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Federico Manzini

Federico Manzini
SAS Stazione Astronomica di Sozzago, Italy · Foam13

PhD

About

65
Publications
5,824
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493
Citations
Citations since 2016
17 Research Items
251 Citations
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050

Publications

Publications (65)
Article
Full-text available
There was an unprecedented opportunity to study the inner dust coma environments, where the dust and gas are not entirely decoupled, of comets 45P/Honda–Mrkos–Pajdus̆áková (45P/HMP) from 2016 December 26 to 2017 March 15, and 46P/Wirtanen from 2018 November 10 to 2019 February 13, both in visible wavelengths. The radial profile slopes of these come...
Preprint
Full-text available
There was an unprecedented opportunity to study the inner dust coma environment, where the dust and gas are not entirely decoupled, of comets 45P/Honda-Mrkos-Pajdu\u{s}\'akov\'a (45P/HMP) from Dec. 26, 2016 - Mar. 15, 2017, and 46P/Wirtanen from Nov. 10, 2018 - Feb. 13, 2019, both in visible wavelengths. The radial profile slopes of these comets we...
Preprint
The recent close approach of comet C/2020 F3 (NEOWISE) allowed us to study the morphology of its inner coma. From the measurement of the dust ejection velocityon spiral structures expanding around the nucleus, we estimated a mean deprojectedexpansion velocity Vd= 1.11+/-0.08 km s^-1. Assuming that a new shell formed after every rotation of the come...
Preprint
Full-text available
Results from the TESS mission showed that previous studies strngly underestimated the number of slow rotators, revealing the importance of studying those asteroids. For most slowly rotating asteroids (P > 12), no spin and shape model is available because of observation selection effects. This hampers determination of their thermal parameters and ac...
Article
The recent, close approach of comet C/2020 F3 (NEOWISE) allowed us to perform a study of the morphology of its inner coma. From the measurement of the dust ejection velocity on spiral structures expanding around the nucleus, we estimated a mean deprojected expansion velocity Vd = 1.11±0.08 km s−1. Assuming that a new shell formed after every rotati...
Article
We processed images taken with the Hubble Space Telescope(HST) to investigate any morphological features in the inner coma suggestive of a peculiar activity on the nucleus of the interstellar comet 2I/Borisov. The coma shows an evident elongation, in the position angle (PA) ∼0−180○ direction, which appears related to the presence of a jet originati...
Article
Context. The near-Earth asteroid (1917) Cuyo was subject to radar and light curve observations during a close approach in 1989, and observed up until 2008. It was selected as one of our ESO Large Programme targets, aimed at observational detections of the Yarkovsky-O’Keefe-Radzievskii-Paddack (YORP) effect through long-term light curve monitoring a...
Preprint
Full-text available
Context. Earlier work suggests that slowly rotating asteroids should have higher thermal inertias than faster rotators because the heat wave penetrates deeper into the sub-surface. However, thermal inertias have been determined mainly for fast rotators due to selection effects in the available photometry used to obtain shape models required for the...
Article
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We studied a sample of 93 asteroid pairs, i.e., pairs of genetically related asteroids that are on highly similar heliocentric orbits. We estimated times elapsed since separation of pair members (i.e., pair age) that are between 7 × 10³ yr and a few 10⁶ yr. With photometric observations, we derived the rotation periods P1 for all the primaries (i.e...
Preprint
Full-text available
We studied 93 asteroid pairs. We estimated times elapsed since separation of pair members that are between 7*10^3 and a few 10^6 yr. We derived the rotation periods for all the primaries and a sample of secondaries. We derived the absolute magnitude differences of the asteroid pairs that provide their mass ratios. We refined their WISE geometric al...
Article
Eos family was created during a catastrophic impact about 1.3 Gyr ago. Rotation states of individual family members contain information about the history of the whole population. We aim to increase the number of asteroid shape models and rotation states within the Eos collision family, as well as to revise previously published shape models from the...
Article
