CARA Project

All about us and the project itself

Comet 168P/Hergenrother outburst

Here you can find a preliminary Af[rho] plot of 168P/Hergenrother, referring to its recent outburst:

103P/Hergenrother outburst

Report of the annual meeting of UAI research sections on meteorites, asteroids and comets.

Hereafter a brief report of the annual meeting.

(clic picture to enalarge)

foto di gruppo

Afrho Databased available

The Afrho Database is now online.
It is browsable by authenticated users only.

We are going to implements the export filters; at the moment we can export as CSV file the data displayed by the query.
Feel free to contact me to notice me errors and/or implementation as well as help requests (just use the contact module and write to webmaster).

the admin

Documentation section updated

Hello everybody
we've just update the Documentation as well as the Software page including more files.

References page updated

We have updated the References page.

Downloads documents, software and utilities

In this page documents, software and utilities are available.

Downloads depends on the permission you have been assigned.
Some software packages are free. while others are available after registration.

Select this LINK to go on Documentation Page

Select this LINK to go on Software Page


This page is still under construction



Chronologically ordered from the last published

Milani, G., Bryssink, E., Nicolini, M., et al. Photometry and imaging of Comet 103P/Hartley in the 2010-2011 apparition” – Icarus 222, 786-798(2013)

Use of the optical filter on comets

In observing celestial targets most amateur astronomers routinely do not use filters; this helps in getting a better signal to noise ratio, a quite important task when very faint objects are observed and when time exposure is a crucial parameter. This happens  for instance with fast moving objects or for observing a large number of targets each night.

Introduction to CARA Cometary CCD photometry method

Cometary photometry is not simple and some rules must are important as it has characteristics quite different than classical star photometry.
Comets move in the sky and finding each night proper reference stars for photometry is not obvious. As routine we ask to check in advance the field to where the comet will be that night to look for reference stars in the field of view. Sometimes you need extra images of nearby fields to get reference stars.

How can I contribute ?

The contribution to the CARA project is free, but some basic requirements are needed.

A telescope coupled with a CCD camera (no anti-blooming is highly preferred) with an image scale around 1-3 arcsec/pixel and at least one photometric filter (R or I Cousins / Bessel filters are suggested).
A sophisticated equipment is not specifically needed, but must be of enough quality and solidity to grant  standard results and match the requirements to perform a basic scientific research (reproducible results).

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