introduction4 data acquisition and analysis8 results17 conclusion24 asteroid photometry group, vsa...
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• Introduction 4
• Data acquisition and analysis 8
• Results 17
• Conclusion 24
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• 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
3ASTEROID PHOTOMETRY GROUP, VSA 2011
Messier 8, 150 sec RGB composite, 2011-08-04, San Pedro de Atacama
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• asteriods - small celestial bodies that are orbiting around the Sun
• asteroid belt – between Mars and Jupiter
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• divided in about 35 groups by differences in their orbits
• NEO (Near Earth Object)
• MBA (Main Belt Asteroid)
• Trojans
• Hildas
• TNO
• …
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• 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
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• 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
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ASTEROID PHOTOMETRY GROUP, VSA 2011 11San 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
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reduced frame
dark frame
raw frame
flat field
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• Aug 10/11/17, 2011
• Period: 3,39 ± 0,01h
Mag
nitu
de c
hang
e
Synodic phase
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Synodic phase
• Aug 10/11/12, 2011
• Period: 15.73 ± 0.77 h
Mag
nitu
de c
hang
e
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• Aug 11/12/13/14 2011.
• Period: 16,31 ± 0,54 h
Mag
nitu
de c
hang
e
Synodic phase
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• Jul 25/26/28, 2011Jul 25/26/28, 2011
• Period: 16.3 ± 0.1hPeriod: 16.3 ± 0.1h
Synodic phase
Mag
nitu
de c
hang
e
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ASTEROID PHOTOMETRY GROUP, VSA 2011
213 P/Van Ness
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• 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
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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 !!!
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CONTACTS:Danko Marušić – [email protected] Cikota – [email protected] Racz – [email protected] Molnar – [email protected] Šola - [email protected] Perović – [email protected]
FINAL PRESENTATION ON VSA 201117. 08. 2011.VISNJAN