Introduction4 Data acquisition and analysis8 Results17 Conclusion24 ASTEROID PHOTOMETRY GROUP, VSA...
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Transcript of Introduction4 Data acquisition and analysis8 Results17 Conclusion24 ASTEROID PHOTOMETRY GROUP, VSA...
• Introduction 4
• Data acquisition and analysis 8
• Results 17
• Conclusion 24
ASTEROID PHOTOMETRY GROUP, VSA 2011 2
• 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
• asteriods - small celestial bodies that are orbiting around the Sun
• asteroid belt – between Mars and Jupiter
ASTEROID PHOTOMETRY GROUP, VSA 2011 4
• 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
• 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
ASTEROID PHOTOMETRY GROUP, VSA 2011 7
ASTEROID PHOTOMETRY GROUP, VSA 2011 8
• 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
ASTEROID PHOTOMETRY GROUP, VSA 2011
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
ASTEROID PHOTOMETRY GROUP, VSA 2011 12
ASTEROID PHOTOMETRY GROUP, VSA 2011 13
ASTEROID PHOTOMETRY GROUP, VSA 2011 14
reduced frame
dark frame
raw frame
flat field
ASTEROID PHOTOMETRY GROUP, VSA 2011 15
ASTEROID PHOTOMETRY GROUP, VSA 2011 16
ASTEROID PHOTOMETRY GROUP, VSA 2011 17
• Aug 10/11/17, 2011
• Period: 3,39 ± 0,01h
Mag
nitu
de c
hang
e
Synodic phase
ASTEROID PHOTOMETRY GROUP, VSA 2011 18
Synodic phase
• Aug 10/11/12, 2011
• Period: 15.73 ± 0.77 h
Mag
nitu
de c
hang
e
ASTEROID PHOTOMETRY GROUP, VSA 2011 19
• Aug 11/12/13/14 2011.
• Period: 16,31 ± 0,54 h
Mag
nitu
de c
hang
e
Synodic phase
ASTEROID PHOTOMETRY GROUP, VSA 2011 20
• 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
ASTEROID PHOTOMETRY GROUP, VSA 2011
213 P/Van Ness
ASTEROID PHOTOMETRY GROUP, VSA 2011
• 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
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
ASTEROID PHOTOMETRY GROUP, VSA 2011 25
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