Concepedia

J. L. Penna

JL

Statistics

Publications

11

Citations

341

H-Index

11

Active since

1998

Affiliations

National Observatory(Current)

Valongo Observatory

Osservatorio Astrofisico di Torino

Pulkovo Observatory

Observatoire de Paris

J. L. Penna is an author at National Observatory specializing in engineering, astrophysics, and solar activity.

Top concepts

Publications per year

1998–2018

11

Publications

11

PARALLAXES OF SOUTHERN EXTREMELY COOL OBJECTS (PARSEC). II. SPECTROSCOPIC FOLLOW-UP AND PARALLAXES OF 52 TARGETS

Federico Marocco, A. H. Andrei, R. L. Smart et al. · The Astronomical Journal · 2013 · 67 citations · Full text

NPARSEC: NTT Parallaxes of Southern Extremely Cool objects. Goals, targets, procedures and first results

R. L. Smart, C. G. Tinney, B. Bucciarelli et al. · Monthly Notices of the Royal Astronomical Society · 2013 · 66 citations · Full text

The large quasar reference frame (LQRF)

A. H. Andrei, J. Souchay, N. Zacharias et al. · Astronomy and Astrophysics · 2009 · 42 citations · Full text

The Large Quasar Reference Frame (LQRF) - an optical representation of the ICRS

A. H. Andrei, J. Souchay, N. Zacharias et al. · arXiv (Cornell University) · 2009 · 33 citations · Full text

Observed Variations of the Solar Diameter in 1998/2000

E. Reis Neto, A. H. Andrei, J. L. Penna et al. · Solar Physics · 2003 · 27 citations

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