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blobrana
Posted on: Aug 6 2012, 02:33 PM


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QUOTE (jmknapp @ Aug 6 2012, 05:06 PM) *
Looks like it'd be on the far outskirts of the much-discussed alluvial fan


Good work on the the coordinates.

  Forum: MSL · Post Preview: #187042 · Replies: 1152 · Views: 962148

blobrana
Posted on: May 15 2008, 12:36 AM


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RE: >> bit of a red herring

Hum,
not really as this discovery goes some way towards solving why the rate of supernova explosions appears to be so low.
ie There should be on average three supernovas every century given that we live in a large spiral galaxy - but we don't see that number of supernova remnants. A mystery that has bugged astronomers for over 50 years.
It now seems that the remnants were just overlooked, or unseen due to their wavelengths.
  Forum: Telescopic Observations · Post Preview: #113604 · Replies: 41 · Views: 31495

blobrana
Posted on: May 10 2008, 11:30 AM


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QUOTE (mps @ May 10 2008, 03:41 AM) *
My first thought was also that it could be a supernova


Hum,
indeed.

The word on the street says says it's the identification of Type Ia Supernova progenitors.
  Forum: Telescopic Observations · Post Preview: #113341 · Replies: 41 · Views: 31495

blobrana
Posted on: Dec 9 2007, 02:57 PM


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A preliminary launch date has now been set for 2 January, 2008.
  Forum: Manned Spaceflight · Post Preview: #105370 · Replies: 80 · Views: 90289

blobrana
Posted on: Dec 7 2007, 07:15 PM


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The launch has been rescheduled for Saturday 20:43 GMT, (3:43 pm EST), 8th December.
  Forum: Manned Spaceflight · Post Preview: #105247 · Replies: 80 · Views: 90289

blobrana
Posted on: Aug 16 2007, 08:02 PM


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Hum,
yeah, perhaps its a re-entering delta 2 rocket...


< EDIT>
i just ran a sim and can rule out a delta 2 rocket body that was due to crash, (the timing and location don't match).
  Forum: Chit Chat · Post Preview: #96970 · Replies: 5 · Views: 5519

blobrana
Posted on: Aug 16 2007, 06:29 PM


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@ugordan
Since the SL-6 is quite large ill watch the data and post an predicted landing site nearer the time
  Forum: Earth Observations · Post Preview: #96962 · Replies: 9 · Views: 10958

blobrana
Posted on: Aug 16 2007, 02:55 PM


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A Molniya-M SL-6 (Stage 3) Rocket Body that was launched from the Plesetsk Cosmodrome for the Molniya 1-78 mission on the 10th August 1990, is predicted to re-enter the Earths atmosphere on the 19th August @ 17:51 UTC ± 25 hours.

Predicted Decay Location 31° 48` N, 10° 48` E
Inclination 61.4°
Revolution Number 12427

TLE Data
CODE
SL-6 R/B(2)
1 20745U 90071D   07228.50588499  .25937346  17159-4  44544-3 0    94
2 20745 061.4239 095.8964 1582773 270.4675 070.0695 12.89249173123841
1 20745U 90071D   07228.03788120  .27199724  16181-4  43563-3 0    79
2 20745 061.4310 097.1048 1689604 270.2695 078.2154 12.65444992123783
1 20745U 90071D   07228.03788120  .27199724  16181-4  43563-3 0    80
2 20745 061.4310 097.1048 1689604 270.2695 078.2154 12.65444992123783
1 20745U 90071D   07227.55660042  .23183311  15033-4  45381-3 0    62
2 20745 061.4345 098.2933 1815130 270.0762 069.3532 12.36074633123728
1 20745U 90071D   07227.31281239  .23224376  14612-4  37328-3 0    53
2 20745 061.4300 098.8757 1870867 269.9180 069.5906 12.24665665123699
  Forum: Earth Observations · Post Preview: #96950 · Replies: 9 · Views: 10958

blobrana
Posted on: Aug 16 2007, 12:46 PM


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QUOTE
This is a single, unprocessed frame (CCD) from the morning of August 16, showing no less than 13 individual components of some type of catastrophic event recorded when a routine image of the new asteroid 2007 PP9 was being captured...


