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Details: added pvt sector involvement

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{{Infobox rocket launch
| name = PSLV-C51
| image = File:PSLV C51 at first launch pad.jpg
| alt =
| caption = [[PSLV]]-DL C51 at [[Satish Dhawan Space Centre Second Launch Pad|First]] launch pad
| rocket = PSLV-DL
| launch = {{Start date|2021|02|28|df=yes}}, 03:54:00 UTC
| operator = | [[National Institute for Space Research|INPE]] [[Pixxel]]
| pad = [[Satish Dhawan Space Centre|Sriharikota]] [[Satish Dhawan Space Centre Second Launch Pad|First]]
| payload = {{flagicon|Brazil}} [[Amazônia-1]] {{flagicon|India}} Satish Dhawan Sat<ref>{{Cite web|title=PSLV-C51 is scheduled to launch Amazonia-1 and 18 Co-passenger saitellites on February 28, 2021 from Satish Dhawan Space Centre SHAR |url=https://www.isro.gov.in/launcher/pslv-c51-scheduled-to-launch-amazonia-1-and-20-co-passenger-satellites-february-28-2021|website=ISRO|language=en|date=5 February 2021}}</ref> {{flagicon|India}} JITsat {{flagicon|India}} GHRCEsat {{flagicon|India}} Sri Shakthi Sat {{flagicon|USA}} SpaceBEE (×12)<ref name="INPE_20210222">{{cite web |title=Amazonia 1 - Evolução da Campanha de Lançamento |url=http://www.inpe.br/noticias/noticia.php?Cod_Noticia=5695 |access-date=22 February 2021}}</ref> {{flagicon|Mexico}} SAI-I - Nanoconnect-2 {{flagicon|India}} SindhuNetra
| outcome =
| succession = [[List of PSLV launches|PSLV launches]]
| previous = [[PSLV-C50]]
| next = [[PSLV-C52]]
}}

The '''PSLV-C51<ref name="skyrocket.de">{{cite web|url=https://space.skyrocket.de/doc_lau/pslv.htm|title=PSLV|website=Space.skyrocket.de|accessdate=21 January 2021}}</ref>''' is the 53rd mission of the Indian [[Polar Satellite Launch Vehicle]] (PSLV) program. The Polar Satellite Launch Vehicle (PSLV)-C51 was launched at 04:54 (UTC) / 10:24 (IST) on 28 February 2021 with the main payload from [[Brazil]], [[National Institute for Space Research|INPE]]'s [[Amazônia-1]]<ref>{{cite web |url=http://www.inpe.br/noticias/noticia.php?Cod_Noticia=5358|title=Satélite Amazônia-1 começa a ser fechado para a realização de testes ambientais|website=inpe.br|language=pt-br|access-date=23 February 2020}}</ref><ref>{{cite web|title=Satélite de monitoramento da Amazônia deverá ser lançado em fevereiro|url=https://www.gov.br/pt-br/noticias/educacao-e-pesquisa/2020/07/satelite-de-monitoramento-da-amazonia-devera-ser-lancado-em-fevereiro|publisher=Governo do Brasil|language=pt-br|access-date=26 July 2020}}</ref> and 18 other ride-sharing small satellites.<ref>{{Cite web|title=Satélite Amazônia 1, primeiro totalmente feito no Brasil, é lançado ao espaço|url=https://g1.globo.com/sp/vale-do-paraiba-regiao/noticia/2021/02/28/satelite-amazonia-1-primeiro-totalmente-feito-no-brasil-e-lancado-ao-espaco.ghtml|access-date=2021-02-28|website=G1|language=pt-br}}</ref><ref name="C51_PK"/><ref>{{Cite web|title=Lançamento do satélite Amazonia 1 adiado para o dia 28 de fevereiro|url=http://www.inpe.br/noticias/noticia.php?Cod_Noticia=5652|access-date=2021-01-14|website=www.inpe.br|language=pt-br}}</ref><ref name=":6">{{Cite web|date=2020-12-17|title=Next PSLV launch to carry 3 satellites made by Indian start-ups|url=https://www.hindustantimes.com/india-news/next-pslv-launch-to-carry-3-satellites-made-by-indian-start-ups/story-EFd5k8XIht3jjgXJy2qM8O.html|access-date=2020-12-18|website=Hindustan Times|language=en}}</ref>
This is the first dedicated commercial launch executed by [[New Space India Limited|NSIL]].<ref>{{cite web|url=https://www.business-standard.com/article/current-affairs/2021-to-be-year-of-chandrayaan-3-says-fm-allocates-rs-4000-cr-for-oceans-121020100693_1.html|title= 2021 to be year of Chandrayaan-3, says FM, allocates Rs 4,000 cr for oceans |publisher=Business Standard|date=1 February 2021}}</ref>

