## Minute and second of arc |

Arcminute | |
---|---|

An illustration of the size of an arcminute (not to scale.) A standard | |

General information | |

Non-SI units mentioned in the SI | |

Unit of | |

Symbol | |

In units | |

Conversions | |

1 | ... is equal to ... |

| 1/60° = 0.016° |

| 60′′ |

| π/10800 ≈ 0.000290888 rad |

| ≈ 0.2908 mil |

| 600/9^{g} = 66.6^{g} |

| 1/21600 |

A **minute of arc**, **arcminute** (arcmin), **arc minute**, or **minute arc** is a unit of

A **second of arc**, **arcsecond** (arcsec), or **arc second** is 1/60 of an arcminute, 1/ 3600 of a degree, 1/296000 1 of a turn, and π/000 648 (about 1/265 206) of a radian.These units originated in

To express even smaller angles, standard **milliarcsecond** (mas) and **microarcsecond** (μas), for instance, are commonly used in astronomy.

The number of square arcminutes in a complete sphere is 510660 square arcminutes (the surface area of a unit sphere in square units divided by the solid angle area subtended by a square arcminute, also in square units – so that the final result is a dimensionless number). 148

- symbols and abbreviations
- common examples
- uses
- see also
- notes
- references
- external links

The standard^{[1]} symbol for marking the arcminute is the **arcmin** or **amin** or, less commonly, the prime with a

The standard^{[1]} symbol for the arcsecond is the **arcsec** or **asec**.

Unit | Value | Symbol | Abbreviations | In radians, approx. |
---|---|---|---|---|

1/360 turn | ° ( |
deg | 2925 | |

Arcminute | 1/60 degree | ′ ( |
arcmin, amin, am, , MOA | 2087 μrad 290.888 |

Arcsecond | 1/60 arcminute = 1/3600 degree | ″ (double prime) | arcsec, asec, as | 1368 μrad 4.848 |

Milliarcsecond | 0.001 arcsecond = 1/3600000 degree | mas | 1368 nrad 4.848 | |

Microarcsecond | 0.001 mas = 001 arcsecond 0.000 | μas | 1368 prad 4.848 |

In ^{[2]}^{[3]} This notation has been carried over into ^{[4]}

Other Languages

العربية: دقيقة وثانية القوس

हिन्दी: चाप के मिनट और सैकिंड

Bahasa Melayu: Minit dan saat arka

ਪੰਜਾਬੀ: ਚਾਪ ਦੇ ਮਿੰਟ ਅਤੇ ਸਕਿੰਟ

Scots: Meenit an seicont o arc

українська: Кутова мінута і секунда