USEFUL LINKS 
Gettysburg College Observatory

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• TIME
• UTC (UNIVERSAL) TIME: Atomic Time from the Naval Observatory
• Local Apparent Sidereal Time:  From USNO.
• Julian Day Converter: From USNO.
• About Time: A "careware" time synchronizer that runs under Windows.
• Time Setting Software:  A list of links for all types of computers.
• Precision Timing Information: Links and Software from Sweden
• Leapsecond Online Clocks: Local, UTC, GPS,  Loran, TAI, and MJD on display! Nice Site
• WEATHER
• Weather: Gettysburg area NOAA report.
• Clear Sky Clock: See the sky in Harrisburg; other cities too.
• Weather Images Wonderful compilation of satellite and webcam links..
• Weather Underground: For Lancaster; nice site.
• Weather for Outdoors Activities: A site geared for observers. 
• NOAA Weather front Center
• ACCUWEATHER for Gettysburg PA
• University of Wisconsin Geo 8 Satellite picture of low clouds updated every 15 min.
• University of Wisconsin Geo 8 Satellite ir picture , updated at 29 and 59 min.
• University of Michigan list of weather sites.
• CHARTS, CATALOGS, and REFERENCE DATABASES
• Digitized Sky Survey: STScI server.
• SIMBAD: Object database mirror at Harvard
• Skymap: Interactive Color Great for finding Charts
• Planetary Ephemerides Calculated at the USNO
• Heavens Above: For Harrisburg---general sky information for date and time.
• Sky-Map---All Sky with zooms---nice for finding charts
• Photopic Sky Survey---Complete zoomable image of the entire sky.
• Nightly Sky Maps: A nice British site.
• Solar System Plotter and Planetary Positions (RA & DEC) a continuously updated plot and tables from Texas A&M
• Deep Sky Database: Lots of galaxy information, and on-line version of the Saguara Database.
• The NASA Astrophysics Data System : Full Articles on line
• Phases of the Moon: From the Naval Observatory
• Satellite Tracking: Find out where they are!
• EXTRASOLAR PLANETS
• Exoplanet Transit Database Timings and ephemerides for known transiting planets from the Czech Astronomical Society.
• Exoplanet Transit Finder : Jeff Coughlin’s Calculator
• Transitsearch.org ---Candidate lists and ephemerides for transits of recently discovered extrasolar planets that may show transits.
• NASA Exoplanet Archive: Kepler and Corot and other datasets along with plotting and ephemeris tools.
• VARIABLE STARS
• Cool Algol Binaries: Observations in collaboration with G. Torres and J. Mader, Center for Astrophysics. 
• Landolt Standards: UVBRI Standards on line with finding charts.
• SUPERNOVAS
• Recent Supernovas: Maintained at the Central Bureau for Astronomical Telegrams, Cambridge, MA
• The Latest Supernovas: Dave Bishop, nice site with lots of observing info. 
• List of all supernovas :   Maintained at the Central Bureau for Astronomical Telegrams, Cambridge, MA
• Supernova Site: Of Jean-Claude Pelle; lots of current information.
• ASTEROID DATA AND REFERENCES
• Lowell Heirarchical Observing Planner :    Gives help in deciding the best night's targets for your location. 
• Minor Planet Mailing List: And a list of linked sites of interest. 
• Asteroid Observing Strategy Planner: Helps you pick out best candidates. From Lowell Obs
• Asteroid Follow-up Sites: Find out what newly discovered asteroids need observing.
• IAU Minor Planet Center : All sorts of useful information, including elements and ephemerides.
• IAU Report Statistics: See how 842 and others stack up in number of asteroids measured.
• How To Observe Asteroids:   An informative guide from the MPC
• Asteroid Checker for Supernova Searches: Minor Planet Center.
• Lowell Critical Lists: Objects that need observing!
• Unidentified LONEOS observations: Other objects that need observing.
• Lowell Asteroid Services: Ephemerides, charts, orbital element lists, etc.
• Lowell Observatory Asteroid Database: The latest elements.
• Lowell Observatory Asteroid Selector: Pick out asteroid based on various parameters.
• Asteroid Plots : Which asteroids can your observatory image in a given area of sky?
• Minor Planet Observer Newsletter: lots of useful info and links.
• Near Earth Object Database: NEODyS From Italy.   What's going to hit us next?
• Other IAU Minor Planet Observatories:  A page of direct links.
• Asteroid Watch: Up-to-date information from JPL.
• Orbit Visualization: Animated model of the Solar system with selected asteroid!  Very nice.
• JPL NEO Tools:Observation Planning and Object Identification
• Meteorite Identification and Information Site---Washington University
• ASTEROID PHOTOMETRY
• Collaborative Asteroid Lightcurve Link ---At the MPC; lists and information on photometry.
• Minor Planet Lightcurve Parameters---From the MPC
• Minor Planet Lightcurve Query---a searchable database.
• CCD  PHOTOMETRY
• CCD Observing Manual from the AAVSO ---Useful basic information on CCD astronomy from the American Association of Variable Star Observers.
• AAVSO Observing Campaigns: -- Collaborative projects for observation.
• "Blank Sky" fields for Sky Flats---a list from La Palma
• DATA REDUCTION AND PROGRAMS
• IRAF The Mother Site at KPNO, with source files.
• IRAF/STARLINK UK Site, with additional information.
• IRAF_NET A treasury of useful routines, tips, and hints,as well as source software and souvenirs.
• WHAT'S UP?
• What's Up: Current Star charts and lists.
• MISCELLANEOUS
• CCD Imaging calculator: Figure parameters of your telescope/camera. 
• The Astro Calculator: If you watch your units, this page makes it easy to do numerical problems in physics, astronomy and astrophysics.
• NURO (Flagstaff) INFORMATION
• NURO : Tne National Undergraduate Research Observatory
• Lowell Observatory: The Home Page at Flagstaff. 
• Flagstaff Webcam: Check out the Weather
• Flagstaff National Weather Service : For the whole area including the Grand Canyon
• MANUFACTURERS AND TECHNICAL INFORMATION
• Astronomical Consultants and Equipment (ACE) who made our telescope drive system
• Santa Barbara Instrument Group (SBIG) manufacturers of CCD Cameras
• GKR Computer Consulting: Makers of PMIS, the software used in our Photometrics camera.
• Apogee Instruments: Manufacturers of CCD Cameras.
• Photometrics (Roper Scientific) : Manufacturers of CCD Cameras.

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copyright Laurence A. Marschal l, Gettysburg College