Tag Archives: 2014 MU69

Plan of New Horizons’ fly-by of 2014 MU69 announced

The New Horizons science team has announced its detailed plan for the January 1, 2019 fly-by of Kuiper Belt object 2014 MU69.

If all goes as planned, New Horizons will come to within just 2,175 miles (3,500 kilometers) of MU69 at closest approach, peering down on it from celestial north. The alternate plan, to be employed in certain contingency situations such as the discovery of debris near MU69, would take New Horizons within 6,000 miles (10,000 kilometers) — still closer than the 7,800-mile (12,500-kilometer) flyby distance to Pluto.

…If the closer approach is executed, the highest-resolution camera on New Horizons, the telescopic Long Range Reconnaissance Imager (LORRI) should be able to spot details as small as 230 feet (70 meters) across, for example, compared to nearly 600 feet (183 meters) on Pluto.

MU69 is thought to either be two objects orbiting very close to each other or an object similar to Comet 67P/C-G, two objects in contact but barely so.

In a related New Horizons story, the International Astronautical Union (IAU) has officially accepted 14 names chosen by the New Horizons team for features on Pluto.


MU69 is not round

New data about 2014 MU69, the Kuiper Belt object that New Horizons plans to fly past on January 1, 2019, suggests that it is either elongated or made of two objects almost touching.

Recent observations suggest that the rock is no more than 20 miles long, and its shape is not round or elliptical, like most space rocks. Instead, the icy body is either shaped like a stretched football, called an “extreme prolate spheroid,” or like two rocks joined together. That creates a rubber ducky shape similar to the comet that the European Space Agency landed on two years ago.

It’s even possible that the object is, in fact, two objects — like a pair of rocks that are orbiting around each other, or are so close that they’re touching. If 2014 MU69 does turn out to be two objects, then each one is probably between nine and 12 miles in diameter, according to the New Horizons team.

I predict that this object will be even weirder in shape that predicted. The low gravity in the Kuiper Belt almost guarantees it.


New Horizons team spots stellar eclipse by 2014 MU69

In an effort to learn as much as possible about New Horizons’ next target, Kuiper belt object 2014 MU69, the science team has successfully observed on July 17 a 0.2-second-long eclipse of a star by that object.

This was the third occultation by 2014 MU69 that the science team attempted to catch. With the first, on the ground, they saw nothing. The second, using the flying observatory SOFIA, was more successful, as was the third attempt last week.

Though they haven’t yet released their findings, they say the data from the last two observations has allowed them to determine the rough shape and size of 2014 MU69. This is crucial information needed for planning the observations of it during New Horizons January 1, 2019 fly-by.


New Horizons’ next target might be smaller than predicted

The uncertainty of science: Because all attempts to observe an occultation of a star on June 3 by New Horizons’ next target failed, astronomers now think Kuiper Belt object 2014 MU69 is much smaller than previously believed.

The discovery observations using Hubble and other ground-based telescopes had estimated its size as between 12 to 25 miles in diameter. The null result from the June 3 event suggests it is smaller than that.

More occultations are upcoming, so stay tuned.


New Horizons goes back to sleep

The New Horizons science and engineering team has placed the spacecraft back in hibernation mode for the first time since prior to its fly-by of Pluto in 2014.

During hibernation mode, much of the New Horizons spacecraft is unpowered. The onboard flight computer monitors system health and broadcasts a weekly beacon-status tone back to Earth, and about once a month sends home data on spacecraft health and safety. Onboard sequences sent in advance by mission controllers will eventually wake New Horizons to check out critical systems, gather new Kuiper Belt science data, and perform course corrections (if necessary).

This hibernation period will last until September, when they will wake the spacecraft so that they can make a mid-course correction in preparation for the January 1, 2019 flyby of Kuiper Belt Object 2014 MU69.


New Horizons halfway to 2014 MU69

Since flying past Pluto in July 2014 New Horizons has now flown halfway to its next target, Kuiper Belt Object 2014 MU69.

The fly-by will take place on January 1, 2019.

Posted from the South Rim after hiking out today from the bottom of the Grand Canyon. Since Saturday I did about 40 miles of hiking, both near and inside the Canyon. I hope to post some details in the coming days.


New Horizons adjusts its course

New Horizons successfully completed today a short 44 second engine burn to refine its course towards its January 1, 2019 flyby of Kuiper Belt Object 2014 MU69.

The spacecraft had also been making observations this past week of six other Kuiper Belt Objects, the data of which will be sent home over the coming weeks.


NASA okays New Horizons mission extension, rejects Dawn asteroid fly-by

NASA has approved an extension of the New Horizons mission to fly past Kuiper Belt object 2014 MU69 on January 1, 2019.

In the same press release the agency announced that they have decided that they will get more worthwhile science by keeping Dawn in orbit around Ceres for the reminder of its life, rather then sending it on a proposed fly by of another asteroid.


New Horizons on the way to 2014 MU69

On Wednesday New Horizons successfully completed the fourth and last engine burn to change its trajectory to rendezvous with Kuiper Belt object 2014 MU69 in January 2019.

These were the spacecraft’s longest and most complicated mid-course corrections. They were also achieved at a greater distance from Earth than any previous such maneuver.


New Horizons team picks its next Kuiper Belt target

The New Horizons science team has picked its next Kuiper Belt fly-by target beyond Pluto.

New Horizons will perform a series of four maneuvers in late October and early November to set its course toward 2014 MU69 – nicknamed “PT1” (for “Potential Target 1”) – which it expects to reach on January 1, 2019. Any delays from those dates would cost precious fuel and add mission risk. “2014 MU69 is a great choice because it is just the kind of ancient KBO, formed where it orbits now, that the Decadal Survey desired us to fly by,” said New Horizons Principal Investigator Alan Stern, of the Southwest Research Institute (SwRI) in Boulder, Colorado. “Moreover, this KBO costs less fuel to reach [than other candidate targets], leaving more fuel for the flyby, for ancillary science, and greater fuel reserves to protect against the unforeseen.”

The press release includes some silly gobbly-gook about how the science team can’t announce this as its official target because they still have to write up a proposal to submit to NASA, which then must ponder their decision and decree it valid. We all know this is ridiculous. Will NASA sit and ponder and make them miss their target? I doubt it.

The fly-by itself will be really exciting, because this object will truly be the most unusual we will have ever gotten a close look at, as it has spent its entire existence far out in the dim reaches of the solar system.