An arcsecond is a fascinating unit of angular measurement used extensively in astronomy and geodesy. To grasp its minuteness, consider that an arcsecond is 1/3600th of a degree, and there are 360 degrees in a full circle. For practical perspective, the apparent size of a U.S. dime viewed from about 4 kilometers (or 2.5 miles) away roughly equals an arcsecond.
In the realm of astronomy, arcseconds are crucial for measuring celestial events and distances. The Hubble Space Telescope’s resolution power is often celebrated for its ability to distinguish details as tiny as about 0.05 arcseconds—akin to seeing a bumblebee 800 kilometers away! This unit’s precision is vital for understanding the cosmos, from determining stellar positions to mapping distant galaxies.
A degree is a versatile unit used to measure angles, temperature, and even geographic coordinates. When it comes to angles, the degree’s origin traces back to ancient Babylon, where mathematicians used a base-60 number system. This influence is why there are 360 degrees in a circle—a number easily divisible into many integer parts, allowing for precise calculations.
In navigation and cartography, degrees are crucial for pinpointing locations on Earth’s surface through latitude and longitude. Notably, each degree of latitude encompasses about 111 kilometers on the planet’s surface. Meanwhile, in temperature measurement, degrees Fahrenheit and Celsius reveal a fascinating convergence: −40°F is equivalent to −40°C, a curiosity often unknown by many. These uses highlight the degree’s essential role across various fields of science and everyday life.
Arcseconds | Degrees |
---|---|
0
arcsec
|
0
deg
|
50
arcsec
|
0.0138889
deg
|
100
arcsec
|
0.0277778
deg
|
150
arcsec
|
0.0416667
deg
|
200
arcsec
|
0.0555556
deg
|
250
arcsec
|
0.0694444
deg
|
300
arcsec
|
0.0833333
deg
|
350
arcsec
|
0.0972222
deg
|
400
arcsec
|
0.111111
deg
|
450
arcsec
|
0.125
deg
|
500
arcsec
|
0.138889
deg
|
550
arcsec
|
0.152778
deg
|
600
arcsec
|
0.166667
deg
|
650
arcsec
|
0.180556
deg
|
700
arcsec
|
0.194444
deg
|
750
arcsec
|
0.208333
deg
|
800
arcsec
|
0.222222
deg
|
850
arcsec
|
0.236111
deg
|
900
arcsec
|
0.25
deg
|
950
arcsec
|
0.263889
deg
|
1000
arcsec
|
0.277778
deg
|
1050
arcsec
|
0.291667
deg
|
1100
arcsec
|
0.305556
deg
|
1150
arcsec
|
0.319444
deg
|
1200
arcsec
|
0.333333
deg
|
1250
arcsec
|
0.347222
deg
|
1300
arcsec
|
0.361111
deg
|
1350
arcsec
|
0.375
deg
|
1400
arcsec
|
0.388889
deg
|
1450
arcsec
|
0.402778
deg
|
1500
arcsec
|
0.416667
deg
|
1550
arcsec
|
0.430556
deg
|
1600
arcsec
|
0.444444
deg
|
1650
arcsec
|
0.458333
deg
|
1700
arcsec
|
0.472222
deg
|
1750
arcsec
|
0.486111
deg
|
1800
arcsec
|
0.5
deg
|
1850
arcsec
|
0.513889
deg
|
1900
arcsec
|
0.527778
deg
|
1950
arcsec
|
0.541667
deg
|
2000
arcsec
|
0.555556
deg
|
2050
arcsec
|
0.569444
deg
|
2100
arcsec
|
0.583333
deg
|
2150
arcsec
|
0.597222
deg
|
2200
arcsec
|
0.611111
deg
|
2250
arcsec
|
0.625
deg
|
2300
arcsec
|
0.638889
deg
|
2350
arcsec
|
0.652778
deg
|
2400
arcsec
|
0.666667
deg
|
2450
arcsec
|
0.680556
deg
|
2500
arcsec
|
0.694444
deg
|
2550
arcsec
|
0.708333
deg
|
2600
arcsec
|
0.722222
deg
|
2650
arcsec
|
0.736111
deg
|
2700
arcsec
|
0.75
deg
|
2750
arcsec
|
0.763889
deg
|
2800
arcsec
|
0.777778
deg
|
2850
arcsec
|
0.791667
deg
|
2900
arcsec
|
0.805556
deg
|
2950
arcsec
|
0.819444
deg
|
3000
arcsec
|
0.833333
deg
|
3050
arcsec
|
0.847222
deg
|
3100
arcsec
|
0.861111
deg
|
3150
arcsec
|
0.875
deg
|
3200
arcsec
|
0.888889
deg
|
3250
arcsec
|
0.902778
deg
|
3300
arcsec
|
0.916667
deg
|
3350
arcsec
|
0.930556
deg
|
3400
arcsec
|
0.944444
deg
|
3450
arcsec
|
0.958333
deg
|
3500
arcsec
|
0.972222
deg
|
3550
arcsec
|
0.986111
deg
|
3600
arcsec
|
1
deg
|
Conversion | Call to Action |
---|---|
Arcseconds to Radians | Go to converter |
Arcseconds to Gradians | Go to converter |
Arcseconds to Arcminutes | Go to converter |