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researcher

J. Penna

12 papers hereh-index 10305 citations53 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position
  • middle author9
  • last author1

Across the 10 of 12 papers where every author was matched, so the position is known.

fields
  • astro-ph.SR7
  • astro-ph.IM4
  • astro-ph.CO1
same name
  • J. Penna — 2 papers, h 2

Either other researchers who publish under this name, or the same person where the external sources have not merged their records.

identity via Semantic Scholar / OpenAlex

activity
20092018
most citedParallaxes of Southern Extremely Cool objects (PARSEC) II: Spectroscopic Follow-up and Parallaxes of 52 Targets

68 citations · 268 across the 12 of their papers we have counts for

collaborators
Showing 2014Show all

1 paper · 1 filter

astro-ph.SR2014

The solar diameter series of the CCD Solar Astrolabe of the Observatório Nacional in Rio de Janeiro measured during cycle 23

Costantino Sigismondi, Sergio Calderari Boscardin, Alexandre Humberto Andrei +3

The interest on the solar diameter variations has been primary since the scientific revolution for different reasons: first the elliptical orbits found by Kepler in 1609 was confir…

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Not affiliated with arXiv. Researcher data from Semantic Scholar (ODC-BY) and OpenAlex.