2290 Helffrich (Swedish Wikipedia)

Analysis of information sources in references of the Wikipedia article "2290 Helffrich" in Swedish language version.

refsWebsite

Global rank Swedish rank

75^th place

44^th place

274^th place

271^st place

1astroquery.readthedocs.io

low place

2,091^st place

astroquery.readthedocs.io

Minor Planet Center Queries, uppdaterad 5 november 2021.

nasa.gov

ssd.jpl.nasa.gov

”JPL Small-Body Database Browser 2290 Helffrich” (på engelska). Solar System Dynamics. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2290. Läst 23 juni 2017.

springer.com

link.springer.com

Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (2290) Helffrich. Springer Berlin Heidelberg. sid. 186. ISBN 978-3-540-29925-7. https://link.springer.com/referenceworkentry/10.1007/978-3-540-29925-7_2291. Läst 23 juni 2017