Welcome, Guest

Author Topic: Sungrazer SOLWIND 1  (Read 8035 times)

APODman

  • Universe Sandbox 1 Beta Team
  • *****
  • Posts: 225
    • Astronomic Picture of the Day - Brazil
Sungrazer SOLWIND 1
« on: February 11, 2010, 03:51:14 PM »
"A sungrazing comet is a comet that passes extremely close to the Sun at perihelion - sometimes within a few thousand kilometres of the Sun's surface. While small sungrazers can be completely evaporated during such a close approach to the Sun, larger sungrazers can survive many perihelion passages. However, strong evaporation and tidal forces they experience often lead to their fragmentation."
source: http://en.wikipedia.org/wiki/Sungrazing_comet

In honor of the 30th anniversary, last year,  of the first Sungrazer to be viewed from space I did a small simulation sungrazer called "SOLWIND 1" which shows the impressive approach of this type of comet to the Sun: This comet reached striking distance of 0.0048 AU from the Sun at its perihelion!


"These images were obtained with the SOLWIND white light coronagraph aboard the Air Force Space Test Program satellite P78-1 on 1979 August 30. The left-hand image is the first image showing the comet, while the right-hand image was the last showing the comet's head. Venus is located on the left side of each image."
source: http://cometography.com/lcomets/1979q1.html

Compare the image above to this of the simulation at point of view of Earth:




Apparently he did not survive the approach because it has not been re-emerge from behind the Sun after its perihelion.

As the simulation shows, the hyperbolic orbit of the comet would not collide with the Sun, it would take a great aproximation, this disappearance was probably due to the comet's total defragmentation at closest approach followed by its vaporization:





note: For the simulation to be successful demonstrating their great approximation of the comet with the Sun, is important not increasing the original timestep of the simulation ( patience, patience ;) ) !


note2: In time, NASA last year has just announced a project in which anyone can help in the search for new Sungrazers comets ( and others objects like the eventual remains of hypothetical planet Theia ) in pictures and videos taken by SOHO and STEREO probes.

For more information about this project follow this links:

- http://www.nasa.gov/mission_pages/stereo/news/gravity_parking.html
- http://science.nasa.gov/headlines/y2009/09apr_theia.htm


The official site of the project:
- http://sungrazer.nrl.navy.mil/index.php?p=introduction


The simulation file are attached.


[ ]s

APODman

  • Universe Sandbox 1 Beta Team
  • *****
  • Posts: 225
    • Astronomic Picture of the Day - Brazil
Re: Sungrazer SOLWIND 1
« Reply #1 on: February 11, 2010, 05:17:04 PM »
I've made a little movie of a hypothetical sungrazer comet fragmentation:

-

Interesting to note that the fragments follow the approximate orbital characteristcs ( orbital elements ) of the "parent" object.


[ ]s

atomic7732

  • Global Moderator
  • *****
  • Posts: 3823
  • caught in the river turning blue
    • Paladin of Storms
Re: Sungrazer SOLWIND 1
« Reply #2 on: February 11, 2010, 07:45:48 PM »
Cool.

Dan Dixon

  • Creator of Universe Sandbox
  • Developer
  • *****
  • Posts: 3243
    • Personal Site
Re: Sungrazer SOLWIND 1
« Reply #3 on: February 11, 2010, 08:05:10 PM »
Awesome post and video.

atomic7732

  • Global Moderator
  • *****
  • Posts: 3823
  • caught in the river turning blue
    • Paladin of Storms
Re: Sungrazer SOLWIND 1
« Reply #4 on: February 11, 2010, 08:14:29 PM »
Interesting... It's very intersting that I use NRL for cyclones.

http://nrlmry.navy.mil/

And this is nrl also. I think. Right?

Edit: And where am I supposed to help find comets?

APODman

  • Universe Sandbox 1 Beta Team
  • *****
  • Posts: 225
    • Astronomic Picture of the Day - Brazil
Re: Sungrazer SOLWIND 1
« Reply #5 on: February 12, 2010, 02:23:00 AM »
Interesting... It's very intersting that I use NRL for cyclones.

http://nrlmry.navy.mil/

And this is nrl also. I think. Right?

Edit: And where am I supposed to help find comets?

NeutronStar at the offical site of the project look at right:

"Reporting Objects
Recent Reports
SOHO Objects
STEREO Objects
STEREO L4/L5 Campaign"


This is the campaigns, click in some.  :)

[ ]s

APODman

  • Universe Sandbox 1 Beta Team
  • *****
  • Posts: 225
    • Astronomic Picture of the Day - Brazil
Re: Sungrazer SOLWIND 1
« Reply #6 on: February 12, 2010, 02:25:22 AM »
Awesome post and video.

Thanks Dan !

Attached are the file of the simulation of sungrazer fragmentation for the others users.


[ ]s

« Last Edit: February 12, 2010, 03:40:18 AM by APODman »

Naru523

  • Universe Sandbox 1 Beta Team
  • *****
  • Posts: 1295
  • let's walk the true path of life
Re: Sungrazer SOLWIND 1
« Reply #7 on: February 12, 2010, 08:46:41 AM »
Nice. Never knew comets would go that close. The universe is amazing. :P