Milliarcsecond to Arcsecond Converter
Conversion Formula
Factor
Formula
Unit Description
Milliarcsecond (mas)
Definition
A milliarcsecond (mas) is a unit of angular measurement equal to 1/1000 of an arcsecond or 1/3,600,000 of a degree. It represents the finest level of angular precision commonly used in astronomy.
History
Milliarcseconds became necessary with the advent of very long baseline interferometry (VLBI) and space-based telescopes in the late 20th century. This precision level was unattainable until advanced radio astronomy techniques and space missions like Hipparcos and Gaia made such measurements possible.
Current Use
Milliarcseconds are used in cutting-edge astronomical research for measuring stellar parallax, proper motion of stars, positions of quasars, and in very long baseline interferometry. They're essential for the most precise astrometric measurements and are used by space missions like Gaia for creating detailed star catalogs.
Arcsecond (″)
Definition
An arcsecond (″) is a unit of angular measurement equal to 1/60 of an arcminute or 1/3600 of a degree. It represents extremely fine angular precision, essential for high-precision measurements.
History
The arcsecond follows from the continued subdivision of the Babylonian system, where arcminutes were further divided into 60 arcseconds. The term comes from 'pars minuta secunda' meaning 'second small part'. This level of precision became crucial with the development of telescopic astronomy in the 17th century.
Current Use
Arcseconds are critical in professional astronomy for measuring stellar positions, parallax, and proper motion. They're used in satellite navigation systems, precision surveying, telescope specifications, and astrometry. The Hubble Space Telescope, for example, has angular resolution measured in arcseconds.
Conversion Table
Milliarcsecond(mas) | Arcsecond(″) |
---|---|
1 | 0.001 |
2 | 0.002 |
3 | 0.003 |
4 | 0.004 |
5 | 0.005 |
6 | 0.006 |
7 | 0.007 |
8 | 0.008 |
9 | 0.009 |
10 | 0.01 |
Conversion Examples
Convert 1 Milliarcsecond to Arcsecond
- Conversion Factor: 1 mas = 0.001 ″
- Conversion Formula: ″ = mas ÷ 1,000
- Calculation: 1 mas ÷ 1,000 = 0.001 ″
Convert 10 Milliarcsecond to Arcsecond
- Conversion Factor: 1 mas = 0.001 ″
- Conversion Formula: ″ = mas ÷ 1,000
- Calculation: 10 mas ÷ 1,000 = 0.01 ″
Convert 100 Milliarcsecond to Arcsecond
- Conversion Factor: 1 mas = 0.001 ″
- Conversion Formula: ″ = mas ÷ 1,000
- Calculation: 100 mas ÷ 1,000 = 0.1 ″
Convert 1,000 Milliarcsecond to Arcsecond
- Conversion Factor: 1 mas = 0.001 ″
- Conversion Formula: ″ = mas ÷ 1,000
- Calculation: 1,000 mas ÷ 1,000 = 1 ″