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A multiple star system consists of two or more stars that appear from Earth to be close to one another in the sky. [dubious – discuss] This may result from the stars actually being physically close and gravitationally bound to each other, in which case it is a physical multiple star, or this closeness may be merely apparent, in which case it is an optical multiple star [a] Physical multiple ...
This star system belongs to the Zeta Herculis Moving Group of stars that share a common motion through space, suggesting that they have a common origin. In the galactic coordinate system , the [U, V, W] components of the space velocity for this system are equal to [−70.2, −47.4, +16.4] km/s for ζ 1 and [−69.7, −46.4, +16.8] km/s for ζ ...
In 1921, Joel Stebbins announced that observations from 1917 through 1921 had shown that the star is an eclipsing binary. [14] AR Cassiopeiae A is an Algol-type eclipsing binary with an orbital period of about 6.07 days. [4] Its primary is a B-type main-sequence star, and the secondary an A-type main-sequence star. The secondary star may be an ...
Star system ← → ← → Median distance Stars in system Spectral type Apparent magnitude (V) Comments and references Spica (Alpha Virginis) 250 ± 10: 2: B1III-IV + B2V +0.97: One of the closest core-collapse supernova candidates to Earth. Bellatrix (Gamma Orionis) 250 ± 10: 1: B2 III: 1.64
This is a list of star systems within 300–350 light years of Earth. [1] [2] [3] This list is incomplete; you can help by adding missing items. (July 2024)
ζ Cancri (Latinised to Zeta Cancri) is the system's Bayer designation; ζ 1 Cancri and ζ 2 Cancri those of its two constituents. The designations of the two constituents as ζ Cancri AB and C, and those of their components—ζ Cancri A, B, Ca, Cb, Cb1 and Cb2—derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the ...
EBLM J0555-57 is a triple star system approximately 670 light-years from Earth. The system's discovery was released on July 12, 2017. EBLM J0555-57Ab, the smallest star in the system, orbits its primary star with a period of 7.8 days, and currently is the smallest known star with a mass sufficient to enable the fusion of hydrogen in its core.
The STAR-2 Bus is a fully redundant, flight-proven, spacecraft bus designed for geosynchronous missions.. It is a satellite platform, designed and developed by Thomas van der Heyden for the Indonesian Cakrawarta satellite program in the early 1990s, now manufactured by Northrop Grumman Innovation Systems with an apogee kick motor to place a communications satellite into geostationary orbit, a ...