2. Introduction4 Data acquisition and analysis8 Results17 Conclusion24 ASTEROID PHOTOMETRY GROUP, VSA 2011 2

3. MAIN GOALS: determination of asteroids’ physical characteristics - rotation periods and shapes SIDE GOALS : using a remote telescope observation planning and candidate selection CCD imaging techniques and image reduction dynamics of minor bodies of the Solar system astrometry of comets and reporting to the MPC familiarising with the southern sky 3 ASTEROID PHOTOMETRY GROUP, VSA 2011 Messier 8, 150 sec RGB composite, 2011-08-04, San Pedro de Atacama

4. asteriods - small celestial bodies that are orbiting around the Sun asteroid belt – between Mars and Jupiter ASTEROID PHOTOMETRY GROUP, VSA 2011 4

5. divided in about 35 groups by differences in their orbits NEO (Near Earth Object) MBA (Main Belt Asteroid) Trojans Hildas TNO … ASTEROID PHOTOMETRY GROUP, VSA 2011 5

6. ASTROMETRY = precise measurements of the positions and movements of celestial bodies PHOTOMETRY = measuring luminous intensity using photometry we can find out shape of the asteroid, rotation period and constitution ASTEROID PHOTOMETRY GROUP, VSA 2011 6

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9. online database of all minor bodies of the Solar system it is used for reporting new asteroid data and contains all orbital informations about known objects in our Solar system ASTEROID PHOTOMETRY GROUP, VSA 2011 9

11. 11 San Pedro de Atacama Instrument: ASH2 D = 407 mm F = 1510 mm, f/3,7 Mount: AP1200 CCD: STL11000XMC1 Field of view: ~ 1º×1,5º Site: San Pedro de Atacama, Chile Distance from Višnjan: ~11300 km Instrument: ASH2 D = 407 mm F = 1510 mm, f/3,7 Mount: AP1200 CCD: STL11000XMC1 Field of view: ~ 1º×1,5º Site: San Pedro de Atacama, Chile Distance from Višnjan: ~11300 km

12. ASTEROID PHOTOMETRY GROUP, VSA 2011 12

13. ASTEROID PHOTOMETRY GROUP, VSA 2011 13

14. ASTEROID PHOTOMETRY GROUP, VSA 2011 14 reduced frame dark frame raw frame flat field

15. ASTEROID PHOTOMETRY GROUP, VSA 2011 15

16. ASTEROID PHOTOMETRY GROUP, VSA 2011 16

17. ASTEROID PHOTOMETRY GROUP, VSA 2011 17 Aug 10/11/17, 2011 Period: 3,39 ± 0,01h Magnitude change Synodic phase

18. ASTEROID PHOTOMETRY GROUP, VSA 2011 18 Synodic phase Aug 10/11/12, 2011 Period: 15.73 ± 0.77 h Magnitude change

19. ASTEROID PHOTOMETRY GROUP, VSA 2011 19 Aug 11/12/13/14 2011. Period: 16,31 ± 0,54 h Magnitude change Synodic phase

20. ASTEROID PHOTOMETRY GROUP, VSA 2011 20 Jul 25/26/28, 2011 Jul 25/26/28, 2011 Period: 16.3 ± 0.1h Period: 16.3 ± 0.1h Synodic phaseMagnitude change

21. ASTEROID PHOTOMETRY GROUP, VSA 2011 213 P/Van Ness

22. ASTEROID PHOTOMETRY GROUP, VSA 2011

23. observed for 7 clear nights effective exposure time: 92 430 s = 154,5 min = 25,7 h total amount data: 29,5 GB = 1027 images made light curves and determined rotation periods of 4 asteroids done astrometry of 3 asteroids and 1 comet ASTEROID PHOTOMETRY GROUP, VSA 2011 23

24. We have learned about asteroids controling the telescope remotely photometric and astrometric analysing the data We have succeeded to determine the rotation period of asteroids The moon was the main problem of our observing !!! ASTEROID PHOTOMETRY GROUP, VSA 2011 24

25. ASTEROID PHOTOMETRY GROUP, VSA 2011 25 CONTACTS: Danko Marušić – matesonik@yahoo.com Stefan Cikota – stefan.cikota@gmail.com Rajna Racz – rajna-chibimoon@hotmail.com Klaudija Molnar – klaudija.molnar@gmail.com Mateja Šola - mateja.teja.sola@gmail.com Vasilije Perović – vasko1996@gmail.com FINAL PRESENTATION ON VSA 2011 17. 08. 2011. VISNJAN