> For the complete documentation index, see [llms.txt](https://docs.ladybug.tools/ladybug-primer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ladybug.tools/ladybug-primer/components/4_extra/solar_body_parameters.md).

# Solar Body Parameters

![](/files/-MihilWU6jz1KTSkuRba)

![](/files/-MihilWV65YvOidpMsnF) - [\[source code\]](https://github.com/ladybug-tools/ladybug-grasshopper/blob/master/ladybug_grasshopper/src//LB%20Solar%20Body%20Parameters.py)

Create a set of parameters that define the characteristics of a human in relation to the sun that falls on them.

These parameters can be plugged into any of the components that estimate mean radiant temperature (MRT) deltas as a result of being in the sun.

### Inputs

* **posture**

A text string indicating the posture of the body. Letters must be lowercase. Default is "standing". Choose from the following:

```
- standing

- seated

- supine
```

* **sharp**

A number between 0 and 180 representing the solar horizontal angle relative to front of person (SHARP). 0 signifies sun that is shining directly into the person's face and 180 signifies sun that is shining at the person's back. Default is 135, asuming that a person typically faces their side or back to the sun to avoid glare.

* **body\_az**

A number between 0 and 360 representing the direction that the human is facing in degrees (0=North, 90=East, 180=South, 270=West). Default is None, which will assume that the sharp input dictates the degrees the human is facing from the sun.

* **absorptivity**

A number between 0 and 1 representing the average shortwave absorptivity of the body (including clothing and skin color). Typical clothing values - white: 0.2, khaki: 0.57, black: 0.88 Typical skin values - white: 0.57, brown: 0.65, black: 0.84 Default is 0.7 for average (brown) skin and medium clothing.

* **emissivity**

A number between 0 and 1 representing the average longwave emissivity of the body. Default is 0.95, which is almost always the case except in rare situations of wearing metalic clothing.

### Outputs

* **sol\_body\_par**

A solar body parameter object that can be plugged into any of the components that estimate mean radiant temperature (MRT) deltas as a result of being in the sun.