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Observatory code was assigned by The International Astronomical Union (IAU) Minor Planet Center (MPC) for a permanent observatory that intended to do astrometric CCD-observing program of minor planet or comets in solar system. The purpose of acquiring an observatory code is to document specific details about a particular observation site and the types of instruments used within the observatory. In addition, many astronomical centers and stations worldwide will know there is an active observatory at the particular location and international cooperation program in astronomy observation is possible. The Langkawi National Observatory has initiated an observation program to monitor minor planet, specifically those Near Earth Objects (NEOs) that may bring potentially hazardous to the Earth. In order to fulfil the requirement that stated by MPC for undertaking astrometric CCD-observing program, an observatory code was required. The instruments and methods that applied to obtain the observatory code will be discussed. The Langkawi National Observatory is now coded as O43 and listed in the MPC system, the single worldwide location for receipt and distribution of positional measurements of minor planets, comets and outer irregular natural satellites of major planets.

We present seeing measurements of Langkawi National Observatory during the period from 2014 May 6 to 2015 March 26. The measurements were carried out with Differential Image Motion Monitor (DIMM) of STV and Alcor system. The median seeing was measured to be best at 0.8 arcseconds in May 2014 with STV system and 0.5 arcseconds in December 2015 with Alcor system.

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