А теперь к Плутону (АМС New Horizons / Новые горизонты)

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http://pluto.jhuapl.edu/News-Center/News-Article.php?page=20181005
ЦитироватьOctober 05, 2018
New Horizons Sets Up for New Year's Flyby of Ultima Thule


At left, a composite optical navigation image, produced by combining 20 images fr om the New Horizons Long Range Reconnaissance Imager (LORRI) acquired on Sept. 24. The center photo is a composite optical navigation image of Ultima Thule after subtracting the background star field; star field subtraction is an important component of optical navigation image processing since it isolates Ultima fr om nearby stars. At right is a magnified view of the star-subtracted image, showing the close proximity and relative agreement between the observed and predicted locations of Ultima. Image Credit: NASA/JHUAPL/SwRI/KinetX

NASA's New Horizons spacecraft carried out a short engine burn on Oct. 3 to home in on the location and timing of its New Year's flyby of the Kuiper Belt object nicknamed Ultima Thule.

Word from the spacecraft that it had successfully performed the 3½-minute maneuver reached mission operations at the Johns Hopkins Applied Physics Laboratory in Laurel, Maryland, at around 10:20 p.m. EDT. The maneuver slightly tweaked the spacecraft's trajectory and bumped its speed by 2.1 meters per second – just about 4.6 miles per hour – keeping it on track to fly past Ultima (officially named 2014 MU69) at 12:33 am EST on Jan. 1, 2019.

"Thanks to this maneuver, we're right down the middle of the pike and on time for the farthest exploration of worlds in history – more than a billion miles beyond Pluto," said mission Principal Investigator Alan Stern of the Southwest Research Institute. "It almost sounds like science fiction, but it's not. Go New Horizons!"
Спойлер
At 4.1 billion miles (6.6 billion kilometers) from Earth, Ultima Thule will be the most distant object ever visited by a spacecraft. New Horizons itself was about 3.95 billion miles (6.35 billion kilometers) from home when it carried out Wednesday's trajectory correction maneuver (TCM), the farthest course-correction ever performed.

This was the first Ultima targeting maneuver that used pictures taken by New Horizons itself to determine the spacecraft's position relative to the Kuiper Belt object. These "optical navigation" images – gathered by New Horizons' Long Range Reconnaissance Imager (LORRI) – provide direct information of Ultima's position relative to New Horizons, and help the team determine wh ere the spacecraft is headed.

The New Horizons team designed the TCM by determining the current trajectories of the spacecraft and its target, and then calculating the maneuvering required to put the spacecraft at the desired "aim point" for the flyby – 2,200 miles (3,500 kilometers) from Ultima at closest approach.

"The recent navigation images have helped us confirm that Ultima is within about 300 miles [500 kilometers] of its expected position, which is exceptionally good," said Fred Pelletier, New Horizons navigation team chief, of KinetX Aerospace, Inc. "We're excited for the flyby."

Confirming that Ultima is at its expected location is an important and somewhat unique aspect of this flyby. "Since we are flying very fast and close to the surface of Ultima, approximately four times closer than the Pluto flyby in July 2015, the timing of the flyby must be very accurate," said Derek Nelson, New Horizons optical navigation lead, also from KinetX. "The images help to determine the position and timing of the flyby, but we must also trust the prior estimate of Ultima's position and velocity to ensure a successful flyby. These first images give us confidence that Ultima is wh ere we expected it to be, and the timing of the flyby will be accurate."

The spacecraft is just 69 million miles (112 million kilometers) from Ultima, closing in at 32,256 miles (51,911 kilometers) per hour. Pelletier said the team will eventually have to guide the spacecraft into an approximately 75 by 200-mile (120 by 320-kilometer) "box" and predict the flyby to within 140 seconds. "There is definitely more work to do," he said. "But we are taking pictures of the most distant world ever explored. How cool is that?"


Just 33 minutes into the New Year (Eastern Time), New Horizons will fly approximately 2,200 miles from the surface of a Kuiper Belt object nicknamed Ultima Thule – making it the farthest planetary object ever visited by a spacecraft. Image Credit: Roman Tkachenko
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tnt22

ЦитироватьPlutoSafari‏ @PlutoSafari 14 окт.

New Horizons position as of today. Truly on the door step! Getting more and more excited.
@AlanStern @NewHorizons2015


hlynin

Алан Стерн и др., "Новые Горизонты" за Плутоном: пролёт Ультима Туле (Alan Stern et al., New Horizons Beyond Pluto: The Ultima Thule Flyby) (на англ.) 24.10.2018 в pdf - 5,19 Мб
 Презентация слайдов с пресс-конференции 24 октября 2018 года. Обзор миссии - за пределами Плутона: Ультима Туле в контексте - Планы научных исследований пролёта - Цели миссии.
 Видео пресс-конференции (1 час):
 https://files.aas.org/dps50/DPS_50_Press_Webcast_10_24_2018.mp4

Чебурашка

Интересную ссылку нашёл на Астрофоруме. https://arxiv.org/ftp/arxiv/papers/1810/1810.07811.pdf
 УчОные подсчитали варианты траекторий для отправки АМС к объектам пояса Койпера..

К Эриде, увы, меньше чем за 20 лет не получается никак  :(

Например:  
Старт с Земли - 9 апреля 2034 года
Пролёт Юпитера - 29 мая 2035 года
Пролёт Нептуна - 20 ноября 2039 года
Прибытие к Эриде - 13 февраля 2057 года

Но есть и интересные варианты за разумные сроки

pkl

В общем, только солнечный глиссер и/или разгон на ионниках, питающихся от солнечных батарей.
Вообще, исследовать солнечную систему автоматами - это примерно то же самое, что посылать робота вместо себя в фитнес, качаться.Зомби. Просто Зомби (с)
Многоразовость - это бяка (с) Дмитрий Инфан

tnt22

ЦитироватьJonathan McDowell‏Подлинная учетная запись @planet4589 20 ч. назад

Meanwhile, far out in the icy darkness, @NewHorizons2015 speeds on outward. It is now 42.8AU from the Sun and 70 million km from the Kuiper Belt object (486958 ) 2014 MU69 "Ultima Thule", which it will fly past on Jan 1


20 ч. назад

New Horizons will spend about 3 hours within the ~ 79000 km-radius gravitational Hill sphere of the object and then head out to even deeper space

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