Report for 2002-02-22

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Welcome to the Utah Skies Report.
Brought to you from beautiful Park City, "View-tah".


Astronomical Times

Sunrise: 7:12 am Sunset: 6:09 pm
Astronomical Twilight Begins: 5:41 am  Astronomical Twilight Ends: 7:40 pm 
Moonrise: 12:57 pm  Moonset: 3:34 am


Viewing Outlook

We came through the previous weekend and the start of the week with a string of beautiful nights. We've since been hit with clouds and snow and generally stormy weather. Oh, well.. it is winter ;) Anyway...


Space Weather Update

Aurora Watch: We are officially in an aurora watch for the next couple of nights. Northern observers under clear skies should keep an eye on the northern horizon for auroral activity... 

Well.. it seemed like solar activity was thinking of subsiding... Perish the thought! Late Sunday night (2/17), a huge solar filament collapsed near the Sun's south pole. This caused an HUGE CME to be hurled into space.  Checkout this amazing SOHO extreme ultraviolet image of the a huge magnetic loop of superheated solar material. 

Additionally, on Wednesday(2/20), sunspot 9825 hurled no less than three CME's into space. While none of these were squarely earth-directed, there are indications that they might deliver glancing blows to the Earth's magnetosphere when they  pass on Friday. Let's hope so. 

Additionally, the Earth was in the midst of a series of solar wind gusts for most of last weekend. Unfortunately, the Interplanetary Magnetic Field (IMF) was tilted towards the north at that time. This is it's most northern light resistant position. Oh, well... let's hope that's changed by the time the CME's arrive ;)

 

Checkout www.Spaceweather.com for up to the minute information on solar activity. 

 

 

 Hey.. wanna checkout some neat images from the last series of auroral activity?  


International Space Station

The International Space Station (ISS) will make several passes over the northern Utah this weekend. The ISS is one of the brightest objects in the sky and can easily be spotted without any optical aids. 

 

SATELLITE
LOCAL
DURATION
MAX ELEV
APPROACH
DEPARTURE
DATE/TIME
(MIN)
(DEG)
(DEG-DIR)
(DEG-DIR)
ISS
Thr Feb 14/07:00 PM
3
20
13 above NNW 17 above NE
ISS
Fri Feb 15/07:38 PM
< 1
53
36 above NNW 53 above N
ISS
Sat Feb 16/06:38 PM
4
29
17 above NNW 11 above E
ISS
Sun Feb 17/07:16 PM
2
79
65 above WNW 25 above SE
ISS
Mon Feb 18/07:53 PM
< 1
16
16 above SSW 13 above SSW
ISS
Tue Feb 19/06:53 PM
2
39
39 above SSW 11 above SSE
The data listed is for SLC. 


Comet Watch:
Introducing Comet Ikeya-Zhang

On February 1st, a new visitor to our solar system was spotted low on the western horizon. Discovered independently by Kaoru Ikeya of Shizuoka prefecture, Japan, Daqing Zhang in Henan province, China,  Comet Ikeya-Zhang is currently cruising north through the constellation Cetus. Astronomers believe that the comet (currently around mag8.5) will brighten significantly in coming months... possibly even to naked eye levels. You can be sure that we'll be following this one closely as it's peak of brightness is expected to be towards April... Just in time for the start of the 2002 Utah Skies Star Party Season.

If you want to get an early jump on viewing Comet Ikeya-Zhang, checkout this ephemeris page

 

Lunar Phase

The moon reached first quarter on Wednesday. It is again growing larger and staying up later each night. Don't fight it. Add the moon to your list of observing targets. It is, after all, the closest celestial object to be viewed... offering up far more detail than any other celestial object. In fact, it looks impressive in virtually any telescope. So... You might as well get to know our closest neighbor.

The accompanying image of the Ray Craters Tycho and Copernicus was taken by Steve Mandel and the Hidden Valley Observatory. Take note of the incredible amount of detail captured in the image. You can see stuff just like this with a modest telescope. So... what are you waiting for????

 

Planetary Report

In this section, we visit the planets in the order in which they are currently rising. We do our best to track down the finest images available. 
for 2002.  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.