We present physical models, i.e. convex shapes, directions of the rotation axis, and sidereal rotation periods, of 18 asteroids out of which 10 are new models and 8 are refined models based on much larger data sets than in previous work. The models were reconstructed by the lightcurve inversion method from archived publicly available lightcurves an...
Article
Full-text available
CBET 4339 available at Central Bureau for Astronomical Telegrams. We obtained lightcurves of the minor planet (12008) during July 2007, which were typical of binary synchronous asteroids (a regular, smooth, sinusoidal-like curve with two peaks per rotation, but with additional very-fast V-shaped dimming during both minima of brightness). The period...
Article
Full-text available
Applying image processing and enhancement techniques to our CCD images we could investigate the structures of the inner coma of comet C/2013 X1; the dust tail and a broad fan-shaped structure that originated from a different area of the nucleus than the tail were clearly detected. The triangular shape of the fan suggested that it was the result of...
Article
Full-text available
Asteroid modeling efforts in the last decade resulted in a comprehensive dataset of almost 400 convex shape models and their rotation states. This amount already provided a deep insight into physical properties of main-belt asteroids or large collisional families. We aim to increase the number of asteroid shape models and rotation states. Such resu...
Article
Full-text available
Asteroid (234) Barbara is the prototype of a category of asteroids that has been shown to be extremely rich in refractory inclusions, the oldest material ever found in the Solar system. It exhibits several peculiar features, most notably its polarimetric behaviour. In recent years other objects sharing the same property (collectively known as ‘Barb...
Article
Full-text available
MPEC 2014-R69 available at Minor Planet Center.
Article
Full-text available
Extensive observations of comet 260P/McNaught were carried out between August 2012 and January 2013. The images obtained were used to analyze the comet’s inner coma morphology at resolutions ranging from 250 to about 1000 km/pixel. A deep investigation of the dust features in the inner coma allowed us to identify only a single main active source on...
Article
Full-text available
The larger number of models of asteroid shapes and their rotational states derived by the lightcurve inversion give us better insight into both the nature of individual objects and the whole asteroid population. With a larger statistical sample we can study the physical properties of asteroid populations, such as main-belt asteroids or individual a...
Article
Full-text available
proprio quello più adatto alla rubrica, tuttavia tutto ha origine da questo bellissi-mo oggetto che nel catalogo di Messier si trova al numero 45", mi scrivono Paolo Lo-renzi (lorenzi@lorenzisrl.com) e Giovanni Bernardi. È indiscutibile che -assieme alla galassia di Andromeda (M31) e alla grande nebulosa di Orione (M42) – le Pleiadi rientrino fra g...
Article
Context. The larger number of models of asteroid shapes and their rotational states derived by the lightcurve inversion give us better insight into both the nature of individual objects and the whole asteroid population. With a larger statistical sample we can study the physical properties of asteroid populations, such as main-belt asteroids or ind...
Article
Full-text available
Context. Recent studies have uncovered evidence that the statistical properties of asteroids' physical parameters are a fundamental source of information on the physics of their collisions and evolution. The analysis of the spin rates and spin vector distributions helps us to understand the role of various known and new effects. The alignment of sp...
Article
Full-text available
Context. The shapes and spin states of asteroids observed with photometric techniques can be reconstructed using the lightcurve inversion method. The resultant models can then be confirmed or exploited further by other techniques, such as adaptive optics, radar, thermal infrared, stellar occultations, or space probe imaging. Aims. During our ongoin...
Article
The files contain asteroid brightness, aspect data and observing information for corresponding date. These files were used for obtaining synodic period rotation. Individual lightcurves within a files are identified with a light curve number, all lightcurves are relative. (2 data files).
Article
