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Astrometry and photometry of asteroids from the UkrVO database of astroplates 来自UkrVO星盘数据库的小行星天体测量和光度测定
Proceedings of the International Astronomical Union Pub Date : 2021-10-01 DOI: 10.1017/S1743921322000047
I. Vavilova, S. Shatokhina, L. Pakuliak, O. Yizhakevych, I. Eglitis, V. Andruk, Y. Protsyuk
{"title":"Astrometry and photometry of asteroids from the UkrVO database of astroplates","authors":"I. Vavilova, S. Shatokhina, L. Pakuliak, O. Yizhakevych, I. Eglitis, V. Andruk, Y. Protsyuk","doi":"10.1017/S1743921322000047","DOIUrl":"https://doi.org/10.1017/S1743921322000047","url":null,"abstract":"Abstract We present the developed methods of digitization, image processing, reduction, and scientific data mining with the latest reference catalogs, which allowed us to obtain a good positional and photometric accuracy in B-band of 6,500 asteroids down to 17.5 m from the Ukrainian Virtual Observatory database of astroplates. The archive includes FON-Kyiv, FON-Kitab, FON-Dushanbe sky surveys (1981–1996) and astroplates of the Baldone and Tautenburg observatories. For some of asteroids, observations are either completely absent or not enough over the certain time interval to the moments of their official discoveries (about 300 such objects were found). Positional observations during these time scales are highly useful for a more detailed study of the dynamics and orbital parameters of asteroids as well as the obtained photometric parameters are very complementary with present-day data for studying changes in brightness and light curves.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85880643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
IAU volume 15 issue 364 Cover and Front matter 国际天文学联合会第15卷第364期封面和封面问题
Proceedings of the International Astronomical Union Pub Date : 2021-10-01 DOI: 10.1017/S174392132200179X
Alessandra Celletti, C. Galeş, Cristian Beaugé, Anne Lemaître
{"title":"IAU volume 15 issue 364 Cover and Front matter","authors":"Alessandra Celletti, C. Galeş, Cristian Beaugé, Anne Lemaître","doi":"10.1017/S174392132200179X","DOIUrl":"https://doi.org/10.1017/S174392132200179X","url":null,"abstract":"","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77085333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Back-tracing space debris using proper elements 使用适当的元素对空间碎片进行反向追踪
Proceedings of the International Astronomical Union Pub Date : 2021-10-01 DOI: 10.1017/S1743921322000588
A. Celletti, G. Pucacco, T. Vartolomei
{"title":"Back-tracing space debris using proper elements","authors":"A. Celletti, G. Pucacco, T. Vartolomei","doi":"10.1017/S1743921322000588","DOIUrl":"https://doi.org/10.1017/S1743921322000588","url":null,"abstract":"Abstract Normal form methods allow one to compute quasi-invariants of a Hamiltonian system, which are referred to as proper elements. The computation of the proper elements turns out to be useful to associate dynamical properties that lead to identify families of space debris, as it was done in the past for families of asteroids. In particular, through proper elements we are able to group fragments generated by the same break-up event and we possibly associate them to a parent body. A qualitative analysis of the results is given by the computation of the Pearson correlation coefficient and the probability of the Kolmogorov-Smirnov statistical test.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80938590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chaos identification through the auto-correlation function indicator (ACFI) 基于自相关函数指示器的混沌识别
Proceedings of the International Astronomical Union Pub Date : 2021-10-01 DOI: 10.1017/S1743921321001307
V. Carruba, S. Aljbaae, R. C. Domingos, M. Huaman, W. Barletta
{"title":"Chaos identification through the auto-correlation function indicator (ACFI)","authors":"V. Carruba, S. Aljbaae, R. C. Domingos, M. Huaman, W. Barletta","doi":"10.1017/S1743921321001307","DOIUrl":"https://doi.org/10.1017/S1743921321001307","url":null,"abstract":"Abstract Close encounters or resonances overlaps can create chaotic motion in small bodies in the Solar System. Approaches that measure the separation rate of trajectories that start infinitesimally near, or changes in the frequency power spectrum of time series, among others, can discover chaotic motion. In this paper, we introduce the ACF index (ACFI), which is based on the auto-correlation function of time series. Auto-correlation coefficients measure the correlation of a time-series with a lagged duplicate of itself. By counting the number of auto-correlation coefficients that are larger than 5% after a certain amount of time has passed, we can assess how the time series auto-correlates with each other. This allows for the detection of chaotic time-series characterized by low ACFI values.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76310937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Some of the most interesting cases of close asteroid pairs perturbed by resonance 一些最有趣的近距离小行星对被共振扰动的例子
