Apsidal Precession GR 43 arcsec/Century Mercury Reference Lookup
Rounded Mercury relativistic perihelion contribution only, not total Newtonian-plus-relativistic precession.
Description
Apsidal Precession GR 43 arcsec/Century Mercury Reference Lookup: look up a supported built-in reference entry.
Apsidal precession is the gradual rotation of an orbit's periapsis direction. A rounded reference contribution is different from a complete orbital prediction.
This tool returns a built-in reference entry for an exact supported selector. The supported entries and their scope are part of the tool; no website or current external table is queried.
When to use this tool
Use this tool when the supplied inputs match the specific operation described above and you need a repeatable result under its stated convention.
- Check the supported input and output contract against an existing calculation or observation.
- Use the complete example to confirm units, selector spelling and result interpretation.
How to use the tool and how it works
- Enter every field in the input table using the stated units and the exact supported selector spelling where applicable.
- Run the tool. Correct input errors before interpreting an output.
- Read the result fields below; use accompanying flags and the stated sign, boundary or model convention when interpreting a number.
Accept rounded-relativistic-arcsec-per-century and return the built-in value 43.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| reference | Reference. | Exact value: "rounded-relativistic-arcsec-per-century" |
| reference | Built-in entry |
|---|---|
| "rounded-relativistic-arcsec-per-century" | 43 |
| Output field | Interpretation |
|---|---|
| result | Object containing the following named result fields. |
| result.reference | The stored entry for the exact selected key; its type may be text, a number or a list. |
{
"input": {
"reference": "rounded-relativistic-arcsec-per-century"
},
"output": {
"result": {
"reference": 43
}
}
}Limitations and assumptions
- The value is the tool's rounded Mercury reference; it does not model all precession contributions or their epoch dependence.
- Every declared field is required and unexpected fields are rejected. Numeric inputs must be finite; input errors are distinct from a valid false result or an explicitly qualified output.
- Extremely large inputs and nonfinite or excessively large outputs are rejected. List positions reported by the tool use zero-based indices unless stated otherwise.
Alternative or Complementary methods
Check the underlying observations, units and conventions independently before using the result in a larger workflow. The tools listed below address nearby tasks; compare their inputs and scope before substituting one for this operation.
References
Similar or alternative tools
- j2 nodal precession
First-order J2 precession rotates the ascending node of an inclined elliptic orbit.
- j2 periapsis precession
An oblate central body's J2 term causes secular argument-of-periapsis precession.