

| Type | Description | |||
| Long | A long expression that specifies the longitude of the center of the sphere described by the Size property, in thousandths of a second of arc, rounded away from the prime meridian. | 
The longitude of the center of the sphere described by the Size property, expressed as a 32-bit integer, most significant octet first (network standard byte order), in thousandths of a second of arc, rounded away from the prime meridian. 2^31 represents the prime meridian; numbers above that are east longitude. [RFC 1876]