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Heweliusz (satellite)
Heweliusz is the second Polish scientific satellite launched in 2014 as part of the Bright-star Target Explorer (BRITE) programme. The spacecraft was launched aboard a Chang Zheng 4B rocket in August 2014. Heweliusz is an optical astronomy spacecraft operated by the Space Research Centre of the Polish Academy of Sciences; it is one of two Polish contributions to the BRITE constellation along with the Lem satellite. It is named after Johannes Hevelius.
==Features==
Heweliusz is the third Polish satellite (after PW-Sat and Lem) ever launched. Along with Lem, TUGSAT-1, UniBRITE-1 and BRITE-Toronto, it is one from a constellation of six nanosatellites of the BRIght-star Target Explorer project, operated by a consortium of universities from Canada, Austria and Poland.
Heweliusz was developed and manufactured by the Space Research Centre of the Polish Academy of Sciences between 2010 and 2012, based around the Generic Nanosatellite Bus, and had a mass at launch of (plus another 7 kg for the XPOD separation system). The satellite is used, along with four other operating spacecraft,, to conduct photometric observations of stars with an apparent magnitude of greater than 4.0 as seen from Earth. Heweliusz was one of two Polish BRITE satellites launched, along with the Lem spacecraft. Four more satellites—two Austrian and two Canadian—were launched at different dates.
Heweliusz will observe the stars in the red color range whereas Lem will do it in blue. Due to the multicolour option, geometrical and thermal effects in the analysis of the observed phenomena are separated. Both of the much larger satellites, such as MOST and CoRoT, do not have this colour option; this will be crucial in the diagnosis of the internal structure of stars. Heweliusz will photometrically measure low-level oscillations and temperature variations in stars brighter than visual magnitude (4.0), with unprecedented precision and temporal coverage not achievable through terrestrial based methods.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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