Planetary Simulant Database
Free Resource for Regolith Simulant Information
This mineralogy is for JSC-1A, the most recent iteration of this simulant
This bulk chemistry is also for JSC-1A.
These properties are from the original JSC-1 simulant.
|Mean grain size||81-105 μm|
|Median grain size||98-117 μm|
|Internal friction angle||45°|
Johnson Space Center JSC-1/1A/1AF/1AC/2A
Simulant Name: JSC-1/1A/1AF/1AC/2A Johnson Space Center
Availability: May Be Available
Developed By: Dave McKay & James Carter
Available From: N/A
Publications: McKay, D. S. et al. (1994), JSC-1: A New Lunar Soil Simulant. Engineering, Construction, and Operations in Space IV American Society of Civil Engineers, 857-866
The JSC-1 series is one of the best known simulants ever produced. It is a general use, low-Ti mare simulant made from volcanic ash in the San Francisco volcano field near Flagstaff, AZ. It contains a high glass fraction and is chemically similar to Apollo sample 14163. The ash was mined from a commercial cinder quarry and used to make the original JSC-1. 21.7 tons were produced by Dr. James Carter at a mill in Arizona.
After the original JSC-1 batch ran out, Dr. Carter produced another 16 tons at a custom facility, an effort coordinated through an SBIR grant to Orbitec. This included 14 tons of JSC-1A (a clone of JSC-1), and one ton each of JSC-1AF (the finest 20% fraction of JSC-1A, mean particle size 25 μm) and JSC-1AC (coarse version, up to 5 mm particles). A prototype of JSC-1A-VF (very fine) was also produced. As of 2018, the Orbitec simulant website is offline and JSC-1A is no longer commercially available. However, there are references to a JSC-2A produced by Zybek that was a replica of JSC-1A. It isn’t clear whether this product is still available. Dr. Carter intends to re-start production of JSC-1 later in 2018.
Photograph of JSC-1A: