Report for 2002-12-06

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Brought to you from beautiful Park City, "View-tah".

Contents

This Weeks Issue The Utah Skies Website

 

 

Astronomical Times (Mountain Standard)

Sunrise: 7:36 am Sunset: 4:59 pm
Astronomical Twilight Begins: 5:58 am Astronomical Twilight Ends: 6:37 pm
Moonrise: 10:17 am Moonset: 7:22 pm

 

Holiday Gift Giving Ideas

Wondering what to get for the astronomer on your holiday shopping list? Checkout our Astronomical Products page for some idea. On it, you'll find descriptions of the various types of telescopes and accessories. Astronomy offers a lifetime of enjoyment. Why not help to start or restart the passion.
 

Viewing Outlook

The Moon along with planets Venus and Mars by Dan BushSkies have been hit or miss at best lately. Here in Park City, we're getting neither the big snow storms needed on the ski slopes nor the clear skies we'd like for stargazing. Basically, this is an unacceptable condition which will have to be changed :) Hopefully you've gotten out on those few clear nights and mornings we have had. I got out briefly Monday morning to take some pictures of a tiny waning crescent moon. At that point, only 3% of the moons surface was illuminated. It was a beautiful sight. Switching to a wider angle lens, I got pictures of the Moon along with the planets Venus and Mars.

This beautiful shot was taken by Dan Bush using a Nikon CoolPix 995. The close-up with Earthshine was brought out with an 8 second exposure through a TeleVue Pronto Telescope. 

 

Space Weather Update

Small sunspots on our starSunspot activity on our star is on the increase. While most of these are small and pose little threat of CME type activity, we'll be keeping an eye out for "the big one".

2001 Solar Eclipse Series by Fred EspenakThis awesome series of images from the June 21, 2001 solar eclipse was taken by Mr. Eclipse, Fred Espenak near Chisamba, Zambia.

On Wednesday, Dec 4th there was another full solar eclipse... again visible from Africa.

A total eclipse of the sunOn Wednesday, skywatchers from around the world converged on a few, key locations in the southern hemisphere to watch one of astronomy's premier spectacles... a total eclipse of the sun. For those fortunate enough to be living in the right location... or to have made the long journey... the event was quite memorable. Unfortunately, this event was visible in southern Africa and Australia. The accompanying image was taken in Ceduna Australia.

Find out more by visiting CNN.com/Space.

A Sun pillar at dawn. Nov. 26, 2002. Credit: Lauri KangasA Sun pillar at dawn. Nov. 26, 2002. Credit: Lauri Kangas

These are pretty neat. I'm sure many of you have seen these for yourself... even if you didn't know what you were seeing. They happen often as the weather gets cold. Ice crystals in the air cause the reflection of the setting sun to appear to shoot up into the sky.

Mission Update

Space WalkingThe International Space Station will make numerous passes over our area this weekend.  To find out when it will make its next pass, visit NASA's Space Flight Website. The ISS is orbits the Earth at about 17,000 miles per hour. At this rate, it circles the Earth 16 times per day.

Spacewalkers hook up $390 million beam: Astronauts used cranes to attach another expensive piece of latticework to the international space station Tuesday, and then a team of spacewalkers went out and wired it up. 
For more info, checkout CNN.com/SPACE 

 

 

Lunar Phase

A waxing crescent moon as imaged by Anthony Arrigo of Utah SkiesWe had a new moon on Wednesday at 12:35am. In the meantime, we'll be under a waxing crescent moon with 8% of the Moon's visible disk illuminated in the sky tonight.

I took the accompanying image in August of 2002 from a campsite at 9400' in the Uinta Mountains of northern Utah. The moon was only 32 hours old at this point!

Visit our Lunar Information Page for even more images and information.

 

Planetary Report

In this section, we visit the planets in the order in which they are currently rising. Of course, we do our best to track down the finest images available. As an added feature, you may also click on any of the planetary images to view a planetary reference page filled with important facts about the planet.
 
