http://www.jpl.nasa.gov/news/news.php?release=2013-063
NASA Releases Radar Movie of Asteroid 2012 DA14
Jet Propulsion Laboratory
February 19, 2013
[Image]
This collage of 72 individual radar-generated images of asteroid 2012
DA14 was created using data from NASA's 230-foot (70-meter) Deep Spac
In case you are thinking of trying to observe the near miss, it will
occur at mid-day in North America, so no chance of observing it there.
Your best chance will be in Asia where it will be as bright as magnitude
8. The cut-off for a naked-eye object is magnitude 6, but under perfect
conditions
On 9/02/13 2:26 AM, Greg Dolkas wrote:
Is the 435KW an EIRP number, or power into their feed. I was thinking the
later. No?
If you read the link that was recently posted, their transmitter uses
2x250kW klystrons, so it'd be RF power. :)
--
73 de Tony VK3JED
http://vkradio.com
__
Is the 435KW an EIRP number, or power into their feed. I was thinking the
later. No?
Greg. KO6TH
On Feb 8, 2013 6:53 AM, "Robert Bruninga" wrote:
>
> > I wonder what 435kw at 28,000 km will do to the surface temperature on
> that rock?
>
> Let's see, power goes down as 1/R squared. So lets com
> I wonder what 435kw at 28,000 km will do to the surface temperature on
that rock?
Let's see, power goes down as 1/R squared. So lets compare it to a
candle. A candle is about 50 Watts or about (435000/50W) or about 10,000
times less power. Take the square root of that to get about 100/th the
I wonder what 435kw at 28,000 km will do to the surface temperature on
that rock? (Assuming it's an icy thing...)
Greg KO6TH
Vince Fiscus, KB7ADL wrote:
At 09:01 AM 2/8/2013 +1100, Tony Langdon wrote:
On 8/02/13 7:49 AM, Bob- W7LRD wrote:
maybe "asteroid bounce"? (EAE)
73 Bob W7LRD
Someone
sat-bb] Re: Close encounters of the Asteroidal Kind
On 8/02/13 9:33 AM, Vince Fiscus, KB7ADL wrote:
Well from the original post:
The Goldstone 70M dish will be running MAX QRO with 435 kW.
That ought to be enough for EAE. H. CQ asteroid, CQ asteroid!
There's your 51+ dB! :D S
On 8/02/13 11:11 AM, Andrew Glasbrenner wrote:
I wonder if they considered that it may be significantly more reflective?
I can't see it being more than 15-20db to get from the moon's
reflectivity to a perfect reflector. Still, every bit helps. :)
--
73 de Tony VK3JED
http://vkradio.com
_
On 8/02/13 9:33 AM, Vince Fiscus, KB7ADL wrote:
Well from the original post:
The Goldstone 70M dish will be running MAX QRO with 435 kW.
That ought to be enough for EAE. H. CQ asteroid, CQ asteroid!
There's your 51+ dB! :D Slightly outside amateur power levels or the
antennas avail
I wonder if they considered that it may be significantly more reflective?
73, Drew KO4MA
Sent from my iPhone
On Feb 7, 2013, at 5:01 PM, Tony Langdon wrote:
> On 8/02/13 7:49 AM, Bob- W7LRD wrote:
>> maybe "asteroid bounce"? (EAE)
>> 73 Bob W7LRD
> Someone on the moonbounce reflector crunched
At 09:01 AM 2/8/2013 +1100, Tony Langdon wrote:
On 8/02/13 7:49 AM, Bob- W7LRD wrote:
maybe "asteroid bounce"? (EAE)
73 Bob W7LRD
Someone on the moonbounce reflector crunched the numbers and came up with
a path loss figure something like 51dB worse than EME, if I recall. The
small cross sect
On 8/02/13 7:49 AM, Bob- W7LRD wrote:
maybe "asteroid bounce"? (EAE)
73 Bob W7LRD
Someone on the moonbounce reflector crunched the numbers and came up
with a path loss figure something like 51dB worse than EME, if I
recall. The small cross section area was the killer.
Still, nothing ventured
maybe "asteroid bounce"? (EAE)
73 Bob W7LRD
- Original Message -
From: "Vince Fiscus, KB7ADL"
To: amsat-bb@amsat.org
Sent: Thursday, February 7, 2013 7:18:47 AM
Subject: [amsat-bb] Re: Close encounters of the Asteroidal Kind
At 01:06 AM 2/7/2013 -0500, k.
At 01:06 AM 2/7/2013 -0500, k...@verizon.net wrote:
Next week (Feb 15) the earth will be visited by asteroid 2012 DA14 passing
inside the gestationary satellite orbits. To quote from
http://echo.jpl.nasa.gov/asteroids/2012DA14/2012DA14_planning.html,
2012 DA14 was discovered by the La Sagra Sky
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