Bucharest Science Festival 2019

Bucharest Science Festival opened the gates of the Astronomical Institute of the Romanian Academy for the general public, on the 27th of September 2019. The number of visitors exceeded any estimations being around 500 adults and children.

The Planetarium Hall was permanently full of people eager to learn who participated to several presentations with PowerPoint, video or specialized software support. The academic staff and astronomy teachers were: dr. Diana Beşliu-Ionescu (AIRA), Daniel Berteşteanu (Bucharest Astroclub), Florin Zăinescu (University of Bucharest).

A special moment of the evening was the live connection with France, as dr. Mirel Bîrlan (AIRA) interacted with the public through Skype directly from Paris Astronomical Observatory.

The activities included guided tours in the museum halls of the Institute - the Meridian Hall and the Equatorial Dome. There, some of the most important and spectacular astronomical instruments of Romania are preserved for future generations and they are used today for educational purposes.The tour guides - Sorin Marin (AIRA), Octavian Blagoi (AIRA) and Marian Naiman (Bucharest Astroclub) received many questions during the whole event, especially coming from the younger friends of astronomy and they answered to all of them.

The members of Bucharest Astroclub took part in organizing the BSF 2019 event. They displayed with great openness their instruments - several telescopes and their accessories and kindly instructed the public on how to watch the planets and the stars through them.

During the presentation of Daniel Berteşteanu, the public received special glasses for spectroscopy aplications.
The interstellar comet C/2019 Q4 (Borisov) observed from Berthelot Observatory

First Interstellar Comet

Using Berthelot Observatory in remote mode we imaged the first interstellar comet - C/2019 Q4 (Borisov) . Based on the current arc, the comet is on a hyperbolic orbit with an eccentricity of almost 3. The comet will reach perihelion on December 7, 2019. Berthelot Observatory will continue to monitor this objects in the following weeks. Contact: sonka (at) astro.ro.

Romanian Astronomical Journal

Romanian Astronomical Journal is an international journal covering the fields of:

  • Astronomy
  • Celestial Mechanics
  • Stellar Astrophysics
  • Solar Physics and Heliosphere
  • Extragalactic astronomy and cosmology
  • History of the Astronomy and astronomy in culture
  • Space sciences

  • Romanian Astronomical Journal appears twice a year since 1991 and three times a year since 2015. This Journal publishes original peer reviewed articles, brief reports, special communications, theoretical and observational works. You are invited to submit your original research to roaj.:at:.astro.ro

    Ownership and management:
    Romanian Astronomical Journal is part of the Romanian Academy series of journals and it is published in hard copy by the Romanian Academy Publishing House. Subscription information could be found by contacting the journal at roaj.:at:.astro.ro. The publication of the online numbers is under the responsibility of the Astronomical Institute of the Romanian Academy, via the journal webpage

    Images used for Gault photometry were obtained in four nights of observations with the Romanian infrastructure. The asteroid is the point-like object in images that leaves behind a trail

    The mysterious active asteroid Gault

    Asteroid (6478) Gault is a mysterious object; although it is in the Main Belt of asteroids, this object presents a cometary activity. During 2018 and 2019 astronomers detected a tail of matter in the asteroid's motion around the Sun, most likely due to the sublimation of light elements in its composition. The phenomenon involves the particles of dust and gas that reflect sunlight.

    An international team that includes researchers from MIT-US, Astronomical Institute of the Romanian Academy, Weizmann Institute of Science in Israel, Observatoire de Paris-France, Lowell Observatory, Institute for Astronomy in Hawaii, and Northern Arizona University, has monitored the asteroid and obtained spectral and photometric data of Gault, between March and April 2019. Near-infrared spectral observations were performed in late March and early April 2019 with the 3 m diameter IRTF (NASA) telescope located in Mauna Kea-Hawaii; the spectral data were corroborated with the photometric data (Figure 1) obtained with the NEEMO-T05 telescope operated by the Astronomical Institute of the Romanian Academy.

    Observational data confirm that the surface of the object contains minerals rich in silicium, most likely similar to the mineralogical composition of the asteroid family (25) Phocaea. The spectral data show variations of the spectral slope, decorrelated by a possible burst in object's cometary activity. This aspect can be explained by observing a new layer, unaltered by space weather, predominantly present on the surface of the object after the initial dust layer was entrained in the tail developed by the asteroid.

    These results were recently published in the prestigious Astrophysical Journal Letters.

    M. Marsset, F. DeMeo, A. Sonka, et al., "Active asteroid (6478) Gault: a blue Q-type surface below the dust?” accepted in Astrophysical Journal Letters. Contacts: Adrian Sonka, Astronomical Institute of the Romanian Academy, Mirel Birlan, Paris Observatory.


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