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Old 03-05-2013, 07:59 AM  
Hog Farmer Hog Farmer is offline
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Comet PanStarrs / March 12

Looks like we will get a great opportunity to view this comet.
Another one to follow in Novenber may be as bright as the moon.



The outlook brightens for Comet PanSTARRS as sky show shifts
Minoru Yoneto




Observers in the Southern Hemisphere have been watching Comet PanSTARRS for weeks, but the Northern Hemisphere is due to get its first looks at one of the year's most eagerly anticipated sky extravaganzas this week. And there's good news for northerners: The up-and-down expectations for the cometary show are trending upward again.

"In the Southern Hemisphere we have a few days to enjoy it," Argentine photographer Victor Gabriel Bibe, one of many observers who have been tracking the comet's brightening glow, said in an email.

On Tuesday, PanSTARRS makes its closest approach to Earth. On Thursday or so, it should start becoming visible to Northern Hemisphere observers in the western sky, low to the horizon just after sunset. The best photo ops will come March 12 and 13, when PanSTARRS pairs up with the crescent moon. AdChoicesThe brightness of an astronomical object is measured by magnitude, with lower numbers denoting brighter objects. Magnitude +6 is about the limit for naked-eye observations under prime conditions. Magnitude +2 is equivalent to the brightness of Polaris, the North Star. Early on, astronomers said PanSTARRS could get to magnitude zero, putting it in a league with some of the brightest stars in the sky. More recently, they noted that the comet wasn't brightening as quickly as they originally thought and revised the forecast to around +2. Now, the consensus is that it could get to +1 or brighter — maybe not dazzling, but definitely not bad.

"As long as it continues its behavior for a few days, it looks like the Northern Hemisphere — even us city-dwellers — might get a pretty good view of this thing," said Karl Battams of the Naval Research Laboratory in Washington.

The comet was discovered in June 2011 by the Panoramic Survey Telescope and Rapid Response System, or Pan-STARRS, in Hawaii — which helps explain the genesis of its official name, Comet C/2011 L4 (PanSTARRS). The "C" means that the comet is considered a non-periodic newbie, coming in for the first time from the Oort Cloud on the solar system's edge. The "L4" means it was the fourth comet discovered during the first half of June.



NASA


Even though PanSTARRS is still a few days away from Northern Hemisphere visibility, you can take advantage of these tips to maximize your comet-viewing experience:

•Scope out a spot with good western exposure and a minimum of trees, buildings or hills to spoil the view. PanSTARRS won't get very high in the sky, so you'll want to scan the horizon as soon as the sun goes down. But not before! It'd be a tragedy to damage your eyes for the sake of a comet.
•The farther you are from city lights and cloudy weather, the better you'll be able to see the comet. "I was very lucky to observe the comet, because in the area where I live, the weather is very unstable and the sky is always cloudy. Every time the sky clears, I attempt to observe," Bibe said.
•Although the comet is visible to the unaided eye, binoculars will enhance the view — particularly when it comes to seeing the tail. "To the naked eye, this comet has a stellar aspect. But with 10x50 binoculars you can see the tail clearly," Bibe said.
•Once it's visible in the Northern Hemisphere, the comet will rise higher in the sky on each succeeding night. If PanSTARRS follows the expected trend, the viewing should be best between March 10, when it makes its closest approach to the sun, and March 13 or so. After about that time, the glare of the waxing moon could take some of the shine off the comet. PanSTARRS is projected to fade from naked-eye visibility in April.
Advertise | AdChoicesAfter PanSTARRS: ISON
PanSTARRS is the first of two comets expected to take the spotlight this year. The other one is Comet ISON, which has the potential to get much, much brighter than PanSTARRS in November. Some experts are hoping it will equal the brightness of the full moon, although Battams says it's way too early to make firm predictions.

To prepare for ISON's arrival, Battams and other researchers are helping NASA organize a comet observing campaign. "We just want to make sure that all the major observatories are aware of this," Battams said.

ISON is expected to pass as close to the sun's surface as 684,000 miles (1.1 million kilometers), which could produce a dramatic brightening of the comet when it swings back out of the inner solar system. It could produce scientific insights as well.

"Sungrazing comets are unique objects that experience the most extreme thermal and gravitation forces our solar system has to offer them," the campaign's Web page says. "However, rarely do we get to see these objects more than a few hours before their demise. Comet ISON offers us the rare opportunity to study a sungrazer in great detail, for an extended period, and place it in the context of other comets."

For updates on the year of the comets, check in with the "Waiting for ISON" blog as well as SpaceWeather.com and the Remanzacco Observatory website, and follow @ISONUpdates on Twitter.
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Old 03-13-2013, 06:09 PM   #31
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Bump, reminder.
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Old 03-13-2013, 06:33 PM   #32
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Bump, reminder.
Thanks, I was trying to find this thread. Taking my 15 year old out to show him and take some pics
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Old 03-13-2013, 06:53 PM   #33
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Reminds me of when Hale-Bopp showed up in 1997. Unbelievably bright. I still am amazed at how big and bright it was with a halo showing and a huge tail.

I've tried to get a decent look at Pan, but it seems to be lower than the western Oquirrh Mountains on the western edge of the Salt Lake Valley when it's best visible.

Great photos guys.
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Old 03-13-2013, 07:04 PM   #34
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They were saying the comet flying by in November will be as bright as the moon. Hopefully they meant a full moon.
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Old 03-13-2013, 07:08 PM   #35
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Clear sky tonight right up until dusk. Bastard clouds...
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Old 03-13-2013, 07:12 PM   #36
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Clear sky tonight right up until dusk. Bastard clouds...
Same here.
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Old 03-16-2013, 11:13 AM   #37
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CME, Comet and Planet Earth

Image Credit: NRL / SECCHI / STEREO / NASA
Processing - Karl Battams (NRL and @SungrazerComets)

http://apod.nasa.gov/apod/ap130315.html

After appearing in a popular photo opportunity with a young crescent Moon near sunset, naked-eye Comet PanSTARRS continues to rise in northern hemisphere skies. But this remarkable interplanetary perspective from March 13, finds the comet posing with our fair planet itself - as seen from the STEREO Behind spacecraft. Following in Earth's orbit, the spacecraft is nearly opposite the Sun and looks back toward the comet and Earth, with the Sun just off the left side of the frame. At the left an enormous coronal mass ejection (CME) is erupting from a solar active region. Of course, CME, comet, and planet Earth are all at different distances from the spacecraft. (The comet is closest.) The processed digital image is the difference between two consecutive frames from the spacecraft's SECCHI Heliospheric Imager, causing the strong shadowing effect for objects that move between frames. Objects that are too bright create the sharp vertical lines. The processing reveals complicated feather-like structures in Comet PanSTARRS's extensive dust tail.
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