Proceedings of the International Astronomical Union Pub Date : 2021-10-01 DOI: 10.1017/S1743921321001320
A. Rosaev, E. Plávalová
{"title":"Some of the most interesting cases of close asteroid pairs perturbed by resonance","authors":"A. Rosaev, E. Plávalová","doi":"10.1017/S1743921321001320","DOIUrl":"https://doi.org/10.1017/S1743921321001320","url":null,"abstract":"Abstract We have randomly selected 20 close asteroid pairs (younger than 800 kyr) from known pairs, and by the application of backward numerical integration we have calculated their orbits. For the reason of speeding up the process of making the resonances visible, we have used a high value of Yarkowsky drift. The results of the calculation show that only two pairs appear to have a simple resonance with Earth and Jupiter while half of the tested pairs are visibly in the vicinity of three-body resonances. We have found a 2-1J-1M resonance for the pair (56232) 1999 JM31 and (115978) 2003 WQ56. Following our study of the pair (10123) Fideoja and (117306) 2004 VF21, we discovered a different resonance than the 7-2J mean motion resonance previously published: we have proved that this pair is perturbed by 9-6J-4M three body resonance.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76709150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Latitudinal variations of charged dust in co-orbital resonance with Jupiter 带电尘埃在木星共轨道共振中的纬度变化
Proceedings of the International Astronomical Union Pub Date : 2021-10-01 DOI: 10.1017/S1743921322000758
Stefanie Reiter, C. Lhotka
{"title":"Latitudinal variations of charged dust in co-orbital resonance with Jupiter","authors":"Stefanie Reiter, C. Lhotka","doi":"10.1017/S1743921322000758","DOIUrl":"https://doi.org/10.1017/S1743921322000758","url":null,"abstract":"Abstract The interplanetary magnetic field may cause large amplitude changes in the orbital inclinations of charged dust particles. In order to study this effect in the case of dust grains moving in 1:1 mean motion resonance with planet Jupiter, a simplified semi-analytical model is developed to reduce the full dynamics of the system to the terms containing the information of the secular evolution dominated by the Lorentz force. It was found that while the planet causes variations in all orbital elements, the influence of the magnetic field most heavily impacts the long-term evolution of the inclination and the longitude of the ascending node. The simplified secular-resonant model recreates the oscillations in these parameters very well in comparison to the full solution, despite neglecting the influence of the magnetic field on the other orbital parameters.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73685129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On Tides and Exoplanets 关于潮汐和系外行星
Proceedings of the International Astronomical Union Pub Date : 2021-10-01 DOI: 10.1017/S1743921322000059
S. Ferraz-Mello
{"title":"On Tides and Exoplanets","authors":"S. Ferraz-Mello","doi":"10.1017/S1743921322000059","DOIUrl":"https://doi.org/10.1017/S1743921322000059","url":null,"abstract":"Abstract This paper reviews the basic equations used in the study of the tidal variations of the rotational and orbital elements of a system formed by one star and one close-in planet as given by the creep tide theory and Darwin’s constant time lag (CTL) theory. At the end, it reviews and discusses the determinations of the relaxation factors (and time lags) in the case of host stars and hot Jupiters based on actual observations of orbital decay, stellar rotation and age, etc. It also includes a recollection of the basic facts concerning the variations of the rotation of host stars due to the leakage of angular momentum associated with stellar winds.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81044936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An algorithm for automatic identification of asymmetric transits in the TESS database 一种TESS数据库非对称凌日自动识别算法
