← INDEX — FIG. 00 — 4 JULY 2016, JUPITER ORBIT INSERTION
8.1 × 10⁶ × 4,200 km · 53.5 d
POLAR
JUNO AT JUPITER
Juno goes over Jupiter's poles.
BEGIN — CHAPTER 01 →CH.01 / 08 — LOOKING UNDER THE CLOUDS
What is inside the largest planet?
Jupiter holds more mass than all the other planets together.
Juno launched on 5 August 2011.
CH.02 / 08 — SUNLIGHT AND ARMOUR
A basketball court of solar panels, and a titanium vault
Juno's arrays give about 450 W at Jupiter.
A titanium vault protects the electronics.
CH.03 / 08 — CAPTURE, AND A VALVE THAT STUCK
A 14-day plan became a 53-day orbit
Juno was captured into a 53.5-day orbit.
NASA decided to stay in the 53-day orbit.
ELLIPTICAL ORBIT FROM PERIOD AND PERIJOVE
a = (GM T² / 4π²)1/3 · ra = 2a − rp · vp = √(GM (2/rp − 1/a))
GM of Jupiter = 1.26687 × 10⁸ km³/s².
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CH.04 / 08 — WEIGHING THE WINDS
The jet streams go 3,000 km down
Jupiter's gravity field is not symmetric.
The jets reach about 3,000 km deep.
TWO-WAY DOPPLER SHIFT
Δf ≈ 2 f Δv / c
Δf ≈ 2 f Δv / c.
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CH.05 / 08 — THE VIEW FROM THE TOP
Polygons of cyclones and a lopsided magnet
Eight cyclones around one at the north pole; five at the south.
Jupiter's magnetic field is unlike any other planet's.
CH.06 / 08 — THE EXTENDED MISSION
Ganymede, Europa and Io, each shortening the orbit
Juno flew past Ganymede, Europa and Io.
Each flyby shortened the orbit.
CH.07 / 08 — TEN YEARS OVER THE POLES
From launch to the 81st perijove
A valve turned a one-year mission into a decade.
CH.08 / 08 — REFERENCES