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Default Intelsat 23 on Proton-M /Breeze-M, October 14, 2012
by Notebook 10-12-2012, 11:38 AM

Уважаемые господа!

Пуск РКН Протон-M - Бриз-М с КА «Интелсат-23» планируется провести с космодрома Байконур 14.10.2012 в 8 час. 37 мин. 0 сек. UTC (14.10.2012 12 час. 37 мин. 0 сек. московского времени).
Начало трансляции за 30 минут до старта.
Трансляция в реальном масштабе времени будет проходить по адресу:
без пароля.
Видеорепортаж с Байконура не будет проводиться по техническим причинам.

Владельцы портативных устройств PDA могут следить в тестовом режиме за запуском на
http://www.space-center.ru - новая версия.

Наилучшие пожелания,
[email protected] </SPAN>

Dear Sirs!

The Proton-M - Breeze-M launch vehicle with the «Intelsat-23» satellite on board is scheduled to be launched from Baikonur Cosmodrome on 14.10.2012 at 8 h 37 m 0 s UTC (14.10.2012 12 h 37 m 0 s Moscow Local Time).
Real time broadcast of the launch will be available from 30 minutes before start on the Khrunichev Space Center web site:
without password.
The videoreporting from Baikonur will not be conducted for technical reasons.

Owners of PDA can watch the launch in test mode on
http://www.space-center.ru - new vertion.

Best regards,
[email protected]

Last edited by Galactic Penguin SST; 10-12-2012 at 07:32 PM. Reason: Added launch date for ease of reading
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Old 10-12-2012, 07:21 PM   #3
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Intelsat Blog:
Orbital Sciences:
ILS: Intelsat 23 Mission Control

A high resolution view of the satellite from Orbital Sciences:

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Old 10-13-2012, 03:55 PM   #4
Galactic Penguin SST
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Engineers at Baikonur and other various places will be anxious to see the Proton takes flight tomorrow and deploys the fifth Intelsat communication satellite taking flight in 2012 perfectly. After all, with 3 serious mishaps in 18 launch campaigns for the past 20 months (ironically all hitting hard on satellites either built for or built by Russia), the Proton rocket and its developer Khrunichev is in one of the largest crisis for a long time of space launch operations. The successful launch of Intelsat 23 directly into geostationary orbit is thus vital to re-gain confidence from different customers to use the veteran Proton rocket again.

The Intelsat 23 mission will be the 8th Proton launch of 2012 and the 380th Proton flight overall.

This will be the sixth commercial mission of the year for ILS and the 75th ILS Proton mission since the Proton April 1996 first commercial flight.

This will also be the 11th Intelsat satellite launched with Proton. In addition, Intelsat 23 will become the 5th Orbital Science Corporation-built satellite launched on Proton, as well as the 4th direct-geostationary orbit insertion mission on an ILS Proton.

The launch was postponed from August 23 due to the failure of the Breeze-M upper stage on the last Proton launch with two Russian-built satellites on August 6. The failure was eventually traced to a a small metallic orifice inside a fuel line that was not manufactured according to specifications (by a manufacturer that got the job only a year ago), causing the pressurization system of the upper stage to leak, eventually shutting down the engine.

Launch location:

Baikonur Launch pad no. 81/24 46°4'15.38"N, 62°59'5.11"E

Launch dates and times:

Launch times
Time Zone
Baikonur / UTC+6
Luxembourg / CEDT
Universal / UTC
Washington / EDT
Los Angeles / PDT
Launch time (Primary):
Oct. 14, 2012
Oct. 14, 2012
Oct. 14, 2012
Oct. 14, 2012
Oct. 14, 2012
*Click here to restart the timer* Intelsat 23 Launch

Live Coverage Of The Launch:


Intelsat 23 communication satellite:

Mission Summary

Orbital is building the Intelsat-23 (IS-23) GEO communications satellite for Intelsat, LLC. IS-23 will generate 4.8 kilowatts of electrical payload power and carry 15 active Ku-band and 24 active C-Band transponders. The spacecraft will provide communications services for the Americas, Caribbean, Western Europe, Africa and selected islands of the Pacific and Atlantic oceans. Designed for a useful life of at least 15 years, the IS-23 satellite will be located in orbit at 307 degrees East Longitude following its launch in late 2012. The IS-23 is the 10th Orbital-built geosynchronous communications satellite in the Intelsat fleet.

