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TOPIC: Algol


L

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RE: Algol
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Minimum of Beta Perseus variable star, 21:18 UT, 4th August, 2010.

Magnitude=3.4mag 
Max=2.1mag 
Period= 2.9days  
RA= 3h08.2m  Dec=+40°57'

Eclipse begins at about 16:28 and ends at 2:06 UT

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L

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Minimum of Beta Perseus variable star, 00:30 UT, 2nd August, 2010.

Magnitude=3.4mag  
Max=2.1mag  
Period= 2.9days   
RA= 3h08.2m  Dec=+40°57'

Eclipse begins at about 19:40 and ends at  5:18 UT

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L

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Minimum of Beta Perseus variable star at 22:50 UT, 12th July, 2010.

Magnitude=3.4mag
Max=2.1mag
Period= 2.9days
RA= 3h08.2m Dec=+40°57'

Eclipse begins at about 17:59m and ends at 3:37 UT

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L

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Minimum of Beta Perseus variable star at 2.00 UT, 10th July, 2010.

Magnitude=3.4mag
Max=2.1mag
Period= 2.9days
RA= 3h08.2m Dec=+40°57'

Eclipse begins at about 21:10 and ends at 6:48 UT

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L

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Minimum of Beta Perseus variable star at 0.3h

Magnitude=3.4mag  
Max=2.1mag  
Period= 2.9days   
RA= 3h08.2m  Dec=+40°57'

Eclipse begins at about 19:29 and ends at  5:07 UT

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L

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Minimum of Beta Perseus variable star at 1.8h, 28th May 2010

Magnitude=3.4mag  
Max=2.1mag 
Period= 2.9days  
RA= 3h08.2m  Dec=+40°57'

Eclipse begins at about 20:58 and ends at  6:36 UT

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L

Posts: 129914
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Title: The Algol triple system spatially resolved at optical wavelengths
Authors: R. T. Zavala (1), C. A. Hummel (2), D. A. Boboltz (3), R. Ojha (3), D. B. Shaffer (4), C. Tycner (5), M. T. Richards (6), D. J. Hutter (1) ((1) U.S. Naval Observatory, Flagstaff Station, (2) ESO, (3) U.S. Naval Observatory, Washington, D.C., (4) Lowell Observatory, (5) Central Michigan University, (6) The Pennsylvania State University)

Interacting binaries typically have separations in the milli-arcsecond regime and hence it has been challenging to resolve them at any wavelength. However, recent advances in optical interferometry have improved our ability to discern the components in these systems and have now enabled the direct determination of physical parameters. We used the Navy Prototype Optical Interferometer to produce for the first time images resolving all three components in the well-known Algol triple system. Specifically, we have separated the tertiary component from the binary and simultaneously resolved the eclipsing binary pair, which represents the nearest and brightest eclipsing binary in the sky. We present revised orbital elements for the triple system, and we have rectified the 180-degree ambiguity in the position angle of Algol C. Our directly determined magnitude differences and masses for this triple star system are consistent with earlier light curve modelling results.

Read more (111kb, PDF)

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L

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Minimum of Beta Persei variable star at 18.8h

Eclipse begins at about 14:02 and ends at 23:40 UT

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L

Posts: 129914
Date:
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Minimum of Beta Persei Variable Star at  22:00 UT

Magnitude=3.4mag  
Max=2.1mag  
Period= 2.9days   
RA= 3h08.2m  Dec=+40°57'

Eclipse begins at about 17:12 and ends at  2:50 UT

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L

Posts: 129914
Date:
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Minimum of the variable star Beta Persei at 23.4h
Magnitude=3.4mag 
Max=2.1mag 
Period= 2.9days  
RA= 3h08.2m  Dec=+40°57'

Eclipse begins at about 18:37 and ends at  4:15 UT

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