CARA Project

All about us and the project itself

References page updated

We have updated the References page.

Downloads documents, software and utilities

In this page documents, software and utilities are available.

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Some software packages are free. while others are available after registration.

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Chronologically ordered from the last published

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).

Measuring comets with the Afrho quantity

Wed, 2004/03/24 - 01:00 — admin- revised feb 2011

Observing comets

Comets are a typical target for amateur astronomers. Scientific observations span from basic visual techniques (drawing and total magnitude estimates) to imaging and CCD techniques, the latter devoted in particular to astrometry and photometry.

Astrometry  and photometry require two different approaches.



  • Giannantonio Milani

Main Collaborators (alphabetic order):

  • Erik Bryssinck
  • Dario Castellano
  • Mauro Facchini
  • Ernesto Guido
  • Rolando Ligustri
  • Martino Nicolini
  • Carmen Perrella
  • Giovanni Sostero
  • Roberto Trabatti
  • Carlo Vinante

Professional astronomers (references)


Basic CARA project Policy

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