Astrofriend's homepage


Advertisement / Annons:

Valid CSS!

Navigation

Advertisement /
Annons:

Astronomy News

Comet
Hyakutake C/1996 B2


Hyakutake C/1996 B2 on CCD camera 1996
Object : Comet Hykutake C/1996 B2
Date : 1996-03-24
Time (UT) : 20:09 to 20:47
Mount : Special from left over parts Stockholm University
Lens/telescope : Nikon 50mm f1.4 (f2.0)
Filter : none
Camera : Spectra Source Instruments HPC-1, mono chrome CCD 1024x1024.
Exp. time : 4x20 seconds
Image process tool : Matlab, Corel Draw. All image processing done by my own developed Matlab routines.
Processing : align, resize, level, cal dark and gamma image processing
Site : Sweden, Saltsjöbaden.
Information in Swedish about Saltsjöbadens observatory:
https://sv.wikipedia.org/ wiki/Saltsj%C3%B6 badens_observatorium
Comment : Comet discovered 1996-01-30 by Yuji Hyakutake, sorry to read that he had passed away: http://www.skyandtelescope.com/.

Hyakutakes closest approach to Earth at march 25, distance 0.1 AU.
AU, Astronomical Unit, 1 AU are the distance between the Earth and the Sun, about 150 million kilometers.
0.1 AU is about 400 times moon distance.

Hyakutake C/1996 B2 color on tripple CCD filter 1996

Object : Comet Hykutake C/1996 B2
Date : 1996-03-24
Time (UT) : 23:00
Lens/telescope : Nikon 50mm f1.4 (f2.0)
Exp. time : red 1x60s, green 1x60s, blue 1x60s.
Image process tool : Meade, Corel Draw.
Processing : An early processed image with a not so advanced program, oversaturated core. I had to do something about it, I spent 2 years to develop my own image processing tool in Matlab to do this. Even if it today sound that it was small size images with 1024x1024 pixels it give the computer nuts to do it.
Comment : The bright star just to the left and bottom is Polaris.

The comet is big with its tail, moon has a diameter of 0.5 degree this image is about 12 degree wide!

Hyakutake C/1996 B2 color on tripple CCD filter 1996
Object : Comet Hykutake C/1996 B2
Date : 1996-03-24
Time (UT) : 22:00 to 22:15
Lens/telescope : Nikon 50mm f1.4 (f2.0)
Filter : Red=25, Green=58 and Blue=47B filter
Camera : Spectra Source Instruments HPC-1, mono chrome CCD 1024x1024.
Exp. time : red 3x20s, green 3x20s, blue 3x20s.
Image process tool : Matlab, Corel Draw. All image processing done by my own developed Matlab routines
Processing : align, resize, level, cal dark and gamma image processing
Comment : Now I had bought a set of red, green and blue filter, because I wanted to take color images.

Fast moving, between each color filter change it has moved relative background stars. From this night it had been reported that the tail had reached 35 degrees length. That's about three times more compare to what you can see in this photo.

Hyakutake C/1996 B2 color on tripple CCD filter 1996
Object : Comet Hykutake C/1996 B2
Date : 1996-03-26
Time (UT) : 20:25 to 20:36
Lens/telescope : Nikon 50mm f1.4 (f2.0)
Exp. time : red 1x20s, green 1x20s, blue 1x20s
Image color calibrated with G2-stars as references (our sun is a G2-star)
Comment : Three days later

Hyakutake C/1996 B2 mono chrome on CCD 1996
Object : Comet Hykutake C/1996 B2
Date : 1996-04-08
Time (UT) : 19:20
Lens/telescope : Nikon 50mm f1.4 (f2.0)
Filter : none
Exp. time : 60 seconds
Comment : The last of my images of Hyakutake, now it's fading away, compare the size with the images two weeks earlier. The orbital period is 70000 years.

An early student project at Stockholm University.
More to know :

https://en.wikipedia.org/ wiki/Comet_Hyakutake

http://www2.jpl.nasa.gov/ comet/hyakutake/

You can read more about the comet on Seiichi Yoshida's homepage:
http://www.aerith.net/ comet/catalog/ 1996B2/1996B2.html


Advertisement / Annons:

Go Back