Author Topic: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011  (Read 420195 times)

Offline snowhole

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #140 on: 11/08/2011 02:38 AM »
I'm sorry if this has already been discussed, but I'm still quite confused of the name of the launch vehicle. From the photos, it writes 'Zenit-2FG' on the rocket, so that must be it? However on the Roscosmos website they call it 'Zenit-2SB', as does the title of this thread. And somewhere I've read that the rocket is a 'Zenit-3F'. So what is it that caused this confusion of names?

Offline pargoo

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #141 on: 11/08/2011 04:06 AM »
     Does the international cooperation involved - okay, it's mostly China, but you know what I mean - mean real/hi-res launch pics, or just the usual postage-stamps?

Offline woods170

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #142 on: 11/08/2011 06:11 AM »
     Does the international cooperation involved - okay, it's mostly China, but you know what I mean - mean real/hi-res launch pics, or just the usual postage-stamps?
The latter. No hi-res out of the official channels such as Roscosmos and the likes is to be expected.
If ESA or NASA had been involved this might have been different. Oh well.. Maybe one of the Russian forum members will be out there with a camera. Maybe...

Offline Jason1701

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #143 on: 11/08/2011 06:15 AM »
     Does the international cooperation involved - okay, it's mostly China, but you know what I mean - mean real/hi-res launch pics, or just the usual postage-stamps?
The latter. No hi-res out of the official channels such as Roscosmos and the likes is to be expected.
If ESA or NASA had been involved this might have been different. Oh well.. Maybe one of the Russian forum members will be out there with a camera. Maybe...

Strange. Their rollout videos are always amazing.

Offline anik

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #144 on: 11/08/2011 06:26 AM »
I'm still quite confused of the name of the launch vehicle

Zenit-2SB41.1 two-stage rocket plus Fobos-Grunt satellite equals Zenit-2FG (or Zenit-2SLB, but not Zenit-3F) rocket.

Offline snowhole

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #145 on: 11/08/2011 06:38 AM »
I'm still quite confused of the name of the launch vehicle

Zenit-2SB41.1 two-stage rocket plus Fobos-Grunt satellite equals Zenit-2FG (or Zenit-2SLB, but not Zenit-3F) rocket.
Cheers for the clarification!

Offline pargoo

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #146 on: 11/08/2011 07:53 AM »
     The latter. No hi-res out of the official channels such as Roscosmos and the likes is to be expected.
    If ESA or NASA had been involved this might have been different. Oh well.. Maybe one of the Russian forum members will be out there with a camera. Maybe...

    That sucks majorly!!!!  This is a mouth-watering mission.  Personally, I doubt they'll succeed, but having said that I don't want to jinx them.  Color close-ups of Phobos...yum-mee!

Offline Liss

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #147 on: 11/08/2011 08:11 AM »
I'm still quite confused of the name of the launch vehicle

Zenit-2SB41.1 two-stage rocket plus Fobos-Grunt satellite equals Zenit-2FG (or Zenit-2SLB, but not Zenit-3F) rocket.
Cheers for the clarification!
The idea is that '3' requires some third stage in addition to basic Zenit-2SB type vehicle. In the case of Fobos-Grunt, there is no third stage per documentation, even if Fobos-Grunt ADU propulsion unit is a clone of Fregat.
This message reflects my personal opinion based on open sources of information.

Offline Chandonn

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #148 on: 11/08/2011 11:52 AM »
... Personally, I doubt they'll succeed, but having said that I don't want to jinx them...

I'll be happy if the Martians don't shoot this one down too, as they have so many in the past decades...   ;)

Offline cd-slam

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #149 on: 11/08/2011 11:52 AM »
Dear people who spell Fobos-Grunt as Phobos-Grunt. YOU are the worst! Leave it as Fobos-Grunt or translate it into Phobos-Soil, Phobos-Ground, Phobos-Dirt, .......

And if saying the name out loud, please pronounce 'u' in "Grunt" as the "oo" in "moon": it sounds so much better and is more faithful to the Russian pronunciation.
For those who don't know Russian, the Latin pronunciation will suffice. ;)
I agree. The English meaning has a much better "Home Improvement" connotation. Go Fobos-Grunt! :D

Offline Satori

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #150 on: 11/08/2011 12:54 PM »
At http://phobos.cosmos.ru/index.php?id=618&L=2 it is said that "After 2.5 hours flight (1.7 revolutions) at this based orbit the main propulsion system will be switch on to transfer the spacecraft into the elliptical orbit (250 km x 4150...4170 km), period 2,2 hours. After 2.1 hours (1 revolutions) 2-nd engine burn will transfer the spacecraft into an interplanetary Earth-Mars trajectory." But on http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=49084 is said that "At launch, the spacecraft will be inserted into a 200-km circular orbit around Earth with an inclination of 51.8 degrees. After four hours of flight (2.8 revolutions) in this orbit, the propulsion system will be switched on to transfer the spacecraft into an elliptical orbit (230 x 11100 km, period 3.65 hours) from where it is transferred onto a trajectory to Mars."

Can someone explain which one is correct?

Offline Cbased

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #151 on: 11/08/2011 01:02 PM »
User "Vovan" from NK forum started very interesting commentary:
http://www.novosti-kosmonavtiki.ru/phpBB2/viewtopic.php?t=10631&postdays=0&postorder=asc&start=2385

in 2 words: Everything is OK, on schedule.
Waiting for a Government comission decision at 6pm local (Baikonur) time

Online Space Pete

What's the launch time in GMT? Thanks.
Electronic Engineer by day, NASASpaceflight's ISS Editor by night | Read my NASASpaceflight articles here

Offline ugordan

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #153 on: 11/08/2011 01:15 PM »
Isn't it 20:16 GMT?

Online Space Pete

Isn't it 20:16 GMT?

Yup - just found 3:16 PM EST on another site - which I make to be 8:16 PM GMT.

Cool, that means I can watch it. :)
Electronic Engineer by day, NASASpaceflight's ISS Editor by night | Read my NASASpaceflight articles here

Offline Juggernaut

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #155 on: 11/08/2011 01:53 PM »
Hello,

please, do you know if there is a website with broadcast "live" of the launch? if yes can you post the link?

thanks a lot in advance!

Cheers

Offline Hidestar

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Offline Satori

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #157 on: 11/08/2011 02:27 PM »
Isn't it 20:16 GMT?

Yup - just found 3:16 PM EST on another site - which I make to be 8:16 PM GMT.

Cool, that means I can watch it. :)

Plan of Russian Launches thread http://forum.nasaspaceflight.com/index.php?topic=26990.15
« Last Edit: 11/08/2011 02:30 PM by Chris Bergin »

Offline Stan Black

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #158 on: 11/08/2011 03:19 PM »
I'm still quite confused of the name of the launch vehicle

Zenit-2SB41.1 two-stage rocket plus Fobos-Grunt satellite equals Zenit-2FG (or Zenit-2SLB, but not Zenit-3F) rocket.
Cheers for the clarification!
The idea is that '3' requires some third stage in addition to basic Zenit-2SB type vehicle. In the case of Fobos-Grunt, there is no third stage per documentation, even if Fobos-Grunt ADU propulsion unit is a clone of Fregat.

 So what is unique about this rocket that makes it a Zenit-2SB41?

Offline JimO

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Re: LIVE: Zenit-2SB launch with Phobos-Grunt - November 8, 2011
« Reply #159 on: 11/08/2011 03:46 PM »
Observers are still being recruited to watch the two Fregat burns. Not all of them are on Earth. More to come.

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