Results are based on 10-years long observations of the Flora family asteroids. The spin rates distribution suggests young age of the family. We present the possible influence of YORP on spin vectors and Yarkovsky on their current orbital location.
Article
Full-text available
denso da contrastare nettamente sullo sfon-do (come invece fanno tante altre nebulose oscure). " Pertanto, per acquisire una quantità appe-na suffi ciente di segnale, sono stato costret-to a integrare per circa 24 ore complessive e per evidenziarlo ho dovuto sottoporre i dati a una lunga e particolarmente attenta Quante volte ho stimolato i lettori...
Article
Full-text available
Extensive observations of comet C/2004 Q2 (Machholz) were carried out between August 2004 and May 2005. The images obtained were used to investigate the comet's inner coma features at resolutions between 350 and 1500 km/pixel. A photometric analysis of the dust outflowing from the comet's nucleus and the study of the motion of the morphological str...
Article
Full-text available
di nuove possibilità. In questo caso, la cu-riosità non è da intendersi come " peccato " , ma come virtù, come energia che stimola a guardare avanti, a scandagliare la rete alla ricerca di nuove idee e tecniche aggiornate di elaborazione. " Sul sito di Jay GaBany (www.cosmoto-graphy.com), astrofotografo di lunghissima esperienza, c' è una ripresa d...
Article
Full-text available
magini che vi sono salvate sono fra le migliori che io abbia notato (Figure 1, 2 e 3). Scrive Rosario: " … non so raccontarle la mia felicità nel vedere pub-blicata la mia fotografi a (Nuovo Orione n. 212, gennaio 2010); alle soglie dei cinquanta anni, mi riscopro un tantino vane-sio, ma non mi dispiace: nonostante la buona at-trezzatura, un' esper...
Article
CBET 2698 available at Central Bureau for Astronomical Telegrams.
Article
Full-text available
luglio 2010 di Nuovo Orione. " Ho ripreso il disegno (in redazione abbia-mo trovato una immagine del disegno ori-ginale di Schiaparelli, ndr) e l'ho incollato vicino alla mia ripresa che era stata eseguita con un telescopio Schmidt-Cassegrain da 235 mm a feq/40 con una webcam Philips Toucam Pro, dalla periferia di Milano, un sito quasi nelle stesse...
Article
IAUC 9135 available at Central Bureau for Astronomical Telegrams.
Article
CBET 2193 available at Central Bureau for Astronomical Telegrams. Bibtex entry for this abstract Preferred format for this abstract (see Preferences) Find Similar Abstracts: Use: Authors Objects SIMBAD NED LPI IAU Title Abstract Text Return: Query Results Return items starting with number Query Form Database: Astronomy Physics arXiv e-prints
Article
We report on the results of a 6-month photometric study of the main-belt binary C-type Asteroid 121 Hermione, performed during its 2007 opposition. We took advantage of the rare observational opportunity afforded by one of the annual equinoxes of Hermione occurring close to its opposition in June 2007. The equinox provides an edge-on aspect for an...
Article
Full-text available
We report the detection of transits by the 3.1 M_Jup companion to the V=8.17 G0V star HD 17156. The transit was observed by three independant observers on Sept. 9/10, 2007 (two in central Italy and one in the Canary Islands), who obtained detections at confidence levels of 3.0 sigma, 5.3 sigma, and 7.9 sigma, respectively. The observations were car...
Article
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High quality CCD images allowed the identification of several morphological structures near the nuclear zone of comet Ikeya-Zhang. The interpretation of these structures led to an estimate of its rotation period.
Article
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Aims.We present physical models of ten asteroids obtained by means of lightcurve inversion. A substantial part of the photometric data was observed by amateur astronomers. We emphasize the importance of a coordinated network of observers that will be of extreme importance for future all-sky asteroid photometric surveys.Methods.The lightcurve invers...
Article
The aristocratic Isimbardi Palace in Milan, seat of the Province Administration, preserves two rare and antique globes of considerable size (⌀ 70 cm), which have basically been ignored till now: a celestial sphere made in 1676 and a terrestrial sphere dated 1688, both manufactured in Rome in Giovanni Giacomo de Rossi's renowned workshop. The two gl...
Article
Full-text available
