dV indicates that Juno utilizes a hyperbolic excess velocity leveraging trajectory. This trajectory is attractive because it features a short flight time to Jupiter while saving launch energy costs.
The first longer Mission Phase of the Juno Mission is used to perform spacecraft health status checks to make sure all systems have survived the launch environment. Instruments are powered up and checked briefly to confirm vehicle health. In addition, vehicle deployments are performed.
(In Virgil's day, she was worshipped as the patron goddess of the Roman Empire.) She often sends her messenger, Iris, the goddess of the rainbow, to deal with affairs on earth. Juno is Aeneas 's main antagonist throughout the Aeneid.
Back on Mount Olympus, Jove tells Juno that Venus has been helping the Trojans. Juno asks to remove Turnus from the battle,... (full context) ...march to the battlefield, not to fight but to accompany their leaders for the duel. Juno, watching from a nearby mountain, speaks to Turnus's sister Juturna, a nymph of lakes.
Juno is Aeneas 's main antagonist throughout the Aeneid. She hates the Trojans for a number of personal, rather petty reasons, including the fact that the Trojans Ganymede and Paris had once offended her pride.
Neptune agrees,... (full context) Book 7. ...horses to the Trojans, and prepares a carriage led by half-god horses for Aeneas.
Juno sends Iris to end Dido's slow torment. Iris offers Dido' s body to the underworld, and... (full context) Book 5. Juno watches these celebrations from the heavens, and sends down Iris to investigate.
Book 1. Virgil gives some background about Carthage, Juno 's favorite city, a rich and old Phoenician settlement located in North Africa ( modern-day Tunisia).
Now the Trojans are sailing near Sicily. Juno angrily recalls a time when Minerva burned Greek ships. Juno, prideful about her power, wonders... (full context) Juno goes to Aeolus, the wind god, who keeps the winds in his dungeon.
Juno goes to the fury-goddess Allecto and instructs her to destroy Latium's peace and turn people... (full context) Allecto proudly shows her work to Juno, and offers to do more. Juno refuses the offer and sends Allecto away. The crazed... (full context) Book 8. ...Arcadian king, Evander, to his side.
On a close flyby, passing less than 2,200 miles (3,500 kilometers) above Jupiter’s cloud tops, Juno dodged Jupiter’s shadow to avoid freezing. Then the spacecraft discovered a new, giant cyclone at Jupiter’s south pole. A pattern of six cyclones, with one in the center, had seemed locked in place, but a new cyclone had somehow muscled in. (December 2019)
1. First close glimpse of the north pole. As Juno moved into its polar orbit around Jupiter, JunoCam provided the first clear, cose-up pictures of the north pole — a strange, bluish region full of giant storms and strange weather. Unlike Saturn, Jupiter doesn't display a weird hexagonal jet stream at its north pole.
Nine -storm north pole. A central cyclone at Jupiter’s north pole is surrounded by eight more, as if they’re bowing in tribute.These cyclones range from 2,500 to 2,900 miles across (4,000 to 4,600 kilometers). Their spiral arms smack together as they spin, but the storms don’t merge, Juno data shows.
The cloud bands, or belts and zones, we can see from Earth have an intricate structure up close. Near the equator, they penetrate into the deepest parts of Jupiter’s atmosphere. But as you move closer to the poles, these belts tend to shapeshift into other structures. (May 2017)
Juno is a spin-stabilized spacecraft. The vehicle receives its initial spin-up from the Centaur Upper Stage which spins up the Spacecraft prior to separation. Spin stabilized spacecraft provide several advantages. First, spinning makes spacecraft pointing extremely stable and easy to control. Second, achieving vehicle stabilization by spinning eliminates the need of Reaction Wheels which would add weight to the spacecraft that would come at the cost of a science instrument. During its mission, Juno spins at different rates depending on mission maneuvers. During Cruise, Juno makes one rotation per minute, during science operations, the spin rate is 2rpm and for Main Engine Burns, the spin rate is increased to 5rpm.
Image: NASA/JPL/Caltech (Original Plan prior to Orbit Adjustment to 14 Days, but principle similar) Juno’s science mission has been designed to maximize the coverage of Jupiter in the first orbits of the mission before the later orbits focus on increasing the resolution of measurements.
After passing perijove on Orbit 37, Juno makes one last Orbit Trim Maneuver and waits until apojove to perform is deorbit maneuver. Making a controllable deorbit is a requirement of NASA’s Planetary Protection Guidelines. Deorbit ing the vehicle after a base-lined number of orbits is important since the qualification radiation dose is exceeded on additional orbits – increasing the risk of a hardware failure resulting in the less important LOM (Loss of Mission) at that point, but also presenting the problem of hazardous debris in a highly elliptical orbit crossing the trajectories of the Galilean Moons Callisto, Ganymede and Europa.
After passing perijove on Orbit 36 (Closest approach to Jupiter), Juno makes a deorbit burn to prepare for EOM (End of Mission) via destructive entry into the Gas Giant. When the Mission has ended, scientists perform two years of data analysis. Image: NASA.
Juno’s basic Trajectory. The name of Juno’s trajectory to Jupiter is formally known as ‘2+ dV-EGA’. EGA stands for Earth Gravity Assist and the 2+ specifies the timing of that flyby occurring a little more than two years into the mission. dV indicates that Juno utilizes a hyperbolic excess velocity leveraging trajectory.
Each mission phase has its own specific milestones and events as the long Juno mission progresses. The Juno flight begins in August 2011 and is planned to have a duration of six and a half years, lasting until February 2018.
During its mission, Juno spins at different rates depending on mission maneuvers. During Cruise, Juno makes one rotation per minute , during science operations, the spin rate is 2rpm and for Main Engine Burns, the spin rate is increased to 5rpm.
Juno is a rideshare service in NYC that is looking to poach the best of the best drivers from Uber and Lyft to create a top-notch ride experience for customers. They’re only working New York City for the moment, but there are plans to expand. Juno was founded by the same guy who created Viber, a messaging app that was sold for $900 million to Rakuten.
According to Juno, they’re a much friendlier and enjoyable way to drive and to use rideshare. For one, they say they pay their drivers more.
Do you live, work, or play in NYC? That would be a start. Juno will expand in the future, but for now, they’re only driving in New York. If you’re in NY and you want to give Juno a try, follow these steps to get started:
Juno has signup incentive promos on a reasonably regular basis. The promos are usually 30% off and are front and center on the sign-up page. If you’re already a Juno rider, you can refer your friends and receive a 30% discount for two weeks.
Juno gets its drivers from Uber and Lyft. You have to be a current Uber or Lyft driver even to be considered. Lyft drivers must have a 4.70 rating and Uber drivers need a rating of at least 4.65 to be accepted. You also have to be an existing TLC driver.
Juno wants to see more dollars in their drivers’ pockets.
Juno drivers can expect to earn more per ride. Juno only takes a 16.65% commission. That’s good news for Uber and Lyft drivers that are frustrated with their pay.