As JWST approached the L2 position its time(sec) and position(within .1
km) relative to the sun and earth were presented on the NASA website:
https://jwst.nasa.gov/content/webbLaunch/whereIsWebb.html
The JWST time and position are not presented on this website since its arrival at L2.
Understanding that JWST is in a quasi orbit around L2, does anyone know
if NASA (or anyone else) presents the JWST time and distance from sun
and earth as it meanders in L2?
Richard D Saam
On Monday, 14 March 2022 at 20:47:39 UTC, Richard D. Saam wrote:
As JWST approached the L2 position its time(sec) and position(within .1
km) relative to the sun and earth were presented on the NASA website:
https://jwst.nasa.gov/content/webbLaunch/whereIsWebb.html
The JWST time and position are not presented on this website since its
arrival at L2.
Understanding that JWST is in a quasi orbit around L2, does anyone know
if NASA (or anyone else) presents the JWST time and distance from sun
and earth as it meanders in L2?
Richard D Saam
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.
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.
On Monday, 14 March 2022 at 20:47:39 UTC, Richard D. Saam wrote:
As JWST approached the L2 position its time(sec) and position(within .1
km) relative to the sun and earth were presented on the NASA website:
https://jwst.nasa.gov/content/webbLaunch/whereIsWebb.html
The JWST time and position are not presented on this website since its
arrival at L2.
Understanding that JWST is in a quasi orbit around L2, does anyone know
if NASA (or anyone else) presents the JWST time and distance from sun
and earth as it meanders in L2?
Richard D Saam
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.
On 3/22/22 6:31 AM, Lou wrote:
On Monday, 14 March 2022 at 20:47:39 UTC, Richard D. Saam wrote:JWST sun and earth L2 positions (within 1 km)
As JWST approached the L2 position its time(sec) and position(within .1
km) relative to the sun and earth were presented on the NASA website:
https://jwst.nasa.gov/content/webbLaunch/whereIsWebb.html
The JWST time and position are not presented on this website since its
arrival at L2.
Understanding that JWST is in a quasi orbit around L2, does anyone know
if NASA (or anyone else) presents the JWST time and distance from sun
and earth as it meanders in L2?
Richard D Saam
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.
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
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