Reference · Satellites: orbital elements in, positions out
ElementSettype
One satellite's orbital elements in the "GP" format that CelesTrak and Space-Track both serve as JSON (CCSDS OMM, one object per satellite). Only these fields are read. The package fetches nothing: your page gets the elements (see the satellites guide for the rules of the sources) and passes them in.
Import it
import type { ElementSet } from "@johnmorrisdotca/chikyu-earth/satellites";Definition
interface ElementSet {
OBJECT_NAME: string;
OBJECT_ID?: string;
EPOCH: string;
MEAN_MOTION: number;
ECCENTRICITY: number;
INCLINATION: number;
RA_OF_ASC_NODE: number;
ARG_OF_PERICENTER: number;
MEAN_ANOMALY: number;
NORAD_CAT_ID: number;
BSTAR: number;
MEAN_MOTION_DOT: number;
MEAN_MOTION_DDOT: number;
EPHEMERIS_TYPE?: number;
CLASSIFICATION_TYPE?: string;
ELEMENT_SET_NO?: number;
REV_AT_EPOCH?: number;
}Members
| Name | Type | Description |
|---|---|---|
OBJECT_NAME | string | |
OBJECT_ID (optional) | string | undefined | |
EPOCH | string | The moment the elements describe, ISO 8601 in UTC (a trailing |
MEAN_MOTION | number | Revolutions a day. |
ECCENTRICITY | number | |
INCLINATION | number | Degrees. |
RA_OF_ASC_NODE | number | Degrees. |
ARG_OF_PERICENTER | number | Degrees. |
MEAN_ANOMALY | number | Degrees. |
NORAD_CAT_ID | number | |
BSTAR | number | |
MEAN_MOTION_DOT | number | |
MEAN_MOTION_DDOT | number | |
EPHEMERIS_TYPE (optional) | number | undefined | |
CLASSIFICATION_TYPE (optional) | string | undefined | |
ELEMENT_SET_NO (optional) | number | undefined | |
REV_AT_EPOCH (optional) | number | undefined |
Examples
import type { ElementSet } from "@johnmorrisdotca/chikyu-earth/satellites";
const iss: ElementSet = {
OBJECT_NAME: "ISS (ZARYA)",
OBJECT_ID: "1998-067A",
EPOCH: "2026-11-02T10:25:21.580320",
MEAN_MOTION: 15.49150046,
ECCENTRICITY: 0.0007139,
INCLINATION: 51.6332,
RA_OF_ASC_NODE: 335.9757,
ARG_OF_PERICENTER: 339.3739,
MEAN_ANOMALY: 20.6961,
NORAD_CAT_ID: 25544,
BSTAR: 0.00012,
MEAN_MOTION_DOT: 0.0001,
MEAN_MOTION_DDOT: 0,
};
console.log(iss.OBJECT_NAME);ISS (ZARYA)What it prints (run when this page was built)