Data files

日本語

Release assets include UTF-8 CSV and Parquet tables, a JSON schema per table, LICENCE-DATA.md, and SHA256SUMS. CSV uses \N for missing values; Parquet uses null. Numbers retain the source precision. Schema columns give types, units, meanings and sources.

Tables and columns

• bodies: id, kind, parent, nameEn, nameJa, radiusKm, flattening, massKg, gmKm3s2, surfaceGravityMs2, tiltDeg, rotationHours, poleRa, poleDec, colour. Surface gravity is GM divided by radius squared, not a local measurement.
• orbital-elements: id, parent, elementKind, frame, epochMs, aAu, aKm, eccentricity, inclination, node, argumentPeriapsis, meanAnomaly, meanLongitudeRate, periapsisRate, nodeRate, acceleration, poleRa, poleDec, waveAmplitude, wavePeriodDays, wavePhase, source. Angles are degrees; rates and epochs are described in the schema. Planet rows contain only the mean semi-major axis available in the source; other elements are missing. Dwarf planet and dwarf moon elements are osculating; other moon elements are mean or fitted mean.
• spacecraft: id, nameEn, nameJa, agency, launchMs, launchPrecision, launchSiteEn, launchSiteJa, launchVehicle, endMs, status, url, horizonsId, recordStartMs, recordEndMs, joins (a JSON array).
• spacecraft-events: craftId, order, kind, dateMs, precision, nameEn, nameJa, body, distanceKm.

The code is MIT. Data sources retain their own terms; read LICENCE-DATA.md for the exact credits and conditions. Theory coefficient tables are excluded while their redistribution terms are unsettled.

Loading examples

These examples are untested; install the relevant tools yourself.

Pandas:

import pandas as pd
bodies = pd.read_csv("bodies.csv", na_values=[r"\N"])
bodies = pd.read_parquet("bodies.parquet")

Polars:

import polars as pl
bodies = pl.read_csv("bodies.csv", null_values=r"\N")
bodies = pl.read_parquet("bodies.parquet")

R:

bodies <- arrow::read_parquet("bodies.parquet")

Rust (with the Polars parquet feature):

use polars::prelude::*;
let bodies = ParquetReader::new(std::fs::File::open("bodies.parquet")?).finish()?;