WISE, a mission that will find ALL the neighbours |
WISE, a mission that will find ALL the neighbours |
Jul 10 2010, 08:49 PM
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#91
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Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
I recall reading that the aim is changed to avoid the moon when is at first and last quarter. I suspect they get picked up the next time the moon reaches those phases.
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Jul 17 2010, 01:47 AM
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#92
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Senior Member Group: Members Posts: 1018 Joined: 29-November 05 From: Seattle, WA, USA Member No.: 590 |
They updated the text on the page that shows progress. (Now at 99.5%)
http://wise.ssl.berkeley.edu/sky_coverage.html They say the red stripes result from the moon-avoidance strategy. No mention of the off blue strip, but, somehow, they're covering it now, and they say they'll be at 100% tomorrow. http://www.jpl.nasa.gov/news/news.cfm?release=2010-238 Some highlights: more than one million images so far more than 100,000 asteroids, both known and previously unseen more than 90 new near-Earth objects more than a dozen new comets The first release of WISE data, covering about 80 percent of the sky, will be delivered to the astronomical community in May of next year. Also today, they released a new pic of the Pleiades: http://www.nasa.gov/mission_pages/WISE/new...se20100716.html Cool stuff! --Greg |
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Jul 29 2010, 01:18 AM
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#93
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Senior Member Group: Members Posts: 1018 Joined: 29-November 05 From: Seattle, WA, USA Member No.: 590 |
The WISE coverage map has become much more colorful:
http://wise.ssl.berkeley.edu/sky_coverage.html I wonder what the "16x" factor means? Does it actually mean that the point was imaged on 16 different orbits? --Greg |
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Jul 29 2010, 01:51 AM
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#94
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
I would have thought so - notice the density increasing to the poles. It would have imaged, roughly speaking, the same spot over the north pole every single orbit just about
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Jul 30 2010, 12:35 AM
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#95
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Member Group: Members Posts: 259 Joined: 23-January 05 From: Seattle, WA Member No.: 156 |
It's my understanding that folks looking for planets, comets, KBOs, &c. don't observe high above the ecliptic so much, because of the lesser likelihood of finding anything there. I'm curious to see if WISE manages to snag some interesting findings, especially since it's got so much polar coverage.
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Jul 30 2010, 12:40 AM
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#96
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
There should be a higher probability it will be a comet if they find anything there.
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Jul 30 2010, 03:51 AM
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#97
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
It's also a higher probability it's a NEO. With modest inclinations, if they're close enough, they'll still appear at high angles to the ecliptic.
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Aug 1 2010, 07:48 AM
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#98
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Junior Member Group: Members Posts: 41 Joined: 27-May 09 From: Burgundy Member No.: 4798 |
I find these informations on the comet section of British Astronomical Association, http://www.ast.cam.ac.uk/~jds/ :
Jul 23 WISE discovers asteroid in retrograde orbit Jul 30 WISE discovers short period retrograde asteroid Any more informations about these discoveries ? |
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Aug 1 2010, 08:11 AM
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#99
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Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
A short-period retrograde asteroid?
Wow. That might be the first such ever discovered, esp. if the orbit's anywhere close to the ecliptic plane. Hopefully more info will be forthcoming. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Aug 1 2010, 09:51 PM
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#100
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Member Group: Members Posts: 540 Joined: 17-November 05 From: Oklahoma Member No.: 557 |
The July 23rd discovery was asteroid 2010 OR1, which has a period about 30 years and an inclination around 143 degrees.
The July 30th discovery most likely was actually a reobservation of asteroid 2010 LG61, which was discovered by WISE back in June, but whose orbit at the time was nearly impossible to fit properly. They originally thought it was very small, in a prograde Aten type orbit. WISE got an additional look on the 26th which finally got the orbit right. It is a much larger rock than they thought with a period around 19 years (this is short period?) and inclined 123.7 degrees. I can find no other candidate for the July 30th asteroid. These are impressive, but not record holders. Other examples would be the recently discovered 2010 EB46, found by the Catalina Sky Survey back in March, which has a period 16.7 years and an inclination of 156 degrees, both of which best 2010 LG61. Then you have 2008 SO218, which beats out 2010 OR1 both on period (23 years) and on inclination, which is 170.4 degrees and nearly in the ecliptic going backwards. |
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Aug 2 2010, 10:42 PM
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#101
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Member Group: Members Posts: 259 Joined: 23-January 05 From: Seattle, WA Member No.: 156 |
Hey, thanks for blowing my mind, guys! I had no idea there were short-period retrograde objects. Is the basic idea that these objects started out as long-period retrograde comets and got herded into shorter orbits by Jupiter, or is there a more interesting story behind any of them?
(I note with great amusement that the first-discovered was named Dioretsa! [Retrograde? Dioretsa... think about it.]) |
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Aug 2 2010, 11:20 PM
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#102
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Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
I am likewise impressed & enlightened, Holder! (Yeah, diggin' the name, Gsnorg... )
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Aug 3 2010, 03:23 AM
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#103
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Member Group: Members Posts: 754 Joined: 9-February 07 Member No.: 1700 |
Dioretsa am I? I'm a asteroid!
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Aug 3 2010, 03:32 AM
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#104
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Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
This thing's worth a mission just for the hours of nomenclature fun to be had mapping it.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Aug 11 2010, 04:04 PM
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#105
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Member Group: Members Posts: 540 Joined: 17-November 05 From: Oklahoma Member No.: 557 |
WISE has depleted the coolant in one of its two tanks, and has begun warming up. One detector no longer functioning. All others working for now, and expected to work for some time.
Cooling status report |
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