What's up with Scheila (596)

URGENT UPDATE:2011/01/01 08:00 UT - Scheila dusts off tail after Christmas Show.
Scheila's tail appears to have disappeared! I have just emailed Ernesto to see if he is in a position to confirm. Joseph Brimacombe reported on the 30th that Scheila was sporting a nice tail but had to go to 5x1200 sec at f5, so clearly it has faded.



Travelling slighly faster and a little fainter that my last image on the 13th (OK I have been on holidays....slack I know) there is no evidence of a tail in todays image. This image is a stacked image of 6x300 Sec frame stacked for movement of the comet, even when I went to 10x300 sec, still no evidence of the tail.

Peter

UPDATE: 2010/12/23
UA Catalina Sky survey have formally released a statement on (596) Scheila after it's cometary outburst on the 11th (see history below). The statement covers a review of the circumstances of discovery, and for the first time some commentary on the spectra of follow-up observations. The statement suggests that the spectral analysis so far confirms that the outburst produced a dust tail indicating re-activation of a previously dead comet made up of largely carbonaceous material.

UPDATE: 2010/12/13 UT 23:40

As mentioned below here is the 8x300 binned 1x1.



UPDATE: 2010/12/13 UT 23:30
My latest image from 13/12/2010 shows Scheila in pretty much the same configuration as it has been for the past two days.



UPDATE: 2010/12/13 UT 13:30
Latest image on (596) Scheila is going out tonight as an exclusive for Doc Newstein at Ciel et Espace in France As soon as Frank posts it I'll post a link to it here. It is again a 5x300sec image binned 2x2 this time, I'll let you be the judge but I think the tail does look a little longer, but that could be a function of it being a little higher in the sky tonight. I have another 8 frames that I am yet to process binned 1x1 and I am going to put them into a little animation. Bonsoir amis astronomie en France!!!!

UPDATE: 2010/12/13 UT 04:30
Vishnu Reddy has been reviewing some of the historical spectral data for (596) Scheila and believes the spectrum is very similar to the Tagish Lake Meteorite, and consistent with a possible MBC (main belt comet).

UPDATE: 2010/12/13 UT 00:00
Wikipedia entry for Scheila (596) has just been updated with all the articles links prompting a massive traffic surge. I love Revolver Map!


UPDATE: 2010/12/12 UT 23:00
Mike Simonsen has done some research overnight on previous Catalina plates and identified that Scheila (596) started to get a little fuzzy around the 3rd of November. Mike also discusses previous examples of Main Belt Comets that behave as asteroids before springing into life. Mike is the Development Director at the AAVSO and runs Simostronomy Blog and writes for Universe Today.

UPDATE: 2010/12/12 UT 11:00 I have finished the color run....not much more to comment on, other than the subs were probably a little too short to get much more detail. Anyway we'll see what tomorrow brings in the way of commentary from the scientists.


UPDATE: 2010/12/12 UT 09:00 Ernesto is doing another run, and I have just started a 30min colour run now to see what color we can see. In the early preview image there doesn't seem to be much in the red spectrum, but as its only a 120 sec sub...there won't be alot there anyway. [Note: reversing the post order now for easy reading.]

UPDATE: 2010/12/12 UT 07:00
Here is my first image of Scheila (596), It is still very low to the horizion, I'll try for some color later in the evening. The image is quite noisy as it was only about 25 degrees above the horizion - a bit low for quality astrophotography.

It certainly has a good little tail going there.

UPDATE 2010/12/12 05:00 UT
Some good discussion now occuring on the MPML in Yahoo Groups. Some speculation on what may have caused the "tail" to develop. Marshall Eubanks has suggested it will take a little time to determine if it is a cometary outburst or dust raised by an asteroid collision. A "minor" collision should see the dust dissipate in a few weeks, if it is a cometary outburst it should last for a more prelonged period of time. Robert Matson had a quick look at known objects in the vacinity, the nearest object 2006 HV77, according to Robert is not close enough to be in consideration as a likely suspect. Dave Herald has suggested that the chances of two known objects colliding in the asteroid belt is about the same as two objects 100th the thickness of a human hair colliding on a footbal pitch.

But it does happen...... (although in fairness to Dave's math this was an Unknown VS Unknown collision).