Mars, the 4th Planet
 
Rising:   4:15 am
Visual Magnitude: 1.68
Visual Diameter: 4"
Distance: 225 AU
Constellation: Virgo
 
The Red Planet... MarsMars has begun to brighten. While only a small step, this week marks the second small step in Mars return to grandeur. By the summer of 2003, Mars will be bigger and brighter than at any time in the last 5000 years. Get your telescopes ready, we are in for a treat!

 In the mean time, we can live vicariously through the works of some of the finest astrophotographers on the planet... and even beyond the planet. In case you didn't notice, Mars is in the morning sky. We should begin picking it up in the east in the coming weeks. Checkout this sweet image. With Mars beginning to grow and brighten on its way to it's nearest fly by in 5000 years... it's time to start paying attention to Mars again.

 
Venus, the 2nd Planet
 
Rising:   4:20 am
Visual Magnitude: -4.66
Visual Diameter: 40"
Distance: 0.41 AU
Constellation: Virgo
 
The varying phases of VenusVenus has made the shift... It is now rising about 1 hour and 45 minutes before the sun. It has taken up the role as the " morning star".  Look for it shining brightly low in the eastern sky just before dawn. Given it's incredible brightness, it an easy target for observers. Now that Venus is in the morning sky, you can see four planets before sunrise: Venus and Mars and Jupiter and Saturn.

Did you know that Venus goes through phases? No... not those kind of phases... Phases of illumination, like the moon. It's true. Venus is currently about 20% illuminated. When the planet is near the Sun (as it is now) it looks like a thin crescent. Javier Ruiz Fernández of Santander, Spain, captured this image of Venus through an 8" telescope on Nov. 5th. At this point, Venus is pretty cool to look at in a telescope. So... get out there and check it out!

 
Pluto, the 9th Planet
 
Rising:   7:25 am
Visual Magnitude: 13.93
Visual Diameter: <1"
Distance: 31.56 AU
Constellation: Ophiuchus
 
Pluto as imaged by the Nordic Optical TelescopeTake this bit of planetary information either as an interesting side note, or an observing challenge. Pluto is in the constellation Ophiuchus, about 15 degrees north of Mars. At magnitude 13.9, Pluto is basically out of reach of smaller telescopes. One way to verify that you have found Pluto is to sketch the star patterns over several nights. If you have actually found Pluto, one of the the faint star-like objects will have moved over the course of a few nights. This is Pluto.


Pluto orbits the Sun at about 30 times the distance of the Earth - nearly 2.75 billion miles away. The image at right is one of the best ground based images I have ever seen so don't expect to see any surface detail. Merely seeing Pluto is an accomplishment.

The accompanying image was taken by the Nordic Optical Telescope.

 

 
Mercury, the 1st Planet
 
Rising:   8:50 am
Visual Magnitude: -0.56
Visual Diameter: 5"
Distance: 1.35 AU
Constellation: Sagittariius
 
A high resolution image of Mercury by Boston UniversityThe accompanying image of the planet Mercury is one of the highest resolution images every taken from Earth. Taken by the Imaging Science Team at Boston University, this images seriously pushes the envelope. Anybody who's ever viewed Mercury through a telescope knows what I mean.

Mercury is quite the illusive object for amateur astronomers. Since it is the innermost planet, it never gets far enough away from the Sun to be seen in dark skies. Additionally, views along the horizon are typically the most turbulent. So... simply seeing Mercury is about the best you can hope for.

Mercury is currently in the constellation Sagittarius and can now be seen above the south western horizon shortly after sunset. Best views of the fleet footed planet will be had towards the end of the month.

Mercury has recently moved into the constellation Ophichus.

 
Neptune, the 8th Planet
 
Rising:   11:20 am
Visual Magnitude: 7.95
Visual Diameter: 2"
Distance: 30.65 AU
Constellation: Capricornus
 
A beautiful shot of NeptuneHow's this for a cool shot of Neptune? Clearly visible is Neptune's Great Dark Spot..