Read more
  Forum: Chit Chat · Post Preview: #96938 · Replies: 5 · Views: 5519

blobrana
Posted on: Aug 16 2007, 12:21 PM


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Hum,
no fooling you guys....yes the meteor is a sunlit vapour trail...(i had been fooled by similar images like that before; but in this case in the blown up jpeg images the plane can be clearly be seen)

Anyway...

Re-entry update:
16th August @ 09:23 GMT ± 1 minute
Predicted Decay Location 59° S, 329° E
Inclination 98.3°
Revolution Number 1093
  Forum: Earth Observations · Post Preview: #96936 · Replies: 9 · Views: 10958

blobrana
Posted on: Aug 16 2007, 02:29 AM


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Hum,
something like this meteor seen over Bogota Colombia on July 26th, 2007, at 18:10 local time...

YouTube Video

But it should be said that currently the satellite data is very unconstrained - so it could land anywhere along that orbit...
  Forum: Earth Observations · Post Preview: #96922 · Replies: 9 · Views: 10958

blobrana
Posted on: Aug 15 2007, 09:42 PM


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A Delta II Stage 2 Rocket Body that was launched from the Vandenberg Air Force Base for the COSMO 1 mission on the 8th June 2007, is predicted to re-enter the Earths atmosphere on the 16th August @ 06:48 UTC ± 4.4 hours.

Predicted Decay Location 11° 04` N, 1° 34` E
Inclination 98.4°
Revolution Number 1093

TLE Data

CODE
DELTA 2 R/B
1 31599U 07023B   07227.54921531  .05218918  32407-5  34514-3 0  1848
2 31599 098.3529 068.8757 0042820 027.9764 332.4482 16.35174104 10781
1 31599U 07023B   07227.42677306  .04259024  32130-5  33342-3 0  1835
2 31599 098.3548 068.7131 0045128 028.3349 332.0314 16.33952043 10767
1 31599U 07023B   07227.36550842  .04240378  32103-5  36169-3 0  1824
2 31599 098.3548 068.6333 0045891 028.5631 331.7294 16.33417609 10759
1 31599U 07023B   07227.24295506  .05365045  32555-5  42688-3 0  1817
2 31599 098.3597 068.4721 0051518 029.4863 330.9231 16.32632022 10739
1 31599U 07023B   07226.93623086 +.03784562 +31931-5 +43686-3 0 01813
2 31599 098.3578 068.0711 0056056 029.8255 330.6209 16.30074067010687
  Forum: Earth Observations · Post Preview: #96909 · Replies: 9 · Views: 10958

blobrana
Posted on: Aug 14 2007, 07:00 PM


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Astronomers are scheduled to announce new findings about a star unlike any seen before at a media teleconference Wednesday, Aug. 15, at 17:00 GMT (1 p.m. EDT). The findings are from NASA's Galaxy Evolution Explorer, managed by NASA's Jet Propulsion Laboratory in Pasadena, California, US.

The briefing participants are:
- Christopher Martin, principal investigator of the Galaxy Evolution Explorer, California Institute of Technology, Pasadena, California.
- Mark Seibert, astronomer, Observatories of the Carnegie Institution of Washington, Pasadena, California.
- Michael Shara, curator at the American Museum of Natural History and professor of astronomy at Columbia University, both in New York

Read more (live tomorrow)
  Forum: Conferences and Broadcasts · Post Preview: #96856 · Replies: 7 · Views: 7599

blobrana
Posted on: Jul 21 2006, 01:28 PM


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A BBC Horizon programme puts forward a very persuading case that the Kebir crater was not the origin of the desert glass, rather it was formed by an airburst of a much smaller 100 metre sized asteroid.

The airburst generated temperatures similar to the sun, and blew a huge plume of gas out into space. The glass wasn't from a crater or it's ejecta, if a crater is formed at all , but from the fireball that blasted huge areas of the surface.