Scheila should be visible from New Mexico in about an hour.

UPDATE 2010/12/12 03:00 UT
I should be ableto get some images myself myself once Scheila is above the horizion in New Mexico.

UPDATE 2010/12/12 02:00 UT
So it's official Steve Larson has observed a "spiral like" cometary outburst on Scheila (596) whilst reviewing Catalina Sky Survey photos overnight. This has just been announced in CBET 2583 on the IAU site.

Amateur astronomers are now pouncing on it for for quality images. Ernesto has posted an intial set of photos in his blog. They still seem fairly raw at this stage and I'm sure he will have a stunning processed version available shortly.


Scheila (596) is a main belt asteroid that was discovered in 1906. It is a bright slow moving main belter with a Perihelion of 2.4au (which means it comes nowhere near earth). Scheila is one of the most studied asteroids, regularly tracked for occulations with other stars, much is known about its rotational period and its lightcurve has been extensively studied.

So why is it listed on the Minor Planet's confirmation page with three comments in an hour?

Sailing along at Mag 13 most asteroids that bright get picked up by the surveys pretty quickly and are quickly eliminated as known objects by the hard-working staff and processes at the MPC. Something has prompted a number of quick follow-up observations.

Astronomers doing astrometery on asteroids report RA/DEC co-ordinates with a Universal time stamp from the registered observatory (which identifies LAT/LONG of Observer). The accuracy of the position measurements are called residuals which is an RMS differential to the predicted path. The Minor Planet Center would consider rms 0.2-0.6 arcsec quality data. I myself have had data rejected by MPC (rightly so) with residuals of 4 arcsecs - usually because I have done something stupid, such as reported the time incorrectly.

Asteroids studied since 1906 don't normally show up with dodgy arcsecs residuals, because the sum total of their "arc" in this this case a many opposition highly accurate orbit is well known. (One of the observer comments refered to residuals being a bit higher than expected).

So What's up? If it was "unknown newbie" reporting data perhaps we might dismiss it.

Turning to twitter...the constant source of live action - Ernesto Guido seems animated about something and he has done alot of quality work on asteroid and comet photography and according to his twitter feed he is about to post a most fascinating image. Ernesto does great work on photos of comets, and has photographed a number of outbursts recently.

Perhaps Scheila (596) has had a little global warming and popped an icy tail? Perhaps it has had a "fender bender" with another asteroid.

Hilarious Astronomy Gift Ideas...tis the season to be jolly!

Hi, some great and hilarious christmas Gift Ideas for the astronomers you love.

Why buy someone a gift card, or give them some cash to go buy what they want when you can show how much you love them by picking a unique, quirky, and funny astronomy related gift.

My personal favourite the Astronomer's beverage warmer! These are great!

Also there is a great range of "Pets are astronomers too". Featuring the very funny "Dogs were in space first" protest label. All dogs like to hunt, when they hunt they point, every astronomer dog needs to point very accurately....just like the master's telescope. SO on those cold nights out with the dog and the telescope imagine having your canine friend turned out in a coat with "pointing error of less than 1.2 Arcsecs", especially if you always wanted a dog called spot! ;-)



For something more serious, there's always the "my favourite glass" gift box to plonk your favourite plossal in. Also there are a great collection of astronomy journals with original artwork on the front (not shameless rip-offs of Hubble shots).


Finally there is as you would expect a full clothing range and the odd hilarious quirky item like the "Asteroid Hunter......not so keen on gathering" licence plates.

So merry christmas to all AARTScope visitors and friends, Grab a Hoodie, a beverage warmer, a coat for your dog and an observation log and have a great astronomy christmas.

M78 Nebula

M78 what a beauty!!! Well as you can see from my previous posts I am quite taken with M78. I think it would be fair to say its on of the “bluest” things in the night sky.

You can see from my previous post, the difference between a 1hr and a three hour exposure and the difference between a 44K JPG and a somewhat higher quality one (900K).

