Speckle interferometry of asteroids. II - 532 Herculina
Speckle interferometry of 532 Herculina performed on January 17 and 18, 1982, yields triaxial ellipsoid dimensions of (263 + or - 14) x (218 + or - 12) x (215 + or - 12) km, and a north pole for the asteroid within 7 deg of RA = 7h47min and DEC = -39 deg (ecliptic coordinates lambda = 132 deg beta =...
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1985
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ftnasantrs:oai:casi.ntrs.nasa.gov:19850048656 2023-05-15T17:39:49+02:00 Speckle interferometry of asteroids. II - 532 Herculina Drummond, J. D. Hege, E. K. Cocke, W. J. Freeman, J. D. Christou, J. C. Binzel, R. P. Unclassified, Unlimited, Publicly available Feb 1, 1985 http://ntrs.nasa.gov/search.jsp?R=19850048656 unknown http://ntrs.nasa.gov/search.jsp?R=19850048656 Accession ID: 85A30807 Copyright Other Sources 89 Icarus; 61; 232-240 1985 ftnasantrs 2012-02-15T16:20:48Z Speckle interferometry of 532 Herculina performed on January 17 and 18, 1982, yields triaxial ellipsoid dimensions of (263 + or - 14) x (218 + or - 12) x (215 + or - 12) km, and a north pole for the asteroid within 7 deg of RA = 7h47min and DEC = -39 deg (ecliptic coordinates lambda = 132 deg beta = -59 deg). In addition, a 'spot' some 75 percent brighter than the rest of the asteroid is inferred from both speckle observations and Herculina's lightcurve history. This bright complex, centered at asterocentric latitude -35 deg, longitude 145-165 deg, extends over a diameter of 55 deg (115 km) of the asteroid's surface. No evidence for a satellite is found from the speckle observations, which leads to an upper limit of 50 km for the diameter of any satellite with an albedo the same as or higher than Herculina. Other/Unknown Material North Pole NASA Technical Reports Server (NTRS) North Pole Lambda ENVELOPE(-62.983,-62.983,-64.300,-64.300) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
89 |
spellingShingle |
89 Drummond, J. D. Hege, E. K. Cocke, W. J. Freeman, J. D. Christou, J. C. Binzel, R. P. Speckle interferometry of asteroids. II - 532 Herculina |
topic_facet |
89 |
description |
Speckle interferometry of 532 Herculina performed on January 17 and 18, 1982, yields triaxial ellipsoid dimensions of (263 + or - 14) x (218 + or - 12) x (215 + or - 12) km, and a north pole for the asteroid within 7 deg of RA = 7h47min and DEC = -39 deg (ecliptic coordinates lambda = 132 deg beta = -59 deg). In addition, a 'spot' some 75 percent brighter than the rest of the asteroid is inferred from both speckle observations and Herculina's lightcurve history. This bright complex, centered at asterocentric latitude -35 deg, longitude 145-165 deg, extends over a diameter of 55 deg (115 km) of the asteroid's surface. No evidence for a satellite is found from the speckle observations, which leads to an upper limit of 50 km for the diameter of any satellite with an albedo the same as or higher than Herculina. |
format |
Other/Unknown Material |
author |
Drummond, J. D. Hege, E. K. Cocke, W. J. Freeman, J. D. Christou, J. C. Binzel, R. P. |
author_facet |
Drummond, J. D. Hege, E. K. Cocke, W. J. Freeman, J. D. Christou, J. C. Binzel, R. P. |
author_sort |
Drummond, J. D. |
title |
Speckle interferometry of asteroids. II - 532 Herculina |
title_short |
Speckle interferometry of asteroids. II - 532 Herculina |
title_full |
Speckle interferometry of asteroids. II - 532 Herculina |
title_fullStr |
Speckle interferometry of asteroids. II - 532 Herculina |
title_full_unstemmed |
Speckle interferometry of asteroids. II - 532 Herculina |
title_sort |
speckle interferometry of asteroids. ii - 532 herculina |
publishDate |
1985 |
url |
http://ntrs.nasa.gov/search.jsp?R=19850048656 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(-62.983,-62.983,-64.300,-64.300) |
geographic |
North Pole Lambda |
geographic_facet |
North Pole Lambda |
genre |
North Pole |
genre_facet |
North Pole |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19850048656 Accession ID: 85A30807 |
op_rights |
Copyright |
_version_ |
1766140593108418560 |