Catalogs of 2320AD
Cataloguing stars, planets and other bodies was once just a concern for astronomers, but in an interstellar civilization it is important for trade, military projects and public safety.
CaStar catalogs
Most stars lack real names and are known by their catalogue numbers. To complicate things there exist many different stellar catalogs giving stars different numbers, occasionally with errors.
Pre Twilight Catalogs with names still in use:
- Bayer-Flamsteed: Lists stars as <greek letter><constellation> or <number><constellation>. While hopelessly obsolete, names such as Beta num Venaticorum or 61 Cygni remain widely used.
- The Henry Draper Catalogue (HD) was the first large-scale sky survey.
- The Bonner Durchmunsterung (BD) was a pre-photographic survey of much of the sky. It introduced the notation BD<+-declination> <number> that has been used in many other catalogs. Later the Cordoba Durchmunsterung (CD) was introuced. The DM names in the near star map are from these.
- The Catalogue astrographique (AC) was developed 1900-1950 based on photographic images.
- The Luyten catalogue (L)
- Wolf catalog of high proper motion stars.
- VB (Van Biesbroeck) catalog.
- Ross (Ross) Catalogue of New Proper Motion Stars
Post-Twilight Catalogs
The Arago Catalogue was developed by astronomers at the Bordeaux Observatory 2094 based on data from the Arago satellite. Largely superseded by further catalogues it was the first catalogue based on space-based observations (the Hipparchos catalog was never completed due to the Twilight war). Arago II and III improved on the precision significantly.
The Laplace Catalogue was the first interstellar baseline catalogue, created using observations from Earth, Tirane and Nyotekundu (later extended by observations from Proxima and Barnard’s Star). Using the independent parallaxes and long baselines between the systems a large number of stars could be located with high precision. This method has since then been extended into numerous sky surveys.
At present the most complete star catalog is the ARI Sternenförmige Objekt Datenbank, ASOD. ASOD is a clearinghouse for other surveys, combining their data, detecting uncertainties and discrepancies, translating between different indices and generally maintaining humanity’s overall picture of the galaxy (and the nearby ones). It contains about twenty billion stars, most fairly remote.
The Argyle Catalog is a high-resolution catalog of nearby stars, their location determined through multi-system observations. A follow-up catalog, the Dearborn catalog, includes most stars within 600 lightyears.
The InterStellar Object database, ISO, is an originally American database of brown dwarves. Due to their strategic importance many known dwarves are not listed or have officially secret coordinates: “Back Door”, called “BD –111 094307” in official documents (a clearly made-up name to any astronomer) has for example just an approximate location given in the entry for ISO 314, its “real” name. ARI and some other astrographical organisations are protesting against the practice (there are rumors that some astronomers are looking for the strategic brown dwarves to publish their location out of sheer spite).
Planets
The International Astronomical Union has final say on naming space geography. It has restricted itself to names for stars, planets, moons, asteroids and other major natural features. Except for the solar system the nomenclature of surface features of planets is left to the discoverers.
The IAU nomenclature database is the “official names” for objects in explored space. This does not mean that they are actually used. It is maintained by the IAU Nomenclature Division and its working groups.
The current convention is that the first survey expedition to reach a system (or send an unmanned probe there) gets to suggest names for its bodies. In many countries a list of “approved options” are supplied to explorers. The IAU then decides on the matter, and the names become official. Usually further discoveries are made and reported by other surveyors. Occasionally conflicts occur (as in the case of the Beta Canum Venaticorum system) and the IAU may adjudicate them.
Names for planetary geography are outside the IAU remit (although it occasionally advices); the IAU Planetary Science Division maintains a database of geographical names, coordinates and features but for inhabited worlds the most accurate information is usually the geographical survey agency of the colonizing nation.
Many systems have local notations for asteroids, minor moons or even debris in rings.
The IAU maintains the IAU Object Catalogue which is the master list of data for non-stellar objects. It includes not just planets, asteroids and comets of explored systems but also numerous extrasolar planets that have been observed at a distance.
Navigation databases
Navigation databases require high precision and up-to-data information but cares little for the physical properties of objects as long as they do not impair spaceflight. Most data covers orbits, mass, presence of magnetic fields, documented navigational hazards and legal aspects.
There exist a few “master” navigation databases: the 2320 IAU Object Catalogue, the ESA Carte Astronomique Database (plus Annex I-XIV) and the AECA Atlas. These are the most authoritative lists of what bodies are where when and with what velocities.
Unfortunately they are not directly suitable for the needs of ship captains (and access can cost a pretty penny). Hence many navigation companies produce databases and astrogation software that take inputs from the master databases and local surveys, adds navigational and legal information and puts it all in a nice package.
Some of the most popular are:
Sextant from Washington Astrometrics. Only a navigation database, but very complete and equipped with numerous tools for handling unusual demands.
NaviSys from Bennet, Bedini & Vista. A fully integrated system for navigation and planning.
Renard and
Optim from AIS (French). A state of the art combined navigation database and position fitter program, and a system for planning stutterwarp journeys.
MIO from Xian Navigation. Not as reliable or slick as the French navigation software, but cheap and extensible. Widely used by Libertine Traders with their own private navigational libraries.
TriNav from Trilon Naval Data. Not very impressive on its own, but it comes as default (and hard to remove) on most Trilon-built ships, and works extremely well together with other software from TND such as piloting software, comms software, targeting software and geography software.