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Lucas
Posted on: Feb 25 2021, 04:31 AM


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QUOTE (Explorer1 @ Feb 24 2021, 03:55 PM) *
Fantastic image of Venus released from this flyby, seeing through to the surface.
https://www.nasa.gov/feature/goddard/2021/p...g-view-of-venus


With guest appearance by Orion on the bottom right smile.gif
  Forum: Sun · Post Preview: #250262 · Replies: 149 · Views: 508857

Lucas
Posted on: Jul 29 2020, 01:19 PM


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Neat! Hopefully that’s the Moon or else we’re in a lot of trouble! laugh.gif

QUOTE (Phil Stooke @ Jul 28 2020, 09:28 AM) *
http://9ifly.spacety.com/thread-93048-85-1.html

Picture of Earth and Mars taken by TW1 from 1.2 million km.

[attachment=46057:earth_mo...july2020.jpg]
Credit: CNSA

Phil

  Forum: Tianwen 1- 2020 Orbiter/Lander · Post Preview: #247744 · Replies: 70 · Views: 181199

Lucas
Posted on: Apr 11 2020, 06:45 PM


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Here is a video from the Kryoneri Observatory in Greece, showing BepiColombo during the flyby. Wow!

You don’t need a Facebook account to see it: https://www.facebook.com/athensobservatory/...56196052386495/
  Forum: BepiColombo · Post Preview: #247090 · Replies: 89 · Views: 421395

Lucas
Posted on: Oct 29 2019, 02:22 AM


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QUOTE (Julius @ Oct 28 2019, 07:57 PM) *
Can somebody post the bigger picture to show exact location of Curiosity within Gale Crater?


https://mars.nasa.gov/msl/mission/where-is-the-rover/
  Forum: MSL · Post Preview: #245951 · Replies: 2243 · Views: 2182913

Lucas
Posted on: May 28 2019, 12:24 PM


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It appears that they are using luminosity distances (see http://www.astro.ucla.edu/~wright/cosmo_02.htm#DL for definition) based on https://lscsoft.docs.ligo.org/ligo.skymap/l...p/bayestar.html (look at min_distance parameter) and https://emfollow.docs.ligo.org/userguide/glossary.html (look at “burst range”). In these units the CMB is at ~15000 Gpc.
  Forum: Telescopic Observations · Post Preview: #244840 · Replies: 33 · Views: 74901

Lucas
Posted on: Dec 29 2018, 10:29 PM


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Interesting tweet from Alan... perhaps they have resolved Ultima Thule?

https://twitter.com/alanstern/status/1079111629604831233
  Forum: New Horizons · Post Preview: #242808 · Replies: 294 · Views: 564414

Lucas
Posted on: Sep 30 2016, 01:53 AM


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Rosetta is now on a collision course with 67P C-G... impact expected tomorrow (30 September) at 11:20 UT (+-20 min)

http://blogs.esa.int/rosetta/2016/09/29/co...euvre-complete/

Before the burn started, it obtained this wide-angle picture of the comet: http://www.esa.int/spaceinimages/Images/20...de-angle_camera
  Forum: Rosetta · Post Preview: #232813 · Replies: 390 · Views: 451387

Lucas
Posted on: Jul 14 2016, 11:28 AM


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There's an article about this in today's New York Times with some interesting additional information from Drs. Bannister & Brown: http://www.nytimes.com/2016/07/14/science/...arf-planet.html

QUOTE
Dr. Bannister’s dwarf planet is not distant enough to be affected by Planet Nine, but at least one of the 600 objects tracked by the survey is. She declined to give details, but has described it in talks, including one attended by Dr. Brown.

“I know that it’s going to fit in at least with most of the story,” Dr. Brown said. “It’s exactly in the direction it should be for Planet Nine.”
  Forum: Telescopic Observations · Post Preview: #231636 · Replies: 105 · Views: 4274153

Lucas
Posted on: Jul 12 2016, 02:48 AM


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Press release from the Canada-France-Hawaii Telescope, http://www.cfht.hawaii.edu/en/news/NewDwarfPlanet/

QUOTE
An international team of astronomers have discovered a new dwarf planet orbiting in the disk of small icy worlds beyond Neptune. The new object is roughly 700 kilometers in size and has one of the largest orbits for a dwarf planet. Designated 2015 RR245 by the International Astronomical Union's Minor Planet Center, it was found using the Canada-France-Hawaii Telescope on Maunakea, Hawaii, as part of the ongoing Outer Solar System Origins Survey (OSSOS)."


Orbital elements from IAU MPC: http://www.minorplanetcenter.net/mpec/K16/K16N67.html
  Forum: Telescopic Observations · Post Preview: #231601 · Replies: 4 · Views: 7962

Lucas
Posted on: Aug 6 2014, 11:29 AM


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Here is a press release about the radio telescope observations of Pluto & Charon using ALMA:

http://public.nrao.edu/news/pressreleases/alma-pluto

Neat two-frame animation of the orbital motion smile.gif
  Forum: New Horizons · Post Preview: #211742 · Replies: 116 · Views: 177027

Lucas
Posted on: Jul 23 2014, 07:09 PM


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There is a new geologic map of Mars that was recently released by the USGS -- check it out!

http://pubs.usgs.gov/sim/3292/
  Forum: Mars · Post Preview: #211284 · Replies: 124 · Views: 345256

Lucas
Posted on: Mar 26 2014, 06:19 PM


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I entered the orbital elements into Celestia and rendered the orbits of Eris, Sedna & 2012 VP113. It's hard to display all of them simultaneously because of the different inclinations, but I think this gives a good perspective.