Working Orbit:
Orbital Location:
53° West
North/Central/South America, West Europe/Africa
ApA at separation:
37180 km
PeA at separation:
37180 km
Inc at separation:

Intelsat 23
  • Intelsat
Prime contractor:
  • Orbital Sciences Corporation
  • Orbital Star-2.4E
Mass at Separation:
  • 2681 kg
Dry Mass:
  • ?
  • 3 axis stabilized
Dimensions (stowed):
  • 5.16 x 3.02 x 2.50 m
  • ?
  • 24 C-band transponders
  • 15 Ku-band transponders
Life time:
  • 15 years
Ku-band coverage:
C-band coverage:

Launch Vehicle:

Proton-M / Briz-M
Prime contractor:
  • Khrunichev Space Centre
GRAU Index:
  • 8K82KM
58.2 m with upper stage and payload fairing
max 7.4 m
Liftoff mass:
705 metric tonnes
Payload mass:
~22 tonnes at LEO
1st stage:
  • 6 X RD-275 engines
  • Empty 30.6 tonnes
  • Propellants 419.41 tonnes (UDMH and NTO)
  • Thrust in vacuum 1069.8 tonnes of force
  • Thrust at sea level 971.4 tonnes of force
2nd stage:
  • 1 X RD-0211 engine 3 X RD-0210 engines
  • Empty 11.4 tonnes
  • Propellants 156.113 tonnes (UDMH and NTO)
  • Thrust in vacuum 237.4 tonnes of force
3rd stage:
  • 1 X RD-0213 engine & 1 X RD-0214 vernier engine
  • Empty 3.7 tonnes
  • Propellants 46.562 tonnes (UDMH and NTO)
  • Thrust in vacuum 59.36 (core) + 3.15 (vernier) tonnes of force
Upper Stage:
  • GRAU Index: 14S43
  • Common Name: Briz-M
  • Designer & Manufacturer: Khrunichev Space Centre
  • Dimensions: Length 2.654 m, Diameter 4 m
  • Empty Mass 2.2 tonnes
  • Propellants 6 660 kg UDMH + 13 260 kg N2O4
  • Flight time: no less than 24 hours
  • Main Engine: 1 X 14D30
  • Thrust in vacuum 2.0 tonnes of force
  • ISP 328.6 s
  • Main engine restarts: up to 8 times
  • Precision Manoeuvering Engines: 4 X 11D458
  • Thrust in vacuum 400 N each
  • ISP 252 s
  • RCS Engines: 12 X 17D58E
  • Thrust in vacuum 13.3 N each
  • ISP 274 s
Payload Fairing:
  • Diameter 4.35 m
  • Length 11.6 m

The vehicle's reliability statistics according to http://www.spacelaunchreport.com/log2012.html#rate:

Vehicle     Successes/Tries Realzd Pred  Consc. Last     Dates    
                             Rate  Rate* Succes Fail    
Proton-M/Briz-M  53    58    .91  .90      0    08/06/12 2001-

Intelsat 23 Ascent Profile

The Proton-M first three stages place the orbital unit (OU), which consists of a Breeze-M upper stage, adapter system and SES-5, into a 51.5° inclination suborbital trajectory.

Proton-M powered flight lasts 582 seconds. The OU powered flight begins at the moment of the third stage separation.

Immediately after the separation of the third stage booster, the Breeze-M stability engines start, damping the angular velocities of the third stage separation and then providing orbital unit orientation and stability during coast flight along a suborbital trajectory to await the first burn. The upper stage follows a four-burn injection profile.