Read more


@Bob Shaw
The program also touched upon the formation of Australites and Indochinites - no crater needed - just a loose rubble pile of an asteroid that air blasted south east Asia. The early humans and species like Gigantopithecus blackii would have been incinerated.
  Forum: Earth Observations · Post Preview: #62283 · Replies: 36 · Views: 60628

blobrana
Posted on: Jun 9 2006, 03:35 PM


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Hum,
Northern Norway was hit with an meteorite impact comparable to the atomic bomb on Wednesday, 7th June, 2006.
For several seconds, residents of the northern part of Troms and the western areas of Finnmark saw a ball of fire crossing the sky.
A few minutes later an impact was heard and geophysics and seismology stations in Karasjok registered a powerful sound and seismic disturbances at 02:13.25 a.m.
The meteorite hit a mountainside in Reisadalen in North Troms, and was probably the largest known to have struck Norway.

Latitude 69.498379° Longitude 21.428999°
(As the actual impact site hasn't been found the attached image is centred on Reisadalen.)
  Forum: Earth Observations · Post Preview: #57771 · Replies: 36 · Views: 60628

blobrana
Posted on: Jun 3 2006, 12:47 PM


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Hum,
i too seem to recall that it was once speculated that the Bay was formed by an impact.
However it may be that they hadn't found the Chesapeake bay impact structure.

(35 million years ago, a meteorite smashed a 83 kilometre hole in Earth's surface.)

But i agree that it is just speculation as to what the gravity anomaly is. If it is an impact crater then it could date from 545 million years ago, (an upper limit of 100 million years is dictated by a tectonic fault line that cuts through the feature). Personally i think it`s an old caldera.

BTW Another intriguing `crater` worth looking at in Canada (with say google earth) is at
Position: Latitude 76.628177° Longitude -109.037557°
  Forum: Cometary and Asteroid Missions · Post Preview: #56856 · Replies: 21 · Views: 25729

blobrana
Posted on: May 28 2006, 06:51 PM


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QUOTE (Bob Shaw @ May 28 2006, 09:57 PM) *
I seem to remember that picture of the 'airburst' turned up on APOD, but then got debunked!


Hum,
looked real to me...

http://news.bbc.co.uk/1/hi/wales/south_east/3155928.stm
  Forum: Earth Observations · Post Preview: #56073 · Replies: 36 · Views: 60628

blobrana
Posted on: May 27 2006, 10:51 PM


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Hum,
just for the record - (i can`t find this information anywhere on the net!)...The location of Darwin Crater is at

Latitude = -42.30483 Longitude = 145.65883

Small IMAGE
  Forum: Earth Observations · Post Preview: #56003 · Replies: 36 · Views: 60628

blobrana
Posted on: Apr 25 2006, 07:50 PM


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QUOTE (ljk4-1 @ Apr 25 2006, 10:41 PM) *
"Sedna", demonstrate the possibility that our sun might be part of a binary star system.


Hum,
the orbit of Sedna surly points to the possibility that our sun is rather unique in being a solitary star...
  Forum: Sun · Post Preview: #51775 · Replies: 31 · Views: 56558

blobrana
Posted on: Mar 17 2006, 01:23 PM


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Hum,
i ve just remembered another possibility for the Australites.

“An asteroid between 5 - 11 km across had broken up in the atmosphere and five large pieces had hit the Earth, creating multiple craters over an scatter ellipse area in Antarctica.
Scatter ellipses such as this accompany all such multiple impact sites, except that the Antarctic ellipse is the largest known on Earth. Of the five new impact craters, three of them are on the continental land mass and two more are in the Weddell Sea. The largest of these craters is about 322km by 322km.
The Antarctic scatter ellipse is of enormous size by Earth standards, measuring some 2,092 kilometres by 3,862 kilometres. Melted rocky debris, blasted from such meteoroid craters upon impact and explosion, and known as tektites, may have been carried thousands of kilometres from the impact site. Such tektites, called australites, are found in large strewn fields in Australia some 5600 kilometres from the largest proposed impact sites in the Ross Sea region.

