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See detailCharon's Size And Orbit From Double Stellar Occultations
Sicardy, Bruno; Braga-Ribas, F.; Widemann, T. et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2012, October 01)

Stellar occultations of a same star by both Pluto and Charon (double events) yield instantaneous relative positions of the two bodies projected in the plane of the sky, at 10km-level accuracy. Assuming a ... [more ▼]

Stellar occultations of a same star by both Pluto and Charon (double events) yield instantaneous relative positions of the two bodies projected in the plane of the sky, at 10km-level accuracy. Assuming a given pole orientation for Charon's orbit, double events provide the satellite plutocentric distance r at a given orbital longitude L (counted from the ascending node on J2000 mean equator), and finally, constraints on its orbit. A double event observed on 22 June 2008 provides r=19,564+/-14 km at L=153.483+/-0.071 deg. (Sicardy et al. 2011), while another double event observed on 4 June 2011 yields: r=19,586+/-15 km at L = 343.211+/-0.072 deg. (all error bars at 1-sigma level). These two positions are consistent with a circular orbit for Charon, with a semi-major axis of a=19,575+\-10 km. This can be compared to the circular orbit found by Buie et al. (2012), based on Hubble Space Telescope data, with a=19,573+/-2 km. The 4 June 2011 stellar occultation provides 3 chords across Charon, from which a radius of Rc= 602.4+/-1.6 km is derived. This value can be compared to that obtained from the 11 July 2005 occultation: Rc= 606.0+/-1.5 km (Person et al. 2006) and Rc= 603.6+/-1.4 km (Sicardy et al. 2006). A third double event, observed on 23 June 2011 is under ongoing analysis, and will be presented. Buie et al. (2012), AJ 144, 15-34 (2012) Person et al, AJ 132, 1575-1580 (2006) Sicardy et al., Nature 439, 52-54 (2006) Sicardy et al., AJ 141, 67-83 (2011) B.S. thanks ANR "Beyond Neptune II". L.A.Y. acknowledges support by NASA, New Horizons and National Geographic grants. We thank B. Barnard, M.J. Brucker, J. Daily, C. Erikson, W. Fukunaga, C. Harlinten, C. Livermore, C. Nance, J.R. Regester, L. Salas, P. Tamblyn, R. Westhoff for help in the observations. [less ▲]

Detailed reference viewed: 31 (0 ULg)
See detailLa charpente de la Halle aux viandes de Liège et son analyse dendrochronologique
Hoffsummer, Patrick ULg

in Bulletin de l'Institut Archéologique Liégeois (1989), 101

Detailed reference viewed: 74 (7 ULg)
See detailLa charpente de la maison Curtius et son analyse dendrochronologique
Hoffsummer, Patrick ULg

in Bulletin de l'Institut Archéologique Liégeois (1986), 98

Detailed reference viewed: 18 (5 ULg)
See detailLa charpente de la Salle des malades de l'Hôpital de la Biloque à Gand
Hoffsummer, Patrick ULg

in 51e Congrès de la Fédération des Cercles d'archéologie et d'histoire de Belgique, tome 1 (1992)

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See detailCharpentes anciennes en région Bruxelles-Capitale : réalisation d’un inventaire typologique et dendrochronologique
Weitz, Armelle ULg; Charruadas, Paulo ULg; Cremer, Sarah et al

in Charpentes historiques en bois de la construction à la restauration (2014, October 21)

Detailed reference viewed: 8 (3 ULg)
See detailCharpentes d'Europe
Hoffsummer, Patrick ULg

Book published by Institut du Patrimoine Wallon (2009)

Detailed reference viewed: 23 (3 ULg)
See detailLes charpentes de deux abbatiales prémontrées, Floreffe et Bonne-Espérance: l'apport de la dendrochronologie à l'histoire des techniques
Hoffsummer, Patrick ULg

in Plouvier, Martine (Ed.) Actes officiels des 31e et 32e colloques du Centre d'études et de recherches prémontrées, Loir-et-Cher 2005, Mont)Saint)Martin (Aisne), Leffe (Belgique), 200§, circarie de Floreffe (2010)

This a prensation of the typochronology of roof-framing in architecture of Prémontrés in Belgium. The examples a re coming fro different periods: 12th century, 13h century, 17th century, 18th century

Detailed reference viewed: 41 (3 ULg)
Peer Reviewed
See detailLes charpentes de la cathédrale Saint-Pierre à poitiers: typologie et dendrochronologie
Girardclos, Olivier; Hoffsummer, Patrick ULg; Perrault, Christophe

in Hoffsummer, Patrick (Ed.) Les charpentes du XIe au XIe au XIXe siècle: Grand Ouest de la France: typologie et évolution: analyse de la documentation de la Médiathèque de l'architectture et du patrimoine (2011)

The study of roof frames on Poitiers cathedral is espacially difficult regarding the number of phases from medieval parts to restorations during 18th century. Due to a important dendrochronological ... [more ▼]

The study of roof frames on Poitiers cathedral is espacially difficult regarding the number of phases from medieval parts to restorations during 18th century. Due to a important dendrochronological analysis, it was possible to establish that most of the original medieval parts of roofs remains despite the fact that archives said that the roof was "rebuilt" during the 18th century. In this context, Poitiers roofs became a important "jalon" for the general typo-chronology of roofs in Western France. [less ▲]