Edit: I added another view with a different orientation (far above the ecliptic plane). In the first one it seems like 2012 VP113 has a larger semimajor axis than Sedna, but that was just due to the perspective.
  Forum: Telescopic Observations · Post Preview: #208493 · Replies: 72 · Views: 87955

Lucas
Posted on: Mar 26 2014, 04:57 PM


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Emily,

Have you tried the JPL small-body database browser?

http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2012...log=0;cad=0#orb

It's a little hard to zoom out properly, but if you're happy with showing most of the orbit, this could be good enough for now... wink.gif I've attached a screenshot.



  Forum: Telescopic Observations · Post Preview: #208485 · Replies: 72 · Views: 87955

Lucas
Posted on: Nov 28 2012, 04:57 PM


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Well, this is interesting... apparently all the hype was simply due to a misunderstanding by the NPR reporter who was interviewing Dr. Grotzinger!

http://www.slate.com/blogs/the_slatest/201...out_entire.html

A tweet by Curiosity (screenshot attached) was meant to reduce the expectations and clarify Dr. Grotzinger's remarks, but apparently it wasn't noticed and the story went viral.

Sigh...

--Lucas
  Forum: MSL · Post Preview: #194922 · Replies: 245 · Views: 432452

Lucas
Posted on: Jul 14 2012, 12:08 AM


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QUOTE (RoverDriver @ Jul 11 2012, 05:12 PM) *
Just got word ODY is in safe mode again. They do not know what is the cause of the safe mode yet.

Paolo


Looks like ODY is back in business! smile.gif

http://www.nasa.gov/mission_pages/odyssey/...ey20120713.html

--Lucas
  Forum: Opportunity · Post Preview: #185696 · Replies: 522 · Views: 395210

Lucas
Posted on: Dec 7 2011, 02:56 PM


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For the impatient among us... wink.gif

http://space.jpl.nasa.gov/cgi-bin/wspace?t...=1&showac=1

in very good agreement with the "countdown" clock at the MSL site (obviously!)
  Forum: MSL · Post Preview: #181252 · Replies: 186 · Views: 168947

Lucas
Posted on: Aug 27 2011, 05:13 PM


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Wow! That is truly awesome and inspiring!

I don't know if you're taking requests, but it would be really neat to see a model of Opportunity at some spot in her trek and do a "fly over".


  Forum: Opportunity · Post Preview: #178011 · Replies: 37 · Views: 42746

Lucas
Posted on: Mar 6 2010, 02:28 PM


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Lots of Pancam pictures returned on March 3rd, including some of Stu's "lucky horseshoe" crumbling apart as Spirit moved those 39 cm! I'm sure he doesn't mind one bit wink.gif

Looking forward to some color mosaics by the experts!

Attached Image


http://qt.exploratorium.edu/mars/spirit/pa...7MP2400L5M1.JPG
  Forum: Spirit · Post Preview: #156563 · Replies: 311 · Views: 374630

Lucas
Posted on: Jan 25 2008, 06:36 PM


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Well, I'd argue against the use of the term "high definition" in this context, with Pluto being 1 pixel across!

Still, nice to see new images from NH!

Does anyone here have a plot of the brightness variations of Pluto as seen by NH? Are we talking about changes of a few percent, or are they larger?
  Forum: New Horizons · Post Preview: #108415 · Replies: 1628 · Views: 1114094

Lucas
Posted on: Jan 5 2008, 01:52 AM


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PANSTARRS-1 is in operation now in Haleakala. But the full-operation PANSTARRS (also refered to as PS-4) is facing an uncertain future. It should be located in Mauna Kea, but there's fierce opposition to the construction of any new telescopes in the Hawaiian islands by certain groups of natives.

In related news, LSST (an 8-m telescope designed to look for killer asteroids among other topics) is proceeding in its design and construction (it will be located in northern Chile) and just received a 30-million gift from Bill Gates and Charles Simonyi.
  Forum: Mars · Post Preview: #106828 · Replies: 186 · Views: 141718

Lucas
Posted on: Dec 6 2007, 09:44 PM


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Thanks guys, I've started the download and I'm drooling all over the keyboard. So many memories from past sols!
  Forum: Tech, General and Imagery · Post Preview: #105207 · Replies: 945 · Views: 730015

Lucas
Posted on: Dec 6 2007, 08:46 PM


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I just downloaded MMB and it looks great! Quick question (couldn't find the answer in the MMB help) -- is there a way to use MMB to download data from, say, the last 100 sols? Assuming disk space and bandwidth are not a problem... smile.gif
  Forum: Tech, General and Imagery · Post Preview: #105200 · Replies: 945 · Views: 730015

Lucas
Posted on: Jun 6 2007, 04:23 PM


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QUOTE (centsworth_II @ Jun 6 2007, 07:45 AM) *
It's below the bottom right corner on the image you link.
You have to click on "browse version" on the right side of the
page to get the whole image. Spirit is at the tip of the arrow
on the right side of Home Plate, which is very small in the image.
The horizontal line shows where the image is cut off on the
page you linked.


Thanks centsworth_II! With the arrow that you included, "Home Plate" becomes very obvious! smile.gif

Based on Tesheiner's map for Spirit's ground track, I figured that the rover is at position x=20065, y=26773 in that image. Is that about right?

--Lucas
  Forum: MRO 2005 · Post Preview: #91705 · Replies: 58 · Views: 51981

Lucas
Posted on: Jun 6 2007, 02:23 PM


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Hi all,

Long time reader, first time poster... Thanks to all the UMSF members for sharing such an amazing array of knowledge with the rest of us!

The IAS viewer is truly awesome! Regarding this image:

http://hirise.lpl.arizona.edu/PSP_001777_1650

Can anyone pinpoint Spirit's location? Tesheiner maybe? smile.gif

Thanks!

--Lucas
  Forum: MRO 2005 · Post Preview: #91692 · Replies: 58 · Views: 51981


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