Tropical year (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Tropical year" in English language version.

Last modified: 22:17:35, 8 September 2026 (UTC)

Ref.Un. Ref.Website

Global rank English rank

179adsabs.harvard.edu

14^th place

9^th place

33web.archive.org

1^st place

33navy.mil

206^th place

129^th place

22archive.org

6^th place

22worldcat.org

4^th place

22pas.va

low place

21doi.org

2^nd place

21semanticscholar.org

15^th place

8^th place

11hmnao.com

low place

11bipm.org

1,781^st place

2,481^st place

11st-andrews.ac.uk

1,053^rd place

1,274^th place

11nasa.gov

12^th place

73^rd place

11iers.org

low place

adsabs.harvard.edu (Global: 14^th place; English: 9^th place)

ui.adsabs.harvard.edu

Borkowski 1991, p. 122. Borkowski, K.M. (1991). "The tropical year and the solar calendar". Journal of the Royal Astronomical Society of Canada. 85 (3): 121–130. Bibcode:1991JRASC..85..121B.
Meeus & Savoie 1992, p. 40. Meeus, J.; Savoie, D. (1992). "The history of the tropical year". Journal of the British Astronomical Association. 102 (1): 40–42. Bibcode:1992JBAA..102...40M.
Meeus & Savoie 1992, p. 41. Meeus, J.; Savoie, D. (1992). "The history of the tropical year". Journal of the British Astronomical Association. 102 (1): 40–42. Bibcode:1992JBAA..102...40M.
Meeus & Savoie 1992, p. 42. Meeus, J.; Savoie, D. (1992). "The history of the tropical year". Journal of the British Astronomical Association. 102 (1): 40–42. Bibcode:1992JBAA..102...40M.
Morrison & Stephenson 2004. Morrison, L.V.; Stephenson, F.R. (2004). "Historical values of the Earth's clock error ΔT and the calculation of eclipses". Journal for the History of Astronomy. 35 (3): 327–336. Bibcode:2004JHA....35..327M. doi:10.1177/002182860403500305. S2CID 119021116.
Borkowski 1991, p. 126. Borkowski, K.M. (1991). "The tropical year and the solar calendar". Journal of the Royal Astronomical Society of Canada. 85 (3): 121–130. Bibcode:1991JRASC..85..121B.
Meeus & Savoie 1992, p. 362. Meeus, J.; Savoie, D. (1992). "The history of the tropical year". Journal of the British Astronomical Association. 102 (1): 40–42. Bibcode:1992JBAA..102...40M.
In negative numbers for dates in the past; McCarthy & Seidelmann 2009, p. 18, calculated from planetary model of Laskar 1986. McCarthy, D.D.; Seidelmann, P.K. (2009). Time from Earth rotation to atomic physics. Weinhein: Wiley-VCH Verlag GmbH & Co. KGaA. Laskar, J. (1986). "Secular terms of classical planetary theories using the results of general theory". Astronomy and Astrophysics. 157 (1): 59–70. Bibcode:1986A&A...157...59L. ISSN 0004-6361. Note: In the article at this URL, page 68 should be put before page 66.
Laskar 1986, p. 64. Laskar, J. (1986). "Secular terms of classical planetary theories using the results of general theory". Astronomy and Astrophysics. 157 (1): 59–70. Bibcode:1986A&A...157...59L. ISSN 0004-6361. Note: In the article at this URL, page 68 should be put before page 66.

archive.org (Global: 6^th place; English: 6^th place)

Seidelmann 1992, p. 317. Seidelmann, P. K., ed. (1992). Explanatory Supplement to the Astronomical Almanac (2nd ed.). Sausalito, CA: University Science Books. ISBN 0-935702-68-7.
Seidelmann 1992, pp. 576–581. Seidelmann, P. K., ed. (1992). Explanatory Supplement to the Astronomical Almanac (2nd ed.). Sausalito, CA: University Science Books. ISBN 0-935702-68-7.

bipm.org (Global: 1,781^st place; English: 2,481^st place)

"13th CGPM (1967/68, Resolution 1; CR, 103 and Metrologia, 1968, 4, 43)". The International System of Units (PDF) (Report). Bureau International des Poids et Mesures. 2006. p. 113. Archived from the original (PDF) on December 16, 2008. The second is the duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom. Via "The SI brochure". BIMP. Archived from the original on October 1, 2009.

doi.org (Global: 2^nd place; English: 2^nd place)

Morrison & Stephenson 2004. Morrison, L.V.; Stephenson, F.R. (2004). "Historical values of the Earth's clock error ΔT and the calculation of eclipses". Journal for the History of Astronomy. 35 (3): 327–336. Bibcode:2004JHA....35..327M. doi:10.1177/002182860403500305. S2CID 119021116.

hmnao.com (Global: low place; English: low place)

asa.hmnao.com

"Astronomical almanac online glossary". US Naval Observatory. 2020.

iers.org (Global: low place; English: low place)

datacenter.iers.org

"IERS Bulletin B Number 456". International Earth Rotation and Reference Systems Service. February 3, 2026. Retrieved September 8, 2026.

nasa.gov (Global: 12^th place; English: 73^rd place)

deepspace.jpl.nasa.gov

Jet Propulsion Laboratory (2005). DSN: History. NASA.

navy.mil (Global: 206^th place; English: 129^th place)

aa.usno.navy.mil

Richards, E.G. "Calendars". In Urban & Seidelmann (2013), p. 587. Urban, S.E.; Seidelmann, P. K., eds. (2013). Explanatory supplement to the astronomical almanac (PDF) (3rd ed.). Mill Valley, CA: University Science Books. ISBN 978-1-891389-85-6. Archived from the original (PDF) on April 30, 2019. Retrieved May 6, 2018.
Urban & Seidelmann 2013, p. 595. Urban, S.E.; Seidelmann, P. K., eds. (2013). Explanatory supplement to the astronomical almanac (PDF) (3rd ed.). Mill Valley, CA: University Science Books. ISBN 978-1-891389-85-6. Archived from the original (PDF) on April 30, 2019. Retrieved May 6, 2018.

