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191. SDSS observations of Kuiper belt objects
ID:
ivo://CDS.VizieR/J/ApJ/749/10
Title:
SDSS observations of Kuiper belt objects
Short Name:
J/ApJ/749/10
Date:
21 Oct 2021
Publisher:
CDS
Description:
Colors of trans-Neptunian objects (TNOs) are used to study the evolutionary processes of bodies in the outskirts of the solar system and to test theories regarding their origin. Here I describe a search for serendipitous Sloan Digital Sky Survey (SDSS) observations of known TNOs and Centaurs. I present a catalog of SDSS photometry, colors, and astrometry of 388 measurements of 42 outer solar system objects. I find weak evidence, at the {approx} 2{sigma} level (per trial), for a correlation between the g - r color and inclination of scattered disk objects and hot classical Kuiper Belt objects. I find a correlation between the g - r color and the angular momentum in the z direction of all the objects in this sample. These findings should be verified using larger samples of TNOs. Light curves as a function of phase angle are constructed for 13 objects. The steepness of the slopes of these light curves suggests that the coherent backscatter mechanism plays a major role in the reflectivity of outer solar system small objects at small phase angles. I find weak evidence for an anticorrelation, significant at the 2{sigma} confidence level (per trial), between the g-band phase-angle slope parameter and the semimajor axis, as well as the aphelion distance, of these objects (i.e., they show a more prominent "opposition effect" at smaller distances from the Sun). However, this plausible correlation should be verified using a larger sample. I discuss the origin of this possible correlation and argue that if this correlation is real it probably indicates that "Sedna"-like objects have a different origin than other classes of TNOs. Finally, I identify several objects with large variability amplitudes.
192. SDSS Solar System Objects
ID:
ivo://CDS.VizieR/J/A+A/652/A59
Title:
SDSS Solar System Objects
Short Name:
J/A+A/652/A59
Date:
22 Feb 2022
Publisher:
CDS
Description:
The populations of small bodies of the Solar System (asteroids, comets, Kuiper-Belt objects) are used to constrain the origin and evolution of the Solar System. Both their orbital distribution and composition distribution are required to track the dynamical pathway from their regions of formation to their current locations. We aim at increasing the sample of Solar System objects that have multi-filter photometry and compositional taxonomy. We search for moving objects in the archive of the Sloan Digital Sky Survey. We attempt at maximizing the number of detections by using loose constraints on the extraction. We then apply a suite of filters to remove false-positive detections (stars or galaxies) and mark out spurious photometry and astrometry. We release a catalog of 1542522 entries, consisting of 1036322 observations of 379714 known and unique SSOs together with 506200 observations of moving sources not linked with any known SSOs. The catalog completeness is estimated to be about 95% and the purity to be above 95% for known SSOs.
193. Searching for super-fast rotators using PS1
ID:
ivo://CDS.VizieR/J/ApJS/241/6
Title:
Searching for super-fast rotators using PS1
Short Name:
J/ApJS/241/6
Date:
21 Oct 2021
Publisher:
CDS
Description:
A class of asteroids, called large super-fast rotators (large SFRs), have rotation periods shorter than 2hr and diameters larger than ~0.3km. They pose challenges to the usual interior rubble-pile structure unless a relatively high bulk density is assumed. So far, only six large SFRs have been found. Therefore, we present a survey of asteroid rotation periods using the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS) 1 telescope during 2016 October 26-31 to search for more large SFRs and to study their properties. A total of 876 reliable rotation periods are measured, among which seven are large SFRs, thereby increasing the inventory of known large SFRs. These seven newly discovered large SFRs have diverse colors and locations in the main asteroid belt, suggesting that the taxonomic tendency and the location preference in the inner main belt of the six previously known large SFRs could be a bias due to various observational limits. Interestingly, five out of the seven newly discovered large SFRs are mid main-belt asteroids (MBAs). Considering the rare discovery rates of large SFR in the previously similar surveys and the survey condition in this work, the chance of detecting a large SFR in the inner main belt seems to be relatively low. This probably suggests that the inner main belt harbors fewer large SFRs than the mid main belt. From our survey, we also found a drop in the number appearing at f>5rev/day on the spin-rate distribution for the outer MBAs of D<3km, which was reported for the inner and mid main belt by Chang et al. (2015, J/ApJS/219/27 ; 2016ApJ...816...71C).
