Archive for Comet

Comet 103P/Hartley

Posted in Astrophotography with tags , , , , , , on 2010/10/12 by computerphysicslab

Comet Hartley 2, officially known as 103P/Hartley 2 is a small comet that orbits the Sun with a period of 6.46 years. It was discovered by astronomer Malcolm Hartley in 1986 using the Schmidt telescope in Siding Spring Observatory (Australia).

It is estimated that its nucleus has a size between 1200 and 1600 meters, according to recent observations of the Spitzer Space Telescope (August 2008): its albedo, very small, is close to 0.028 as it is covered with very dark carbonaceous bodies probably hydrocarbons. The mass is estimated around 3 × 10 ^ 11 kg.

In its approach to the Sun of 2010 is visible in the constellations of Cassiopeia, Perseus and Auriga, but could be visible to the naked eye in mid-October of that year from places with dark skies: it reaches its minimum distance from our planet on October 20th standing at only 0.12 Astronomical Units. A few days later, on October 28th, passes through the perihelion located a little over 157 million miles from our star.

In their approach the year 2010 this image was obtained through a 6-inch refractor telescope.

Its next step takes place on April 2017.

28 minutes of exposure for Lulin

Posted in Astrophotography with tags , , , , on 2009/02/17 by computerphysicslab

Very dim Lulin needs long exposures to get captured. With no tracking, using the shift-and-add method and the pocket camera Casio Exilim EX-Z80 under light polluted skies I got this picture:

Long exposure for Lulin

Lulin Comet

Posted in Astrophotography with tags , , , on 2009/02/15 by computerphysicslab

It has not been easy to get a shot of Lulin Comet from the light polluted city I live in. Lulin is not a bright comet. I couldn’t observe it with naked eye. It was only visible through the Vixen 12×80 binoculars. Here we see Lulin near Spica, alfa Virgo. The Moon appears to make harder to get a good contrast.

Lulin Comet

Comet Szczepanski C/1996 B1

Posted in Astrophotography with tags , , , , , , , on 1996/03/17 by computerphysicslab

Comet Szczepanski C/1996 B1 captured with a 50 mm Reflex analog camera under dark skies, Manaluna Observatory. Comet Szczepanski was very dim, around 8th magnitude, near Regulus, alfa Leo Major.

Comet Szczepanski C/1996 B1