Parsec to Earth's Equatorial Radius Converter
Unit Converter
Instant · Precise · Universal
32 units available
6 categories total
How to Convert Parsec to Earth's Equatorial Radius
To convert pc to light-years: multiply by 3.2616. To convert pc to AU: multiply by 206,265.
1 pc = 3.0857 × 10¹⁶ m = 3.2616 ly = 206,265 AU ≈ 30.857 trillion km.
For example, 1 Parsec (pc) = 4837933083 Earth's Equatorial Radius (R⊕ (eq)).
Parsec to Earth's Equatorial Radius — Common Values
| Parsec (pc) | Earth's Equatorial Radius (R⊕ (eq)) |
|---|---|
| 0.1 | 483793308.3 |
| 0.5 | 2418966541 |
| 1 | 4837933083 |
| 2 | 9675866166 |
| 5 | 24189665410 |
| 10 | 48379330830 |
| 25 | 120948327100 |
| 50 | 241896654100 |
| 100 | 483793308300 |
| 500 | 2.418967e+12 |
| 1000 | 4.837933e+12 |
About Parsec (pc)
Definition
The parsec is an astronomical unit of length defined as the distance at which one astronomical unit subtends an angle of one arcsecond.
Mathematical Relationship
1 pc = 3.0857 × 10¹⁶ m = 3.2616 ly = 206,265 AU ≈ 30.857 trillion km.
Conversion Formula
To convert pc to light-years: multiply by 3.2616. To convert pc to AU: multiply by 206,265.
Practical Applications
Stellar catalogs, galaxy surveys, and cosmological distance calculations.
Interesting Facts
No known star is within 1 parsec of the Sun. Proxima Centauri is 1.30 pc away, making it the nearest star.
Common Mistakes
Pronouncing or interpreting 'parsec' as a unit of time (famously misused in Star Wars). It is strictly a distance unit.
Educational Tips
The parsec is defined geometrically: if a star's parallax (apparent shift over 6 months) is 1 arcsecond, it's 1 pc away.
About Earth's Equatorial Radius (R⊕ (eq))
Definition
The Earth's equatorial radius is the distance from Earth's center to the equator, approximately 6,378.137 km.
Mathematical Relationship
R⊕(eq) = 6,378,137 m = 6,378.137 km. Earth's oblateness = (R_eq − R_pol)/R_eq ≈ 1/298.257.
Conversion Formula
To convert Earth radii to meters: multiply by 6,378,137.
Practical Applications
GPS calculations, satellite orbit determination, map projections, and geophysical modeling.
Interesting Facts
Earth is not a perfect sphere — the equatorial radius is about 21 km (0.3%) larger than the polar radius due to rotational flattening.
Common Mistakes
Using the equatorial radius as if Earth were a sphere — for precision, you must account for the oblate spheroid shape.
Educational Tips
Earth's equatorial radius (6,378 km) vs. polar radius (6,357 km) shows the planet bulges at the equator due to spinning.