Neptune is a relatively easy target when viewed at the right time... and that time is winding down! Neptune has been at its best throughout the fall. It is high in the western sky at dark, so... get on it early. Almost star-like in binoculars, it shows it's beautiful blue color in telescopes. Neptune gets this beautiful blue coloring from a layer of Methane in its upper atmosphere. Located over 2.84 billion miles from Earth, Neptune has a huge circular orbit -- taking just over 164 years to orbit the Sun. In fact, Neptune's orbit varies by less than 1% from circular. Neptune has a couple of other claims to fame... It has the fastest wind speeds in the solar system with gust at almost 1500 mph.
Similar to Jupiter, Neptune is categorized as a gas giant. Neptune is roughly 17 times more massive than the Earth. In another similarity to Jupiter, Neptune has a  Great Dark Spot. William Herschel is credited with the discovery of Neptune in 1781. However, it had been recorded in several catalogs as a star as far back as 1690.

 
Uranus, the 7th Planet
 
Rising:   12:10 pm
Visual Magnitude: 5.86
Visual Diameter: 3"
Distance: 20.31 AU
Constellation: Capricornus
 
A fine image of Uranus by the Hubble Space TelescopeThe recent discovery of Uranus' 21st moon solidified its number three position in the moon count behind Saturn with 30 and Jupiter with 39. Uranus is currently about 2.6 light-hours away. That's right... Light hours... the distance light travels in 2.6 hours. Uranus is just about visible to the naked eye... depending on how dark your skies are of course. This means its an easy target for binoculars or a telescope. I saw Uranus recently. While sweeping for it using low powers Uranus looked like a strange star. The reason for this is that Uranus resolves to a disk... not just a point source of light like a star. As I increased the power I was able to determine without a doubt that I was observing the 7th planet. It appeared as a very pale blue disk. As it was less than an ideal night for observing, none of its faint moons were visible. I suspect that on a better night... from darker skies that I would have been able to spy at least the brightest moon Miranda... though at mag 16.5 it would certainly be a stretch.
Checkout this shot of Uranus. It was taken by the Hubble Space Telescope. It clearly shows the rings of Uranus as well as a handful of Uranus' moons.  Uranus is another relatively easy target to find. It is just about at its highest as darkness falls. So... checkout Neptune and then move on the Uranus. Uranus is another tiny planet at only 4"... and given it's tiny size, It displays absolutely no surface detail. It does however show it's beautiful aquamarine color. Uranus also gets its beautiful coloring from a layer of Methane in its upper atmosphere. Located over 1.92 billion miles from Earth, Uranus has a huge orbit -- taking just over 84 years to orbit the Sun. It is categorized as a gas giant as is Jupiter, Saturn and Neptune. Uranus is roughly 14 times more massive than the Earth. Discovered by William Herschel in March of 1781, Uranus was the first planet to be "discovered". All the others are plainly visible, and hence have been known since antiquity. The name Uranus was suggested for mythological reasons. Since Jupiter was the father of Saturn, it made sense to name the next planet out Uranus -- the father of Saturn.
 
Saturn, the 6th Planet
 
Rising:   5:50 pm
Visual Magnitude: -0.42
Visual Diameter: 21"
Distance: 8.07 AU
Constellation: Taurus
 
Saturn as imaged by the Voyager SpacecraftSaturn is now rising before 7:00pm and is well positioned by about 10:00pm, giving planetary viewers a nice bedtime treat. It can be found high, almost overhead just before dawn. Given that it's dark until almost 6:30am, you should have no problem getting out to view the ringed planet when you wake up. You'll find it fairly high in the western sky... though best views are now had in the evening. Saturn can be found about 15° north of Betelgeuse... the alpha star in Orion.
Did you know that the rings are visible in binoculars? It's true. You'll have to hold it extremely steady... or maybe even mount it on a tripod, but.. they are visible.

