{"success":true,"project":"Astro Sindhi Observatory","engine":"SolarPositionEngine","version":"1.0.0","status":"production-research-api","timezone_standard":"Asia/Karachi","freshness":{"requested_date":"2026-10-16","calculated_for":"2026-10-16","valid_date":"2026-10-16","generated_at":"2026-10-16T18:57:00+05:00","valid_from":"2026-10-16T18:57:00+05:00","valid_until":"2026-10-16T18:58:00+05:00","expires_at":"2026-10-16T18:58:00+05:00","timezone":"Asia/Karachi","is_live":true,"is_stale":false,"cache_bucket":"20261016-185700"},"data":{"project":"Astro Sindhi Observatory","engine":"SolarPositionEngine","version":"1.0.0","input":{"datetime":"2026-10-16T18:57:03+05:00","timezone":"Asia/Karachi","latitude":25.396,"longitude":68.3578},"result":{"utc":"2026-10-16T13:57:03Z","asia_karachi":"2026-10-16T18:57:03+05:00","julian_day_utc":2461330.08128472,"jde_tt":2461330.0821593,"delta_t_seconds_estimate":75.563,"mean_longitude_degrees":205.10688106,"mean_anomaly_degrees":281.70883187,"eccentricity_earth_orbit":0.016697363154,"equation_of_center_degrees":-1.88119618,"true_longitude_degrees":203.22568488,"apparent_longitude_degrees":203.22260642,"right_ascension_degrees":201.48786685,"right_ascension_hours":13.43252446,"declination_degrees":-9.02334458,"mean_obliquity_degrees":23.43580728,"true_obliquity_degrees":23.43795143,"equation_of_time_minutes":14.482651,"earth_sun_distance_au":0.9968811189,"apparent_diameter_degrees":0.53479597,"apparent_diameter_arcminutes":32.08776,"local_sidereal_time_degrees":302.72054346,"hour_angle_degrees":101.23267661,"solar_altitude_degrees":-13.94882543,"solar_azimuth_degrees":266.5044398,"observer_latitude_degrees":25.396,"observer_longitude_degrees":68.3578,"equinox_check_note":"Vernal equinox occurs when apparent solar longitude is near 0°/360°."},"status":{"calculation_status":"production_solar_position_engine","historical_status":"historical_validation_ongoing","scientific_validation":"ongoing","precision_note":"Solar position values are generated through the Observatory computation framework. Scientific validation and reference comparison remain ongoing."},"assumptions":{"calendar":"Gregorian date/time input; proleptic Gregorian handling for historical dates in this production research engine.","timezone_default":"UTC","time_scale":"UTC input converted to approximate Terrestrial Time using ΔT estimate."}},"meta":{"api_schema":"1.1","api_status":"production-research-api","scientific_validation":"ongoing","request_id":"9bbc06fdefb5726d","freshness":{"requested_date":"2026-10-16","calculated_for":"2026-10-16","valid_date":"2026-10-16","generated_at":"2026-10-16T18:57:00+05:00","valid_from":"2026-10-16T18:57:00+05:00","valid_until":"2026-10-16T18:58:00+05:00","expires_at":"2026-10-16T18:58:00+05:00","timezone":"Asia/Karachi","is_live":true,"is_stale":false,"cache_bucket":"20261016-185700"},"attribution":{"source":"Astro Sindhi Observatory","website":"https://astro.sindhilanguage.org","developer_portal":"https://astro.sindhilanguage.org/api/","organization":"SindhiLanguage.org","organization_url":"https://sindhilanguage.org","data_license":"CC BY 4.0","software_license":"All Rights Reserved unless otherwise stated"},"calculation_model":"Meeus-style low-precision solar formulae"}}