The precise CCD positions of Phoebe using Gaia DR3 catalogue

IF 1.9 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Planetary and Space Science Pub Date : 2026-02-01 Epub Date: 2026-01-31 DOI:10.1016/j.pss.2026.106240

N. Wang , Z.Y. Xue , B.B. Zhang , Q.Y. Peng , X.M. Cheng , Y.M. Ye

引用次数: 0

Abstract

Phoebe was observed in 2023 and 2024 by Yunnan Observatory 1.0 m telescope. These observations, along with those obtained from 2011–2014 by Yunnan Observatory 2.4 m telescope, were processed using the Gaia DR3 star catalogue. To improve positional measurements, the two-dimensional Gauss fit or the effective point spread function was applied. During the reduction, the geometric distortion of the calibration field was solved, the precision premium was reduced, and the differential colour refraction was accounted for. A total of 368 CCD observations were obtained. The theoretical position of Phoebe was derived from IMCCE ephemeris ph12 and Saturn’s position from JPL ephemeris DE441. The results show that the mean (O-C) is −0.002 and 0.016 arcsec in right ascension and in declination, respectively. The dispersion of our observations is 0.028 and 0.028 arcsec in right ascension and in declination, respectively.

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利用盖亚DR3星表获取菲比卫星CCD的精确位置

菲比于2023年和2024年由云南天文台1.0 m望远镜观测到。这些观测数据与云南天文台2.4米望远镜2011-2014年的观测数据一起，使用盖亚DR3星表进行处理。为了改进位置测量，采用了二维高斯拟合或有效点扩散函数。在还原过程中，解决了标定场的几何畸变，降低了精度溢价，并考虑了色差折射。共获得368个CCD观测数据。菲比的理论位置来自IMCCE的星历表ph12，土星的位置来自JPL的星历表DE441。结果表明，赤经和赤纬的平均（O-C）分别为- 0.002和0.016弧秒。我们的观测值在赤经和赤纬上的离散度分别为0.028弧秒和0.028弧秒。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Planetary and Space Science 地学天文-天文与天体物理

CiteScore

5.40

自引率

4.20%

发文量

126

审稿时长

15 weeks

期刊介绍： Planetary and Space Science publishes original articles as well as short communications (letters). Ground-based and space-borne instrumentation and laboratory simulation of solar system processes are included. The following fields of planetary and solar system research are covered: • Celestial mechanics, including dynamical evolution of the solar system, gravitational captures and resonances, relativistic effects, tracking and dynamics • Cosmochemistry and origin, including all aspects of the formation and initial physical and chemical evolution of the solar system • Terrestrial planets and satellites, including the physics of the interiors, geology and morphology of the surfaces, tectonics, mineralogy and dating • Outer planets and satellites, including formation and evolution, remote sensing at all wavelengths and in situ measurements • Planetary atmospheres, including formation and evolution, circulation and meteorology, boundary layers, remote sensing and laboratory simulation • Planetary magnetospheres and ionospheres, including origin of magnetic fields, magnetospheric plasma and radiation belts, and their interaction with the sun, the solar wind and satellites • Small bodies, dust and rings, including asteroids, comets and zodiacal light and their interaction with the solar radiation and the solar wind • Exobiology, including origin of life, detection of planetary ecosystems and pre-biological phenomena in the solar system and laboratory simulations • Extrasolar systems, including the detection and/or the detectability of exoplanets and planetary systems, their formation and evolution, the physical and chemical properties of the exoplanets • History of planetary and space research