Erotisk Spica - Alpha Virginis Bilder
With an apparent magnitude of 0. Shilole Tanzania absolute magnitude is Spica has a spectral type of B1V, Spicab surface temperature of 22,° Kelvin and a luminosity 12, times the Sun. It has a mass of The image above shows the uncropped view of Spica North is up through the German Swinger Club E Astrograph. A method of finding Spica is Spicab follow the arc of the handle of the Big Dipper to Arcturusand then continue on the same angular distance to Spica.
This can be recalled by the mnemonic phrase, "follow the arc to Arcturus and speed on to Spicab. Spica is a close binary star whose components Spicab about each other every four days. They remain sufficiently close together that they can not be resolved as individual stars through a telescope. The orbital parameters for this system were first inferred using spectroscopic measurements. The luminosity class matches the spectrum of a star that is midway between a subgiant and a giant star, and it is no longer a B-type main sequence star.
The total luminosity of this star is about 12, times that of the Sun, and eight times the luminosity of its companion. The Spciab is one of the nearest stars to the Sun that has sufficient mass to end its Spicab in a Type II supernova explosion. The primary is classified as a Beta Cephei type variable star that varies in brightness over a 0. The spectrum shows a radial velocity variation with the Spicxb period, indicating Spicab the surface of the star is Spicab pulsating outward and then contracting.
The secondary star of this Spicab is one of the few stars to display the Struve-Sahade Effect. This an anomalous change in the strength of the spectral lines over the course of an Spjcab, where the Spicab become weaker as the star is moving away from Spicab observer.
It may be caused by a strong stellar wind from the primary scattering the light from secondary when it is receding. This star is smaller than the primary, with about 7 times the mass of Spocab Sun and 3.
Its stellar Spiab is B2 V, making this a main sequence star. Spica is a rotating ellipsoidal variable, which is a non-eclipsing close binary star system where the stars are mutually distorted through their gravitational interaction.
This effect Spicab the apparent magnitude of the star system to vary by 0. This slight dip in magnitude is barely noticeable visually. The rotation rates of both stars are faster than their mutual orbital period. This lack of synchronization and the high ellipticity of their orbit may indicate that this a young star system.
Over time, the mutual tidal interaction of the pair may lead to rotational synchronization and orbit circularization. The description above is based on the Spica entry in Wikipedia. All photographs, text and web pages Spicab © Copyright - by Fred Espenak, unless otherwise noted.
All rights reserved. They may not be reproduced, published, copied or transmitted in any form, including electronically on the Internet, without written permission of the author. All images are digitally watermarked. All Rights Reserved. See: Image Licensing. Last Updated: Jan
With an apparent magnitude of 0. Its absolute magnitude is
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