maia.usno.navy.mil

"Common Units and Conversions in Earth Orientation". United States Naval Observatory.

pas.va (Global: low place; English: low place)

Dobrzycki, J. "Astronomical aspects of the calendar reform". In Coyne, Hoskin & Pedersen (1983), p. 123. Coyne, G.V.; Hoskin, M.A.; Pedersen, O., eds. (1983). Gregorian reform of the calendar. Vatican Observatory.
North, J.D. "The Western calendar – 'Intolerabilis, horribilis, et derisibilis'; four centuries of discontent". In Coyne, Hoskin & Pedersen (1983), pp. 75–76. Coyne, G.V.; Hoskin, M.A.; Pedersen, O., eds. (1983). Gregorian reform of the calendar. Vatican Observatory.

semanticscholar.org (Global: 15^th place; English: 8^th place)

api.semanticscholar.org

Morrison & Stephenson 2004. Morrison, L.V.; Stephenson, F.R. (2004). "Historical values of the Earth's clock error ΔT and the calculation of eclipses". Journal for the History of Astronomy. 35 (3): 327–336. Bibcode:2004JHA....35..327M. doi:10.1177/002182860403500305. S2CID 119021116.

st-andrews.ac.uk (Global: 1,053^rd place; English: 1,274^th place)

mathshistory.st-andrews.ac.uk

O'Connor & Robertson 1999. O'Connor, J. J.; Robertson, E. F. (November 1999). "Biography of Ulugh Beg". MacTutor. Retrieved March 8, 2025.

web.archive.org (Global: 1^st place; English: 1^st place)

"13th CGPM (1967/68, Resolution 1; CR, 103 and Metrologia, 1968, 4, 43)". The International System of Units (PDF) (Report). Bureau International des Poids et Mesures. 2006. p. 113. Archived from the original (PDF) on December 16, 2008. The second is the duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom. Via "The SI brochure". BIMP. Archived from the original on October 1, 2009.
Richards, E.G. "Calendars". In Urban & Seidelmann (2013), p. 587. Urban, S.E.; Seidelmann, P. K., eds. (2013). Explanatory supplement to the astronomical almanac (PDF) (3rd ed.). Mill Valley, CA: University Science Books. ISBN 978-1-891389-85-6. Archived from the original (PDF) on April 30, 2019. Retrieved May 6, 2018.
Urban & Seidelmann 2013, p. 595. Urban, S.E.; Seidelmann, P. K., eds. (2013). Explanatory supplement to the astronomical almanac (PDF) (3rd ed.). Mill Valley, CA: University Science Books. ISBN 978-1-891389-85-6. Archived from the original (PDF) on April 30, 2019. Retrieved May 6, 2018.

worldcat.org (Global: 4^th place; English: 4^th place)

search.worldcat.org

In negative numbers for dates in the past; McCarthy & Seidelmann 2009, p. 18, calculated from planetary model of Laskar 1986. McCarthy, D.D.; Seidelmann, P.K. (2009). Time from Earth rotation to atomic physics. Weinhein: Wiley-VCH Verlag GmbH & Co. KGaA. Laskar, J. (1986). "Secular terms of classical planetary theories using the results of general theory". Astronomy and Astrophysics. 157 (1): 59–70. Bibcode:1986A&A...157...59L. ISSN 0004-6361. Note: In the article at this URL, page 68 should be put before page 66.
Laskar 1986, p. 64. Laskar, J. (1986). "Secular terms of classical planetary theories using the results of general theory". Astronomy and Astrophysics. 157 (1): 59–70. Bibcode:1986A&A...157...59L. ISSN 0004-6361. Note: In the article at this URL, page 68 should be put before page 66.

Tropical year (English Wikipedia)

adsabs.harvard.edu (Global: 14th place; English: 9th place)

ui.adsabs.harvard.edu

archive.org (Global: 6th place; English: 6th place)

bipm.org (Global: 1,781st place; English: 2,481st place)

doi.org (Global: 2nd place; English: 2nd place)

hmnao.com (Global: low place; English: low place)

asa.hmnao.com

iers.org (Global: low place; English: low place)

datacenter.iers.org

nasa.gov (Global: 12th place; English: 73rd place)

deepspace.jpl.nasa.gov

navy.mil (Global: 206th place; English: 129th place)

aa.usno.navy.mil

maia.usno.navy.mil

pas.va (Global: low place; English: low place)

semanticscholar.org (Global: 15th place; English: 8th place)

api.semanticscholar.org

st-andrews.ac.uk (Global: 1,053rd place; English: 1,274th place)

mathshistory.st-andrews.ac.uk

web.archive.org (Global: 1st place; English: 1st place)

worldcat.org (Global: 4th place; English: 4th place)

search.worldcat.org

adsabs.harvard.edu (Global: 14^th place; English: 9^th place)

archive.org (Global: 6^th place; English: 6^th place)

bipm.org (Global: 1,781^st place; English: 2,481^st place)

doi.org (Global: 2^nd place; English: 2^nd place)

nasa.gov (Global: 12^th place; English: 73^rd place)

navy.mil (Global: 206^th place; English: 129^th place)

semanticscholar.org (Global: 15^th place; English: 8^th place)

st-andrews.ac.uk (Global: 1,053^rd place; English: 1,274^th place)

web.archive.org (Global: 1^st place; English: 1^st place)

worldcat.org (Global: 4^th place; English: 4^th place)