![]() Its orbit is hyperbolic, so it is not a closed one. If further observations confirm the unusual nature of this orbit, this object may be the first clear case of an interstellar comet”. Include dependency graph for astrometry.h: This graph shows which files directly or indirectly include this file: Go to the source code of this file. Although it is probably not too sensible to compute meaningful original and future barycentric orbits, given the very short arc of observations, the orbit below has e ~ 1.2 for both values. ![]() Unless there are serious problems with much of the astrometry listed below, strongly hyperbolic orbits are the only viable solutions. Good-quality measurement in our data (eg,PS). These values are also listed in the system metadata table ObjectQualityFlags. Williams, Associate Director of the Minor Planet center, wrote: “Further observations of this object are very much desired. ObjectQualityFlags values for column qualityFlag in table ObjectThin. Images were obtained and measured by Michael Schwartz and Paulo Holvorcem and astyrometry was published on the discovery circular by the Minor Planet Center. The comet C/2017 U1 is the dot of light in the center of the frame. We present evidence that the failure to account for proper motion is responsible for most of the regional biases seen in the astrometry of asteroids produced by the Pan-STARRS sky survey, as well. The images above were captured with the 32″, “Big Blue” robotic reflector available at Tenagra Observatories, as part of its work covered by the NASA grant #NNX15AE89G. News: see our new image of A/2017 U1 here. ![]() ![]() Updates: The Minor Planet Center issued a new Circular where the object has been renamed A/2017 U1: no cometary activity was detected in deep imaging. ![]()
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