Convert Square Arcsecond to Spat
Enter the number of square arcseconds that you want to convert to spats.
How to Convert Square Arcseconds to Spats
The square arcsecond and spat are both units of solid angle. 1 spat equals 534639072429 square arcseconds. This means to convert square arcseconds to spats, you divide by 534639072429.
Formula
Step-by-Step Example
Convert 5 arcsec² to spats:
We need to convert square arcseconds to spats
Since 1 sp = 534639072429 arcsec², divide by 534639072429
5 ÷ 534639072429 = 9.3521036113e-12
5 arcsec² = 9.3521036113e-12 sp
Square Arcsecond to Spat Conversion Table
Quick reference table for common square arcsecond to spat conversions. Click any value for detailed calculation.
| Square Arcseconds (arcsec²) | Spats (sp) |
|---|---|
| 0.1 arcsec² | 1.8704207223e-13 sp |
| 0.5 arcsec² | 9.3521036113e-13 sp |
| 1 arcsec² | 1.8704207223e-12 sp |
| 2 arcsec² | 3.7408414445e-12 sp |
| 5 arcsec² | 9.3521036113e-12 sp |
| 10 arcsec² | 1.8704207223e-11 sp |
| 25 arcsec² | 4.6760518056e-11 sp |
| 50 arcsec² | 9.3521036113e-11 sp |
| 100 arcsec² | 1.8704207223e-10 sp |
About These Units
Square Arcsecond (arcsec²)
A square arcsecond equals (1/3600)² of a square degree or about 2.35×10⁻¹¹ steradians. One square arcminute = 3,600 square arcseconds. Measures individual star disks, exoplanet host star separation, and high-resolution imaging pixels.
Spat (sp)
The spat equals 4π steradians (≈12.566 sr)—the solid angle subtended by a complete sphere as seen from its center. One spat = 41,253 square degrees = 1 full sphere. Used in radiation physics and isotropic source calculations. Rarely used; steradians preferred.
Frequently Asked Questions
How do I convert square arcseconds to spats?
To convert square arcseconds to spats, divide the value by 534639072429. For example, 10 arcsec² = 1.8704207223e-11 sp.
How many spats are in 1 square arcsecond?
1 square arcsecond equals 1.8704207223e-12 spats.
What is the formula for square arcseconds to spats?
The formula is: sp = arcsec² ÷ 534639072429.