Photometry group of Višnjan School of Astronomy 2005

Photometry group of Višnjan School of Astronomy 2005

Ljuban Jerosimić, Elektrotehnicka skola Nikola Tesla (Beograd), Visnjan Observatory

Aleksandar Cikota, V. gimnazija (Zagreb), Visnjan Observatory

Ljuban Jerosimić, Elektrotehnicka skola Nikola Tesla (Beograd), Visnjan Observatory

Aleksandar Cikota, V. gimnazija (Zagreb), Visnjan Observatory

M A C E 2 0 0 6 - M a y 1 2 – 1 4 - V i e n n a, A u s t r i a

About Višnjan

• Why are we interested in the light curve?– Rotation period

– Shape of the asteroid

– Constitution of the asteroid

Introduction

• Learn how to use a remote telescope• Learn how use software for astrometry and photometry• Determine the light curve (rotation period, shape and constitution) of various asteroids• Research of TNO-s in the VOID

Goals:Goals:

Photometry group members: (from left) Ljuban Jerosimić, Petra Korlević, Aleksandar Cikota, Maja Hren

Team leader: Reiner Stoss

• remote telescope (MEADE Schmidt Cassegrain 0.3m) + CCD SBIG STL-1001E lacated on OAM – Observatorio Astronomico de Mallorca (MPC 620

Software

• MPO Canopus

- a full-featured astrometry and photometry program capable of providing high accuracy results in both

fields • Astrometrica - a interactive software tool for scientific grade

astrometric data reduction of CCD images

• Easy Sky Pro

- shows the complete night sky

Results - photometry

• Objects measured– (143) Adria

– (478) Tergeste

– (511) Davida

– (755) Quintilla

– (815) Coppelia

• Web page:– http://obswww.unige.ch/~behrend/

page_cou.html

Results - astrometry

• Objects reported:– (13564) 1992 UH1– (K01U19X) 2001 UX19– (K00R27G) 2000 RG27– (K01RF5J) – (80017) 1999 GQ39– (K01QQ1B) 2001 QB261– Adria– Quintilla– Coppelia– Tergeste– Mars Reconnaissance Orbiter

New Variable star New Variable star discoverydiscovery

• All our images we send to the light curve database to Raoul Behrend (Geneva, Switzerland) who noticed that one star, on the images of (381) Myrrha, changes the brightness

GSC 6321.0798 (OAM2)

R.A.: 19:52:35.76

Dec.: -20°05'14.6”

• Iowa Robotic Observatory (IRO) located at Winer Observatory in Arizona, USA Latitude: N 31° 39' 53“ Longitude: W 110° 36' 03“ Elevation: 1515m

• Rigel robotic telescope (37 cm diameter, f/14 Cassegrain reflector from Torus with FLI SITe-003 CCD camera)

GSC 6321.0798 (OAM2) CONCLUSIONS

• Algol type (EA)

• Lirae type (EB)

• W Uma type (EW) – contact system

• Period: 8.59h

• Peak to peak variability: 0.55mag

• We know for 30 000 variable stars, but we know for only a few hundreds contact eclipsing binary systems

Elipsing binary

Thank you for your attention!

Thank you for your attention!

Questions?Questions?

Contact:Contact:

Aleksandar Cikota alexci@gmx.net

Ljuban Jerosimić jerosimici@verat.net