From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Operator Avanti Communications[1]
SATCAT no. 43272
Mission duration 15 years[1]
Spacecraft properties
Bus Star-3 Bus
Manufacturer Orbital ATK[2]
Launch mass 4,000 kg
Start of mission
Launch date 5 April 2018, 21:34 UTC[2]
Rocket Ariane 5 flight VA242[2]
Launch site ELA-3, Guiana Space Centre[2]
Contractor Arianespace[1]
Orbital parameters
Eccentricity circular[3]
Periapsis 35,786 km[3]
Apoapsis 35,786 km[3]
Period 23h 56min[4]
Band Ka-band[1]
Capacity up to 28 GHz[1]

HYLAS-4 is a telecommunications satellite owned and operated by Avanti Communications and manufactured by Orbital ATK (now Northrop Grumman Innovation Systems) that was launched by an Ariane 5 rocket on 5 April 2018.[2]


The satellite is built to provide high speed data transmission services to Africa, Latin America and Europe.[5] It is based on Orbital ATK's Star-3 Bus, delivering 64 28 GHz fixed beams covering Africa and parts of Europe. There are also four independent steerable beams that can serve Africa, South America and Europe[6]. The capacity will partially be used to allow Avanti to expand into new markets and provide growth for existing markets.[1]


The satellite was launched into geosynchronous orbit by Arianespace on an Ariane 5 rocket in its ECA variant from ELA-3 at Guiana Space Centre in French Guiana. The launch was originally planned in early 2017 but has been delayed to 21 March 2018, and then to 5 April 2018.[1][2]. The satellite reached its geostationary orbital position by 19 April 2018 [7].


  1. ^ a b c d e f g "HYLAS 4". space.skyrocket.de. Retrieved 2018-03-03.
  2. ^ a b c d e f "Ariane 5 (VA242) • DSN-1 & Hylas 4". spaceflight101.com. Retrieved 2018-03-03.
  3. ^ a b c "What Is a Geosynchronous Orbit?". Space.com. Retrieved 2018-03-03.
  4. ^ "Sidereal Day | COSMOS". astronomy.swin.edu.au. Retrieved 2018-03-03.
  5. ^ "Hylas 4 satellite to be launched by Arianespace - Arianespace". Arianespace. Retrieved 2018-03-03.
  6. ^ "Avanti Communications - Satellite Fleet - HYLAS 4". Avanti Communications. Retrieved 2018-10-25.
  7. ^ https://investor.avantiplc.com/news/hylas-4-reaches-geo-orbit/
Retrieved from "https://en.wikipedia.org/w/index.php?title=HYLAS-4&oldid=865667382"
This content was retrieved from Wikipedia : http://en.wikipedia.org/wiki/HYLAS-4
This page is based on the copyrighted Wikipedia article "HYLAS-4"; it is used under the Creative Commons Attribution-ShareAlike 3.0 Unported License (CC-BY-SA). You may redistribute it, verbatim or modified, providing that you comply with the terms of the CC-BY-SA