Convert Earth's polar radius to astronomical unit
Please provide values below to convert Earth's polar radius [R_p] to astronomical unit [AU, UA], or Convert astronomical unit to Earth's polar radius.
1 R_p = 4.2492264564e-05 AU, UA. To convert Earth's polar radius to astronomical unit, multiply the value by 4.2492264564e-05; to go the other way, divide by it (1 AU, UA = 23533.6951386 R_p). Both units measure length and appear in everyday as well as technical calculations, so switching between them quickly is often useful.
Quick Reference
- 1 R_p = 4.2492264564e-05 AU, UA
- 1 AU, UA = 23533.6951386 R_p
- 10 R_p = 0.00042492264564 AU, UA
- 100 R_p = 0.0042492264564 AU, UA
How to Convert Earth's Polar Radius to Astronomical Unit
1 R_p = 4.24922645640303e-05 AU, UA
Example: convert 15 R_p to AU, UA:
15 R_p = 15 × 4.24922645640303e-05 AU, UA = 0.000637383968460455 AU, UA
Earth's Polar Radius to Astronomical Unit Conversion Table
| Earth's polar radius | astronomical unit |
|---|---|
| 1 R_p | 4.2492264564e-05 AU, UA |
| 2 R_p | 8.49845291281e-05 AU, UA |
| 3 R_p | 0.000127476793692 AU, UA |
| 5 R_p | 0.00021246132282 AU, UA |
| 10 R_p | 0.00042492264564 AU, UA |
| 20 R_p | 0.000849845291281 AU, UA |
| 50 R_p | 0.0021246132282 AU, UA |
| 100 R_p | 0.0042492264564 AU, UA |
| 500 R_p | 0.021246132282 AU, UA |
| 1000 R_p | 0.042492264564 AU, UA |
Earth's Polar Radius
The Earth's polar radius is the distance from the center of the Earth to the North or South Pole, approximately 6,356.8 kilometers.
History/Origin
The fact that the Earth is an oblate spheroid, flattened at the poles, has been known since the 18th century. Modern measurements are made with high precision.
Current Use
The Earth's polar radius is a key parameter in geodesy and is used to define the Earth's shape and gravitational field.
Astronomical Unit
The astronomical unit is a unit of length, now defined as exactly 149,597,870,700 meters. It is approximately the average distance between the Earth and the Sun.
History/Origin
Historically, the astronomical unit was the mean Earth-Sun distance. In 2012, the International Astronomical Union (IAU) redefined it as a fixed constant.
Current Use
The astronomical unit is used primarily for measuring distances within the Solar System or around other stars.
Frequently Asked Questions
What is 1 Earth's polar radius in astronomical unit?
1 Earth's polar radius (R_p) = 4.2492264564e-05 astronomical unit (AU, UA).
How do you convert Earth's polar radius to astronomical unit?
Multiply the Earth's polar radius value by 4.2492264564e-05. For example, 25 R_p × 4.2492264564e-05 = 0.0010623066141 AU, UA.
What is 10 Earth's polar radius in astronomical unit?
10 R_p = 0.00042492264564 AU, UA.
Which unit is larger, the Earth's polar radius or the astronomical unit?
The astronomical unit is the larger unit: 1 R_p equals only 4.2492264564e-05 AU, UA.