Centaur Nessus Ephemeris: 1900-2050

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Centaur Nessus Ephemeris: 1900-2050

Centaur Nessus Ephemeris: 1900-2050

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Giving examples, we show that the constant offset method cannot accurately predict 6 out of the 13 observed positive occultations that have been successfully predicted by NIMA. One of these objects, 2014 UZ224, has already been studied in more detail from radiometric techniques by Gerdes et al. To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Planetary rings are observed not only around giant planets¹, but also around small bodies such as the Centaur Chariklo² and the dwarf planet Haumea³.

Predicting stellar occultations requires the accurate position of both the occulted star and the TNO ephemeris. Trans-Neptunian objects (TNOs) are a source of invaluable information to access the history and evolution of the outer solar system.One of its outputs is the object ephemeris in a format ( bsp—binary Spacecraft and Planet Kernel) that can be readily used by the SPICE/NAIF tools (Acton 1996; Acton et al. From C1, instrumental solutions are believed accurate to smaller than 3 mas rms per coordinate (see Bernstein et al. The offset was determined by using a set of observations performed a few weeks to a few months before the predicted occultation. However, a preliminary orbit fitting of some objects still showed the presence of real outliers (misidentifications).

The first one is that the ephemeris position of the target falls inside a box size of 4'' × 4'' centered on its observational counterpart. The dynamical model of a TNO’s motion includes the gravitational perturbations of the Sun and the eight planets.The limiting magnitude is that at which the magnitude of a star is measured with an uncertainty of 0. She includes information that has never been published before and describes the axis by house, sign and nakshatra as well as a short section on eclipses. In Section 3, we describe the procedure to identify the known solar system objects in the images and the data reduction. The determination of positions of TNOs and Centaurs from the DES images was subject to at least three constraints.



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