Moving targets - Converter for ephemeris files
This online converter allows you to upload an ephemeris file produced with the JPL Horizons tool and to retrieve it in a format suitable for use with your Observation Blocks prepared with P2PP. Simply upload the Horizons file, optionally choose a name for the resulting file and click on 'Convert'.
Convert your Horizons file to VLT format
Please note: the following settings must be used when running the JPL Horizons tool in order to produce a VLT-compliant ephemeris file:
- In the "Current Settings" table set the value in the right column:
| Current Settings | |
|---|---|
| Ephemeris type | OBSERVER |
| Target Body | favorite target or reference object |
| Observer Location | Cerro Paranal [309] |
| Time Span | start and end of the ephemerides, time step |
| Display/Output | download/save |
- The "Table Settings" parameters should have the following values:
| Table Settings | |
|---|---|
| observer quantities | 1 Astrometric RA & DEC 3 Rates: RA & DEC 9 Visual mag. & Surface Brght (other quantities are optional) |
| day/time format | Julian day |
| angle format | hours/degrees minutes seconds |
| Refraction model | airless model (no refraction) |
| Airmass Limit | 2.6 (or smaller) |
| Elevation cutoff | 20 (or larger) |
| Skip daylight | checked |
| Extra precision | checked |
| Reference system | ICRF/J2000.0 |
| CSV format | checked |