API VERSION: 1.2
API SOURCE: NASA/JPL Horizons API

*******************************************************************************
 Revised: Sep 05, 2026      Nancy Grace Roman Space Telescope              -211
                 https://science.nasa.gov/mission/roman-space-telescope/
                               https://roman.gsfc.nasa.gov/
 
 BACKGROUND:
  The Nancy Grace Roman Space Telescope is a next-generation visible and 
  near-infrared wavelength space-based observatory. The mission lifetime is 
  at least five years. It can be refueled in-flight robotically.

  It launched 2026-Aug-30 11:26:04 UTC on a Falcon Heavy from Kennedy Space 
  Center (LC-39A) and will orbit the Earth-Sun L2 point.

  Objectives:
   * Search for extra-solar planets using gravitational microlensing
   * Probe chronology of the universe and growth of cosmic structure
   * Measure effects of dark energy, consistency of general relativity 
      and the curvature of spacetime
   * Detection of primordial black holes
 
 Roman Space Telescope:
   * Primary mirror size: 2.4 m
   * Primary mirror effective diameter: 2.36 m (aperture stop diameter)
   * Operating temperature: 298 K
   * Spacecraft bus 
       Downlink rate: 250-500 Mbps
       Data volume  : 11 Tbits/day

  Instruments:
   * Wide Field Instrument (WFI)
      300.8-megapixel camera providing multiband visible to near-infrared 
      (0.48 to 2.30-um imaging using one wideband and six narrowband filters.
   * Coronagraph Instrument
      High contrast covering wavelengths (575 nm to 825 nm) w/dual deformable 
      mirror starlight-suppression technology, enabling detection and 
      spectroscopy of planets with visual separation greater than 0.15 
      arcseconds from host stars
 
 SPACECRAFT TRAJECTORY:
  Post-launch trajectory from GSFC FDF on 2026-Sep-05.

 Trajectory files                             Start (TDB)         End (TDB) 
 ----------------------------------------  -----------------  -----------------
 RST_EPH_PRED_NOMNVR_2026242_2026270_01    2026-Aug-30 12:00  2026-Aug-31 04:34
 RST_EPH_PRED_2026243_2026271_02           2026-Aug-31 04:34  2026-Sep-04 18:36
 RST_EPH_PRED_2026247_2026275_02           2026-Sep-04 18:36  2026-Oct-02 18:36
*******************************************************************************