Development of this web site was made possible by several grants each from NASA and the NSF.
The purpose of the CALL web site is to allow those doing asteroid photometry
and lightcurve work to to coordinate their efforts so that the best use of
observing time can be made and to keep the asteroid community informed in a
timely way.
Check, then Observe
Please use the Search page before you start work on a target, not after you have
several sessions. This can help avoid unneccesary duplication. On the other hand,
duplication is good if the new data are at a different phase angle or apparition or
because the period cannot be effectively covered by one station or those of similar
longitude.
There are thousands of asteroids within reach of backyard telescopes that have no lightcurve parameters at all and dozens that are wanting only good coverage at one more apparition for modeling. As more objects are covered, the statistical analysis of rotation periods, spin axes, and binary/tumbler populations will produce an improved picture of the system of minor planets.
There are thousands of asteroids within reach of backyard telescopes that have no lightcurve parameters at all and dozens that are wanting only good coverage at one more apparition for modeling. As more objects are covered, the statistical analysis of rotation periods, spin axes, and binary/tumbler populations will produce an improved picture of the system of minor planets.
CALL Site Functions | |
| Registration | Required to submit notifications and lightcurve
parameters |
| Edit Registration | Update username
, password, and/or other
registration information |
| Lightcurve Targets | Select targets and generate
ephemerides based on year/month as well as limiting the range of magnitudes and
declination. . |
| Observing Notifications | Let others known what you're observing or ask
for help |
| Lightcurve Submissions | Submit lightcurve parameters prior to publication |
| Search | Search Notifications and Submissions. |