194. Short-term variability of 29 minor planets
ID:
ivo://CDS.VizieR/J/A+A/522/A93
Title:
Short-term variability of 29 minor planets
Short Name:
J/A+A/522/A93
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present results of 6 years of observations, reduced and analyzed with the same tools in a systematic way. We present completely new data on 15 objects (1998SG35, 2002GB10, 2003EL61, 2003FY128, 2003MW12, 2003OP32, 2003WL7, 2004SB60, 2004UX10, 2005CB79, 2005RM43, 2005RN43, 2005RR43, 2005UJ438, 2007UL126 (or 2002KY14)), for 5 objects we present a new analysis of previously published results plus additional data (2000WR106, 2002CR46, 2002TX300, 2002VE95, 2005FY9) and for 9 objects we present a new analysis of data already published (1996TL66, 1999TZ1, 2001YH140, 2002AW197, 2002LM60, 2003AZ84, 2003CO1, 2003VS2, 2004DW). Lightcurves, possible rotation periods and photometric amplitudes are reported for all of them. The photometric variability is smaller than previously thought: the mean amplitude of our sample is 0.1mag and only around 15% of our sample has a larger variability than 0.15mag. The smaller variability than previously thought seems to be a bias of previous observations. We find a very weak trend of faster spinning objects towards smaller sizes, which appears to be consistent with the fact that the smaller objects are more collisionally evolved, but could also be a specific feature of the Centaurs, the smallest objects in our sample.We also find that the smaller the objects, the larger their amplitude, which is also consistent with the idea that small objects are more collisionally evolved and thus more deformed. Average rotation rates from our work are 7.5h for the whole sample, 7.6h for the TNOs alone and 7.3h for the Centaurs. All of them appear to be somewhat faster than what one can derive from a compilation of the scientific literature and our own results. Maxwellian fits to the rotation rate distribution give mean values of 7.5h (for the whole sample) and 7.3h (for the TNOs only). Assuming hydrostatic equilibrium we can determine densities from our sample under the additional assumption that the lightcurves are dominated by shape effects, which is likely no realistic. The resulting average density is 0.92g/cm^3^ which is not far from the density constraint that one can derive from the apparent spin barrier that we observe.
195. Sky Body Tracker
ID:
ivo://vopdc.obspm/imcce/skybot
Title:
Sky Body Tracker
Short Name:
SkyBoT
Date:
10 Jan 2017
Publisher:
Paris Astronomical Data Centre - IMCCE
Description:
SkyBoT is a VO service which allows to seek and identify solar system objects (planet, satellites, asteroids, comets) in any field of view at a given epoch (cone-search method). It provides also a solar system object name resolver which convert the name or the designation of solar system objects into their celestial coordinates at a given epoch (resolver method). The SkyBoT service are available through a Web interface and a Web service (SOAP+WSDL+HTTP) which implements the IVOA Simple Cone-Search protocol.
196. Sky Body Tracker - Remote application
ID:
ivo://vopdc.obspm/imcce/skybot/cea
Title:
Sky Body Tracker - Remote application
Short Name:
SkyBoT
Date:
10 Jan 2017
Publisher:
Paris Astronomical Data Centre - IMCCE
Description:
SkyBoT is a VO service which allows to seek and identify solar system objects (planet, satellites, asteroids, comets) in any field of view at a given epoch (cone-search method). It provides also a solar system object name resolver which convert the name or the designation of solar system objects into their celestial coordinates at a given epoch (resolver method). The SkyBoT service are available through a Web interface and a Web service (SOAP+WSDL+HTTP) which implements the IVOA Simple Cone-Search protocol.
