Scimago Journal & Country Rank

Astrophysical Journal Letters

Country United Kingdom  - SIR icon SIR Ranking of United Kingdom
H Index
Subject Area and CategoryEarth and Planetary Sciences
Space and Planetary Science

Physics and Astronomy
Astronomy and Astrophysics
PublisherInstitute of Physics Publishing
Publication typeJournals
ISSN20418213, 20418205
Scope The Astrophysical Journal Letters is the premier journal for rapid publication of high-impact astronomical research. ApJL publishes brief reports on the most influential developments across astronomy and astrophysics. The journal specializes in articles that are timely, containing new discoveries and results that have a significant immediate impact on other researchers. Articles published in ApJL are self-contained, including context that is generally understandable by scientists who are not specialists in the particular fields.


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The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.

Astronomy and Astrophysics1999Q1
Astronomy and Astrophysics2000Q1
Astronomy and Astrophysics2001Q1
Astronomy and Astrophysics2002Q1
Astronomy and Astrophysics2003Q1
Astronomy and Astrophysics2004Q1
Astronomy and Astrophysics2005Q1
Astronomy and Astrophysics2006Q1
Astronomy and Astrophysics2007Q1
Astronomy and Astrophysics2008Q1
Astronomy and Astrophysics2009Q1
Astronomy and Astrophysics2010Q4
Astronomy and Astrophysics2011Q1
Astronomy and Astrophysics2012Q1
Astronomy and Astrophysics2013Q1
Astronomy and Astrophysics2014Q1
Astronomy and Astrophysics2015Q1
Astronomy and Astrophysics2016Q1
Astronomy and Astrophysics2017Q1
Astronomy and Astrophysics2018Q1
Space and Planetary Science1999Q1
Space and Planetary Science2000Q1
Space and Planetary Science2001Q1
Space and Planetary Science2002Q1
Space and Planetary Science2003Q1
Space and Planetary Science2004Q1
Space and Planetary Science2005Q1
Space and Planetary Science2006Q1
Space and Planetary Science2007Q1
Space and Planetary Science2008Q1
Space and Planetary Science2009Q1
Space and Planetary Science2010Q4
Space and Planetary Science2011Q1
Space and Planetary Science2012Q1
Space and Planetary Science2013Q1
Space and Planetary Science2014Q1
Space and Planetary Science2015Q1
Space and Planetary Science2016Q1
Space and Planetary Science2017Q1
Space and Planetary Science2018Q1

The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

Citations per document

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per documentYearValue
Cites / Doc. (4 years)19998.624
Cites / Doc. (4 years)200010.683
Cites / Doc. (4 years)20019.809
Cites / Doc. (4 years)200211.809
Cites / Doc. (4 years)200311.171
Cites / Doc. (4 years)20047.660
Cites / Doc. (4 years)200510.819
Cites / Doc. (4 years)200612.634
Cites / Doc. (4 years)200712.753
Cites / Doc. (4 years)200810.012
Cites / Doc. (4 years)20095.284
Cites / Doc. (4 years)20104.091
Cites / Doc. (4 years)20116.553
Cites / Doc. (4 years)20126.754
Cites / Doc. (4 years)20136.124
Cites / Doc. (4 years)20145.680
Cites / Doc. (4 years)20155.438
Cites / Doc. (4 years)20165.348
Cites / Doc. (4 years)20175.497
Cites / Doc. (4 years)20186.239
Cites / Doc. (3 years)19998.624
Cites / Doc. (3 years)20009.244
Cites / Doc. (3 years)200110.248
Cites / Doc. (3 years)200212.680
Cites / Doc. (3 years)20036.527
Cites / Doc. (3 years)20046.606
Cites / Doc. (3 years)200513.569
Cites / Doc. (3 years)200616.089
Cites / Doc. (3 years)200711.869
Cites / Doc. (3 years)20085.375
Cites / Doc. (3 years)20094.093
Cites / Doc. (3 years)20103.333
Cites / Doc. (3 years)20116.553
Cites / Doc. (3 years)20126.762
Cites / Doc. (3 years)20136.124
Cites / Doc. (3 years)20145.796
Cites / Doc. (3 years)20155.637
Cites / Doc. (3 years)20165.574
Cites / Doc. (3 years)20175.833
Cites / Doc. (3 years)20186.975
Cites / Doc. (2 years)19996.505
Cites / Doc. (2 years)20009.849
Cites / Doc. (2 years)200112.277
Cites / Doc. (2 years)20027.149
Cites / Doc. (2 years)20035.121
Cites / Doc. (2 years)20046.205
Cites / Doc. (2 years)200523.800
Cites / Doc. (2 years)200615.070
Cites / Doc. (2 years)20075.944
Cites / Doc. (2 years)20084.341
Cites / Doc. (2 years)20091.000
Cites / Doc. (2 years)20103.333
Cites / Doc. (2 years)20116.568
Cites / Doc. (2 years)20126.761
Cites / Doc. (2 years)20136.019
Cites / Doc. (2 years)20145.943
Cites / Doc. (2 years)20155.722
Cites / Doc. (2 years)20165.661
Cites / Doc. (2 years)20176.382
Cites / Doc. (2 years)20187.698
Total Cites 

