Miscellaneous

An online asteroid orbital elements database
Locations of planetary mean-motion resonances the solar system
Create a table of sunrise, sunset, transit, and astronomical and civil twilight times for any location
Create plots of the altitude and azimuth of the Sun throughout the day for a given day at any location
Make a plot of the Analemma of the Sun for a given location at noon. This analemma plot is somewhat unusual because the horizontal axis represents the offset of the Sun at noon at your location in minutes of time.
A Julian date converter

Amateur Astronomy

Solar, planetary, and deep space images I've acquired with an inexpensive achromatic refractor
How to mitigate scattered light
My equipment
Effect on digital solar images of IR blocking and "minus-violet" dielectric filters.
A list of 139 close binaries representing a challenge for telescopes of 4-6 inch aperture.

A few small projects, utilities, etc.

Other Stuff

DeerCam! Also, watch a movie (4.2 MB) of a deer and her fawn outside my office window.
Algebraic Cats!
KittyKam!
Keiko's Kittens! My cat, Keiko, rescued from the MCHS, came home with a severe respiratory infection as well as another "condition": she had kittens on the night of September 11/12, 2004. Watch them being born!
Memo to the household pets
My encounter with a trojan virus.
Moind's Fourth Postulate
Ever wonder what Worf would say if he were a programmer?
A classic bit of math humor
Dover Beach
The APOTD (Astronomy Picture of the Day).
NOAA East Coast IR Loop
A glimpse of just how bad light pollution is in the U.S. [from the Defense Meteorological Satellite Program (DMSP)]
Pictures from the Smithsonian Kite Festival: 2007 2003
Pictures of some of the 112 Gargoyles at the National Cathedral. These were taken with a digital camera through a small, 8×32 telescope held up to the camera lens by hand.
Pictures from the 2005 Inaugural Parade day
I found this fellow with his head buried in my leg one summer evening. It's an adult male American Dog tick (Dermacentor variabilis). These ticks are known to transmit Rocky Mountain Spotted Fever and Tularemia, but the likelihood of infection is normally small. Click on the image for a larger, more detailed one. The picture was taken with a digital camera with a 10× Hastings triplet magnifying lens held by hand up to the camera lens.
Some days feel just like this, don't they?
Current and near-future sky conditions near the Naval Observatory:

	last modified: 02 April 2007 09:32