The impacts occurred roughly 780,000 years ago during an ice age. When the impacts hit, they would have melted through the ice and through the crust below.”

Read more (PDF)

Web link:

Another weblink:

A recent weblink:
  Forum: Earth Observations · Post Preview: #46110 · Replies: 36 · Views: 60628

blobrana
Posted on: Mar 7 2006, 01:49 PM


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QUOTE (edstrick @ Mar 7 2006, 03:37 PM) *
but there's no sign of a source crater anywhere

Hum,
Yeah a bit of a mystery there...

Australites (and Indochinites which are indistinguishable from each other) have been dated to about 710,000 years using fission track and potassium-argon (K-Ar) dating methods; However the stratigraphic positions indicates an age of 7000 to 20,000 years BP.
From their chemical composition, both belong to the same impact event...!

The evidence seems to show a least two episodes of australite falls - one relatively recent (24,000 and 16,000 years ago) and at 710,000years. (It could be influenced by sorting by ie Early man)
Australites are also unusual in that some show that they were remelted; this may show different trajectories - sending some material into orbit...

Darwin glass from South West Tasmania has a combined K-Ar and fission track age of 730,000 +/- 40,000 years. It seems that Darwin crater was the source of both.
I would also add that it is possible that the impact crater may be part of two or more events that occurred together. Another associated impact crater could have been formed in the Indonesian region.
A larger impact crater that still has to be found...
Darwin Crater has a diameter of 1 km


Expand
(This is a possible location - can someone confirm?)
-42.249599° 145.555629°

(i`ve posted another location (42°18.39'S, 145°39.41'E) at googlehacks though)

http://www.grisda.org/origins/04076.htm
  Forum: Earth Observations · Post Preview: #44423 · Replies: 36 · Views: 60628

blobrana
Posted on: Mar 6 2006, 10:53 PM


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Hum,
Well i suppose that the relatively recent date may shock a few people, and that it have been controversial a few years ago...
But, Dallas Abbott of the Lamont-Doherty Earth Observatory (LDEO) and her colleagues analysed melt water from nine samples taken from the West Antarctic Siple Dome ice core that date between 1440 and 1448 A.D. and found high values of potassium and calcium as well as impact glass, microcrystalline magnetite, minerals and five microfossils corresponding to the 1443 A.D. level.
Several pieces of evidence point to Mahuika as the source ...


http://www.earth2class.org/k12/w8_s2004/content.htm
http://www.usnews.com/usnews/culture/artic...8/8meteor_2.htm
http://abob.libs.uga.edu/bobk/ccc/cc120403.html
  Forum: Earth Observations · Post Preview: #44364 · Replies: 36 · Views: 60628

blobrana
Posted on: Mar 6 2006, 07:18 PM


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QUOTE (volcanopele @ Mar 6 2006, 11:17 PM) *
Did some google searches. Looks like this is complete garbage (I figured as such, an impact of that size would be kinda noticeable.


LOL,
i posted that garbage...

Take it from me that the evidence is there....(yes really)


Hum,
i found this in a few clicks

random link
  Forum: Earth Observations · Post Preview: #44333 · Replies: 36 · Views: 60628

blobrana
Posted on: Dec 12 2005, 04:56 PM


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>>millions of gallons

70 millions of gallons exploded.
One explosion measured 2.5 on the Richter scale - its the biggest European fire since WW2.
  Forum: Earth Observations · Post Preview: #30941 · Replies: 20 · Views: 25604

blobrana
Posted on: Dec 6 2005, 08:17 PM


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QUOTE (ljk4-1 @ Nov 15 2005, 10:27 PM)
Don't forget "Planetoid" 1991 VG:


Hum,
1991 VG was the rocket body...

Anyway don`t forget 2003 YN107



and 2002 AA29
  Forum: Earth Observations · Post Preview: #30170 · Replies: 9 · Views: 14552

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