Art, the Pacman Nebula (ionized by O type stars), isn't yellow!!!
Nuh-uh!!!
But Jaime Fernandez sure got his colors beautifully right... like this color for CometHartley2!
Ann
Re: Comet Hartley 2
Posted: Sun Oct 03, 2010 5:24 pm
by neufer
Ann wrote:
Art, the Pacman Nebula (ionized by O type stars), isn't yellow!!! Nuh-uh!!!
I hardly agree.
Ann wrote:
But Jaime Fernandez sure got his colors beautifully right... like this color for CometHartley2!
I heartily agree.
Re: Comet Hartley 2
Posted: Sun Oct 03, 2010 7:11 pm
by Beyond
I used to play pac-man on an Arcade machine when it first came out. It was FUN!, but TANK was loads of fun because you got to fire little dots at the other guy's tank.
But I'm wondering what Owlice's Moving Through Space post is showing. MY updated IE8 won't show me unless i start clicking on a lot of things. It seems to have set somthing off. I get a 'blocker' notice even opening up a posting window in this forum.
And how come I'm seeing red squares in the left hand corner of the last 3 or 4 posts to a thread all of a sudden? And then they may disappear the next time i look.
Re: Comet Hartley 2
Posted: Sun Oct 03, 2010 11:01 pm
by owlice
beyond, the Moving Through Space post has a couple of images of the comet, one of which is a movie which shows the comet in motion (so is way cool!). Try Firefox rather than IE 8, perhaps?
Re: Comet Hartley 2
Posted: Sun Oct 03, 2010 11:07 pm
by owlice
Comet Hartley 2 and NGC 281
Copyright: Mike Holloway, Holloway Comet Observatory [attachment=0]103p-20101002-rgb-ha-mfh_filtered1copy.jpg[/attachment][/i]
Re: Comet Hartley 2
Posted: Mon Oct 04, 2010 3:39 am
by bystander
beyond wrote:And how come I'm seeing red squares in the left hand corner of the last 3 or 4 posts to a thread all of a sudden? And then they may disappear the next time i look.
The red squares mean you haven't read that post, and of course the next time they won't be there.
Comet 103P/Hartley on oct 1st
Posted: Mon Oct 04, 2010 9:09 am
by etiqi
Hi!
Here is my first picture of this comet, from Can Duran Observatory, in Palamos, Catalonia (Spain). I could only take 50 minutes, clouds didn't forgive!
I finally got to see owlice's comet movie. It turns out that i had to go get 'Quick Time' from Apple to see it. Wheeeeee! i got to see it move a whole inch!!
And i don't get the pop-up restricter warnings any more. YEA!
C/103P/Hartley on Oct 1st/2nd, 2010. Exposure - 7.17 hrs.
Technical data:
Telescope: Televue TV-85 at F/5.6 (0.8x FR/FF)
Camera: Hutech modified Canon XS
Filter: IDAS-LPS
Exposure: 44x60 sec, 34x120 sec and 106x180 sec all at ISO 1600.
Processing: IRIS for stacking, stretching and initial color balance, Photoshop w/Noel Carboni's Astronomy Tools and Neat Image for the final image.
Re: Comet Hartley 2
Posted: Tue Oct 05, 2010 1:49 pm
by mamill
I took this on Sunday morning 10/3. It is a composite of 10x5mins. It gives a sense on how quickly it moves in a 50 minute time frame.
Copyright: Mike Millan
mamill wrote:I took this on Sunday morning 10/3. It is a composite of 10x5mins.
It gives a sense on how quickly it moves in a 50 minute time frame.
Copyright: Mike Millan
What size is the field of view?
Re: Comet Hartley 2
Posted: Tue Oct 05, 2010 5:33 pm
by mamill
bystander wrote:What size is the field of view?
According to CCDCalculator the FOV is 45x67.7 arc minutes. It was taken with an AT8RC and Orion Starshoot Pro DSCI.
Re: Comet Hartley 2
Posted: Tue Oct 05, 2010 7:13 pm
by Beyond
Owlice, are you going to be able to give us more comet movies later? I want to see if it hits or misses the bigger brighter object that it looks like it's heading for.
This visitor from deep space, seen here by NASA's Wide-field Infrared Survey Explorer, or WISE, is comet Hartley 2 -- the destination for NASA's EPOXI mission.
The comet, known officially as 103P/Hartley was discovered fairly recently, in 1986, by Malcolm Hartley in Siding Spring, Australia. It probably originated from an icy orbit close to that of Jupiter's, before something knocked it on a path toward the sun. The comet circles the sun every 6.46 years -- its upcoming closest approach to the sun, called perihelion, will take place on Oct. 28, 2011. EPOXI, which utilizes the already "in flight" Deep Impact flyby spacecraft, will reach the comet on Nov. 4.
...
The fuzzy background in this picture is noise, primarily from dust in our own solar system. Stars cannot be seen because they are subtracted out during the process of averaging multiple WISE pictures together into this one view.
Infrared light of 4.6, 12 and 22 microns is colored blue, green and red, respectively.
Hubble Space Telescope observations of comet 103P/Hartley 2, taken on September 25, are helping in the planning for a November 4 flyby of the comet by the Deep Impact eXtended Investigation (DIXI) on NASA's EPOXI spacecraft.
Analysis of the new Hubble data shows that the nucleus has a diameter of approximately 0.93 miles (1.5 kilometers), which is consistent with previous estimates.
The comet is in a highly active state as it approaches the Sun. The Hubble data show that the coma is remarkably uniform, with no evidence for the types of outgassing jets seen from most "Jupiter Family" comets, of which Hartley 2 is a member.
At the time of the Hubble observation, the comet was 1.153 astronomical units (172 million km or 107 million miles) from the Sun. The comet was 0.218 astronomical units (32.6 million km or 20.2 million miles) from Earth.
Re: Comet Hartley 2
Posted: Wed Oct 06, 2010 9:30 pm
by mexhunter
Are only 5 frames of 3 minutes from sunday evening and can be seen clearly accelerated motion in our solar system.
No big deal, I made it with a telescope SC8 "and a Canon 5D, very improvised.
Click to play embedded YouTube video.
And a picture with a processor, which give priority to the stars, then make another one where I will give priority to the comet:
This visitor from deep space, seen here by NASA's Wide-field Infrared Survey Explorer, or WISE, is comet Hartley 2 -- the destination for NASA's EPOXI mission.
The comet, known officially as 103P/Hartley was discovered fairly recently, in 1986, by Malcolm Hartley in Siding Spring, Australia. It probably originated from an icy orbit close to that of Jupiter's, before something knocked it on a path toward the sun. The comet circles the sun every 6.46 years -- its upcoming closest approach to the sun, called perihelion, will take place on Oct. 28, 2011. EPOXI, which utilizes the already "in flight" Deep Impact flyby spacecraft, will reach the comet on Nov. 4.
EPOXI stuck to Earth's orbit like epoxy between the two gravity assists
Re: Comet Hartley 2
Posted: Thu Oct 07, 2010 9:04 am
by pinkcoca
Thats awesome.....very nice capture.
mamill wrote:I took this on Sunday morning 10/3. It is a composite of 10x5mins. It gives a sense on how quickly it moves in a 50 minute time frame.
Copyright: Mike Millan
103P and the Double Cluster.
Credit and copyright: Mike Holloway, Holloway Comet Observatory [attachment=0]103p-ngc884-20101007-3xmosaic-mfh.jpg[/attachment][/i]
