>/
> RG: Astral Sciences in Trans-Regional Asia (ASTRA <https://www.mpiwg- 
> berlin.mpg.de/research/departments/max-planck-research-group-astra>)
> Max Planck Institute for the History of Science (MPIWG)
> Boltzmannstraße 22, 14195 Berlin, GERMANY
> 
> Room 102, Harnackstraße 5
> +49 30 22667 313
> amisra at mpiwg-berlin.mpg.de <mailto:amisra at mpiwg-berlin.mpg.de>
> 
> ─ /in conjunction with/─
> 
> /Professor of the History of Science and the History of Knowledge 
> <https://www.geschkult.fu-berlin.de/en/e/wissensgeschichte/ 
> mitarbeiter_innen/Anuj-Misra/index.html>/
> Institute for the History of Knowledge in the Ancient World
> Department of History and Cultural Studies, Free University of Berlin
> Arnimallee 10, 14195 Berlin, GERMANY
> 
> Room 205
> +49 03 838 59046
> a.misra at fu-berlin.de <mailto:a.misra at fu-berlin.de>
> 
> ─
> /Affiliated External Researcher <https://ccrs.ku.dk/staff/?pure=en/ 
> persons/663586>/ (2024─25)
> Department of Cross-Cultural and Regional Studies (CCRS)
> University of Copenhagen, Copenhagen, DENMARK
> anuj.misra at hum.ku.dk <mailto:anuj.misra at hum.ku.dk>
> 
> ─
> /Adjunct Senior Fellow <https://profiles.canterbury.ac.nz/AJ-Misra>/ 
> (since September 2021)
> School of Mathematics and Statistics | Te Kura Pāngarau
> University of Canterbury | University of Canterbury
> Christchurch, NEW ZEALAND
> aj.misra at canterbury.ac.nz <mailto:aj.misra at canterbury.ac.nz>
> 
> 
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