My image processing (and I consider that I have logged enough hours to be good, but still no where near Russell Croman or Tom Davis’ league)…..is as follows:

Calibrate all images with Darks and flats
Use Kernel filter to remove dark and hot pixels
Combine in color channels
Color combine
Export from Maxim DL as a TIFF
Use Levels and curves in Photoshop, according to the 4 Zone Method (Wodaski/Croman)
Remove any remainin hot pixels with healing brush
Reduce size of image and export to JPG

And the finished product I’m sure you would love to see…



My kids asked me what is it called? I said M78! "Yer dad, but doesn't it have a name like a barn owl nebula or something?" So I checked and no it doesn't have a common name. So lets take a closer look.



Anyway it does look nice......particularly in this wide angle shot that made APOD earlier in the year.

ESO all steamed up about GJ 1214b

ESO today announced a stunning breakthrough in Spectrophotometery with a world first - analysis of the composition of a "super-Earth" exo-planet's atmosphere,...... and its steamy or hazy.

GJ 1214b is the first "super-Earth" to have its atmosphere analysed by astronomers and possibly water, in the form of steam, is the most likely explanation for what was found in the atmosphere.

In 2007 on Astronomy Cast, Dr Pamela Gay, talking about exo-planet research predicted "we will soon find our own little waterworld just waiting for a b-grade movie to be filmed on it." Well, waterworld it maybe, but this one has alot more steam than an Alfred Hitchcock shower!!!

On the 19th of November 2010 astrophysicists passed a major milestone with the discovery of the 500th exo-planet. An exo-planet is an extrasolar planet that orbits a star outside our own solar system. What are these planets, how do we find them, what are they made up of and how do we understand them?

A super-Earth is a rocky planet of 5-10 earth masses. These are of particular interest to astronomers as their likely orbits can fall in the potentially habitable zone around its parent star, where water could exist as a liquid.

Scientists use three primary methods to find planets around other stars, a radial velocity method, watching for micro-lensing events, and observing transits where the planet interrupts the line of sight causing its host star to dim.

GJ 1214b was discovered in 2009 on the HARPS instrument on ESO's 3.6m telescope in Chile. Initial suspicitions that GJ 1214b's density was too low to be composed only of solid material, therefore being a good candidate for an atmosphere, have now been confirmed by an international team of astronomers using the FORS instrument on the ESO's VLT (very large telescope).
Researchers Jacob Bean (Harvard Smithsonian Center for astrophysics), Eliza Miller-Ricci Kempton (Georg-August-Universitat, Germany) and Derek Homeier (University of California) have co-authored a paper to be published in tomorrow's edition of Nature explaining their detailed research.

"This is the first super-Earth to have its atmosphere analysed. We've reached a real milestone on the road to characterizing these worlds," said Bean.

The team were looking for one of three possible scenarios:

• a small rocky planet shrouded in water/steam
• an atmosphere of hydrogen obscured by dense high clouds and haze
• a mini neptune like planet with a small rocky core and a rich hydrogen atmosphere

The observational method was highly complex and noted that there were no significant features in the specrum between 780 and 1000 nM ruling out the possibility of a rich hydrogen atmosphere.

Astronomer's use spectral analysis to determine the make up of an exo-planet's atmosphere. By monitoring the light of the parent star and looking for absorbtion lines at specific frequencies during the transit of an exo-planet, they compare the normal/reference light of the star for any differences and changes.

"Although we can't yet say exactly what that atmosphere is made of, its an exciting step forward to be able to narrow down the options for such a distant world to either steamy or hazy" said Jacob Bean. "Follow-up observations in longer wavelengths are required to determine which of these atmospheres exists on GJ 1214b".

Photo Credit ESO/L Carcada

AARTScope Blog make over

Hi all.

I hope you like the new make over featuring the hauntingly beautiful M78 which happens to be a perfect colour match to Planewave's deep blue livery.

So an update and refresh of the website was required.


The new 20inch Planewave CDK is performing magnificently by all reports and recently set a new record of 6 hours use in one night.

Anyway, just a short update.
Astroswanny

BV89381 asteroid = 2010 UJ7

I am experimenting with some new toys - Camtasia, it is a good tool for recording web sessions and I'm checking it out. (looks pretty good so far).

Here is a video of the session this afternoon doing follow up on a Provisional designation on the MPC's confirmation page. It was very low to the horizion and I was (a bit too) keen to grab it before the moon got up. Enjoy.

