Category Archives: Juno

Where’s Juno?



In case you were wondering where Juno is on the trip to Jupiter, wonder no more.

81 days to go!

From NASA (25 March 2016):

As of March 25, 2016, Juno is approximately 410 million miles (659 million kilometers) from Earth. The one-way radio signal travel time between Earth and Juno is currently about 37 minutes.

Juno is traveling at a velocity of approximately 53,000 miles per hour (about 23.6 kilometers per second) relative to Earth, 16,000 miles per hour (about 7.1 kilometers per second) relative to the Sun, and 13,000 miles per hour (about 5.7 kilometers per second) relative to Jupiter. Juno has now travelled 1.73 billion miles (2.78 billion kilometers, or 18.56 AU) since launch, and has another 34 million miles to go (55 million kilometers, or 0.37 AU) before entering orbit around Jupiter.

The Juno spacecraft is in excellent health and is operating nominally.

Juno is slated to arrive at the gas giant planet on July 4, 2016, at 8:35 p.m. PDT (Earth Received Time). Track and visualize Juno’s journey through space using NASA’s Eyes on the Solar System 3D interactive.

Juno’s onboard color camera, called JunoCam, invites the public to serve as a virtual imaging team. Vote and comment on where to point JunoCam and which features to image on Jupiter using the new JunoCam web platform at

 Image: NASA

Jupiter Here We Come


We’ve been patiently waiting for the Juno spacecraft to arrive at Jupiter and finally: Here we go!

Click NASA’s infographic above for a larger (more readable version),

Credits: NASA/JPL-Caltech

From NASA:
NASA’s solar-powered Juno spacecraft successfully executed a maneuver to adjust its flight path today, Feb. 3. The maneuver refined the spacecraft’s trajectory, helping set the stage for Juno’s arrival at the solar system’s largest planetary inhabitant five months and a day from now.

“This is the first of two trajectory adjustments that fine tune Juno’s orbit around the sun, perfecting our rendezvous with Jupiter on July 4th at 8:18 p.m. PDT [11:18 p.m. EDT],” said Scott Bolton, Juno principal investigator at the Southwest Research Institute in San Antonio.

The maneuver began at 10:38 a.m. PST (1:38 p.m. EST). The Juno spacecraft’s thrusters fired for 35 minutes, consumed about 1.2 pounds (.56 kilograms) of fuel, and changed the spacecraft’s speed by 1 foot (0.31 meters), per second. At the time of the maneuver, Juno was about 51 million miles (82 million kilometers) from Jupiter and approximately 425 million miles (684 million kilometers) from Earth. The next trajectory correction maneuver is scheduled for May 31.

Juno was launched on Aug. 5, 2011. The spacecraft will orbit the Jovian world 33 times, skimming to within 3,100 miles (5,000 kilometers) above the planet’s cloud tops every 14 days. During the flybys, Juno will probe beneath the obscuring cloud cover of Jupiter and study its aurorae to learn more about the planet’s origins, structure, atmosphere and magnetosphere.

Juno’s name comes from Greek and Roman mythology. The god Jupiter drew a veil of clouds around himself to hide his mischief, and his wife — the goddess Juno — was able to peer through the clouds and reveal Jupiter’s true nature.

NASA’s Jet Propulsion Laboratory, Pasadena, California, manages the Juno mission for the principal investigator, Scott Bolton, of Southwest Research Institute in San Antonio. Juno is part of NASA’s New Frontiers Program, which is managed at NASA’s Marshall Space Flight Center in Huntsville, Alabama, for NASA’s Science Mission Directorate. Lockheed Martin Space Systems, Denver, built the spacecraft. The California Institute of Technology in Pasadena manages JPL for NASA.

Juno Mission

Juno spacecraft will reach Jupiter in July 2016 a few days ago NASA.  A public discussion was held at the Von Karman Auditorium, NASA-JPL, Pasadena, California on 05 Nov 2015.


Juno update

Juno’s position on 18 Jan 2013. from the Solar System Simulator (linked below)

Since I’ve been looking at a couple updates from long duration missions this week (including the Rosetta Wake up now just hours away!!) I was wondering about what was going on with Juno.

The image depicts Juno’s position today, which by the way you can look at anytime along with a variety of other spacecraft to include Rosetta and the Voyagers, even moons at the NASA/JPL Solar System Simulator.

So, there’s not much to tell. I know, that sounds funny, the fact of the matter is this is good, it means all is well. Additional parts of the solar panel arrays were enabled by the Juno Operations team according to schedule on 07 January. The extra power will be necessary as the spacecraft jets further from the Sun. The last of the panels will be enabled in September.

NASA has a 10 January update of the journey so far:

Distance from Earth: 125 million km / 78 million miles

Radio distance (one way): about 7 minutes

Relative to Sun (about): 28 km/sec or 17 miles/sec
Relative to Earth (about): 26 km/sec or 16 miles/sec

Odometer: 1.87 billion km / 1.16 billion miles. This is also 12.5 AU (6.25 round trips to the Sun)