Context. Aims.We present evidence that four minor planets of the main belt are binary systems. Methods.These discoveries are based on CCD photometric measurements made by many observers coordinated in a network of observatories. Results.Orbital and physical properties are derived from a total of 134 partial light curves involving 26 stations. (854)...
Article
IAUC 8588 available at Central Bureau for Astronomical Telegrams.
Article
Federico Manzini (SAS obs., IAUC A12) report the observation by Alessandro Dimai, Cortina (Italy), and Marco Migliardi, Tour Tour (France), of an apparent SN in NGC 2276 (m. = +17.1), on four unfiltered CCD images taken on 2005 august 25.1 (lim. magn. about +19,5) with the 0.5-m "Ullrich" telescope of the Col Druscié observatory (Cortina d'Ampezzo,...
Article
Federico Manzini report the discovery by Alessandro Dimai, on behalf of the CROSS Program (cf. IAUC 7373) with the 0.5-m "Ullrich" telescope of the Col Druscié observatory (Cortina d'Ampezzo- Italy), of an apparent supernova in IC 178 at a magnitude of 15.5 about; two unfiltered CCD images taken on 2005 July 15.05 (limiting magnitude about 19.0) sh...
Article
Marco Migliardi, Col Drusciè Observatory (Italy), report the discovery of an apparent nova in M31 (NGC 224) on behalf of the CROSS Program with the 0.5-m telescope of the Col Drusciè Observatory. The possible nova was found on unfiltered CCD images (Kodak KAF-1602E CCD) taken on February 18.77 (mag. 17.7), and confirmed by other 5 images, last take...
Article
IAUC 8452 available at Central Bureau for Astronomical Telegrams.
Article
We identified four main morphological structures near the nuclear region of the comet Ikeya-Zhang (I-Z): halons, jets, shells and spirals. Their physical interpretation was derived from a comparison with similar structures found in the comet Hale-Bopp. This work enabled us to deduce some important dynamical parameters of I-Z nucleus.
Article
Full-text available
Using a CCD camera attached to the 0.335 m and 0.20 m reflectors of S.A.S. Observatory (Novara, Italy), we followed the linear jets and shells of comet Hale–Bopp between May 1996 and May 1997. In addition to confirming the model of Sekanina and Bohenhardt (1997), the study of the linear jets provided indications concerning the orientation of the co...
Article
Full-text available
Hundreds of high quality CCD images obtained by the GAT group with the 33.5 cm reflector of the Sozzago Astronomical Observatory (SAS) provide a detailed insight into the temporal evolution of comet Hale-Bopp. The images cover the time period from May 1996 until May 1997 and allowed us to analyze various near nucleus phenomena. Among them are jet s...
Article
A large amount of CO has been detected above many SL9/Jupiter impacts. This gas was never detected before the collision. So, in our opinion, CO was released from a parent compound during the collision. We identify this compound as POM (polyoxymethylene), a formaldehyde (HCHO) polymer that, when suddenly heated, reformes monomeric HCHO. At temperatu...
Article
CCD images of SL-9/Jupiter impacts were taken on July '94 by 1.4 m Ruths Reflector at Merate Observatory and on August '94 by C14 Reflector at Legnano Observatory. A comparison of images obtained almost 10 days apart, clearly shows a spreading in East/West direction of the black plumes in the lower atmosphere but, also, a displacement of the upper...
Article
The author paints a fascinating picture of the life of an eighteenth century French astronomer.
Article
A large amount of CO has been detected over many SL-9/Jupiter impacts. This gas was never detected before the collision, so here the authors present a chemical mechanism about the formation of CO from a parent compound; they identify it in POM (polyoxymethilene), a well known HCHO polymer discovered in Halley nucleus.
Article
Many new constellation figures have been proposed over the ages. Not all have been accepted, and here the authors examine some of the constellations which have not survived.
Article
Full-text available
The minor planet (1139) Atami showed mutual eclipses features on its light curves during its 2005 opposition. Photometric and radar analysis reveal the binarity of this system composed by two bodies of the same size (7.4x4.4x4.4 km 15%) separated by about 17.7 1.1 km. Rotations and revolutions are synchronous and the period is T =1.145 0.002 days....
Article
CBET 430 available at Central Bureau for Astronomical Telegrams.
Article
CBET 591 available at Central Bureau for Astronomical Telegrams.
Article
IAUC 8315 available at Central Bureau for Astronomical Telegrams.

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