Eta Microscopii, Latinised asη Microscopii, is a solitary[7]star in theconstellationMicroscopium. It is visible to the naked eye as a dim, orange-hued star with anapparent visual magnitude of 5.53.[2] The star is located around 910 light-years distant from the Sun based onparallax, and is drifting further away with aradial velocity of +22 km/s.[1]
Multiple star catalogues list twooptical companions.[8] Twoarc-minutes away, the 8th magnitude HD 200733 is amain sequence star much closer to Earth than η Microscopii.[9] A 14th-magnitude star one arc-minute from η Microscopii is a background object.[10]
^abcdDrilling, J. S. (February 1973), "Photoelectric UBV photometry of late-type stars in two regions at high galactic latitude",Astronomical Journal,78:44–46,Bibcode:1973AJ.....78...44D,doi:10.1086/111370.
^abHouk, Nancy (1978),Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan,Bibcode:1978mcts.book.....H.
^abcAnders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18",Astronomy and Astrophysics,628: A94,arXiv:1904.11302,Bibcode:2019A&A...628A..94A,doi:10.1051/0004-6361/201935765,S2CID131780028.
^Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001), "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog",The Astronomical Journal,122 (6): 3466,Bibcode:2001AJ....122.3466M,doi:10.1086/323920.