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

Self Cites19997
Self Cites200010
Self Cites20013
Self Cites20026
Self Cites20031
Self Cites20041
Self Cites20051
Self Cites20060
Self Cites20070
Self Cites20080
Self Cites20090
Self Cites20101
Self Cites2011471
Self Cites2012690
Self Cites2013838
Self Cites2014852
Self Cites2015702
Self Cites2016722
Self Cites2017819
Self Cites20181103
Total Cites1999940
Total Cites20001174
Total Cites20011445
Total Cites20021230
Total Cites2003607
Total Cites2004469
Total Cites2005692
Total Cites2006901
Total Cites2007997
Total Cites2008387
Total Cites2009176
Total Cites201010
Total Cites20114987
Total Cites201210218
Total Cites201313344
Total Cites201412021
Total Cites201511223
Total Cites201610820
Total Cites201710884
Total Cites201812158
External Cites per Doc 
Cites per Doc

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

External Cites per document19998.560
External Cites per document20009.165
External Cites per document200110.227
External Cites per document200212.619
External Cites per document20036.516
External Cites per document20046.592
External Cites per document200513.549
External Cites per document200616.089
External Cites per document200711.869
External Cites per document20085.375
External Cites per document20094.093
External Cites per document20103.000
External Cites per document20115.934
External Cites per document20126.306
External Cites per document20135.739
External Cites per document20145.385
External Cites per document20155.284
External Cites per document20165.202
External Cites per document20175.394
External Cites per document20186.343
Cites per document19998.624
Cites per document20009.244
Cites per document200110.248
Cites per document200212.680
Cites per document20036.527
Cites per document20046.606
Cites per document200513.569
Cites per document200616.089
Cites per document200711.869
Cites per document20085.375
Cites per document20094.093
Cites per document20103.333
Cites per document20116.553
Cites per document20126.762
Cites per document20136.124
Cites per document20145.796
Cites per document20155.637
Cites per document20165.574
Cites per document20175.833
Cites per document20186.975
% International Collaboration

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

YearInternational Collaboration
Citable documents 
Non-citable documents

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

Non-citable documents199918
Non-citable documents200014
Non-citable documents200116
Non-citable documents200213
Non-citable documents200313
Non-citable documents200413
Non-citable documents200511
Non-citable documents20067
Non-citable documents20073
Non-citable documents20081
Non-citable documents20090
Non-citable documents20100
Non-citable documents20115
Non-citable documents201214
Non-citable documents201326
Non-citable documents201434
Non-citable documents201536
Non-citable documents201630
Non-citable documents201726
Non-citable documents201825
Citable documents1999109
Citable documents2000127
Citable documents2001141
Citable documents200297
Citable documents200393
Citable documents200471
Citable documents200551
Citable documents200656
Citable documents200784
Citable documents200872
Citable documents200943
Citable documents20103
Citable documents2011761
Citable documents20121511
Citable documents20132179
Citable documents20142074
Citable documents20151991
Citable documents20161941
Citable documents20171866
Citable documents20181743
Cited documents 
Uncited documents

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

Uncited documents199957
Uncited documents200065
Uncited documents200181
Uncited documents200275
Uncited documents200381
Uncited documents200466
Uncited documents200556
Uncited documents200656
Uncited documents200742
Uncited documents200836
Uncited documents20097
Uncited documents20101
Uncited documents201159
Uncited documents2012107
Uncited documents2013185
Uncited documents2014200
Uncited documents2015221
Uncited documents2016226
Uncited documents2017190
Uncited documents2018178
Cited documents199970
Cited documents200076
Cited documents200176
Cited documents200235
Cited documents200325
Cited documents200418
Cited documents20056
Cited documents20067
Cited documents200745
Cited documents200837
Cited documents200936
Cited documents20102
Cited documents2011707
Cited documents20121418
Cited documents20132020
Cited documents20141908
Cited documents20151806
Cited documents20161745
Cited documents20171702
Cited documents20181590
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