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Charge-Coupled Device Speckle Observations of Binary Stars with the WIYN Telescope. V. Measures during 2001-2006
A total of 1067 speckle observations of 345 binary stars are presented.Of these, 161 are double stars first resolved by Hipparcos, 17 areresolved for the first time in the observations presented here, and 21are stars previously discovered by our program and reported in earlierpapers in the series. In 947 cases, a magnitude difference is reportedalong with the relative astrometry. When comparing to systems with verywell-known orbits, we find that the root mean square (rms) deviation inseparation residuals is 2.81 ± 0.28 mas, and the rms deviation inposition angle residuals is 0.88 ± 0.07°. The magnitudedifference measures show no significant deviation from Hipparcosphotometry, and have average standard deviation of approximately 0.10mag as judged from repeat observations. Five important systemsdiscovered by Hipparcos are discussed.The WIYN Observatory is a joint facility of the University ofWisconsin-Madison, Indiana University, Yale University, and the NationalOptical Astronomy Observatories.
| Speckle Interferometry of New and Problem HIPPARCOS Binaries
The ESA Hipparcos satellite made measurements of over 12,000 doublestars and discovered 3406 new systems. In addition to these, 4706entries in the Hipparcos Catalogue correspond to double star solutionsthat did not provide the classical parameters of separation and positionangle (rho,theta) but were the so-called problem stars, flagged ``G,''``O,'' ``V,'' or ``X'' (field H59 of the main catalog). An additionalsubset of 6981 entries were treated as single objects but classified byHipparcos as ``suspected nonsingle'' (flag ``S'' in field H61), thusyielding a total of 11,687 ``problem stars.'' Of the many ground-basedtechniques for the study of double stars, probably the one with thegreatest potential for exploration of these new and problem Hipparcosbinaries is speckle interferometry. Results are presented from aninspection of 848 new and problem Hipparcos binaries, using botharchival and new speckle observations obtained with the USNO and CHARAspeckle cameras.
| ICCD Speckle Observations of Binary Stars. XVII. Measurements During 1993-1995 From the Mount Wilson 2.5-M Telescope.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1997AJ....114.1639H&db_key=AST
| ICCD Speckle Observations of Binary Stars.XV.An Investigation of Lunar Occultation Systems
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1996AJ....112.2260M&db_key=AST
| Binary Star Orbits From Speckle Interferometry. IX. The Nearby Solar-Type Speckle-Spectroscopic Binary Fin 347 AA
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1996AJ....112..276M&db_key=AST
| Photoelectric observations of lunar occultations. XV
The last (or possibly penultimate) paper in a series on lunaroccultations presents observations of 404 phenomena, preceded by somegeneral remarks of a retrospective nature. The series of observationsbegan in 1968. Data for 20 doubles or suspected doubles are presented,ranked in order of certainty, with designation 3 representing thesurest. Thirteen of the cases refer to stars not previously noted asdoubles. Seven determinations of angular diameters are presented, ofwhich three have been previously observed.
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Observation and Astrometry data
| Constellation: | Λέων |
| Right ascension: | 09h53m30.98s |
| Declination: | +16°57'01.4" |
| Apparent magnitude: | 8.897 |
| Distance: | 54.675 parsecs |
| Proper motion RA: | 0 |
| Proper motion Dec: | -50.3 |
| B-T magnitude: | 9.982 |
| V-T magnitude: | 8.987 |
Catalogs and designations:
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