AAVSO: Observed Minima Timings of Eclipsing Binaries

Observed times of minima of an eclipsing binary provide essential data for obtaining the period of the system. Precise period calculations are crucial for uncovering the physics that drive these systems and for understanding the evolution of stellar systems.

The AAVSO has a publication Series containing times of minima of eclipsing binaries in the AAVSO's eclipsing binary observing program. Each AAVSO "Observed Minima Timings of Eclipsing Binaries" is a compilation of hundreds of minima timings for 50 eclipsing binaries in this program. It represents a portion of the stars observed by participants in this program since 1976 and continues the listing of minima published in previous Numbers of the series. Except where otherwise specified, all minima are determined from visual observations reduced by the authors using a computerized tracing paper method. All Numbers of the series have been prepared by Marvin Baldwin, Chair of the AAVSO Eclipsing Binary Committee, and Gerard Samolyk, Committee member.

There have been eleven Eclipsing Binary monographs, titled "Observed Minima Timings of Eclipsing Binaries" (Numbered 1-11), published by the AAVSO to date. The printed version of each Monograph contains:

an Introduction;
tables giving:
- publications containing previous AAVSO times of minima on each star in the Number,
- information on the O-C minima and linear elements used in the Number, and
- contributing observers; and
for each star, a compilation of times of minima and an O-C diagram based on the times of minima and the linear elements given in the Number.

Print copies of each Number are available through our online store. The cost for AAVSO members is $5 and $15 for non-members.

An ASCII version of each Number may be downloaded free of charge from the AAVSO website. Please note that the ASCII version contains all the material in the printed version except for the O-C diagram.

The data included in the Observed Minima Timings of Eclipsing Binaries, Number 1-10 may also be searched online from The Published Times of Minimum Database.

Observed Minima Timings of Eclipsing Binaries, Number 1

Number1.hlp - Description/help file
Number1.lis - List of stars in Observed Minima Timings Number 1
Number1.asc - Introduction, tables, and data

Observed Minima Timings of Eclipsing Binaries, Number 2

Number2.hlp - Description/help file
Number2.lis - List of stars in Observed Minima Timings Number 2
Number2.asc - Introduction, tables, and data

Observed Minima Timings of Eclipsing Binaries, Number 3

Number3.hlp - Description/help file
Number3.lis - List of stars in Observed Minima Timings Number 3
Number3.asc - Introduction, tables, and data

Observed Minima Timings of Eclipsing Binaries, Number 4

Number4.hlp - Description/help file
Number4.lis - List of stars in Observed Minima Timings Number 4
Number4.asc - Introduction, tables, and data

Observed Minima Timings of Eclipsing Binaries, Number 5

Number5.hlp - Description/help file
Number5.lis - List of stars in Observed Minima Timings Number 5
Number5.asc - Introduction, tables, and data

Observed Minima Timings of Eclipsing Binaries, Number 6

Number6.hlp - Description/help file
Number6.lis - List of stars in Observed Minima Timings Number 6
Number6.asc - Introduction, tables, and data

Observed Minima Timings of Eclipsing Binaries, Number 7

Number7.hlp - Description/help file
Number7.lis - List of stars in Observed Minima Timings Number 7
Number7.asc - Introduction, tables, and data
Number7.doc

Observed Minima Timings of Eclipsing Binaries, Number 8

Number8.hlp - Description/help file
Number8.lis - List of stars in Observed Minima Timings Number 8
Number8.asc - Introduction, tables, and data
Number8.doc

Observed Minima Timings of Eclipsing Binaries, Number 9

Number9.hlp - Description/help file
Number9.lis - List of stars in Observed Minima Timings Number 9
Number9.asc - Introduction, tables, and data
Number9.doc

Observed Minima Timings of Eclipsing Binaries, Number 10

Number10.hlp - Description/help file
Number10.lis - List of stars in Observed Minima Timings Number 10
Number10.asc - Introduction, tables, and data
Number10.doc

Observed Minima Timings of Eclipsing Binaries, Number 11

Number11.hlp - Description/help file
Number11.lis - List of stars in Observed Minima Timings Number 11
Number11.asc - Introduction, tables, and data
Number11.doc

Observed Minima Timings of Eclipsing Binaries, Number 12

Number12.hlp - Description/help file
Number12.lis - List of stars in Observed Minima Timings Number 11
Number12.asc - Introduction, tables, and data
Number12.doc

search engine | site map | links | contact us