Detailed reference viewed: 43 (3 ULg)
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See detailLes charpentes de toiture en région bruxelloise : datation et étude typologique
Hoffsummer, Patrick ULg; Modrie, Sylvianne; Weitz, Armelle ULg

in Chronique, Archaeologia Mediaevalis 36, Bruxelles, 2013. (2013)

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See detailLes charpentes de toitures en pays mosan. L'apport de la dendrochronologie (11e-19e siècle)
Hoffsummer, Patrick ULg

in Archaeologia mediaevalis (1990), 13

This a presentation of a phD dissertation (1989) in University of Liège on evolution of roofs in the Mosan area with the use of dendrochronology. This thesis was a opportunity to build a new master ... [more ▼]

This a presentation of a phD dissertation (1989) in University of Liège on evolution of roofs in the Mosan area with the use of dendrochronology. This thesis was a opportunity to build a new master chronology for the datation of oak in Belgium area and surrounding for the period 672-1989. [less ▲]

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See detailLes charpentes de toitures en Wallonie
Hoffsummer, Patrick ULg

Book published by Ministère de la Région wallonne - 2ème édition (1999)

Detailed reference viewed: 91 (5 ULg)
See detailLes charpentes du XIe au XIXe siècle: typologie et évolution en France du Nord et en Belgique
Hoffsummer, Patrick ULg

Book published by Monum, Editions du patrimoine (2002)

Resarch has made considerable progress in the field of history of roofs,particularly thanks the contribution of dendrochronology. This book is the result of collaboration between architects, university ... [more ▼]

Resarch has made considerable progress in the field of history of roofs,particularly thanks the contribution of dendrochronology. This book is the result of collaboration between architects, university sholars, Belgian and French dendrochronologists, and offers a synthesis with regard to carpentry from 11th through the 19th century, from north of the Loire to Belgium. It contains a typological and chronological classification with 300 examples of carpentry constructions, and a catalogue of beautiful models preserved at the Center for reaserch on Historical Monuments in PAris. It is a valuable reference work for all those - art historians, architects, building restores - who are interested in historic carpentry [less ▲]

Detailed reference viewed: 44 (5 ULg)
See detailLes charpentes
Hoffsummer, Patrick ULg

in Warzée, Gaëtane (Ed.) L'ancienne abbaye de Floreffe, 1121-1996 (1996)

Detailed reference viewed: 16 (0 ULg)
See detailLes charpentes
Hoffsummer, Patrick ULg; Houbrechts, David

in Dierkens, Alain; Duvosquel, Jean-Marie; Nyst, Nathalie (Eds.) L'ancienne église abbatiale Saint-Hubert (1999)

Detailed reference viewed: 23 (1 ULg)
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See detailLa charte d'affranchissement de Saint-Léger : 2 mars 1368
Kurth, Godefroid ULg

in Bulletin de la Commission Royale d'Histoire (1878), V, 1(4e série),

Detailed reference viewed: 30 (5 ULg)
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See detailCharte de qualité - Un outil pour vous aider à développer et à réguler un projet d'école - Vademecum
Grignard, Sophie; Vandoorne, Chantal ULg; Plas, Cécile

E-print/Working paper (2008)

Detailed reference viewed: 44 (9 ULg)
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See detailLa charte de Richer de Liège du 16 novembre 932. Une copie historique à réhabiliter
Close, Florence ULg

in Bulletin de la Commission Royale d'Histoire (2011), 177

Le 16 novembre 932, l’évêque de Liège Richer consacra un autel à la sainte Trinité en la cathédrale Saint-Lambert de Liège et le dota richement ; il consigna cette décision par écrit. La charte de ... [more ▼]

Le 16 novembre 932, l’évêque de Liège Richer consacra un autel à la sainte Trinité en la cathédrale Saint-Lambert de Liège et le dota richement ; il consigna cette décision par écrit. La charte de fondation est parvenue jusqu’à nous sous la forme d’une copie historique isolée insérée dans les Gesta episcoporum Tungrensium Traiectensium et Leodiensium du chanoine Anselme de Liège. Cet article entend souligner l’intérêt de ce document tant pour l’histoire de la chancellerie liégeoise que pour celle de la réforme religieuse carolingienne dans l’espace lotharingien. Il comporte en annexe une nouvelle édition critique de ce document établie sur la base d’une confrontation de sept copies réparties en deux classes selon une typologie différente de celle de R. Koepke, l’éditeur de la chronique d’Anselme pour les Monumenta Germaniae Historica. [less ▲]

Detailed reference viewed: 41 (3 ULg)
See detailChartes de l'Abbaye de Saint-Hubert en Ardenne
Kurth, Godefroid ULg

Book published by Imbreghts (1903)

Detailed reference viewed: 68 (10 ULg)
See detailChartes originales françaises de l'abbaye du Val-Benoît datant de 1259 à 1297
Mazziotta, Nicolas ULg

Master's dissertation (2001)

Detailed reference viewed: 31 (5 ULg)