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These routines do astronomical or calendrical calculations.

- astron
To calculate the position and position-dependent characteristics of the Sun and the planets Mercury through Neptune.

- calendar
To convert between various calendars.

- date_from_tai
To convert TAI seconds to a time string.

- easterdate
To calculate the date of Easter.

- readorbits
To read auxilliary orbital data.

- showorbits
To display auxilliary orbital data.

- solar_b
To calculate the solar B angle as seen from the Earth.

- solar_l
To calculate the Carrington longitude at the solar prime meridian as seen from the Earth.

- solar_p
To calculate the solar P angle as seen from the Earth.

- solar_r
To calculate the apparent angular solar radius as seen from the Earth.

- sun_b
To calculate the solar B angle as seen from the Earth.

- sun_d
To calculate the solar D angle as seen from the Earth.

- sun_p
To calculate the solar P angle as seen from the Earth.

- sun_r
To calculate the solar radius as seen from the Earth.

- tai_from_date
To transform a date to TAI seconds.

See also: calendar

• Astronomical Coordinate Calculations: | ||

• Astronomical Time Scales: |