Jonathan's Space Report

Introduction
Definitions and Conventions
II: Organizations Database
- Orgs File: Text and TSV
III: Launch Origins Database
- Sites File: Text and TSV
- Launch Points File: Text and TSV
IV: Launch Platforms
- Platforms File: Text and TSV
V: Launch Vehicles
- Families
  - Data File: Text and TSV
- Launch Vehicle List
  - Data File: Text and TSV
- LV Stages
  - Data File: Text and TSV
- Stages
  - Data File: Text and TSV
- Engines
  - Data File: Text and TSV
VI: Launch Lists
- Launch Time References File: Text and TSV
- Launch List Column Descriptions
- Data: By family
- Data: By designation
- Data: Full list (TSV)
- Data: By family (tar.gz) Supporting files (tar.gz)
- Launch Count Totals
VII: Worlds in the Solar System
- Worlds file column descriptions
- Spin file column descriptions
- Worlds data: Text and TSV
- Spin data: Text and TSV
VIII: Object Catalogs
- Documentation
- Main catalogs
  - satcat (Standard) Text and TSV
  - auxcat (Auxiliary) Text and TSV
  - ftocat (Failed to orbit) Text and TSV
- Temporary catalogs
  - tmpcat (Temporary) Text and TSV
  - csocat (Complementary) Text and TSV
- Supporting catalogs
  - lcat (Endoatmospheric/Low) Text and TSV
  - rcat (Suborbital/Rockets) Text and TSV
- Event catalogs
  - ecat (Events) Text and TSV
  - deepcat (Deep Space) Text and TSV
  - deepcat to satcat/auxcat crossindex Text and TSV
  - hcocat (Heliocentric Register) Text and TSV
  - lprcat (Lunar and Planetary Register) Text and TSV
- Payload catalogs
  - psatcat (Standard, Payloads) Text and TSV
  - pauxcat (Auxiliary, Payloads) Text and TSV
  - pftocat (Failed to orbit, Payloads) Text and TSV
  - ptmpcat (Temporary, Payloads) Text and TSV
  - plcat (Low, Payloads) Text and TSV
  - prcat (Suborb, Payloads) Text and TSV
  - pdeepcat (Deep, Payloads) Text and TSV
- usatcat (List of Unicode satellite names) Text and TSV
- Derived catalogs
  - Current Catalog (Summary of current space object catalog): Column descriptions; Data (Text) and Data (TSV)
  - Orbital Launch Log (orbital launches and payloads) - Column descriptions; Data (Text) and Data (TSV)
  - Geosync Catalog - Column descriptions; Data (Text) and Data (TSV)
- All catalogs (tar.gz)
Acknowledgements

GCAT Release 1.5.7 (2024 Oct 18) | Data Update 2024 Dec 18

Spin File Column Descriptions

Each line in the Spin table represents a body defined in the Worlds file, and gives additional information on the rotational properties of the body. The Spin and Worlds files are linked by the ID and IDName columns (and also by the Name column, but that is not guaranteed to be unique).

ID: This one or two character string defines what kind of IDName designation the body has.
IDName: Combined with the ID field, the IDName provides a unique identifier for the body. See the `worlds file' column descriptions for details.
Name Body name.
Rho Body mean density in units of 1000 kg/cubic metre (i.e. in grams per cc).
IFac Inertial factor. This dimensionless factor f_I relates the total angular momentum of the body to the product of its mass times radius squared, I = f_I M r² Where no information is available, a default value of 0.33 is used.
PoleRA, PoleDec Celestial ICRS position in degrees of the direction of the body's north pole at J2000.0.
Meridian Longitude of planetary meridian at J2000.0, degrees.
SpinRate Rate of change of longitude at J2000.0, degrees per day.
J2, J4, J6 J2, J4 and J6 spherical harmonics multiplied by one million.
PoleRARate, PoleDecRate (degrees/d). Rate of change of ICRS polar RA and Dec at epoch J2000.
PoleFunc A code indicating to software which subroutine to use for detailed polar motion function. This and the succeeding functions are based on the Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements 2015 (and later revisions).
SpinFunc A code indicating to software which subroutine to use for detailed spin rate function.
InitFunc A code indicating to software which subroutine to use for detailed perturbation functions for the body's moons.
JFile Filename containing higher order spherical harmonics for the body. Currently only the Earth has such a file. Its contents are:

Coefficient Value * 1 million

J2 1082.635854

J3 -2.532435346

J4 -1.619331205

J5 -0.2277161016

J6 0.5396348906

GCAT: General Catalog of Artificial Space Objects

Jonathan C. McDowell

Worlds

Spin File Column Descriptions

Coefficient	Value * 1 million
J2	1082.635854
J3	-2.532435346
J4	-1.619331205
J5	-0.2277161016
J6	0.5396348906