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  1.  Evgeni Semkov (IANAO) - chairperson
  2.  Luka Popovic (AOB) - co-chairperson
  3.  Renada Konstantinova-Antova (IANAO)
  4.  Lubomir Iliev (IANAO)
  5.  Kamen Kozarev (IANAO)
  6.  Dragomir Marchev (ShU)
  7.  Kostadinka Koleva (SRTI)
  8.  Petko Nedialkov (SU)
  9.  Rumen Bachev (IANAO)
  10.  Nikola Petrov (IANAO)
  11.  Luba Slavcheva-Mihova (IANAO)
  12.  Ognyan Kounchev (IMI)
  13.  Zoran Simic (AOB)
  14.  Nenad Sakan (IPhB)
  15.  Rade Pavlovic (AOB)
  16.  Milan Stojanovic (AOB)
  17.  Oliver Vince (AOB)
  18.  Dejan Uroshevic (UB)
  19.  Andjelka Kovacevic (UB)
  20.  Bojan Arbutina (UB)
  21.  Milica Vucetic (UB)
  22.  Gordana Apostolovksa (US)
  23.  Milan Dimitrijevic (Member Emeritus)
  24.  Milcho Tsvetkov (Member Emeritus)


  •   Evgeni Semkov (IANAO)   
  •   Georgi Latev (IANAO)
  •   Momchil Dechev (IANAO)   
  •   Dimitar Sotirov (IANAO)   
  •   Luba Dankova (IANAO)
  •   Asen Mutafov (IANAO)   

IANAO - Institute of Astronomy with National Astronomical Observatory, Bulgarian Academy of Sciences
AOB - Astronomical Observatory, Belgrade
ShU - Shumen University
SRTI - Space Research and Technology Institute, Bulgarian Academy of Sciences
IPhB - Institute of Physics, Belgrade
SU - Sofia University
UB - University of Belgrade
IMI - Institute of Mathematics and Informatics, Bulgarian Academy of Sciences
US - Ss. Cyril and Methodius University in Skopje



Velingrad location The Conference will take place at hotel "Zdravets" (https://www.hotel-zdravets.com/)

Velingrad has many hotels and guest houses. Some hotels near the conference are:

Velingrad (Bulgarian: Велинград [ˈvɛlinɡrat]) is a town in Pazardzhik Province, Southern Bulgaria, located at the western end of Chepino Valley, part of the Rhodope Mountains. It is the administrative center of the homonymous Velingrad Municipality and one of the most popular Bulgarian balneological resorts.
Velingrad is situated at 750–850 m above sea level. Summers are warm and winters are cold. The average annual temperature is 10 °C, while the average July temperature is 19 °C. The annual duration of sunshine is about 2,000 hours. The relative air humidity ranges from 65 to 75%. Surrounded by age-old pine tree woods, the town favors abundant sunshine.
There are more than 90 mineral water springs with curative and preventive properties in and around the town. The mineral waters (from springs and wells) vary considerably in temperature, mineralization, radon, silicic acid and fluorine content, and are suitable for treatment of a wide range of diseases. 9000 litres of water per minute spring from the five thermal and mineral deposits in Ladzhene, Kamenitsa, Chepino, Rakitovo and Kostandovo. Together with the numerous mineral waters, Velingrad boasts another natural phenomenon as well — the Kleptuza, the biggest Karst spring in Bulgaria, with an average discharge of 1200 litres of ice-cold water per second.
The natural environment, mineral springs and favourable for the treatment of a number of diseases climatic features make Velingrad a tourist destination of Bulgarian and foreign citizens.[citation needed] On the territory of the city there are 3 sanatoriums, over 60 hotels, 140 restaurants and entertainment. 6 holiday complexes have been modernised, offering all types of balneological services. Public mineral baths have been improved and 22 outdoor and indoor mineral pools have been built.

National currency

Bulgarian lev (pl. leva). Coins with smaller denomination are called "stotinki" (100 stotinki = 1 lev). There are banknotes of 5, 10, 20, 50, 100 leva. and coins of 1, 2, 5, 10, 20 and 50 stotinki.

More here...


Do not exchange money in the streets or outside banks and currency exchange offices despite the advantageous rate offered.

Climate in Bulgaria

Average min and max temperatures in Velingrad, Bulgaria

October is a colorful month, with mild weather in Bulgaria. The peak fall foliage showcases brilliant hues all over the landscape during the 11-hour days. The daily sunshine lasts for an average of 5.5 hours, as the daylight fades gradually. October is wetter in the south compared to the north but does not yield more than 50.8mm (2") of precipitation. The first half of October is warm and bright, with clear skies for 62% of the time.

