Use the NASA/JPL Horizons system to track JWST and other objects that are not in a "normal" earth orbit. JWST is essentially in solar orbit, perturbed by the Earth. TLE and the underlying "simplified perturbations models" that are used by GPredict and the like don't work for solar orbits.
https://ssd.jpl.nasa.gov/horizons/app.html
de KM1P Joe
This is the current from Space-Track.org 0 JWST 1 50463U 21130A 21362.00000000 .00000000 00000-0 00000-0 0 9999 2 50463 4.6198 89.0659 9884983 192.3200 17.4027 0.01958082 27
On 06/01/2022 17:24 Joseph B. Fitzgerald [email protected] wrote:
Use the NASA/JPL Horizons system to track JWST and other objects that are not in a "normal" earth orbit. JWST is essentially in solar orbit, perturbed by the Earth. TLE and the underlying "simplified perturbations models" that are used by GPredict and the like don't work for solar orbits.
https://ssd.jpl.nasa.gov/horizons/app.html
de KM1P Joe
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Nigel A. Gunn, ///shoulders.outwards.resolutions tel +1-937-971-0366 Amateur Radio G8IFF W8IFF and GMRS WRBV701, e-mail [email protected] www http://www.ngunn.net
This "current" TLE set is actually the last TLE set for JWST that was published on December 28, 2021. It can only be used for tracking JWST when it was less than about 50000 km from Earth. TLEs and tracking programs that use the SGP4/SDP4 model are useless for tracking deep space spacecraft that are more than about 50000 km from our planet. For deep space you need other types of parameters, like state vectors, and other programs, like GMAT.
But, as Joe indicated, several deep space spacecraft, such as JWST, can be tracked online using JPL's Horizons.
73, Nico PA0DLO
On 07-01-2022 00:03, Nigel A. Gunn G8IFF/W8IFF wrote:
This is the current from Space-Track.org 0 JWST 1 50463U 21130A 21362.00000000 .00000000 00000-0 00000-0 0 9999 2 50463 4.6198 89.0659 9884983 192.3200 17.4027 0.01958082 27
On 06/01/2022 17:24 Joseph B. Fitzgerald [email protected] wrote:
Use the NASA/JPL Horizons system to track JWST and other objects that are not in a "normal" earth orbit. JWST is essentially in solar orbit, perturbed by the Earth. TLE and the underlying "simplified perturbations models" that are used by GPredict and the like don't work for solar orbits.
https://ssd.jpl.nasa.gov/horizons/app.html
de KM1P Joe
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Nigel A. Gunn, ///shoulders.outwards.resolutions tel +1-937-971-0366 Amateur Radio G8IFF W8IFF and GMRS WRBV701, e-mail [email protected] www http://www.ngunn.net
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There are somewhere good tracking programs or something, I mean GREAT! Like a tenth of a degree accuracy GREAT!
Because a cousin of mine, made a movie of the scope moving along the background stars. The total field of view of his telescope was only 1/4 a degree, and the Space scope was passing along right down the center of the field of view. Way cool.
Joe WB9SBD
On 1/7/2022 6:08 AM, Nico Janssen wrote:
This "current" TLE set is actually the last TLE set for JWST that was published on December 28, 2021. It can only be used for tracking JWST when it was less than about 50000 km from Earth. TLEs and tracking programs that use the SGP4/SDP4 model are useless for tracking deep space spacecraft that are more than about 50000 km from our planet. For deep space you need other types of parameters, like state vectors, and other programs, like GMAT.
But, as Joe indicated, several deep space spacecraft, such as JWST, can be tracked online using JPL's Horizons.
73, Nico PA0DLO
On 07-01-2022 00:03, Nigel A. Gunn G8IFF/W8IFF wrote:
This is the current from Space-Track.org 0 JWST 1 50463U 21130A 21362.00000000 .00000000 00000-0 00000-0 0 9999 2 50463 4.6198 89.0659 9884983 192.3200 17.4027 0.01958082 27
On 06/01/2022 17:24 Joseph B. Fitzgerald [email protected] wrote:
Use the NASA/JPL Horizons system to track JWST and other objects that are not in a "normal" earth orbit. JWST is essentially in solar orbit, perturbed by the Earth. TLE and the underlying "simplified perturbations models" that are used by GPredict and the like don't work for solar orbits.
https://ssd.jpl.nasa.gov/horizons/app.html
de KM1P Joe
Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/
View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
Nigel A. Gunn, ///shoulders.outwards.resolutions tel +1-937-971-0366 Amateur Radio G8IFF W8IFF and GMRS WRBV701, e-mail [email protected] www http://www.ngunn.net
Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/
View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/
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participants (4)
-
Joe -
Joseph B. Fitzgerald -
Nico Janssen -
Nigel A. Gunn G8IFF/W8IFF