Pluto, the 9th planet, is rising at about 2:15 am. At mag 13.92, Pluto is a tiny, faint little spec in a telescope... any telescope. Pluto as imaged by HST It is currently over 2.86 billion miles from Earth. Located in the southeastern sky before sunrise, Pluto is also not very well placed at this point for viewing. You'll have a much better chance of viewing Pluto late in the spring or in the summer.

Mercury
is rising at about 6:05 am. Degas Ray Crater on the inner-most planet, Mercury This is about 75 minutes before the sun rises. You know what that means??? Yup. Mercury will be visible "for a while" in the eastern sky just before sunrise. Have you found it yet? Well... Mercury is a bit south on this pass, making it a difficult object to view from northern locations. Oh, well...

Mercury is always difficult to view. Typically, I'm happy just to see it at all. If I can get a decent telescopic view of it... that's a bonus. What makes Mercury so difficult to view? Well, because it is the innermost planet, Mercury never gets more than 28° away from the Sun. Because of this, Mercury is usually too close to the Sun to be seen at all. On those times when it is further away from the Sun, it is always low on the horizon... the worst part of the sky to view through.

The accompanying image of the Degas Ray Crater shows the incredible amount of meteor bombardment which Mercury has gone through in its history. Since Mercury has no atmosphere, the marks of each and every strike are still visible on the planets surface.


Neptune
, the 8th planet, is rising around 6:15. Shining at mag7.98, Neptune is a relatively easy target. A beaufitul HST image of NeptuneHowever, at only 2", it displays absolutely no surface detail. 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 2.8 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, it 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, is rising at 7:00. A beautiful image of Uranus by HST Shining at mag5.92, Uranus is a relatively easy target. However, this is another tiny planet at only 3".  It is also rising at almost the same time as the sun. So... you'll have to wait a few months to seek it out. Additionally, 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 1.95 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.

Venus
Venus as imaged by The Hubble Space Telescopeis rising about 7:50 am; almost 40 minutes after the sun... Still shining at a blistering mag -3.91 Venus is being completely overwhelmed by the Sun. But, Venus is slowly moving to take up its role as the Evening Star. Watch as it climbs higher and higher in the western sky over the next few months. By late spring, Venus will dominate the night sky. 

Did you know that Venus goes through phases? No... not those kind of phases... Phases of illumination, like the moon. It's true.

Checkout this Ultra Cool... Ultra-Violet image of Venus taken the Hubble Space Telescope.


Mars
is rising in the southeast around  9:20 am. Mars as imaged by Robert Gendler The Earth continues to pull away from Mars in it's orbit. In fact, the distance between the two planets has grown from about 40 million miles this summer to over 175 million miles. This has caused Mars' apparent diameter to shrink. It is currently down to a measly 5".. a fraction of it's peak of 21" in June. It has also dimmed significantly as well - currently shining at a wimpy magnitude 1.23 down from -2.4 in June. 

Mars will return for an even better pass in 2003. In the mean time, we can live vicariously through the works of the Hubble Space Telescope which takes the most amazing astro-images ever seen. If you haven't checked out the Hubble Heritage site, I'd highly recommend it. It's loaded with many awesome planetary and deep sky image that'll blow your mind.

Checkout how much dust is in the air in this image. This is a "planet wide" dust storm. Whole continents all but disappeared. Let's hope for clearer Martian skies on the next pass. 


Saturn
joins us now about 11:35 pm. Look for Saturn almost overhead as it gets dark. Saturn has currently spanning an an impressive 19" -- this is just shy of it's peak size and is currently shining at magnitude 0.04 -- which is also down a bit from its brightest. Don't waste any time... NOW is a great time to view Saturn. It will stick around through the remainder of the winter and into the spring, but.. your views will be best RIGHT NOW. An absolutely amazing mage of Saturn by the Hubble Space Telescope  

We replaced the previous, absolutely amazing image taken by the adaptive optics enabled European Southern Observatory with this even more spectacular Hubble Space Telescope image. Pretty cool, huh?  Look at all the detail captured in the image. Look at how many splits in the ring system have been captured.  What a beautiful image!

