On 4/5/22 2:57 PM, Richard D. Saam wrote:
> On 3/22/22 6:31 AM, Lou wrote:
>> On Monday, 14 March 2022 at 20:47:39 UTC, Richard D. Saam wrote:
>> I've read that although it's theoretically possible to place JWST into a
>> stable L2 orbit. It's like trying to balance a pin on a
>> table...practically, it's impossible. Not least because of perturbations
>> from moon, solar wind, effects from other planets, oblateness of planets
>> and sun etc. So if I remember correctly NASA does something like this:
>> They put it into a slightly incorrect but stable path pointing towards
>> the theoretical L2 orbit. And correct it when it starts to veer off,
>> with small bursts of its onboard thrusters. Which is why JWST has its
>> limited lifespan of only a few years. Which may be why NASA doesn't
>> supply any of the details you ask for. It doesn't have them.
>> I believe its thruster fuel runs out in about a decade.
> JWST sun and earth L2 positions (within 1 km)
> are presented at skylive.com
> The JWST, with its large thermal insulation surface area,
> should respond to the solar wind dynamic character.
> More accurate JWST positional data with time would
> be a data source for analyzing the solar wind dynamics.
> The Deep Space Network probably controls
> the significant digits(.1, .01 or maybe .001 km) here.
> I would like to have access to such.
> Richard D Saam