197. Small Bodies Near and Far
ID:
ivo://konkoly.hu/sbnaf/q/collection
Title:
Small Bodies Near and Far
Date:
06 Sep 2023 06:07:48
Publisher:
Konkoly Observatory
Description:
SBNAF public database of thermal infrared observations of small bodies in the solar system. Our database collects thermal emission measurements of small Solar Systems targets that are otherwise available in scattered sources and gives a complete description of the data, with all information necessary to perform direct scientific calculations and without the need to access additional, external resources. See the details here: https://ird.konkoly.hu/
198. Solar phase curves of distant icy bodies
ID:
ivo://CDS.VizieR/J/AJ/133/26
Title:
Solar phase curves of distant icy bodies
Short Name:
J/AJ/133/26
Date:
21 Oct 2021
Publisher:
CDS
Description:
We have measured the solar phase curves in B, V, and I for 18 trans-Neptunian objects (TNOs), 7 Centaurs, and Nereid and determined the rotation curves for 10 of these targets. For each body we have made ~100 observations uniformly spread over the entire visible range. We find that all the targets except Nereid have linear phase curves at small phase angles (0.1{deg}-2.0{deg}) with widely varying phase coefficients (0.0-0.4mag/deg). At phase angles of 2{deg}-3{deg}, the Centaurs (54598) Bienor and (32532) Thereus have phase curves that flatten. The recently discovered Pluto-scale bodies (2005 FY9, 2003 EL61, and 2003 UB313 now known as 136199 Eris), like Pluto, have neutral colors compared to most TNOs and small phase coefficients (~0.1mag/deg). Together, these two properties are a likely indication of large TNOs with high-albedo, freshly coated icy surfaces. We find several bodies with significantly wavelength-dependent phase curves. The TNOs (50000) Quaoar, (120348) 2004 TY364, and (47932) 2000 GN171 have unusually high I-band phase coefficients and much lower coefficients in the B and V bands. Their phase coefficients increase in proportion to wavelength by 0.5-0.8mag/deg/um. The phase curves for TNOs with small B-band phase coefficients (<0.1mag/deg) have a similar but weaker wavelength dependence. Coherent backscatter is the likely cause for the wavelength dependence for all these bodies. We see no such dependence for the Centaurs, which have visual albedos of ~0.05.
199. Solar system survey with Spacewatch
ID:
ivo://CDS.VizieR/J/AJ/133/1247
Title:
Solar system survey with Spacewatch
Short Name:
J/AJ/133/1247
Date:
21 Oct 2021
Publisher:
CDS
Description:
We have completed a low-inclination ecliptic survey for distant and slow-moving bright objects in the outer solar system. This survey used data taken over 34 months by the University of Arizona's Spacewatch Project based at Steward Observatory, Kitt Peak. Spacewatch revisits the same sky area every three to seven nights in order to track cohorts of main-belt asteroids. This survey used a multiple-night detection scheme to extend our rate sensitivity to as low as 0.012"/hr. When combined with our plate scale and flux sensitivity (V~21), this survey was sensitive to Mars-sized objects out to 300AU and Jupiter-sized planets out to 1200AU. The survey covered approximately 8000deg^2^ of raw sky, mostly within 10{deg} of the ecliptic but away from the Galactic center. An automated motion detection program was modified for this multinight search and processed approximately 2 terabytes of imagery into motion candidates. This survey discovered 2003 MW12, currently the tenth largest classical Kuiper Belt object. In addition, several known large Kuiper Belt objects and Centaurs were detected, and the detections were used with a model of our observational biases to make population estimates as a check on our survey efficiency. We found no large objects at low inclinations despite having sufficient sensitivity in both flux and rate to see them out as far as 1200AU. For low inclinations, we can rule out more than one to two Pluto-sized objects out to 100AU and one to two Mars-sized objects to 200AU.
200. Spectra of 73 asteroids
ID:
ivo://CDS.VizieR/J/A+A/630/A141
Title:
Spectra of 73 asteroids
Short Name:
J/A+A/630/A141
Date:
21 Oct 2021
Publisher:
CDS
Description:
Several primitive families in the inner region of the main asteroid belt were identified as potential sources for two near-Earth asteroids (NEAs), (101955) Bennu and (162173) Ryugu, targets of the sample-return missions OSIRIS-REx and Hayabusa2, respectively. Four of the families, located at high proper inclinations (i>10{deg}), have not yet been compositionally studied: Klio, Chaldaea, Chimaera, and Svea. We want to characterize and analyze these families within the context of our PRIMitive Asteroid Spectroscopic Survey (PRIMASS), in order to complete the puzzle of the origins of the two NEAs. We obtained visible spectra (0.5-0.9um) of a total of 73 asteroids within the Klio, Chaldaea, Chimaera, and Svea collisional families, using the instrument OSIRIS at the 10.4m Gran Telescopio Canarias. We performed a taxonomical classification of these objects, and an analysis of the possible presence of absorption bands related to aqueous alterations, comparing the results with already studied primitive families in the inner main belt. We present here reflectance spectra for 30 asteroids in the Klio family, 15 in Chaldaea, 20 in Chimaera, and 8 in Svea. We show that Klio, Chaldaea, and Chimaera members have moderately red spectral slopes, with aqueous alteration absorption bands centered around 0.7um, characteristic of the group of primitive families known as Erigone-like. In contrast, Svea shows no 0.7um features, and neutral and blue spectral slopes, and thus is a Polana-like family. While all four families might be related to (162173) Ryugu, the only family studied in this work that might be related to (101955) Bennu is Svea.