Author Topic: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010  (Read 271837 times)

Offline russianhalo117

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everyone is now showing happy spirits

Offline russianhalo117

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AOS was successful

Offline TheFallen

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It appears that Akatsuki's orbit insertion burn was a success! WELCOME TO VENUS!

Offline savuporo

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Incredibly long journey, congrats on the arrival !
Orion - the first and only manned not-too-deep-space craft

Offline Star One

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How will this lengthy time to get into orbit have impacted useful in orbit mission time?
« Last Edit: 12/07/2015 06:48 am by Star One »

Offline bolun

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Result of Attitude Control Engine Thrust Operation for Venus Orbit Insertion (VOI-R1)

December 7, 2015 (JST)

The Japan Aerospace Exploration Agency (JAXA) performed the attitude control engine thrust operation of the Venus Climate Orbiter “AKATSUKI” for its Venus orbit insertion from 8:51 a.m. on December 7 (Japan Standard Time).

As a result of analyzing data transmitted from the orbiter, we confirmed that the thrust emission of the attitude control engine was conducted for about 20 minutes as scheduled.

The orbiter is now in good health. We are currently measuring and calculating its orbit after the operation. It will take a few days to estimate the orbit, thus we will announce the operation result once it is determined.

http://global.jaxa.jp/press/2015/12/20151207_akatsuki.html

Offline Fuji

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VOI burn Start : December 6, 23:51:29 (UTC)
VOI burn End : December 7, 00:11:57 (UTC)
Burn duration was 1228 sec.

Offline Fuji

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How will this lengthy time to get into orbit have impacted useful in orbit mission time?

Observation will be start next April. Two years observation mission will be planned.
Jan. to March will be test observation phase.


On December 1, test observation was already start.  1,100,000 km from the Venus.
http://www.jaxa.jp/projects/sat/planet_c/topics_j.html#topics6430

Offline Star One

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How will this lengthy time to get into orbit have impacted useful in orbit mission time?

Observation will be start next April. Two years observation mission will be planned.
Jan. to March will be test observation phase.


On December 1, test observation was already start.  1,100,000 km from the Venus.
http://www.jaxa.jp/projects/sat/planet_c/topics_j.html#topics6430

Thanks. How much is that mission lifetime reduced compared to if it had got into orbit in 2010?

Offline yoichi

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http://jda.jaxa.jp/category_p.php?lang=e&page=&category1=256&category2=306&category3=308&page_pics=50

Venus image shot by AKATSUKI after its attitude control engine thrust ejection
IR1 / LIR / UVI

Online Galactic Penguin SST

JAXA has confirmed that this little orbiter is in Venus orbit:

December 9, 2015 (JST)

Venus Climate Orbiter “AKATSUKI” Inserted Into Venus' Orbit

The Japan Aerospace Exploration Agency (JAXA) successfully inserted the Venus Climate Orbiter “AKATSUKI” into the orbit circling around Venus.
As a result of measuring and calculating the AKATSUKI’s orbit after its thrust ejection, the orbiter is now flying on the elliptical orbit at the apoapsis altitude of about 400 km and periapsis altitude of about 440,000 km from Venus. The orbit period
is 13 days and 14 hours. We also found that the orbiter is flying in the same direction as that of Venus’s rotation.

The AKATSUKI is in good health.

We will deploy the three scientific mission instruments namely the 2μm camera (IR2), the Lightning and Airglow Camera (LAC) and the Ultra-Stable oscillator (USO) and check their functions. JAXA will then perform initial observations with the above three instruments along with the three other instruments whose function has already been confirmed, the Ultraviolet Imager (UVI), the Longwave IR camera (LIR), and the 1μm camera (IR1) for about three months. At the same time, JAXA will also gradually adjust the orbit for shifting its elliptical orbit to the period of about nine days. The regular operation is scheduled to start in April, 2016.

Pericytherion - ~400 km
Apocytherion - ~440000 km
Inclination - ~3 deg. (equatorial)
Orbit Period - 13 days 14 hours (Earth time)
« Last Edit: 12/09/2015 11:42 am by jacqmans »
Astronomy & spaceflight geek penguin. In a relationship w/ Space Shuttle Discovery. Current Priority: Chasing the Chinese Spaceflight Wonder Egg & A Certain Chinese Mars Rover

Offline yoichi

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https://twitter.com/kitamitsunari/status/674583807664623617
@Akatsuki_JAXA , the 1st Venus Climate Orbiter, is now on the orbit! Dr.Nakamura shows letter"V", ..

https://twitter.com/kitamitsunari/status/674584603886129152
Dr, Imamura for "C" and Ms. Hirose, a.k.a. "orbital mam", signs letter "O" !
Conglatulations to @Akatsuki_JAXA
« Last Edit: 12/09/2015 12:47 pm by yoichi »

Offline Fuji

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Thanks. How much is that mission lifetime reduced compared to if it had got into orbit in 2010?

Mission lifetime is not changed in 2010.
But, design life is 4.5 years, already run over  :o

Online eeergo

Delta-v was greater than anticipated, and it is hypothesized that it could be due to a smaller closest approach distance. They are assessing how, if at all, they will need to tune the orbit to make sure the aged batteries won't suffer too much in prolonged eclipse conditions.

Fuel consumption was as expected. I suppose the larger delta-v is actually a good thing - even if they need to change the pericynthion, they can probably trade that for a reduced apocynthion with less fuel expenditure.

http://www.planetary.org/blogs/guest-blogs/2015/1208-live-from-sagamihara.html
-DaviD-

Offline MattMason

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"Dawn is in orbit!"

"Can't wait to see the pictures from Ceres!"

"What? It's in orbit around Venus."

"Huh? How the heck did it get over there? Did Venus get demoted to a dwarf planet, too?"


(Name humor...Congrats JAXA! Winner of the "Never Let the Japanese Sun set" award. Rising, always rising.)
"Why is the logo on the side of a rocket so important?"
"So you can find the pieces." -Jim, the Steely Eyed

Offline russianhalo117

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"Dawn is in orbit!"

"Can't wait to see the pictures from Ceres!"

"What? It's in orbit around Venus."

"Huh? How the heck did it get over there? Did Venus get demoted to a dwarf planet, too?"


(Name humor...Congrats JAXA! Winner of the "Never Let the Japanese Sun set" award. Rising, always rising.)
i hope your kidding because these are to different SC.

Offline MattMason

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"Dawn is in orbit!"

"Can't wait to see the pictures from Ceres!"

"What? It's in orbit around Venus."

"Huh? How the heck did it get over there? Did Venus get demoted to a dwarf planet, too?"


(Name humor...Congrats JAXA! Winner of the "Never Let the Japanese Sun set" award. Rising, always rising.)
i hope your kidding because these are to different SC.

"Akatsuki" means "Dawn" in Japanese. :) There are two Dawn spacecraft in operations now.
"Why is the logo on the side of a rocket so important?"
"So you can find the pieces." -Jim, the Steely Eyed

Offline Phil Stooke

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Not to forget Zarya (which can be translated as Dawn), now part of ISS but briefly an independent spacecraft and still functioning.

Offline kato

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And there's also Intelsat 28 "New Dawn" in GEO since 2011.

Offline Fuji

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