Photometry of asteroids (5141), (43032), (85953), (259221), and (363599) observed at Pic du Midi Observatory

Dumitru, B. A.; Birlan, Mirel; Şonka, A.; Colas, François; Nedelcu, A.

doi:10.1002/asna.201813463

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…Stricto sensu, the colors of SSOs are observable and not derived properties. Nevertheless, we compiled the colors of SSOs in SsODNet.dataCloud, with the same rationale as for derived properties: many colors are available but spread over many studies (e.g., Dandy et al, 2003;Snodgrass et al, 2010;Dumitru et al, 2018) and they are usually not in machine-readable format. Furthermore, colors can be used for taxonomic determination (Carvano et al, 2010;DeMeo & Carry, 2013).…”

Section: Colorsmentioning

confidence: 99%

SsODNet: Solar system Open Database Network

Berthier

Carry

Mahlke

et al. 2023

A&A

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Context. The sample of Solar system objects has dramatically increased over the last decade. The number of measured properties (e.g., diameter, taxonomy, rotation period, thermal inertia, etc.) has expanded even more quickly. However, this wealth of information is spread over a myriad of studies, with different designations reported per object. Aims. We provide a solution to the identification of Solar system objects based on any of their multiple names or designations. We also compile and rationalize their properties to provide an easy access to them. We aim to continuously update the database as new measurements become available. Methods. We built a Web Service, SsODNet, which offers four access points, each corresponding to an identified necessity in the community: name resolution (quaero), compilation of a large corpus of properties (dataCloud), determination of the best estimate among compiled values (ssoCard), and a statistical description of the population (ssoBFT). Results. The SsODNet interfaces are fully operational and freely accessible to everyone. The name resolver quaero translates any of the ∼5.3 million designations of objects into their current and official designation. The dataCloud includes about 105 million parameters (osculating and proper elements, pair and family membership, diameter, albedo, mass, density, rotation period, spin coordinates, phase function parameters, colors, taxonomy, thermal inertia, and Yarkovsky drift) from over 3,000 articles (updated continuously). For each of the known asteroids and dwarf planets (∼1.2 million), a ssoCard that provides a single best-estimate for each parameter is available. The SsODNet service provides these resources in a fraction of second upon query. Finally, the extensive ssoBFT table compiles all the best estimates in a single table for population-wide studies.

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Section: Colorsmentioning

confidence: 99%

SsODNet: Solar system Open Database Network

Berthier

Carry

Mahlke

et al. 2023

A&A

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“…A 2 × 2 binning resulted in a pixel scale of 0.77 pxl −1 . Observations at the Pic du Midi observatory were carried out on the 1-m telescope with an iKon-L Andor CCD camera with a 2k × 2k E2V detector (Dumitru et al 2018). At the OHP, the observations were made using broadband BVRI filters, whereas at the Pic du Midi Sloan griz filters were used.…”

Section: Observations and Data Reductionmentioning

confidence: 99%

Photometric survey of 55 near-earth asteroids

Hromakina

Birlan

Fulchignoni

et al. 2021

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Context. Near-earth objects (NEOs), thanks to their proximity, provide a unique opportunity to investigate asteroids with diameters down to dozens of meters. The study of NEOs is also important because of their potential hazard to the Earth. The investigation of small NEOs is challenging from Earth as they are observable only for a short time following their discovery and can sometimes only be reached again years or decades later. Aims. We aim to derive the visible colors of NEOs and perform an initial taxonomic classification with a main focus on smaller objects and recent discoveries. Methods. Photometric observations were performed using the 1.2 m telescope at the Haute-Provence observatory and the 1.0 m telescope at the Pic du Midi observatory in broadband Johnson-Cousins and Sloan photometric systems. Results. We present new photometric observations for 55 NEOs. Our taxonomic classification shows that almost half (43%) of the objects in our sample are classified as S+Q-complex members, 19% as X-complex, 16% as C-complex, 12% as D-types, and finally 6% and 4% as A- and V-types, respectively. The distribution of the observed objects with H > 19 and H ≤ 19 remains almost the same. However, the majority of the objects in our dataset with D < 500 m belong to the “silicate” group, which is probably a result of an observational bias towards brighter and more accessible objects. “Carbonaceous” objects are predominant among those with a Jovian Tisserand parameter of Tj < 3. These bodies could be dormant or extinct comets. The median values of the absolute magnitude for “carbonaceous” and “silicate” groups are H = 18.10 ± 0.95 and H = 19.50 ± 1.20, whereas the estimated median diameters are D = 1219 ± 729 m and D = 344 ± 226 m, respectively. “Silicate” objects have a much lower median Earth’s minimum orbit intersection distance (MOID) and a somewhat lower orbital inclination in comparison to “carbonaceous” objects. About half of the observed objects are potentially hazardous asteroids and are mostly (almost 65%) represented by “silicate” objects.

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NEOROCKS color survey: Final results

Birlan,

Barucci,

Belskaya

et al. 2024

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Near-Earth objects (NEOs) are the most accessible small Solar System bodies by both spacecrafts and ground-based telescopes. Close encounters of these objects with Earth represent opportunities to characterize their physical and mineralogical properties. They are also a constant threat to humanity due to possible impact events with Earth. In this context, the NEOROCKS project has been financed by the European Union's Horizon 2020 research and innovation program. We present the final results on photometry of the NEOROCKS project, with the aim of extending the dataset of surface colors for small NEOs with unknown properties and, when possible, characterizing newly discovered NEOs. Photometric observations were performed using the 1.2m telescope at the Haute-Provence observatory (in France) in the BVRI filters of the Johnson-Cousins photometric systems between May 2022 and June 2023. The stability and dynamics of objects from the NEOROCKS database was investigated by numerical integration. We obtained new surface colors for 83 NEOs. Overall, the NEOROCKS color database contains 170 objects. The majority of the objects in the dataset with diameters D<500m belong to a group of silicate bodies. We estimated the unbalanced percentage between S- and C-type objects as an observational bias due to reflective proprieties of the surface of objects. The average of Lyapunov time of about 100 years is evidence of highly chaotic orbits of objects from the color database of NEOROCKS. Asteroid 2011 OL51 has a reasonable probability of being a parent body contributor to the October Capricornidis meteor shower. Asteroids 2004 HK33, 2022 VV (D-type), 2003 WR21, and 2017 SE1 (A-type) belong to end-member classes and have Delta V<7km/s; thus, they are possible candidates for in situ investigations.

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Photometry of asteroids (5141), (43032), (85953), (259221), and (363599) observed at Pic du Midi Observatory

Cited by 4 publications

References 31 publications

SsODNet: Solar system Open Database Network

SsODNet: Solar system Open Database Network

Photometric survey of 55 near-earth asteroids

NEOROCKS color survey: Final results

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