Asteroid BV89381

Unfortunately, when I was shooting it, it was still very low in the sky so I could only pick it up in 3x300 Sec which had the asteroid trailing and difficult to get accurate residuals. I ran some 30sec frames for a stack but could not pick it up due to the speed. I'll try tomorrow when its a little higher in the sky before the moon rises. Mind you that won't be easy either as it will be travelling twice as fast.

UPDATE
A couple of other folks jumped on it last night as well and got better data than mine. BV89381 now has a designation 2010 UJ7 at ~27 meter wide asteroid that will pass earth at 0.7 Lunar distances or 0.00085 AU on 2nd Nov.

Hohmann Transfer will be keeping a watchful eye on it along withthe folks at the MPC.

Faster meets further!

Technology is awesome. It constantly amazes us, the shiny, the newest, the sleekest, the most advanced, the greenest, all point to our fascination to push the boundaries.

Human ingenuity, vision, ideation, all drive each of us in different ways. Passion and emotion often over-ride commonsense and process. Fast cars, expensive toys, remote destinations, are also often the domain of James Bond films.

So trick question.......what do fast cars, great design, astronomy and James Bond films have in common........
P A R A N A L !!!!!


The European Southern Observatory (ESO) tapped into all of these emotions with a unique blend of the fastest and the furtherest, an electric super car and the world's most productive optical telescope - both impressive structures that evoke our emotion and passions.

So some history here for the movie buffs may assist set the scene.

Who could forget the Aricabo Radio Telescope arising out of the "CGI lake" in the James Bond movie Goldfinger, water draining away every where, only to contact a satellite to laser a few cities before being blown to bits by the hero and his beautiful assistant.

Then more recently in Quantum of Solace with Daniel Craig in the lead role - Superspy meets beautiful woman, and on their first date find, yet again, another evil villain holed up in a Telescope control room that must be instantly dispatched with lots of special effects. Is it any wonder that astrophysicists are developing a complex and have to watch "Big Bang Theory" for therapy. Quantum of Solace (a very "sciencey" name) was filmed at ESO's Paranal site.



Daniel Craig described Paranal as "a very special place" and that goes some way to highlighting why you might find a group of telescopes there. The structures of Telescopes are imposing, impressive and unique and provide the essential backdrop for the action scenes in action movies.

Now when we talk about renewable technology, we are not talking about billion dollar telescope sites be blown up on James Bond film sets and then being open for the pressing business of Astrophysics the next day......but Mr Bond does likes his fast cars - now he can have an electric one.

The supercar, has also often drawn the same emotions out of the alpha-male, though this time its not the "racing green color" but racing green endurance. This week the ESO brought them both together for a unique opportunity.

Speed versus distance.

There they were - two pieces of highly advanced technology side by side in all their glory. The worlds fastest ELECTRIC supercar and the most productive ground based observatory. The "renewable" film set and the renewable energy super car. Enough of the parallels and metaphors.....it was just plain gorgeous!!


The ESO team described their exciting day as follows: "The SRZero electric supercar arrived at Paranal on October 27 after touring the Pan-American Highway from Alaska's Prudhoe Bay and on their way to Ushuaia. The Racing Green Endurance (RGE) adventure could not have been complete without a stop at Paranal, where the RGE team had the opportunity to observe the fascinating southern skies under the best conditions and test the supercar’s limits by performing at an altitude of 2600 metres above sea level."

So what's the science angle here. The ESO also today shared some of their finest work "on wheels" with some of the deepest ever images of spiral galaxies taken with the HAWK-I camera on the VLT (very large telescope). These infra-red shots of these very distant spiral galaxies weren't just released to seed inspirational new designs for mag wheels for super cars, they also show the various types and stages of galaxy development. HAWK-I stands for High-Acuity Wide-field K-band Imager and is highly sensitive in the infra-red range.



So this week we saw the best set of wheels on earth and in the heavens. Thanks to the folks at the ESO and their imaginative marketing, drawing our attention to the best of breed technologies, and tapping into our passion for the shiniest, boldest, and contrasting it with the grandest and most majestic.

Photo Credits: ESO/ H.H. Heyer
ESO/ Glenn Arcos & www.racinggreenendurance.com
Source ESO Used with permission.