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arXiv 2107.02771astro-ph.EP
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在基辅彗星站对六个最亮的海王星外天体的天体测量和光度观测

Astrometric and photometric observations of six brightest trans-Neptunian objects at the Kyiv comet station

Alexander Baransky, Oleksandra Lukina, Serhii Borysenko

摘要:

在这项工作中,我们集中观测了6个视星等大于20等的海王星外天体,给出了(134340)冥王星,(136108)妊神星,(136472)鸟神星,(136199)厄里斯星,(90482)Orcus和(20000)Varuna于2017-2019年在基辅彗星站(代码MPC 585)获得。为了进行观测,我们使用了0.7米的AZT-8反射镜和FLI PL 4710 CCD照相机以及Johnson-Ruminins测光系统的滤光片。从我们的图像中,我们测量了物体的天体测量位置,使用孔径测光方法计算了BVRI(主要是R)波段的视星等,并找到了几个波段的绝对星等和颜色指数。分析了我们的结果,探讨了0.7米望远镜对暗天体的天体测量和测光的局限性。

英文摘要:

In this work, we focused on observations of six trans-Neptunian objects (TNOs) whose apparent magnitudes are brighter than 20 mag. We present the results of astrometric and photometric observations of (134340) Pluto, (136108) Haumea, (136472) Makemake, (136199) Eris, (90482) Orcus and (20000) Varuna obtained at the Kyiv comet station (Code MPC 585) in 2017-2019. For observations, we used the 0.7-m reflector AZT-8 with the FLI PL4710 CCD camera and filters of the Johnson-Cousins photometric system. From our images, we measured the objects astrometric positions, calculated apparent magnitudes in the BVRI (mostly R) bands using the aperture photometry method, and found the absolute magnitudes together with the colour indices in several bands. Analysing our results, we investigate the limitation on the astrometry and photometry of faint objects with the 0.7-m telescope.

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