香港天文論壇

Albireo, Epsilon Lyrae and Vega at Hokoon
While the sky is heavily overcast, I am able to capture seveal images while waiting for the students.
telescope: 50-cm RC reflector, f/8
camera: ASI174MC, binned 2
south is up, and east to the left

more images

more images

UFO near Asteroid Lotis on 2018 September 13 At around 12:41:30 UTC, while observing Lotis approaching the target star, an UFO in the form of 2 dim light dots (about magnitude 14, slightly brighter than Lotis) was seen about 5 arcmin to the SEE of otis, and moved fairly rapidly in the NEE direction....

2018 September 27 asteroid occultation event
I've prepared finder charts from:
Digital Sky Survey (15 x 15 arcmin) and The Sky 6 (15x11 arcmin)

IOTA/IOTA-ES occultation update for
(798) Ruth / UCAC4-512-001797 event on 2018 Sep 27, 16:25 UT
Visible from Japan, China, SE Asia

Sunset on Crater Gauss, with Tycho and Copernicus
Several snap shots of the Moon taken before and after the occultation event.

Sunset on Lunar Crater Gauss

Telescope : 50-cm RC reflector at Hokoon
Camera: ASI178MC (binned 2)
taken at 15:44:01 UTC and 18:04:22 UTC

Albireo (Beta Cygni) and Double Double (Epsilon Lyrae)
While waiting for the occultation event, several snap shorts were taken.
Telescope: 50-cm RC reflector at Hokoon
Camera: ASI178MC (binned 2)
south is up, east to the left.

2018 September 25 asteroid occultation event Observation of the occultation of HIP15555 by (1256) Normannia was carried out at Hokoon. Observers include GT Fish, Kenneith Hui and myself. Due to the interference of clouds, the video recording was interrupted several times and it will be difficult, if...

2018 October 31 asteroid occultation event I've prepared finder charts from: Digital Sky Survey (15 x 15 arcmin) and The Sky 6 (15x11 arcmin) IOTA/IOTA-ES occultation update for (2394) Nadeev / TYC 6351-00085-1 event on 2018 Oct 31, 11:45 UT Visible from Japan, China, SE Asia Summary ------- On 2018...

Reminder.
There may be good chance tonight.

Data reduced for the observation of the 2018 September 13 asteroid occultation event. Data reduction by Tsutomu Hayamizu of NAO, Japan. Observer: Taksun Poon, Kenneith Hui, Bartholomew Tsang, Thomas Fok Place: Tsuen Wan, Hong Kong, China Long.: 114o 06' 29.39" E, Lat.: 22o 23' 00.91" N, Height: 150m...

A report of this observation was sent to IOTA, and Dr. Soma Mitsuru of the National Astronomical Observatory, Japan who is responsible for asteroid occultation data in Asia.

M57 (Ring Nebula) at Hokoon
Several snap shots were taken of M57, a relaxation exercise after the occultation observation.

Telescope : 50-cm f/8 RC reflector
Camera : ASI1600MM Pro(no cooling)
exposure : 1, 2, 4 and 15 second

Successful observation of the 2018 September 13 asteroid occultation event Thanks to the incoming typhoon, we have a clear sky this evening. With the help of Kenneith Hui, Bartholomew Tsang and Thomas Fok, and GT Fish, we complete preparation and the target star was located at around 12:20 UTC. Prel...

TIMING OBSERVATION OF ASTEROID OCCULTATION EVENTS For new comers to timing observation of asteroid occultations, here is a brief guide: a. You shoud have a well aligned mounting. Equatorial mount is desirable but altazimuth mounts are perfectly useful. GOTO mounts are useful but not a must. b. Use a...