3 feet
91.44 cmLength · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Length & distance
Just how long is 3 feet?
Up close
3 ft
3 feet
The quantity is exact as entered.
91.44 cmLength
0 - shared origin
Luna 2
Luna 2 was a Soviet spacecraft that became the first human-made object to impact the Moon in 1959.
90 cmSpherical bus diameter
0 - shared origin
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions. A ruler represents the selected distance or a measurement not visible in this view.
A little perspective
3 feet is about 1.02 times the spherical bus diameter of Luna 2.
Measurements, assumptions & sources +
3 feet
Length: 91.44 cm; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Luna 2
Spherical bus diameter: 90 cm; approximate.
Luna 2 used an approximately 0.9 m spherical spacecraft bus and had a mass of about 390.2 kg. Antennas and scientific booms extend beyond the calibrated body diameter.
The marked spherical bus diameter is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
Compare 3 feet with the spherical bus diameter of Luna 2. The notes below explain how each value was chosen.
Luna 2
90 cmSpherical bus diameter · approximate
Luna 2 used an approximately 0.9 m spherical spacecraft bus and had a mass of about 390.2 kg. Antennas and scientific booms extend beyond the calibrated body diameter.
- Comparing
- Length ↔ Spherical bus diameter
- Relative size
- 3 feet is about 1.02 times the spherical bus diameter of Luna 2. 3 feet is approximately 1.6% greater than the spherical bus diameter of Luna 2.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- The spherical bus diameter of Luna 2: This is an estimate; check the notes for its rounding and uncertainty.
This comparison follows the selected length only; other dimensions may differ.
0.9144 mmetres
0.00056818 mimiles
6.1124 × 10⁻¹² AUastronomical units
9.6652 × 10⁻¹⁷ lylight-years
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