Star catalog position and proper motion corrections in asteroid astrometry

Abstract

We provide a scheme to correct asteroid astrometric observations for star catalog systematic errors due to inaccurate star positions and proper motions. As reference we select the most accurate stars in the PPMXL catalog, i.e., those based on 2MASS astrometry. We compute position and proper motion corrections for 19 of the most used star catalogs. The use of these corrections provides better ephemeris predictions and improves the error statistics of astrometric observations, e.g., by removing most of the regional systematic errors previously seen in Pan-STARRS PS1 asteroid astrometry. The correction table is publicly available at ftp://ssd.jpl.nasa.gov/pub/ssd/debias/debias_2014.tgz and can be freely used in orbit determination algorithms to obtain more reliable asteroid trajectories.

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• Yarkovsky Drift Detections for 247 Near-Earth Asteroids
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• (3200) Phaethon: Bulk density from Yarkovsky drift detection
• Star catalog position and proper motion corrections in asteroid astrometry II: The Gaia era
• Prediscovery Observations and Orbit of Comet C/2017 K2 (PANSTARRS)
• YORP and Yarkovsky effects in asteroids (1685) Toro, (2100) Ra-Shalom, (3103) Eger, and (161989) Cacus
• Dynamical Evolution and Thermal History of Asteroids (3200) Phaethon and (155140) 2005 UD
• The atmospheric impact trajectory of asteroid 2014 AA
• Asteroid 1566 Icarus's size, shape, orbit, and Yarkovsky drift from radar observations
• Short arc orbit determination and imminent impactors in the Gaia era
• The Second Earth Trojan 2020 XL${}_5$
• Mass and Density of Asteroid (16) Psyche
• Asteroid mass estimation with the robust adaptive Metropolis algorithm
• High precision comet trajectory estimates: the Mars flyby of C/2013 A1 (Siding Spring)
• New Active Asteroid (6478) Gault
• The astrometric Gaia-FUN-SSO observation campaign of 99 942 Apophis
• Keplerian integrals, elimination theory and identification of very short arcs in a large database of optical observations
• A Global Astrometric Solution for Pan-STARRS referenced to ICRF2
• Ground-based astrometry calibrated by Gaia DR1: new perspectives in asteroid orbit determination
• Prospects of dynamical determination of General Relativity parameter beta and solar quadrupole moment J2 with asteroid radar astronomy
• Masses, bulk densities, and macroporosities of asteroids (15) Eunomia, (29) Amphitrite, (52) Europa, and (445) Edna based on Gaia astrometry
• Use of the Semilinear Method to predict the Impact Corridor on Ground
• Gaia-DR2 asteroid observations and INPOP planetary ephemerides
• Constraints on Comet 332P/Ikeya-Murakami
• Debiasing astro-Photometric Observations with Corrections Using Statistics (DePhOCUS)
• Two Hyperbolic Baldheads in the Solar System: 2017 U7 and 2018 C2
• A survey for occultation astrometry of Main Belt: expected astrometric performances
• Impact of non-gravitational effects on chaotic properties of retrograde orbits
• Fragment Dynamics in Active Asteroid 331P/Gibbs
• The Challenge of Measuring Asteroid Masses with Gaia DR2 astrometry
• Assessing the detection of the Yarkovsky effect using Gaia DR3 and FPR catalogues
• A practical re-weighting scheme of data fitting: application to asteroids orbit determination with Gaia