Sky Charts, Catalogs, Atlases & Data Resources
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Astronomical Algorithms, Calculations & Software
Access to Different Forms of Ephemerides
Taki's 8.5 Magnitude Star Atlas
Interactive On-line Atlases

The Astronomical Almanac

The Hipparcos and Tycho Catalogues  
Professional Astronomical DataBases

Google Cataloged Images:

ADC for Amateur Astronomers - The ADC primarily serves the professional astronomy community. However, amateurs can find many of the ADC's catalogs useful for their hobby. NASA has determined that ADC services sufficiently overlap those provided by CDS and others to allow termination of the ADC.

SIMBAD: Query by identifier, coordinates or reference code
NASA/IPAC Extragalactic Database
SEDS (Students for the Exploration and Development of Space)

The Interactive NGC Catalog Online - This is the interactive NGC (and IC, and Messier) catalog at SEDS, based on the famous NGC 2000.0 by R.W. Sinnott of Sky Publishing Corp., who also created the electronic version used by this online service (thanks to Sky Publishing for permitting us this kind of use). Only some minor corrections have been included in our online database. The HTML interface and its features were created by Hartmut Frommert. Thanks to Bill Arnett for helpful hints and support, and the admins of SEDS who provided the appropriate hardware and software basis for this service.
NGC 2000.0 Corrections

Deep Sky Browser J2000.0 - A front end to the ever expanding database called the Deep Sky Database. Includes lists of deep sky objects sorted by catalogues or any other way, with maps and images as well as information for every object in the database.

What's Observable Tonight? - This tool was designed with the small-body observer in mind. Currently, only asteroids and comets in JPL's DASTCOM database are identified.

Why make records of Seeing

Double Stars for Seeing Estimates   From Brian Skiff
The Pickering Seeing Scale

Understanding Atmospheric Seeing
Estimating Limiting Magnitude
Working list of naked-eye deep-sky objects

Stars   from Jim Kaler, Prof. of Astronomy, University of Illinois

Arabic Star Names -- Many star names are of Arabic origin, most of which were used by other nations in the past following almost the same Arabic nomenclature, and many of which have survived in modern scientific astronomical atlases. Listed are some of these Arabic star names and their meanings.

Star Names v1.1.1 (2004-10-01)   from Brian Tung

Star Names   Table of 271 commonly known star names and their definitions in the Western tradition.

Naming Stars - the IAU serves as the internationally recognized authority for assigning designations to celestial bodies and surface features on them. More resources:  

Interactive Star Atlas
    Object Catalogues
    Object Catalogues: Messier
    Object Catalogues: Deep Sky
    Object Catalogues: Named Stars   Naming Stars
    Object Catalogues: Navigation Stars
    Object Catalogues: Iridium Flares

DeepSky Atlas: All Sky Maps
Taki's 8.5 Magnitude Star Atlas

Web-based Planetariums
    JPL's Ephemeris Generator
    JPL's Solar System Simulator
    DeepSky Atlas: All Sky Maps
    Download Sky Charts
    Kerry Shetline's Sky View Café

Corrected Bright Star List, 1997 Astronomical Almanac H2-H31 2
Bright Star Catalog (By Constellation)
Binary Stars
Double and Multiple Stars
Journal of Double Stars
Variable Stars   Star Charts from AAVSO  

Working list of naked-eye deep-sky objects
Deep Sky Catalogs (Messier, Caldwell)
The STScI Digitized Sky Survey comprises a set of all-sky photographic surveys in E, V, J, R, and N bands conducted with the Palomar and UK Schmidt telescopes. The Catalogs and Surveys Branch (CASB) is digitizing the photographic plates to support HST observing programs but also as a service to the astronomical community. Object Catalogue: Palomar Observatory Sky Survey Plates

Object name
Get coordinates from SIMBAD NED

Heavens-Above provides you with all the information you need to observe; satellites, Mir and the International Space Station the Space Shuttle the dazzlingly bright flares from Iridium satellites as well as a wealth of other spaceflight and astronomical information.

The High Altitude Satellite Observers - Most amateur astronomers will have seen at one time or another an artificial satellite travelling across the night sky with the naked eye. Several dozen satellites are easily visible to the naked eye & several hundred are bright enough to be seen in binoculars. Almost all of these satellites are in low earth orbit (LEO), at altitudes between 100 & 1500km above the earth's surface. There are many thousands of satellites in higher altitude orbits, but few observers actively observe these objects often beleiving that these objects are too faint to be easily observable with a small telescope or binoculars. However, there are dozens of satellites in high altitude orbits ranging up to 36,000km altitude that are potential visible to observers using small telescopes ( smaller than 6" diameter), binoculars & even the naked eye.

U.S. Naval Observatory - Welcome to the web pages of the Astronomical Applications Department of the U.S. Naval Observatory. Our products - almanacs, software, and web services - provide precise astronomical data for practical applications, serving the defense, scientific, commercial, and civilian communities.

Astronomy tools
Clear Sky Institute was founded in 1993 to undertake the pioneering effort of completely automating a remote observatory at the University of Iowa. The work was developed with NASA and NSF funding and the results of that effort remain freely available at here. XEphem is an accurate and reliable interactive astronomy software tool for all UNIX-like systems including Linux, FreeBSD and Solaris. XEphem source code and sample databases may be downloaded at no charge.

