Supernovae... again ;)

The supernovae thread got me thinking...

When was the last naked eye, daylight visible supernovae?

Thanks

Noz
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Email nozza underscore wales at yahoo co uk

Nozza wrote:
When was the last naked eye, daylight visible supernovae?

Probably the Crab (1054AD).

Best,
Stephen

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On Mon, 12 Apr 2004 16:02:23 +0100, Stephen Tonkin
wrote:

Nozza wrote:
When was the last naked eye, daylight visible supernovae?

Probably the Crab (1054AD).

It was cloudy at 5 to 11 this morning so I guess I missed it

When's the next one due?

--
Pete Lawrence
http://www.pbl33.co.uk
Astronomy and digital imaging website (last update 28-03-04)

Stephen Tonkin wrote:

Nozza wrote:
When was the last naked eye, daylight visible supernovae?

Probably the Crab (1054AD).

Best,
Stephen

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They were novae, not super, but Tycho's and Kepler's stars were very
bright.

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Martin Frey
http://www.hadastro.org.uk
N 51 02 E 0 47

"Martin Frey" wrote in message
...
Stephen Tonkin wrote:

Nozza wrote:
When was the last naked eye, daylight visible supernovae?

Probably the Crab (1054AD).

Best,
Stephen

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They were novae, not super, but Tycho's and Kepler's stars were very
bright.


No, these were definitely supernovae. I think Tycho's (1572) was visible in
daylight; it was as bright as or brighter than Venus.

--
Mike Dworetsky

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Nozza wrote:
The supernovae thread got me thinking...

When was the last naked eye, daylight visible supernovae?

For a nice line-up:

http://www.astronomy.com/Content/Dyn...1/612rxrif.asp

Grtz

On Mon, 12 Apr 2004 17:11:50 +0200, Cees van Vliet
wrote:

Nozza wrote:
The supernovae thread got me thinking...

When was the last naked eye, daylight visible supernovae?

For a nice line-up:

http://www.astronomy.com/Content/Dyn...1/612rxrif.asp

I seem to remember that the average period between supernovae in our
Galaxy was quoted as 200 years. The list you presented shows 5
definite supernovae from 1006 so I guess the average was calculated
from this. Hmmm - we're well overdue now then.

--
Pete Lawrence
http://www.pbl33.co.uk
Astronomy & digital astroimaging

Pete Lawrence wrote in message . ..

I seem to remember that the average period between supernovae in our
Galaxy was quoted as 200 years. The list you presented shows 5
definite supernovae from 1006 so I guess the average was calculated
from this. Hmmm - we're well overdue now then.

I can't see that holding up to statistical analysis :O)

Gaz

"Pete Lawrence" wrote in message
...
On Mon, 12 Apr 2004 17:11:50 +0200, Cees van Vliet
wrote:

Nozza wrote:
The supernovae thread got me thinking...

When was the last naked eye, daylight visible supernovae?

For a nice line-up:


http://www.astronomy.com/Content/Dyn...1/612rxrif.asp

I seem to remember that the average period between supernovae in our
Galaxy was quoted as 200 years. The list you presented shows 5
definite supernovae from 1006 so I guess the average was calculated
from this. Hmmm - we're well overdue now then.

--
Pete Lawrence
http://www.pbl33.co.uk
Astronomy & digital astroimaging

200 years is the average spacing between observed Galactic supernovae. But
most of our Galaxy is hidden from optical view by dust clouds. The
estimates of total frequency per galaxy of the same size as ours is more
like every 30-60 years. Just that we can't see any but the closest (3-5
kpc) as a bright transient star.

--
Mike Dworetsky

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On Tue, 13 Apr 2004 21:33:39 +0000 (UTC), "Mike Dworetsky"
wrote:

200 years is the average spacing between observed Galactic supernovae. But
most of our Galaxy is hidden from optical view by dust clouds. The
estimates of total frequency per galaxy of the same size as ours is more
like every 30-60 years. Just that we can't see any but the closest (3-5
kpc) as a bright transient star.

Thanks for the update Mike. Is there any observational evidence to
backup the 30/60 year frequency estimate or is is based on theoretical
models (or presumably extrapolation from the observed events)?
--
Pete Lawrence
http://www.pbl33.co.uk
Astronomy & digital astroimaging