The Asteroid Ephemeris 1900 to 2050

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When a single energetic event occurs, the problem of determining the location of the event can be constrained to have a pseudoangular observation occur at the event epoch and location. As is the case for the ejection events discovered and data association techniques used, it is likely that at least two epochs of images containing the same debris particle are obtained. When only two epochs are available for a single particle, that gives four observations (two sets of RA and DEC) and six unknowns necessary to estimate the full state of the particle's trajectory (three components each of position and velocity), producing an indeterminate system in our approach (Pelgrift et al., 2020, describe an alternative approach for analysis of such cases). However, when at least three particles are seen in two sets of images each, that produces 12 observations with 12 unknowns (the three components of velocity for each particle and the three components of position common to all the particles). If at least three particles are determined from a single event spanning at least two epochs, it is possible to estimate the location of that ejecta origin with conic trajectories. Any number of particles or observations more than this allows for an overdetermined system to be solved. Ephemerides in PDF for the planets with Chiron, Lilith, and True North Node: 2023 Ephemeris (PDF), 2024 Ephemeris (PDF), 2025 Ephemeris (PDF), 2026 Ephemeris (PDF), 2027 Ephemeris (PDF), 2028 Ephemeris (PDF) , 2029 Ephemeris (PDF) The following ephemerides are for selected asteroids: Eros, Psyche, Sappho, Ceres, Pallas, Juno, Vesta, and Chiron: Charlier, C. V. L. (Dec. 1910). On multiple solutions in the determination of orbits from three observations. MNRAS, 71( 2), 120– 124. https://doi.org/10.1093/mnras/71.2.120

Eros represents sexual objectification, passion and desire, and creativity. Note that Eros is not always sexual, per se, as Eros represents creative passion as well. In the chart, it can point to areas into which we pour a lot of passion. Taff, L. G. ( 1984). On initial orbit determination. The Astronomical Journal, 89, 1426– 1428. https://doi.org/10.1086/113644 Gauss, K. F. ( 1963). Theory of the motion of the heavenly bodies moving about the sun in conic section. New York: Dover.Lightcurve inversion for the GS-asteroid data was carried out using Lommel-Seeliger ellipsoids and general convex shapes for two principal cases: one where all of the lightcurves were assumed to represent relative photometry and the other where all were assumed to represent absolute photometry. In addition, two error models were studied for each of the principal cases: the first model assigned a unit weight for each ground-based lightcurve, whereas the second model differed for the relative and absolute photometry as described in Section 3. Consequently, the analysis consisted of 8 different case studies. Need help finding out the sign of your (or someone else’s) planets? See our article, How to Obtain Your Natal Chart. Note that the four major asteroids, included in the monthly ephemerides above for the year 2025, are Ceres, Juno, Vesta, and Pallas. Also added are Eros, Sappho, Psyche, and Chiron. This was a custom ephemeris built using the excellent and highly recommended software program, Sirius 3.0. Each month’s ephemeris shows the position of the asteroid in the zodiac at noon on that day. For example, on January 1st, 2009, at noon UT, Ceres was at 13 degrees Virgo 14 minutues, and the following day at the same time, it was at 13 degrees Virgo 18 minutes.

The ephemerides above show the daily positions, month to month in the year 2024, of the four major asteroids, Chiron, and select minor asteroids.The reviewer AC declared a past collaboration with the author AC to the handling editor. Publisher’s Note Psyche in the natal chart represents the soul and the mind. It can represent love, passion, fear of betrayal, envy, fragility, vulnerability when we are in love, and other sensitive relationship dynamics. It is about getting to know our relationship needs and learning to trust. The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The use of optical images for angles-only IOD is widely applied in the determination of celestial orbits as well as in the space situation awareness (SSA) community (Gauss, 1963; Gibbs, 1889; Schaeperkoetter & Mortari, 2011; Taff, 1984). Short-arc IOD techniques have successfully been utilized in the determination of asteroid ephemerides (Bowell et al., 2002; Chesley, 2004; Gronchi, 2004). These techniques have been expanded from traditional angles-only IOD to include admissible region constraints on the orbit solution due to limited amounts of information from short-arc data sets (Gronchi, 2004; Milani et al., 2004, 2005; Spoto et al., 2018). Short-arc angles-only asteroid orbit determination utilizes ground-based measurements. The SSA community has expanded IOD techniques to the use of space-based imaging platforms (DeMars et al., 2009; Hussein et al., 2014; Kaya & Snow, 1991; Snow & Kaya, 1992). Charlier( 1910, 1911) postulated four potential solutions to the IOD problem using angles-only observations regardless of the location of the observer. Wie and Ahn( 2017) expanded upon Charlier's postulations to provide guidelines concerning the multiple solutions of angles-only orbit solutions. General angles-only orbit solutions disregard the uncertainties associated with the orbital solution. This limitation has been investigated through Gauss's solution via Binz and Healy( 2017) utilizing sigma points to ascertain more representative uncertainties when compared to traditional least squares-based solutions.

Consider an asteroid in principal-axis rotation. We denote the asteroid’s rotation period by P, the pole orientation in ecliptic longitude and latitude by ( λ, β) T (J2000.0, T stands for transpose), and the rotational phase at a given epoch t 0 by φ 0. As to the asteroid’s shape, in the inverse problem, we consider both ellipsoidal shapes and general convex shapes. In the forward problem, we incorporate star-like shapes described by the Gaussian-random-sphere geometry. OSIRIS-REx Team ( 2019). Evidence for widespread hydrated minerals on asteroid (101955) Bennu. Nature Astronomy, 3( 4), 332– 340. https://doi.org/10.1038/s41550-019-0722-2The inverse methods are here applied to the ∼500 asteroids with ground-based and Gaia DR2 lightcurve data and to the simulated lightcurve data of the GS-asteroid. 4.1 Asteroids of Gaia Data Release 2 Eros represents objectification, passion and desire, the thrill of the chase, and creative power. In the birth chart, this asteroid can point to areas where we pour a lot of heart, passion, and enthusiasm.