Celestial
Mechanics and Dynamical Astronomy
FIGURE I - 2-yr IMPACT FACTOR EVOLUTION
Source: ISI Journal Citation Reports 1997-2011

The impact
factor in a year N is the number of citations in that year of papers
published in the years N-1 and N-2, divided by the total number of
papers published by the journal in those 2 years. The mean impact
factor of "Celestial Mechanics and Dynamical Astronomy" in the past 3
years was 1.663 with the maximum1.811 reached in 2009.
FIGURE II - IMPACT FACTORS IF-2 to IF-5
Source: ISI Journal Citation Reports 1997-2011
The impact
factors
IF-X in a year N are given by the number
of citations in that year of
papers
published in the years N-1 to N-X, divided by the total number of
papers published by the journal in those X years. The IF-5 is the new
5-yr impact factor introduced since 2007 by the ISI. It was computed
for the years prior to 2007 with the data taken
from the ISI Journal Citation Reports since 2001. The mean impact
factor IF-5 in the past triennium was 1.397 with the maximum 1.515
reached in 2010.
.
Half-Life:
The
impact factor does not take into account the lifetime of the papers
published in the journal. The half-life of the papers published in
"Celestial Mechanics and Dynamical Astronomy" i s > 10.0 years. In
Astronomy, there are only ~10 journals
(out of ~50) with half-life > 10.0 years.
.
In
the JCR 2011, Celestial Mechanics and Dynamical Astronomy appears in
two comparative journal summary lists. In the list MATHEMATICS,
INTERDISCIPLINARY APPLICATIONS it appears in rank 21 (out of 92
journals).
In the list ASTRONOMY & ASTROPHYSICS it appears in rank 30 (out of 56 journals)..