Saturn and the moon have been playing a continual game of hide and seek. That's right, Saturn was involved in yet another lunar occultation. This makes the 10th time in less than a year! Saturn will hide behind the moon four more times before May. These events are interesting for more than the chance nature of the event. As Saturn drifts out from behind the dark side of the moon, astronomers are given the opportunity to see some of Saturn's hidden rings. That's right... hidden rings. There are some very extremely faint rings which extend beyond the main rings. NASA spacecraft have photographed them. Occultations offer special opportunities for earthbound residents to observe them. Unfortunately, this event will be missed my residents of northern Utah, with Provo being just inside the grazing limit.


Next, look for Jupiter rising around 1:15pm. It'll be rising along side a beautiful gibbous moon. That ought to make an interesting pairing in the sky. Jupiter is the king of the Planets. It is more massive than all the other planets combined. In fact, Jupiter is over 300 times more massive than the Earth. Not surprisingly, Jupiter also has the largest moon in the solar system, Ganymede. Jupiter is currently shining at mag -2.51 and spans a whopping 44". This is just off from it's peak of 47" earlier this winter... A beautiful image of Jupiter by Peter J. Garbett from Sharnbrook, England
Jupiter is afterall the second most reflective (a quality know as albedo) planet in the solar system. Only Venus reflects more of the sun's light. Add this fact with Jupiter's immense size, and it's no wonder that Jupiter shines so brightly.

On Friday night(2/22) we've got a special treat for you. Jupiter will and the Moon will be separated by less than 1/2° (one moon width). To view this, simply look high and towards the southeast, shortly after sunset. These two objects are the brightest in the night sky, so.. you should have no problem finding them.

Checkout this beautiful image by Astrophotographer Peter J. Garbett from Sharnbrook, England. Wow! This image clearly shows the interaction between Jupiter's Great Red Spot and another huge store, a large white oval. The two storm systems have been interacting for the last few weeks and will continue to do so for several more. Also visible in the image just below the GRS is the shadow of Jupiter's moon Callisto and along the right edge of the image is one of Jupiter's other moons, Ganymede. This is a very cool shot! If you're planning on viewing Jupiter's Great Red Spot, you'll want to checkout this Sky and Telescope article which contains a list of Great Red Spot Transit Times

Many of the features visible in this image are within the reach of modest amateur telescopes. Depending on the size of the telescope and the quality of your skies, you might even do better! In fact, on an amazingly steady night last fall, I did.

I'll remind you again. You have to check out the tools section of the Utah Skies website for a cool java applet which depicts the relative position of the four major Jovian moons and their shadows. It's called JavaJup. I regularly refer to JavaJup to help plan my viewing sessions.


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.

 

Constellation Report

Our Constellation Report is an easy way for people to become familiar with the nighttime sky. We’ll discuss myths associated with a particular constellation as well as describing the numerous deep sky objects residing within its boundaries. No equipment is required to view the constellations, though a star chart can be quite helpful. This ease of observing makes constellations a natural place to begin your journey to the stars. 

This weekend we move on to the constellation Lynx. This is a faint constellation of stars around mag 6. Even Alpha and Beta Lyncis are magnitudes 3.5 and 4.5 respectively. The remainder of the constellation requires good eyesight and very dark skies to make out it's shape. The Lynx is a modern constellation created by the Polish astronomer Johannes Hevelius in 1687. There is no classical mythology associated with the constellation.

The Lynx is a modern constellation created by the Polish astronomer Johannes Hevelius in 1687. There is no classical mythology associated with the constellation.

 

Deep Sky Report

The focus of our efforts this week will be the deep sky objects of Lynx. The Lynx can be found (with good eyesight) due east of the constellation Auriga which we visited a few weeks back and west/southwest of Ursa Major (the big dipper) which we'll visit again in the next few weeks. Don't look for any bright stars to guide you.. there aren't any. A lynx is a sly, secretive creature... and so is this weeks constellation.

for 2002. We've added high resolution star charts for all of our deep sky objects. Along with the map of the constellation which we've always had, clicking on any of the deep sky objects will bring up a high resolution star chart centered on that object. Hope this helps.

 

Ok, let's work south to north and start things off with the southern most object in this weeks report, Spiral Galaxy NGC2683(mag9.75). Click on image to view its star chart This beautiful galaxy is also this weeks brightest object. It is a spiral galaxy viewed nearly edge-on, so we get a very compressed view. You'll notice a bright core region and a bit of the spiral arms, but... nothing like the classic views offered by the face-on galaxies which are up next. 

