G
Gracjan Maciejewski
Researcher at Nicolaus Copernicus University in Toruń
Publications - 118
Citations - 2382
Gracjan Maciejewski is an academic researcher from Nicolaus Copernicus University in Toruń. The author has contributed to research in topics: Planet & Planetary system. The author has an hindex of 28, co-authored 113 publications receiving 2175 citations. Previous affiliations of Gracjan Maciejewski include University of Jena.
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Journal ArticleDOI
A Planetary-Mass Companion to the K0 Giant HD 17092
Andrzej Niedzielski,Andrzej Niedzielski,Maciej Konacki,Alex Wolszczan,Alex Wolszczan,Grzegorz Nowak,Gracjan Maciejewski,Christopher R. Gelino,M. Shao,Matthew Shetrone,Larry Ramsey +10 more
TL;DR: In this paper, a substellar-mass companion to the K0 giant HD 17092 with the Hobby-Eberly Telescope was discovered, and its orbit is characterized by a mild eccentricity of e = 0.17 and a semimajor axis of 1.3 AU.
Journal ArticleDOI
A Planetary Mass Companion to the K0 Giant HD 17092
Andrzej Niedzielski,Maciej Konacki,Alex Wolszczan,Grzegorz Nowak,Gracjan Maciejewski,R.C. Gelino,M. Shao,Matthew Shetrone,Larry Ramsey +8 more
TL;DR: The discovery of a substellar-mass companion to the K0-giant HD 17092 with the Hobby-Eberly Telescope was reported in this article. But the discovery of the substellar mass was not considered in this paper.
Journal ArticleDOI
Departure from the constant-period ephemeris for the transiting exoplanet WASP-12 b
Gracjan Maciejewski,Dinko Dimitrov,Matilde Fernández,Alfredo Sota,Grzegorz Nowak,Grzegorz Nowak,J. M. Ohlert,Grigor Nikolov,Ł. Bukowiecki,Tobias C. Hinse,Enric Palle,Enric Palle,Brandon Tingley,Brandon Tingley,Brandon Tingley,Diana P. Kjurkchieva,Jae Woo Lee,C.-U. Lee +17 more
TL;DR: In this paper, the transit times of the exoplanet WASP-12 b do not follow a linear ephemeris with a 5σ confidence level, and they may be approximated with a quadratic ephemerISR that gives a change rate in the orbital period of (−2.56 ± 0.40) × 10-2 s yr-1.
Journal ArticleDOI
CCD BV survey of 42 open clusters
TL;DR: In this article, a photometric survey of 42 open clusters was conducted to derive structural and astrophysical parameters for open clusters, including radial density profiles and core radii, and the ages, reddenings, and distances were obtained from the solar metallicity isochrone fitting.
Journal ArticleDOI
Identifying birth places of young isolated neutron stars
TL;DR: In this article, the authors identify parent associations for four of the so-called Magnificent seven neutron stars for which proper motion and distance estimates are available and trace back in time each neutron star and possible birth association center to find close encounters.