Visa Requirements

gerb Since 1 January 2007 the Republic of Bulgaria has been applying the European Union’s Common Visa Policy, subject to the terms of the Accession Treaty.
More info...


List of Participants

List of Participants in PDF --> Download



Program can be downloaded HERE (program.pdf)

Posters will be presented only electronically on poster screens. DO NOT PRINT POSTERS!
Poster format - PDF (max dimensions - A1 594 × 841 mm)


Day 1 - 03.10.2022

Evgeni Semkov - The new 1.5-meter robotic telescope at the Rozhen Observatory
Rumen Bachev - Recent achievements at Belogradchik Observatory
Goran Damljanovic - Gaia Alerts and Bulgarian-Serbian cooperation from 2014 to 2022
Oliver Vince - Satus of Vidojevica 20 years after its founding
Vladimir Bozhilov - The „Space Education for Bulgaria” (SpaceEdu4BG) Project
Alok Gupta - Multi-wavelength variability and QPOs in Blazars
Miljana Jovanović - Comparison and control stars around quasars suitable for the ICRF – GAIA CRF link
Milen Minev - A photometric study of high-redshift quasars
Stanislav Milošević - Dark matter haloes in galaxy mergers
Anatoly Miroshnichenko - B[e] star CI Cam in the optical range
Krystian Ilkiewicz - Flickering in polars
Svetla Tsvetkova - The large-scale magnetic fields of the M dwarf double-line spectroscopic binary FK Aq

Day 2 - 04.10.2022

Sava Donkov - Thermodynamics of fluid elements in the context of saturated isothermal turbulence in Molecular Clouds
Milan Dimitrijević - Stark broadening of Fe XXV lines for neutron stars and their environment investigations
Magdalena Christova - Analysis of calculated Stark broadening parameters of singly ionized silicon lines
Svetoslav Botev - Properties of Milky way globular clusters associated with X-ray sources
Bojan Arbutina - Low-mass Contact Close Binary Systems and Their Stability
Krasimira Yankova - The active zone mobility in a magnetized disk with advection
Dejan Urosevic - Supernovae throughout the history
Renada Konstantinova-Antova - Magnetic fields and activity in AGB and other evolved giant stars
Kiril Stoyanov - Optical spectroscopy and X-ray observations of the D-type symbiotic star EF Aql
Zoran Simić - Impact broadening parameters for some transition metals in A type star
Petia Yanchulova - Dust Extinction, 3D Structure, and Stellar Properties from Resolved Stars in Nearby Galaxies
Lubomir Iliev - The carousel of cycles of a prototype Be/shell star Pleione
Svetlana Boeva - Negative superhumps in cataclysmic variables
Vladislav Marchev - For optical flickering in symbiotic star MWC 560

Day 3 - 05.10.2022

Ognyan Kounchev - Generalized Smoothing splines for data analysis in Astronomy
Stefan Stefanov - The tilted accretion disc of LS Cam
Daniela Kirilova - Several cosmological nucleosynthesis constraints on neutrino and new physics
Milica Vučetić - Supernova remnants - perspective from NAO Rozhen
Todor Veltchev - Power-law tails of the density distribution in star-forming clouds: possible effects of rotation and/or thermodynamics

Day 4 - 06.10.2022

Rositsa Miteva - Solar radio bursts associated with in situ observedenergetic protons and electrons
Nikola Petrov - Optical observations of the solar chromosphere by NAO Rozhen
Tsvetan Tsvetkov - Online Catalog of Solar Activity Events of Solar Cycle 24
Yovelina Zinkova - Daytime sky polarization effect
Galin Borisov - Physical and dynamical properties of selected Earth co-orbital asteroids
Elena Vchkova-Bebekovska - Modeling asteroid shapes using BNAO Rozhen and AS Vidojevica photometric data in combination with sparse data
Rumen Shkevov - Wave-particle resonant interactions in heliosphere periphery
Yavor Chapanov - Wavelet Coherence of Total Solar Irradiance and Atlantic Climate
Rumen G. Bogdanovski - INDIGO framework
Grozdan Shirov - Analysis of meteorological observations for Bulgaria (1905-2022)
Tanyu Bonev - Mankind’s first attempt to change the orbit of an asteroid


Meeting Photo

Abstract Book

Abstract Book can be downloaded here: Abstracts (pdf).

Contact Us

Please, send all your questions at 13bsac@astro.bas.bg


The Conference Logo was kindly provided by Zoran Simic. Some Unsplash images are used in this design.