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Spektr-RG russian X-ray space telescope P1110968.jpg
Mission typeX-ray astronomy[1]
Operator Russia, Russian Space Research Institute
 Germany, German Aerospace Center
Mission duration6.5 years[1]
Spacecraft properties
Manufacturer Russia, NPO Lavochkin
 Germany, Max Planck Institute for Extraterrestrial Physics
Launch mass6,000 kg [1]
Dry mass2,115 kg
Payload mass1,100 kg [1]
Start of mission
Launch dateJune 2019[3][4][1]
Launch siteBaikonur 45/1
Orbital parameters
Reference systemL2 point
Main telescope
TypeeROSITA: Wolter

Spektr-RG (Russian for Spectrum + Röntgen + Gamma; also called Spectrum-X-Gamma, SRG, SXG) is a Russian/German high-energy astrophysics space observatory planned to launch in June 2019. It will follow on from the Spektr-R satellite telescope launched in 2011.


The primary instrument of the mission is eROSITA, built by the Max Planck Institute for Extraterrestrial Physics (MPE) in Germany. It is designed to be used to conduct a 4-year X-ray survey, the first in a medium X-ray band up to 10 keV energies. This survey should detect many new clusters of galaxies and active galactic nuclei. The second instrument, ART-XC, is a Russian high-energy X-ray telescope. This instrument and spacecraft are being built under the leadership of the Russian Space Research Institute (IKI).


The Spektr-RG programme was revived in 2005,[clarification needed][5] by 2016 construction was finished, and by mid-2018 it was under integration and testing. It is scheduled to be launched in June 2019.[4][1] The observatory is being integrated to a "Navigator" satellite bus.[6]


Instruments on the Spektr-RG observatory
Organisation Max Planck Institute for Extraterrestrial Physics IKI / VNIIEF
Telescope type Wolter Wolter
Mass 810 kg 350 kg
Sensitivity range 0.3 - 10 keVolts 6 - 30 keVolts
View angle 1 degree 30 minutes
Angular resolution 15 seconds 45 seconds
Sensor area 2,400 cm2/ 1 keVolts 450 cm2/ 8 keVolts

See also[edit]


  1. ^ a b c d e f g Zak, Anatoly (16 April 2016). "Spektr-RG to expand horizons of X-ray astronomy". Russian Space Web. Retrieved 16 September 2016.
  2. ^ Gunter Dirk Krebs. "Spektr-RG (SXG)". Retrieved 4 February 2011.
  3. ^ https://www.gazeta.ru/science/2019/01/17_a_12131893.shtml
  4. ^ a b [1]. Anatoly Zak Russian Space Web. 18 September 2018.
  5. ^ "Spectrum-RG/eRosita/Lobster mission definition document". Russian Space Research Institute. 30 October 2005. Retrieved 4 February 2011.
  6. ^ Navigator satellite bus. Anatoly Zak, Russian Space Web.

External links[edit]