Telescopefor astronomy practical test4th IESO 2010 team

Telescope systemVixen - VMC200L - 8" f/9.5 Modified Cassegrain(Sphinx) Equatorial mounting(Star Book) hand controllerTripod

Telescope systemTelescope finder (FOV: 7 degree)Flip mirror with 2 eye-piecesEye-piece

SpecificationsOptical Design: Catadioptric ReflectorEffective Aperture: 8" (200mm)Focal Length: 76.8" (1950mm)Focal Ratio: f/9.75Secondary Mirror: d=2.8"(72mm)Resolution (Dawes): 0.63" (16mm)Limiting Visual Magnitude: 13.3Optical Tube Dimensions : 232mm x 535mmFinder scope : 7x50mm (FOV: 7 deg)Weight: 5.9 kg

Mounting Description

Accessories and ConditionsThere are 10 unit telescopesEach unit will have accessories, i.e. a set of eye-piece (5, 9, 15, 20, 25 and 40 mm)Flip mirrorTelescope mounting position is already in N-S alignmentAstronomy practical test will be held at nightStudents private items should be prepared (jacket, medicine, etc.)

How to control the telescopeManual operation by lock/unlock clamps

Students will doLock/unlock R.A. clamp and Declination clamp (screw) on the both side of the mounting telescope (see mounting picture)Focusing telescope on the back side of the optical tube, if necessary.Choosing appropriate eye-piece

R.A. and Declination clampsTelescope will not move when R.A. and Declination clamps are tightenUnlock clamp one by one either R.A. or Declination clamp. Do not unlock both clampsIf R.A. clamp is loose, Declination clamp should be locked, vice-versaMove telescope to desired position. Lock R.A. clampUnlock Declination clamp. Move telescope. Lock Declination clampVice versa

DontDo not move telescope when telescope are in lock clampsDo not touch the finder scopeBe careful with the tripod telescope

LocationTest LocationGood weather: Students wait in 1 2 3If Bad weather: 1 4 3314 (for bad weather)2 (for good weather

Thank you

SKY has NO LIMITLulus Kurniawan, Dian Ariyatna Wardani, Febi Trihermanto, Febrie Ahmad Azizi, Erni Romauli, Zanzabila Avia Mexsida, Rufayda Abudan, Retno Dyah Hapsari, Farahhati Mumtahana, Gerhana Puannandra Putri

Coordinates Coordinates of Indonesia Air Force airport at Gading, Wonosari, YogyakartaSouth 070 55,0144, East 1100 34,344 and Altitude: 255 m above sea level

Prepared by Dhani Herdiwijaya (Email: dhani@as.itb.ac.id)