To find this galaxy, travel about 4.5° north of Alpha Cancri. With an apparent size of about 9.3'x2.5', this is not a tiny object. Still, its mag9.7 is enough to give this a fairly high surface brightness. Once you've found it, it should handle magnification fairly well. Telescopes in the 4-6" range should be able to detect a bit of mottling near the center. Increasing the aperture will bring about a substantial increase in detail.


Next we'll hit a nice Globular Cluster NGC2419(mag10.4). Click on image to view its star chart This is globular has the distinction of being the most distant globular cluster known in the Milky Way Galaxy. At an estimated 250,000 light years distant, this cluster is actually located in intergalactic space. It is believed to have a highly eccentric orbit which brings it relatively close to us and then hurls it far off into space.

This cluster will appear as a star-like object at low powers in smaller telescopes. Look for it's two companion stars which seem to point to it. Higher magnification will clearly revel this object as a non-stellar object. However, it will remain a smudge of light in all but the largest telescopes. This is due to its great distance from us. Most of it's brightest stars are reported to be in the mag17 range... well beyond most amateur telescopes. The best most large telescopes can hope for is to detect a bit of mottling across the face of this object. 


Moving on we come to Spiral Galaxy NGC2782(mag11.5). Click on image to view its star chart This is a very interesting galaxy. You'll note a nebulous cloud to the left of the galaxy. This is one of the spiral arms of the galaxy. It was apparently torn away from the main body of the  galaxy during some long ago encounter with another passing galaxy.

Continuing, we come to another Spiral Galaxy, NGC2776(mag11.7).  TClick on image to view its star charthis is a classic spiral viewed almost perfectly face-on. These are, IMHO, some of the most beautiful of all deep sky objects. They have a delicate structure to them... almost like a work of art. They aren't always the easiest objects to observe, but... when you get a good look at one... you'll know what I mean!

Let's wrap things up with this weeks Utah Skies Challenge Object, Barred Spiral Galaxy IC2233(mag13). Click on image to view its star chart Unlike our previous galaxy, this galaxy is viewed almost perfectly edge-on. This is a tiny galaxy, spanning a mere 4.7' by 0.6'. Fortunately, it's small size gives it a reasonably high surface brightness. Unfortunately... it's pretty far from any bright stars. You'll have your work cut out for you with this one. But... if and when you find it, you're in for a treat. This beauty is located over 30 million light years away... meaning that you're looking way back in time. Also, edge-on galaxies have that sleek... sports car kind of look to them. These are always crowd pleasers.

Good Luck!

 

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.


Light Pollution Update

Summit County Development Plan

What follows are a few excepts from the draft of the Summit County Development Plan. As you'll see, considerable attention is being paid to dealing with this issue.

Establish lighting regulations for the amount, intensity, type, and location of all outdoor artificial illuminating devices to ensure that all such lighting is minimum, protective of the night sky, and in harmony with the resort and mountain values, while appropriately addressing safety concerns.

Architecture and other design elements shall:
Promote an aesthetic character that is fitting to the mountain environment by using a palette of building and landscape materials and forms, lighting,
signing, and other streetscape features that are generally compatible with the surrounding mountain environment.

Exterior lighting shall be minimal and must be directed down and shielded in accordance with County standards.

Because of the potential amount of commercial development in this area, the cumulative impact of lighting is a community concern. Development
shall use all reasonable measures to minimize lighting impacts, including full cut-off devices, timers, and other security devices that minimize the
need for exterior lighting. 

Exterior lighting shall be minimal on hillsides. 

These are all great. If we follow these simple guidelines, we'll make huge strides towards protecting the beautiful skies overhead.

Checkout the Light Pollution Section of the Utah Skies website at www.UtahSkies.org for more information on the harmful effects of improper lighting or for ideas on how to improve your lighting. Please contact us with any questions you may have or to Volunteer to help us in the fight to curb light pollution.

 

Next Weeks Report
Next week, we'll continue our journey through the cosmos and focus on the constellation Canis Minor.  

 
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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