The accompanying picture of Saturn was taken by Calvin J. Hamilton and the Voyager spacecraft imaging team.

Saturn is now cruising through the constellation Taurus.

  

Jupiter, the 5th Planet

 
Rising:   9:50 pm
Visual Magnitude: -2.34
Visual Diameter: 41"
Distance: 4.78 AU
Constellation: Leo
 

A awesome shot of Jupiter's Great Red Spot by the Hubble Space TelescopeWOW!!!!!
This incredibly detailed image shows the beautiful cloud top of Jupiter. Many of these features are visible in amateur telescopes on nights of good seeing. Also visible in the shot is Jupiter's most obvious feature... the Great Red Spot, which can be seen slightly to the right of center.

Jupiter is currently in western Leo.

 

Hubble Vision

The Hubble Space Telescope has distinguished itself as a premier source of astronomical images. Amazing HST images have graced the covers of major magazines and newspapers worldwide. In recognition of the amazing advances in astronomy and physics which have come from Hubble discoveries, we'd like to devote a section of this report to some of these incredible images, and share some of them with you. Our latest comes directly from the Hubble Heritage Team.

We've got a special treat for you in this weeks Hubble Vision section. These are the first shots made public from the new camera installed in the Hubble Space Telescope. I'm sure you'll agree that these shots are even more impressive than previous Hubble products.

The Double Bubble as imaged by HST Hubble Photographs 'Double Bubble' in Neighboring Galaxy

A unique peanut-shaped cocoon of dust, called a reflection nebula, surrounds a cluster of young, hot stars in this view from NASA's Hubble Space Telescope. The "double bubble," called N30B, is inside a larger nebula. The larger nebula, called DEM L 106, is embedded in the Large Magellanic Cloud, a satellite galaxy of our Milky Way lying 160,000 light-years away. The wispy filaments of DEM L 106 fill much of the image. Hubble captures the glow of fluorescing hydrogen and sulfur, as well as the brilliant blue-white colors of the hot stars. 
The very bright star at the top of the picture, called Henize S22, illuminates the dusty cocoon like a flashlight shining on smoke particles. This searing supergiant star is only 25 light-years from the N30B nebula. Viewed from N30B, the brilliant star would appear 250 times as bright as the planet Venus does in Earth's sky. 
Lowell Observatory astronomer M.S. Oey and University of Illinois astronomer Y.-H. Chu are members of a science team studying DEM L 106. Along with their collaborators, Oey and Chu have made a clever use of the reflection nebula around N30B. By obtaining spectroscopic observations at various points across the nebula, they can study the spectrum of S22 from different angles. Remarkably, they have found that the star's spectrum changes with the viewing angle, suggesting that the star is surrounded by a flattened disk of gas expelled from its equator. 
Astronomers R. Davies, K. Elliot, and J. Meaburn, who created the "DEM" catalogs of both the Large and Small Magellanic Clouds, originally cataloged DEM L 106 in the 1970's. N30B was discovered in the 1950s by astronomer K. Henize, who later became a NASA astronaut. 
DEM L 106 was imaged with Hubble's Wide Field Planetary Camera 2 (WFPC2). Hubble data taken in 1998 were combined with data taken by the Hubble Heritage Team in late 2001. 

Credit: NASA and The Hubble Heritage Team (STScI/AURA)
Acknowledgment: M.S. Oey (Lowell Observatory) and Y.-H. Chu (U. of Illinois) 

If you are able to find all of these objects, you may be one of the few, the proud, the Deep Sky Obsessed. 
E-mail your findings to DeepSkyObservations@UtahSkies.org.

 

IDA-Utah Light Pollution Update

 
Utah Skies. A valuable resource for astronomers. Lots of astronmy images, star charts and The Weekly Utah Skies Report. Also, a great light pollution resource

Stay up to date on astronomical happenings by regularly checking the Utah Skies website at http://www.UtahSkies.org  

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