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    a.k.a. mikusingularity

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  1. (Hatsunese Space Program/HASDA - Phase 3 - 17) 1986-01-06 - Watarimono-2 Uranus flyby 1986-04-06* - Houki flyby of Halley's Comet (edited image) (*Halley's orbit in Real Expansion is slightly inaccurate, the probe should have arrived in March)
  2. Phase 3 - 17 1986-01-06 - Watarimono-2 made its closest approach to Uranus (after having entered its sphere of influence on 1985-11-26), beating Voyager 2 by a few weeks even though this probe launched 2 years later. Uranus rotates on an axis tilted 97.8 degrees from its orbital plane, meaning that while the planet rotates every 17 hours, only one side of the planet faces the Sun for half of its 84-year orbital period. This also suggested that the planet was impacted by a large planetoid a long time ago. The featureless atmosphere was observed to have methane in addition to hydrogen and helium, and water, ammonia, and methane ices deeper within. Uranus had its own magnetic field and faint ring system. After the Uranus encounter, Watarimono-2 would continue onward to arrive at Neptune and its moon Triton in August 1989. 1986-04-06* - Houki encountered Halley's Comet, first observing the long tail of ionized gas and dust being blown away by the solar wind and photons, then passing as close as 540 km from the comet's rocky and icy nucleus. Targeting of the nucleus, which is surrounded by a fuzzy cloud known as the coma, was achieved by the Soviet Vega probes, which flew about 10000 km away. Data was shared with HASDA in an example of scientific cooperation between Cold War rivals. Houki was equipped with a Whipple shield to protect the spacecraft from dust as it flew by the nucleus at 65 km/s. The spacecraft was still struck by particles that sent it into a spin; some instruments were damaged, but the probe mostly survived. The European Giotto spacecraft would accomplish the same feat several days later. [*Halley's Comet from the Real Expansion mod has a slightly inaccurate orbit, and the probe should have arrived on a day like 1986-03-09. This image has also been edited to add the coma.]
  3. (Hatsunese Space Program/HASDA - Phase 3 - 16) 1985-11-18 - Mokume Io flyby
  4. Phase 3 - 16 1985-08-18 - As Mokume was visiting Callisto, an M-1B rocket was preparing to launch the "Houki" (PLANET-K) probe to Halley's Comet, which had a highly elliptical orbit that came into the inner Solar System once every 76 years. Major space agencies around the world took advantage of this rare opportunity by sending an armada of probes to the comet. Houki was named for the broom (帚)-like shape of comets as perceived in China and Hatsunia, but was also phonetically the same as the characters meaning "treasured device" (宝器). It would arrive at Halley's Comet in the spring of 1986. (note: Halley's Comet is from the Real Expansion mod. The orbit is inaccurate by one month, so the probe should arrive in March, not April.) 1985-09-04 - Saki-06 launched with Tomohiro Sasaki, Erika Ichihara, and Asao Nakamatsu to spend 14 days in a 339 km orbit, matching the duration record of the US Gemini program, except with more room for astronauts to eat, sleep, and do research on the effects of living in space. 1985-11-18 - Mokume flew by Io, the innermost of Jupiter's Galilean moons. Due to tidal heating and flexing from Jupiter and its other moons, Io's surface is filled with constant volcanic activity, and a coating of sulfur and sulfur dioxide. Io's orbit was located at the same distance as an intense toroidal radiation belt around Jupiter, so there was a risk of the electronics being damaged, but Mokume's orbit crossed it in such a way as to pass over, go through the hole, and under the toroidal region as it met Io. Mokume would continue to orbit around Jupiter, with the occasional encounter with one of its moons.
  5. (Hatsunese Space Program/HASDA - Phase 3 - 15) 1985-01-09 - Mokume Ganymede (Jupiter) flyby 1985-03-02 - Stargazer space telescope 1985-06-11 - Mokume Europa (Jupiter) flyby 1985-08-18 - Mokume Callisto (Jupiter) flyby
  6. Phase 3 - 15 1985-01-09 - Mokume flew by Ganymede, the largest moon of Jupiter and the Solar System (and third Galilean moon by distance from Jupiter), being bigger than the planet Mercury. The surface was composed of darker, older cratered regions and lighter, relatively younger regions of grooves and ridges. It was the only moon that had its own magnetic field, inferring that it had an active iron core. A gravitational assist slowed the spacecraft, reducing its orbital period around Jupiter from approximately 6 months to 2.5 months. [in our universe, Japan just launched its first spacecraft to interplanetary space] 1985-03-02 - Stargazer, Hatsunia's large optical space telescope, was lifted to a 539 km orbit by an M-2-24 rocket. It has been theorized to be similar to technology used on the classified IGS-A reconnaissance satellite series, but aimed up at the sky and used for civilian astronomical purposes instead. The 3-meter diameter mirror, free from atmospheric disturbances, provided stunning views of planets, stars, nebulae, and distant galaxies, and helped gain insight into the 13.7-billion-year age and expansion of the universe. 1985-06-11 - After a second (and more distant) flyby of Ganymede on 1985-03-29, Mokume flew past Europa, the smallest of the four Galilean moons (and second Galilean moon by distance). The icy surface was smooth and covered in many cracks but few craters, indicating that tidal forces from Jupiter and its other major moons were actively reshaping Europa's surface and heating up the interior to form a subsurface ocean, leading to speculation about whether life could exist there similarly to life near hydrothermal vents on Earth's ocean floor. Similar oceans have also been thought to exist inside Ganymede and Callisto. 1985-08-18 - Mokume flew by Callisto, the farthest Galilean moon from Jupiter (and second largest). Its surface is composed of a mixture of rock and ice, heavily bombarded with craters that have mostly remained unchanged over its 4-billion-year history, as it is too far away to be affected by tidal heating. This time, the gravitational assist sped up and raised the spacecraft's orbit around Jupiter. It would encounter the remaining Galilean moon, Io, in a few months.
