James Webb Space Telescope, information, updates and discussion |
James Webb Space Telescope, information, updates and discussion |
Aug 23 2005, 02:01 PM
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#201
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Member Group: Members Posts: 134 Joined: 13-March 05 Member No.: 191 |
The manufacture of the JWST mirror blanks has now been completed.
Despite this milestone, the fate of JWST is still somewhat precarious, because although the scientific bang from the telescope is expected to be huge, the bucks required have increased to a staggering $4.5 billion. A Space.com article on the squeeze in NASA's space-based astronomy plans gives some background. The JWST home page can be found here. The Space Telescope Science Institute, which runs Hubble, also has a site here. As does ESA. |
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Jul 12 2022, 05:22 PM
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#202
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Senior Member Group: Members Posts: 1444 Joined: 26-July 08 Member No.: 4270 |
Jupiter! (from here which also has other goodies including a transit of the ~1.4 R_earth planet transiting GJ 4332).
-------------------- -- Hungry4info (Sirius_Alpha)
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Jul 12 2022, 07:56 PM
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#203
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Senior Member Group: Members Posts: 2091 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Jupiter! (from here which also has other goodies including a transit of the ~1.4 R_earth planet transiting GJ 4332). Wow! For some reason I read somewhere that Jupiter is actually too bright for JWST to observe (glad to be wrong!) |
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Jul 13 2022, 03:28 AM
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#204
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Member Group: Members Posts: 234 Joined: 14-January 22 Member No.: 9140 |
Even Mars (which has a higher surface brightness than Jupiter) isn't too bright for JWST to observe, and will be observed by it. Mercury and Venus are off limits, of course.
Despite the extensive exploration that Mars, Jupiter, and Saturn have already received, JWST still has spectroscopic capabilities that none of the spacecraft that have visited those places could match. |
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Jul 13 2022, 07:27 AM
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#205
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Member Group: Members Posts: 234 Joined: 14-January 22 Member No.: 9140 |
For those curious about the jewel of exoplanet targets, TRAPPIST-1 has already been observed by JWST, will be observed again in the next day or so, and yet again within a week. Based on at least two approved programs, it will be targeted a minimum of 17 times during the first year (Cycle 1), timed to match predicted transits of all seven of its known planets. So, in a nutshell, this much anticipated work is underway, and it's anyone's guess when the first results will be announced, but it seems like a good bet that preliminary results will be released by early 2023 if not sooner, but, as the signals accumulate over many repeated observations, it won't be anytime soon that JWST is done with this amazing system of multiple high-interest targets.
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Jul 13 2022, 06:18 PM
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#206
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Member Group: Members Posts: 723 Joined: 13-June 04 Member No.: 82 |
For those curious about the jewel of exoplanet targets, TRAPPIST-1 has already been observed by JWST, will be observed again in the next day or so, and yet again within a week. Based on at least two approved programs, it will be targeted a minimum of 17 times during the first year (Cycle 1), timed to match predicted transits of all seven of its known planets. So, in a nutshell, this much anticipated work is underway, and it's anyone's guess when the first results will be announced, but it seems like a good bet that preliminary results will be released by early 2023 if not sooner, but, as the signals accumulate over many repeated observations, it won't be anytime soon that JWST is done with this amazing system of multiple high-interest targets. From THIS THREAD: Combined transit list for the TRAPPIST-1 system: TRAPPIST-1b: 5 transits, MIRI/F1500W (GTO 1177) 5 transits, MIRI/F1280W (GTO 1279) 2 transits, NIRISS/SOSS (CO 2589) TRAPPIST-1c: 4 transits, NIRSpec/S1600A1 (CO 2420) 2 transits, NIRISS/SOSS (CO 2589) TRAPPIST-1d: 5 transits, NIRISS/SOSS (GTO 1201) TRAPPIST-1e: 4 transits, NIRSpec/BOTS (GTO 1331) 2 transits, MIRI/F1500W (CO 2304) TRAPPIST-1f: 2 transits, NIRSpec/BOTS (GTO 1201) TRAPPIST-1g: 2 transits, NIRSpec/BOTS (CO 2589) TRAPPIST-1h: 3 transits, NIRSpec/PRISM (CO 1981) 2 transits, NIRSpec/BOTS (CO 2589) NOTE -- CO 2590 changed to CO 2589 as per StargazeInWonder |
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Jul 13 2022, 09:14 PM
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#207
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Member Group: Members Posts: 234 Joined: 14-January 22 Member No.: 9140 |
Thanks for the update, Mongo – double what I had found, and then some.
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Jul 14 2022, 04:01 AM
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#208
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Member Group: Members Posts: 234 Joined: 14-January 22 Member No.: 9140 |
Mongo, I did a search for each program and didn't find the 2590 that you mention, but 2589 seems to match the description; perhaps an ID number was changed or mistyped?
Many of those programs now have planned observations more than a year from now, which may be why I had missed them. The first two listed also have some observations with status "Not ready for long range planning." Here are the months in which observations are to be made (or have been made!) for each program. Because of the obstacle that the Sun provides, TRAPPIST-1 is only observable in June, July, October, November, and December. Essentially, some observations will be made in each possible month from now through December 2023, and there's no doubt that this will continue for much if not all of the time that JWST is operational. The first of these to conclude will be GO 2589, which in fact concludes eight days from now! This program has no proprietary period, so data will apparently be made public very soon. To temper the hype, this program will not observe planets d, e, or f, which are the ones expected to have the most earthlike temperatures. GTO 1177 Not ready for long range planning GTO 1201 Jul 2022, Oct 2022, Nov 2022, Dec 2022, Jun 2023, Nov 2023, Dec 2023, +? GTO 1279 Nov 2022, Oct 2023 GTO 1331 Jun 2023, Oct 2023 CO 1981 Jul 2023, Nov 2023, Dec 2023 CO 2304 Nov 2022 CO 2420 Jul 2022, Oct 2023, Nov 2023 GO 2589 Jul 2022 CO 2590 ? |
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