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The Magellanic Catalogue of Stars is a catalogue of positions for 243,561 stars covering large areas around the Large and Small Magellanic Cloud (LMC and SMC). The catalogue was compiled by H.-J. Tucholke, K.S. de Boer and W.C. Seitter, who measured the positions on ESO Schmidt plates taken in 1988/91 and refer to the FK5 system via the PPM Star Catalogue.
WISEA — AllWISE Source Catalog; WISEP — Wide-field Infrared Survey Explorer Preliminary Release Source Catalog; WNC / Winn — Winnecke Catalogue of Double Stars; WNO — Washington Observations (double stars) (U.S. Naval Observatory, Washington D.C.) Wo — Woolley Nearby Star Catalogue; Wolf — Catalogue of High Proper Motion Stars
The SMC was detected with an X-ray luminosity of 5 × 10 38 erg/s in the range 1.5–12 keV, and 2.5 × 10 39 erg/s in the range 5–50 keV for an apparently extended source. [31] The fourth Uhuru catalog lists an early X-ray source within the constellation Tucana: 4U 0115-73 (3U 0115-73, 2A 0116-737, SMC X-1). [32]
The United States Space Surveillance Network (SSN) detects, tracks, catalogs and identifies artificial objects orbiting Earth, e.g. active/inactive satellites, spent rocket bodies, or fragmentation debris. The system is the responsibility of United States Space Command and operated by the United States Space Force and its functions are:
SMC's head office is located in Sotokanda, Chiyoda-ku, Tokyo, Japan. The company has a global engineering network, with technical facilities in the United States, Europe, and China, as well as Japan. Key production facilities are located in China and Singapore, and local production facilities are in United States, Mexico, Brazil, Europe, India ...
NGC 121 is the only old globular cluster in the SMC that is similar to Galactic clusters in the Milky Way. [4] Age estimates for this cluster range from 10.5 to 11.8 billion years old, which is 2-3 billion years younger than the oldest such comparable clusters in the Milky Way. [ 5 ]
AB8, also known as SMC WR8, is a binary star in the Small Magellanic Cloud (SMC). A Wolf-Rayet star and a main sequence companion of spectral type O orbit in a period of 16.638 days. It is one of only nine known WO stars, the only Wolf-Rayet star in the SMC not on the nitrogen sequence, and the only Wolf-Rayet star in the SMC outside the main bar.
These stars have a theoretical maximum luminosity and, at the distance of the SMC, HV 2112 was typically calculated to be slightly more luminous than this limit at around 60,000 L ☉. [4] More modern calculations gave higher values for the luminosity of HV 2112 above 100,000 L ☉, which is unambiguously too luminous to be an AGB star. These ...