==Details==
The PSLV-C51 was launched from the [[Satish Dhawan Space Centre Second Launch Pad|First Launch Pad]] of the [[Satish Dhawan Space Centre]] in Sriharikota, Andhra Pradesh,India. The PSLV C51 rocket carried primary payload, [[Amazônia-1]] and 18 secondary payloads<ref name="C51_PK">{{cite web |title=PSLV C51 presskit |url=https://www.isro.gov.in/sites/default/files/pslv-c51_amazonia_1_brochure.pdf |access-date=23 February 2021 |archive-url=https://web.archive.org/web/20210223111030/https://www.isro.gov.in/sites/default/files/pslv-c51_amazonia_1_brochure.pdf |archive-date=23 February 2021}}</ref> like SDSat and three UnitySats<ref>{{cite news |title=Brazilian, Indian startup satellite in ISRO's first mission in 2021 |url=https://economictimes.indiatimes.com/tech/tech-bytes/ibrazilian-indian-startup-satellite-in-isros-first-mission-in-2021/articleshow/80706248.cms |access-date=6 February 2021}}</ref>(JITsat, GHRCEsat, Sri Shakthi Sat) etc.

It was the third flight of PSLV-DL,<ref name="skyrocket.de"/> having 2 strap-on boosters and placed the payloads in [[sun-synchronous orbit]]s.<ref>{{cite web|url=https://www.businessinsider.in/science/space/news/isro-to-kick-off-2021-by-launching-its-first-indian-start-up-passenger-into-space-abroad-the-pslv-c51/articleshow/79780410.cms|title=ISRO to kick off 2021 by launching its first Indian start-up passenger into space aboard the PSLV-C51 |publisher=Business Insider|date=17 December 2020}}</ref>

Private sector company [[Ananth Technologies]] worked with ISRO on the PSLV-C51 mission. The company conducted stage integration and checkout on the mission, marking the first time that ISRO had contracted a private sector company to undertake the task.<ref>{{cite web |title=PSLV launch brings cheer to aerospace firm |url=https://www.thehindu.com/news/national/kerala/pslv-launch-brings-cheer-to-aerospace-firm/article33957208.ece |website=The Hindu |access-date=4 November 2021 |language=en-IN |date=1 March 2021}}</ref><ref>{{cite web |title=Hyderabad-based firm helped in ISRO satellite launch |url=https://www.newindianexpress.com/cities/hyderabad/2021/mar/02/hyderabad-based-firm-helped-in-isro-satellite-launch-2270788.html |website=The New Indian Express |access-date=4 November 2021}}</ref>

==Launch schedule==
The launch was originally scheduled for 22 February 2021, but was delayed to 28 February owing to delays in assembly of the rocket.<ref>{{Cite web|last=|first=|date=14 January 2021|title=Lançamento do satélite Amazonia 1 adiado para o dia 28 de fevereiro|url=https://www.inpe.br/noticias/noticia.php?Cod_Noticia=5652|url-status=live|archive-url=https://web.archive.org/web/20210127215221/http://www.inpe.br/noticias/noticia.php?Cod_Noticia=5652|archive-date=27 January 2021|access-date=5 February 2021|website=}}</ref>

==Mission overview==
* '''Propellant''':
**''Stage 1:'' [[Solid-fuel rocket|Composite Solid]]
** ''Stage 2:'' [[Liquid fuel rocket|Earth Storable Liquid]]
** ''Stage 3:'' [[Solid-fuel rocket|Composite Solid]]
** ''Stage 4:'' [[Liquid fuel rocket|Earth Storable Liquid]]
* '''Altitude''': {{convert|752|km|mi|0}}



The PSLV C51 rocket has four stages; each one was self-contained, with its own [[Spacecraft propulsion|propulsion system]], thereby capable of functioning independently. The first and third stages used composite solid propellants, while the second and fourth stage use earth-storable liquid propellant.

==References==
{{reflist|33em}}

==External links==
{{Portal|Spaceflight}}
{{commons category|PSLV-C51}}

{{PSLV}}

[[Category:Polar Satellite Launch Vehicle]]
[[Category:Spacecraft launched by India in 2021]]
[[Category:February 2021 events in India]]
[[Category:Rocket launches in 2021]]

PSLV-C51 - Revision history

->EcoWizard: /* Details */ added pvt sector involvement