Intelsat 23 Ascent Timeline

EventTime rel lift-offTime UTCComment
Ignition Start Sequence-00:00:02.508:36:57.5 
Stage 1 Ignition (40% thrust)-00:00:01.7508:36:58.25 
Command Stage 1 (100% thrust)-00:00:00.908:36:59.1 
Maximum Dynamic Pressure00:01:0208:38:02 
1st/2nd Stage Separation00:02:0008:39:00 
2nd/3rd Stage Separation00:05:2708:42:27 
Payload Fairing Separation00:05:4208:42:42 
3rd Stage/Breeze M Separation00:09:4108:46:41 
1st Burn Ignition00:11:1508:48:15 
1st Burn Shutdown00:15:0508:52:051st Burn's Duration 00:03:50
2nd Burn Ignition01:08:2109:45:21 
2nd Burn Shutdown01:27:1010:04:102nd Burn's Duration 00:18:49
3rd Burn Ignition03:26:5612:03:56 
3rd Burn Shutdown03:45:1212:22:123rd Burn's Duration 00:18:16
APT Jettison03:46:3312:23:33 
4th Burn Ignition09:03:5917:40:59 
4th Burn Shutdown09:15:4517:52:454th Burn's Duration 00:11:46
Spacecraft Separation09:30:0018:07:00 

Weather forecast for Baikonur, Kazakhstan on October 14, 2012 (2 p.m.)

Overcast. High of 21C. Winds from the North at 5 to 15 km/h shifting to the WNW in the afternoon.

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Old 10-14-2012, 07:59 AM   #5
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Video is on air.
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Old 10-14-2012, 08:27 AM   #6
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T-10 min
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Old 10-14-2012, 08:31 AM   #8
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Damn: direct insertion into GEO = enough fuel for the satellite to use for 27 years!
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Old 10-14-2012, 08:39 AM   #9
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Liftoff ! Wow, very low clouds !

---------- Post added at 08:39 AM ---------- Previous post was at 08:37 AM ----------

1/2 separation OK
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Old 10-14-2012, 08:56 AM   #10
Galactic Penguin SST
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The three Proton stages has completed their jobs, but of course the interesting part has just started.... (especially with two 18 minute super-long burns.... )
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Old 10-14-2012, 11:03 AM   #11
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Spaceflight Now :

0855 GMT (4:55 a.m. EDT)

T+plus 18 minutes. The first burn of the Breeze M upper stage has ended successfully, placing the rocket and the payload in a parking orbit. Preflight plans called for the Breeze M to now be in a 112-mile-high orbit.

The next ignition of the Breeze M is scheduled for approximately 0945 GMT (5:45 a.m. EDT) for a burn lasting 18 minutes, 49 seconds.
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Old 10-14-2012, 12:51 PM   #13
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8 minutes ago, ILS via twitter:
Breeze M MECO 3 and APT Jettison confirmed! #IS23 MECO 4 scheduled to occur in about 5 hours, then shortly followed by SC separation.
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Old 10-14-2012, 05:03 PM   #14
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Seems pretty good. Let's keep our fingers crossed !

---------- Post added at 05:03 PM ---------- Previous post was at 02:37 PM ----------

More updates :

1255 GMT (8:55 a.m. EDT)

International Launch Services confirms the completion of the Breeze M's third burn and a successful jettison of the stage's auxiliary propellant tank.

The Breeze M and Intelsat 23 should now be in a transfer orbit with a low point of 308 miles, a high point of 23,079 miles, and an inclination of 46.2 degrees.

The upper stage will coast for 5 hours before igniting a fourth and final time to inject Intelsat 23 into a circular orbit more than 23,000 miles above Earth.

Separation of the Intelsat 23 satellite is scheduled for 1807 GMT (2:07 p.m. EDT).

1040 GMT (6:40 a.m. EDT)

The second burn of the Breeze M upper stage has been accomplished as planned. This firing was supposed to place the rocket in an initial transfer orbit with a low point of 197 miles, a high point of 3,106 miles, and an inclination of 48.6 degrees.

The next event is the Breeze M's third burn, which is programmed to last 18 minutes, 16 seconds, beginning at 1203 GMT (8:03 a.m. EDT). After the burn, the Breeze M will jettison an auxiliary propellant tank.
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