  7. Why is it that I can't optimize for "Departure Delta-V Only" (not Departure + Arrival) in the "Compute Departure Burn/Enter Transfer & Initial Orbit Information" window even though I had enabled it in the options beforehand? edit: I think I have to restart the program for it to work.
  8. In this case, they were disposed of, but maybe later they could be reused to form a space station. It would just have narrow docking ports (like Russian space stations), so you wouldn't have something like the US/European/Japanese side of the ISS in our universe, with wide berthing ports, so any experiment or equipment racks would have to be smaller (interchangeable) or pre-installed (non-interchangeable). Also, as more modules are added to the station, it becomes more crucial for resupply ships to carry any waste/garbage away (this was a big problem with the Russian Mir station and Soyuz/Progress, but a Saki-derived uncrewed resupply ship could have more room). In fact, there's a concept image for the Fuji spacecraft that shows a station made out of Expansion Modules in the upper left corner. I don't know if I will make a station as big as that (due to frame rate issues), but there are plans to have a Saki-derived space station over the next decade.
  9. 1983 - Akatsuki-3 Venus orbiter/lander 1984 - Saki-05 crewed spacecraft - standard system configuration
  10. [HASDA] 1984-10-19 - Saki-05 in the "standard system" configuration (video)
  11. Phase 3 - 14 1984-10-19 - Saki-05 launched on an M-2-24 rocket, with Hitomi Kuriyama, Momoka Oda, and Mitsuharu Haneda. This was the first use of the "standard system" configuration, which added a disposable Expansion Module and Propulsion Module to the relatively cramped Core Module, and had a total mass of approximately 11 tonnes. The Expansion Module added more living space (which didn't need to be protected for re-entry, thus saving mass) as well as a toilet, and enough food, water, and oxygen for crews to last a few weeks in space. The Propulsion Module was designed for almost 400 m/s of maneuvers in Low Earth Orbit, powered by a 13.9 kN hypergolic engine. The Core and Propulsion Modules launched on top of the Expansion Module, to reduce the mass of the emergency launch escape system. Once in orbit, the Core and Propulsion Modules detached, rotated, and docked with the Expansion Module, similarly to the transposition, docking, and extraction sequence of the Apollo missions. Afterwards, Saki-05 demonstrated its propulsive capabilities by raising its orbit from 200 km to 310 km, waiting two days, then going to an apogee of over 480 km. The mission would ultimately last 7 days before de-orbit, separation, re-entry, and splashdown of the Core Module. The Soviet space program noticed that the 11-tonne Saki standard system was larger and offered more living space than their 7-tonne Soyuz. Development of the Buran spaceplane and Energia super-heavy booster were thus accelerated to match the capabilities of the US Space Shuttle program.
  12. I'd rather have no separate parties involved for now. Also, I still have to fill in the gap between how HASDA is in the 1980s and how it is today.
  13. Actually, I'm not really sure about that. I'm worried about other people misrepresenting this (semi-serious) worldbuilding project. Some people see "a Miku-themed Japan-like country" and think it's nothing else but a joke or a meme, but I wanted it to be more than that.
  14. (HASDA) 1984-07-16 - Mokume performs Jupiter orbit insertion
  15. Phase 3 - 13 1984-07-16 - Mokume arrived at Jupiter, performing a 600 m/s orbital insertion burn 138000 km away, and readying itself for long-term observations of the planet's atmosphere (the ammonia cloud tops resembling a wood grain), magnetic field, and many moons. The initial orbit was highly eccentric and approximately six months long. A inclination change maneuver would be performed at the highest point of said orbit (on 1984-10-14) to set up a rendezvous with Ganymede, the largest moon in the Solar System, on 1985-01-09. A gravitational assist from Ganymede would slow down the spacecraft relative to Jupiter, halving the orbital period to about 3 months. HASDA having a clear and undisputed first in planetary exploration pressured NASA to split the Galileo mission in two, launching an orbiter (shrunk down from the original plans) and an atmospheric entry probe in February and March of 1984, respectively.
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