# PSYS_SRC_TARGET_KEY

*LSL constant*

```lsl
integer PSYS_SRC_TARGET_KEY = 20;
```

Key (UUID) of the target object that particles travel toward when PSYS_PART_TARGET_POS_MASK or PSYS_PART_TARGET_LINEAR_MASK is enabled.

Constant groups: [ParticleParam](/constants/groups/ParticleParam/)

:::note[Documentation]
This entry is documented in the LSL definitions. No matching wiki article is present in this local collection. Its inclusion here does not establish availability on every simulator.
:::

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From lsl.dev: https://lsl.dev/constants/PSYS_SRC_TARGET_KEY/