Where is New Horizons now |
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Where is New Horizons now |
 Jun 12 2010, 02:00 AM
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#121
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Junior Member  Group: Members Posts: 86 Joined: 12-October 05 From: Beijing Member No.: 526  |
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Jun 14 2010, 07:14 PM
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#122
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 Junior Member Group: Members Posts: 24 Joined: 29-May 08 From: Seattle, USA Member No.: 4162 |
Another halfway point today:
Halfway Heliocentric Distance Traveled from Earth at Launch to Pluto at Flyby June 14, 2010 16.946 AU (from Dr. Alan.) IMHO the "real" halfway point is the time one (days from launch to encounter) and that's in October. Tick, tick, tick.... |
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Jun 15 2010, 01:53 PM
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#123
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Member Group: Members Posts: 529 Joined: 19-February 05 Member No.: 173 |
....And half way from launch (19 Jan 2006) to Pluto encounter ops start (4 Jan 2015) comes next month, on July 13th. |
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Jul 2 2010, 04:44 PM
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#124
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Senior Member Group: Members Posts: 1018 Joined: 29-November 05 From: Seattle, WA, USA Member No.: 590 |
Spaceflight now reports a small course correction for NH.
http://www.spaceflightnow.com/news/n1007/02newhorizons/ If I recall correctly, NH has enjoyed a larger-than-planned surplus of fuel after launch. I'm wondering how well that's holding up, since obviously it increases the options for a KBO encounter after Pluto. --Greg |
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 Jul 3 2010, 01:24 PM
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#125
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Member Group: Members Posts: 529 Joined: 19-February 05 Member No.: 173 |
QUOTE (Greg Hullender @ Jul 2 2010, 05:44 PM)  Spaceflight now reports a small course correction for NH. http://www.spaceflightnow.com/news/n1007/02newhorizons/ If I recall correctly, NH has enjoyed a larger-than-planned surplus of fuel after launch. I'm wondering how well that's holding up, since obviously it increases the options for a KBO encounter after Pluto. --Greg Greg- It's holding up well. We expect to have about 160 m/s for KBO targeting. The preflight predict was about half that. -Alan |
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Jul 5 2010, 04:50 PM
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#126
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Newbie Group: Members Posts: 6 Joined: 1-August 08 Member No.: 4280 |
Twice more fuel means four times more reachable places - I wonder how it translates into hoped-for sizes of encountered objects.
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Jul 5 2010, 05:55 PM
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#127
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 Member Group: Members Posts: 903 Joined: 30-January 05 Member No.: 162 |
Excellent news regarding the fuel margin. I hope the luxury of being 'picky' about which follow on object(s) to explore occurs.
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 Jul 10 2010, 10:56 PM
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#128
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Member Group: Members Posts: 529 Joined: 19-February 05 Member No.: 173 |
QUOTE (tasp @ Jul 5 2010, 06:55 PM) Excellent news regarding the fuel margin. I hope the luxury of being 'picky' about which follow on object(s) to explore occurs. 5 years from Wednesday, we reach Pluto! 5 years from tomorrow, 3.2 days out, we get our best look at the "farside" hemispheres of Pluto and Charon. |
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Jul 10 2010, 11:07 PM
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#129
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 Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
My how time flies. I can remember when NH was on the drawing boards thinking it was so far in the future as to nullify any excitement I had over it. But wow, just five years. Marking it on my Outlook calendar now.
-------------------- If Occam had heard my theory, things would be very different now.
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Jul 10 2010, 11:11 PM
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#130
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 Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
5 years to go...wow. Seems like launch was literally yesterday; must be getting old!
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Jul 27 2010, 10:45 PM
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#131
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 Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
There is a new release on the New Horizons web site with distant images of Jupiter and Neptune
http://pluto.jhuapl.edu/news_center/news/20100727.php |
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Jul 28 2010, 05:50 AM
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#132
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 Senior Member Group: Members Posts: 2920 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
Whoua! I would have said a Venus like picture instead of a Moon like picture... and Nasa has invented a new mesurement unit: LORRI Pixels
-------------------- |
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Aug 10 2010, 09:40 PM
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#133
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Junior Member Group: Members Posts: 71 Joined: 19-January 10 From: Grimsby, N.E. Lincs, UK Member No.: 5179 |
I see New Horizons has just passed another milestone - she is now 2.5bn kms from Earth |
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Aug 11 2010, 10:32 AM
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#134
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Newbie Group: Members Posts: 16 Joined: 30-March 08 Member No.: 4078 |
QUOTE (Paolo @ Jul 28 2010, 10:45 AM) There is a new release on the New Horizons web site with distant images of Jupiter and Neptune. The images don't really look all that high quality -- did they not do proper bias/flat field calibration or is there something I'm missing? Certainly I would expect a fair bit of shot noise, but... |
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Aug 11 2010, 12:04 PM
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#135
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 Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Looking at the Jupiter image, my impression is that it was "brightened", as in reduced contrast (well, reduced compared to how it's normally reproduced) to show the Galilean satellites. This would also bring out low level noise, especially ratty noise like that given the really short exposure setting.
The detector and its gain isn't optimized for such short (9 ms) exposures, it was optimized for an order of magnitude longer exposures needed at Pluto. Even in the Jupiter flyby images it could be seen the images are distinctly noisier when exposure was kept shorter to avoid too much saturation. The shot noise in the background could also be due to scattered light from looking that close to the sun. In short, the conditions were far from optimal for LORRI. -------------------- |
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