Spectral index

Spectral index - measure of the dependence of radiative flux density on frequency (astronomical term). Article “Spectral index” in English Wikipedia has 10.2 points for quality (as of July 1, 2025). The article contains 2 references and 3 sections.

This article has the best quality in Chinese Wikipedia. However, this article is the most popular in English version.

Since the creation of article “Spectral index”, its content was written by 18 registered users of English Wikipedia and edited by 51 registered Wikipedia users in all languages.

The article is cited 33 times in English Wikipedia and cited 172 times in all languages.

The highest Authors Interest rank from 2001:

• Local (English): #208899 in November 2013
• Global: #307452 in October 2012

The highest popularity rank from 2008:

• Local (English): #251145 in February 2020
• Global: #417043 in February 2020

There are 9 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	Chinese (zh) 譜指數		12.1291
2	Catalan (ca) Índex espectral		12.0216
3	Russian (ru) Спектральный индекс		10.5057
4	English (en) Spectral index		10.1698
5	Spanish (es) Índice espectral		9.1629
6	Ukrainian (uk) Спектральний індекс		6.9547
7	French (fr) Indice spectral		1.7241
8	Dutch (nl) Spectraalindex		1.2712
9	Italian (it) Indice spettrale		0.2007

More...

The following table shows the most popular language versions of the article.

The most popular language versions of the article "Spectral index" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Spectral index		130 102
2	French (fr) Indice spectral		11 293
3	Spanish (es) Índice espectral		10 342
4	Italian (it) Indice spettrale		7 139
5	Chinese (zh) 譜指數		3 976
6	Russian (ru) Спектральный индекс		3 516
7	Catalan (ca) Índex espectral		406
8	Dutch (nl) Spectraalindex		297
9	Ukrainian (uk) Спектральний індекс		127

More...

The following table shows the language versions of the article with the highest popularity in the last month.

The most popular language versions of the article "Spectral index" in June 2025

#	Language	Popularity award	Relative popularity
1	English (en) Spectral index		423
2	French (fr) Indice spectral		40
3	Italian (it) Indice spettrale		21
4	Russian (ru) Спектральный индекс		19
5	Spanish (es) Índice espectral		18
6	Ukrainian (uk) Спектральний індекс		9
7	Chinese (zh) 譜指數		7
8	Catalan (ca) Índex espectral		4
9	Dutch (nl) Spectraalindex		1

More...

The following table shows the language versions of the article with the highest Authors’ Interest.

Language versions of the article "Spectral index" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Spectral index		18
2	French (fr) Indice spectral		11
3	Italian (it) Indice spettrale		8
4	Catalan (ca) Índex espectral		6
5	Spanish (es) Índice espectral		2
6	Ukrainian (uk) Спектральний індекс		2
7	Chinese (zh) 譜指數		2
8	Dutch (nl) Spectraalindex		1
9	Russian (ru) Спектральный индекс		1

More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

Language versions of the article "Spectral index" with the highest AI in June 2025

#	Language	AI award	Relative AI
1	Catalan (ca) Índex espectral		0
2	English (en) Spectral index		0
3	Spanish (es) Índice espectral		0
4	French (fr) Indice spectral		0
5	Italian (it) Indice spettrale		0
6	Dutch (nl) Spectraalindex		0
7	Russian (ru) Спектральный индекс		0
8	Ukrainian (uk) Спектральний індекс		0
9	Chinese (zh) 譜指數		0

More...

The following table shows the language versions of the article with the highest number of citations.

Language versions of the article "Spectral index" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	French (fr) Indice spectral		109
2	English (en) Spectral index		33
3	Italian (it) Indice spettrale		8
4	Russian (ru) Спектральный индекс		6
5	Spanish (es) Índice espectral		5
6	Ukrainian (uk) Спектральний індекс		4
7	Catalan (ca) Índex espectral		3
8	Chinese (zh) 譜指數		3
9	Dutch (nl) Spectraalindex		1

More...

#	Language	Value
ca	Catalan Índex espectral
en	English Spectral index
es	Spanish Índice espectral
fr	French Indice spectral
it	Italian Indice spettrale
nl	Dutch Spectraalindex
ru	Russian Спектральный индекс
uk	Ukrainian Спектральний індекс
zh	Chinese 譜指數

Best Rank

English: #251145 02.2020

Global: #417043 02.2020

Best Rank

English: #208899 11.2013

Global: #307452 10.2012

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The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information