Planetary Maps
Clickable Planetary Maps

IAU Astronomical Headlines - This page contains brief information on recent astronomical discoveries as reported in the International Astronomical Union Circulars (IAUCs) (published by the Central Bureau for Astronomical Telegrams) and the Minor Planet Electronic Circulars (MPECs) (published by the Minor Planet Center), as well as links to ephemerides and orbital elements for comets and minor planets.
  Recent IAUCs
  Recent MPECs
  List of Recent Supernovae
  Latest Supernovae

The Aladin Sky Atlas - is an interactive software sky atlas allowing the user to visualize digitized images of any part of the sky, to superimpose entries from astronomical catalogs or personal, user data files, and to interactively access related data and information from the Simbad database and Vizier service for all known objects in the field. The driving motivation behind Aladin is the desire to provide a visual summary of the multi-wavelength sky. It should be particularly useful for multi-spectral cross-identifications of astronomical sources, observation preparation and quality control of new data sets (by comparison with standard catalogs covering the same region of sky).

Astrophysics Data System (ADS) - is a NASA-funded project which maintains three bibliographic databases containing more than 5.1 million records: Astronomy and Astrophysics, Physics, and ArXiv e-prints. The main body of data in the ADS consists of bibliographic records, which are searchable through our Abstract Service query forms, and full-text scans of much of the astronomical literature which can be browsed though our Browse interface. Integrated in its databases, the ADS provides access and pointers to a wealth of external resources, including electronic articles, data catalogs and archives. We currently have links to over 5.3 million records maintained by our collaborators.

Astrometric Catalogues Server This server page provides access to the Tycho-2 catalogue, to the main Hipparcos and Tycho-1 catalogues and to the Tycho Reference Catalogue (TRC). The first three catalogues are based on observations made by the ESA Hipparcos satellite, the TRC is based on the Tycho catalogue and the Astrographic catalogue. For more information on the Hipparcos mission and the catalogues please refer to the ESA publication SP-1200. The TRC catalogue is described in A&A, 335, L65-L68 (1998) - July(III) 1998.

Star Catalogs (USNO)  
Star Catalogs for Astrometrica  
Astrometric Catalogues Server

W3Browse provides access to the catalogs and astronomical archives of the High Energy Astrophysics Science Archive Research Center (HEASARC). Catalogs include data from all astronomical regimes, but the emphasis of the archive is data from high-energy astrophysics satellites. European users may find access through LEDAS at the University of Leicester to be more efficient.

Sky View is a Virtual Observatory on the Net generating images of any part of the sky at wavelengths in all regimes from Radio to Gamma-Ray. To select a region of the sky please choose one or more surveys and a target or position. Optionally you may choose the coordinate system, projection, equinox, brightness scaling, and coordinate grid.

Network Resources for Astronomers The amount of data produced by large observational facilities and space missions has led to the archiving and on-line accessibility of much of this data, available to the entire astronomical community. This allows a much wider multi-frequency approach to astronomical research than previously possible. Here we provide an overview of these services, and give a basic description of their contents and possibilities for accessing them. Apart from services providing observational data, many of those providing general information, e.g. on addresses, bibliographies, software etc. are also described. The field is rapidly growing with improved network technology, and our attempt to keep the report as complete and up-to-date as possible will inevitably be outdated shortly. We will endeavor to maintain an updated version of this document on-line.   Links on note.

SKYMAP is an astronomical mapping program written in Fortran and C for Unix workstations by Doug Mink of the Smithsonian Astrophysical Observatory Telescope Data Center. If you just need positions, several other options are available. rgsc for the Guide Star Catalog and star and its variants for other catalogs use the same Fortran and C code as skymap. The WCSTools package contains C programs which can search the GSC, USNO, and SAO catalogs, among others.

The ESO Sky Calendar Tool* - This tool produces a nightime calendar of phenomena for a single site. The listing includes; Sun rise and set times, Astronomical twilights, both in civil time and LST, Moon rise and set times and phase for each night in the month.


Indexes of Maps of the Planets and Satellites 1992 - Beginning with the systematic mapping of the lunar surface more than three decades ago, over 1600 maps of the planets and satellites of the Solar System have been produced by the U.S. Geological Survey and by divisions of the Defense Mapping Agency. This collection of maps is a unique resource that has been derived from images and data returned by a series of remarkably successful space missions. Many of the maps have not been replicated or updated with data from new missions, and thus they represent a very special legacy from the beginnings of space exploration.   Clickable Planetary Maps

Maps of the Solar System - Welcome to the solar system surface map database, a NASA/JPL/Caltech spyglass on the cosmos. Select your planetary system of choice and download maps, or browse the surface features of your favorite planet or satellite!

Digital Geologic Maps of the Planets - All maps in this database have been published by the United States Geological Survey under contract to the National Aeronautics and Space Administration. These maps were originally published between 1971 and 1998. The intent of this web site version of those maps is to provide a planetwide summary of the geology of the best-known planets and satellites (Mercury, Mars, and the Galilean satellites Io, Ganymede, and Callisto) for which a comprehensive set of maps exists. Venus and Europa are still in the process of being mapped. Although images of the outer planets and satellites have been obtained, they are rarely at a resolution allowing detailed geologic mapping, and therefore have not been created and published in the USGS I-map series. The Cassini mission, now on its way to Saturn, will provide much-improved images of Saturn's satellites.


© Copyright 2013 - Samuel J. Wormley