Convert Square Arcsecond to Microsteradian

Type the number of square arcseconds that you wish to convert to microsteradians.

1 arcsec² (square arcseconds) = 2.35044e-5 μsr (microsteradians)

How to Convert Square Arcseconds to Microsteradians

The square arcsecond and microsteradian are both units of solid angle. 1 microsteradian equals 42545.225575 square arcseconds. This means to convert square arcseconds to microsteradians, you divide by 42545.225575.

Formula

microsteradians = square arcseconds ÷ 42545.225575

Step-by-Step Example

Convert 5 arcsec² to microsteradians:

1
Convert 5 arcsec² to microsteradians

We need to convert square arcseconds to microsteradians

2
Apply the formula

Since 1 μsr = 42545.225575 arcsec², divide by 42545.225575

5 ÷ 42545.225575 = 0.000117522

Answer

5 arcsec² = 0.000117522 μsr

Square Arcsecond to Microsteradian Conversion Table

Quick reference table for common square arcsecond to microsteradian conversions. Click any value for detailed calculation.

Square Arcseconds (arcsec²) Microsteradians (μsr)
0.1 arcsec² 2.35044e-6 μsr
0.5 arcsec² 1.17522e-5 μsr
1 arcsec² 2.35044e-5 μsr
2 arcsec² 4.70088e-5 μsr
5 arcsec² 0.000117522 μsr
10 arcsec² 0.000235044 μsr
25 arcsec² 0.00058761 μsr
50 arcsec² 0.00117522 μsr
100 arcsec² 0.00235044 μsr

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.

Microsteradian (μsr)

A microsteradian (μsr) equals 10⁻⁶ steradians or about 11.8 square arcminutes. Used in astronomy for field of view specifications, laser beam divergence measurements, and telescope aperture calculations. A typical star appears as ~1 μsr from Earth.

Frequently Asked Questions

How do I convert square arcseconds to microsteradians?

To convert square arcseconds to microsteradians, divide the value by 42545.225575. For example, 10 arcsec² = 0.000235044 μsr.

How many microsteradians are in 1 square arcsecond?

1 square arcsecond equals 2.35044e-5 microsteradians.

What is the formula for square arcseconds to microsteradians?

The formula is: μsr = arcsec² ÷ 42545.225575.