Seniorenwirtschaft

Heinze, Rolf G.; Schneiders, Katrin

doi:10.1007/978-3-658-09630-4_24-1

Cited by 6 publications

(18 citation statements)

References 16 publications

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“…Of these, 48 were previously discovered objects with accurately known orbits, nine were previously discovered objects with poorly known orbits prior to our observations, and the remaining 140 were new discoveries for which we received designations from the Minor Planet Center. Heinze et al (2015) provides further details.…”

Section: Initial Distance Determinationsmentioning

confidence: 99%

“…We demonstrate RRV distance determination using a data set from the 0.9-meter WIYN telescope 1 , which we have analyzed using digital tracking (Heinze et al 2015) in order to enhance our sensitivity to faint asteroids. Digital tracking is a method for detecting faint moving objects that was first applied to the Kuiper Belt (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Digital tracking is a method for detecting faint moving objects that was first applied to the Kuiper Belt (e.g. Bernstein et al 2004), and very recently has begun to be applied to asteroids (Zhai et al 2014;Heinze et al 2015). Although the RRV distances we calculate herein are all based on our digital tracking analysis, the RRV method is equally useful for asteroids detected by more conventional means, or by other specialized methods such as those of Milani et al (1996) and Gural et al (2005).…”

Section: Introductionmentioning

confidence: 99%

“…The observations we use to demonstrate the usefulness of rotational reflex distances for asteroids were obtained using digital tracking, as described in our companion paper Heinze et al (2015). These data consist of 126 two-minute exposures of a single starfield that we acquired using the WIYN 0.9-meter telescope at Kitt Peak on the night of April 19, and 130 identically acquired images from the following night.…”

Section: A Brief Introduction To Digital Trackingmentioning

confidence: 99%

“…A separate trial stack is produced for each angular velocity vector in a finely-sampled grid that spans the full range of possible sky velocities for the target population. For MBAs, a digital tracking data set can span only one night (Heinze et al 2015), hence we analyze our April 19 and April 20 observations independently. Digital tracking has been used to great effect for Kuiper Belt objects (e.g.…”

Section: A Brief Introduction To Digital Trackingmentioning

confidence: 99%

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Precise Distances for Main-Belt Asteroids in Only Two Nights

Heinze

Metchev

2015

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We present a method for calculating precise distances to asteroids using only two nights of data from a single location -far too little for an orbit -by exploiting the angular reflex motion of the asteroids due to Earth's axial rotation. We refer to this as the rotational reflex velocity method. While the concept is simple and well-known, it has not been previously exploited for surveys of main-belt asteroids. We offer a mathematical development, estimates of the errors of the approximation, and a demonstration using a sample of 197 asteroids observed for two nights with a small, 0.9-meter telescope. This demonstration used digital tracking to enhance detection sensitivity for faint asteroids, but our distance determination works with any detection method. Forty-eight asteroids in our sample had known orbits prior to our observations, and for these we demonstrate a mean fractional error of only 1.6% between the distances we calculate and those given in ephemerides from the Minor Planet Center. In contrast to our two-night results, distance determination by fitting approximate orbits requires observations spanning 7-10 nights. Once an asteroid's distance is known, its absolute magnitude and size (given a statistically-estimated albedo) may immediately be calculated. Our method will therefore greatly enhance the efficiency with which 4-meter and larger telescopes can probe the size distribution of small (e.g. 100 meter) main belt asteroids. This distribution remains poorly known, yet encodes information about the collisional evolution of the asteroid belt -and hence the history of the Solar System.

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Section: Initial Distance Determinationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: A Brief Introduction To Digital Trackingmentioning

confidence: 99%

Section: A Brief Introduction To Digital Trackingmentioning

confidence: 99%

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Precise Distances for Main-Belt Asteroids in Only Two Nights

Heinze

Metchev

2015

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Seniorenwirtschaft – Management und Perspektiven

Grunwald

Reinhardt

2023

Perspektiven Sozialwirtschaft Und Sozialmanagement

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Digital Tracking Observations Can Discover Asteroids 10 Times Fainter Than Conventional Searches

Heinze

Metchev

Trollo

2015

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We describe digital tracking, a method for asteroid searches that greatly increases the sensitivity of a telescope to faint unknown asteroids. It has been previously used to detect faint Kuiper Belt objects using the Hubble Space Telescope and large groundbased instruments, and to find a small, fast-moving asteroid during a close approach to Earth. We complement this earlier work by developing digital tracking methodology for detecting asteroids using large-format CCD imagers. We demonstrate that the technique enables the ground-based detection of large numbers of new faint asteroids. Our methodology resolves or circumvents all major obstacles to the large-scale application of digital tracking for finding main belt and near-Earth asteroids. We find that for both asteroid populations, digital tracking can deliver a factor of ten improvement over conventional searches. Digital tracking has long been standard practice for deep Kuiper Belt surveys, but even there our methodology enables deeper integrations than have yet been attempted. Our search for main belt asteroids using a one-degree imager on the 0.9m WIYN telescope on Kitt Peak validates our methodology, delivers sensitivity to asteroids in a regime previously probed only with 4-meter and larger instruments, and leads to the detection of 156 previously unknown asteroids and 59 known objects in a single field. Digital tracking has the potential to revolutionize searches for faint moving objects ranging from the Kuiper Belt through main belt and near-Earth asteroids, and perhaps even anthropogenic space debris in low Earth orbit.

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Seniorenwirtschaft

Cited by 6 publications

References 16 publications

Precise Distances for Main-Belt Asteroids in Only Two Nights

Precise Distances for Main-Belt Asteroids in Only Two Nights

Seniorenwirtschaft – Management und Perspektiven

Digital Tracking Observations Can Discover Asteroids 10 Times Fainter Than Conventional Searches

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