Proceedings of the International Astronomical Union Pub Date : 2021-10-01 DOI: 10.1017/S1743921322000023
M. Vasylenko, Y. Pavlenko, D. Dobrycheva, I. Kulyk, O. Shubina, P. Korsun
{"title":"An algorithm for automatic identification of asymmetric transits in the TESS database","authors":"M. Vasylenko, Y. Pavlenko, D. Dobrycheva, I. Kulyk, O. Shubina, P. Korsun","doi":"10.1017/S1743921322000023","DOIUrl":"https://doi.org/10.1017/S1743921322000023","url":null,"abstract":"Abstract Currently, the Transiting Exoplanet Survey Satellite (TESS) searches for Earth-size planets around nearby dwarf stars. To identify specific weak variations in the light curves of stars, sophisticated data processing methods and analysis of the light curve shapes should be developed and applied. We report some preliminary results of our project to find and identify minima in the light curves of stars collected by TESS and stored in the MAST (Mikulski Archive for Space Telescopes) database. We developed Python code to process the short-cadence (2-min) TESS PDCSAP (Pre-search Data Conditioning Simple Aperture Photometry) light curves. Our code allows us to create test samples to apply machine learning methods to classify minima in the light curves taking into account their morphological signatures. Our approach will be used to find and analyze some sporadic events in the observed light curves originating from transits of comet-like bodies.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86512655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Weak stability transition region near the orbit of the Moon 月球轨道附近的弱稳定过渡区
Proceedings of the International Astronomical Union Pub Date : 2021-10-01 DOI: 10.1017/S1743921322000011
Z. Makó, J. Salamon
{"title":"Weak stability transition region near the orbit of the Moon","authors":"Z. Makó, J. Salamon","doi":"10.1017/S1743921322000011","DOIUrl":"https://doi.org/10.1017/S1743921322000011","url":null,"abstract":"Abstract This paper provides a study on the weak stability transition region in the framework of the planar elliptic restricted three-body problem. We define the lower boundary curve of the weak stability transition region and as a particular case, we determine this curve in the Sun-Earth system. The orbit of the Moon is near the lower boundary of the weak stability transition region.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81310527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Oscillations around tidal pseudo-synchronous solutions for circumbinary planets 行星潮汐伪同步解的振荡
Proceedings of the International Astronomical Union Pub Date : 2021-10-01 DOI: 10.1017/S1743921321001289
F. Zoppetti, H. Folonier, A. Leiva, C. Beaugé
{"title":"Oscillations around tidal pseudo-synchronous solutions for circumbinary planets","authors":"F. Zoppetti, H. Folonier, A. Leiva, C. Beaugé","doi":"10.1017/S1743921321001289","DOIUrl":"https://doi.org/10.1017/S1743921321001289","url":null,"abstract":"Abstract Tidal evolution of low-eccentric circumbinary planets is expected to drive the rotational evolution toward a pseudo-synchronous solution. In this work, we present a study of the oscillation amplitudes around this state by considering that the two central stars exert creep tides on the planet. These amplitudes are computed by direct numerical integrations of the creep equations and also by means of the calculation of the coefficients of the periodic terms in this stationary solution. As in the two-body-problem, the planetary spin and lag-angle are observed to have maximum oscillation amplitudes for stiff bodies and almost null oscillation for the gaseous regime, while the opposite behaviour is observed in the equatorial and polar flattenings. Our analytical approximation shows to be very accurate and specially necessary for very-low eccentric planets. However, the magnitudes of the oscillation amplitudes around the pseudo-synchronous solution in the circumbinary problem appears to be very small respect to the mean value. Thus, considering these oscillation in the computation of the tidal energy dissipation may not have a substantial contribution in the results, at least compared to the case in which only the mean values are taken into account.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86742538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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