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PTS
週一 24 10月, 2011 11:13
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Asteroid occultation event on Oct 24, 2011
回覆: 5
觀看: 3401

Preliminary results

Here is the preliminary results (time in UTC):
Start of observation: 16:30
star & asteroid merged : 17:36:30
star dimmed: 17:40:56.183 (start of occulted)
star brightened : 17:41:12.733 (end of occultation)

star and asteroid separated: 17:44:50


pts
PTS
週一 24 10月, 2011 01:46
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Asteroid occultation event on Oct 24, 2011
回覆: 5
觀看: 3401

observation is successful

WC Yue's prediction is good to the second.
We visually observed the dimming at 17:41:00 UTC!

pts
PTS
週一 24 10月, 2011 00:45
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Outburst of the UGWZ candidate BW Scl
回覆: 4
觀看: 2630

The BW Scl is very bright.

Hi, Since I have more than 2 hours before the asteroid occultation, I have just captured some images of this dwarf nova. The StellaCam3's FOV is too small and cannot capture both comparison stars in one frame. Instead I have to use my Imperz 4M15. I'll try to post some images tomorrow, as I am now b...
PTS
週一 24 10月, 2011 00:38
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Asteroid occultation event on Oct 24, 2011
回覆: 5
觀看: 3401

Re: reminder

PTS 寫:Just a reminder.

pts
The sky is very clear. I am able to capture the 14.4 mag star with a 4 second exposure.
The asteroid is plainly visible and is moving towards the star.

pts
PTS
週六 22 10月, 2011 20:20
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Asteroid occultation event on Oct 24, 2011
回覆: 5
觀看: 3401

reminder

Just a reminder.

pts
PTS
週六 22 10月, 2011 10:49
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Outburst of the UGWZ candidate BW Scl
回覆: 4
觀看: 2630

Finder charts for BW Scl

Hi,
I've prepared finder charts for BW Scl.
All charts are 15 x 15 arcmin.
The bright star to the north (above) is of mag. 10.7 while the one below (south) is of mag 12.

pts
PTS
週五 21 10月, 2011 22:05
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Outburst of the UGWZ candidate BW Scl
回覆: 4
觀看: 2630

Outburst of the UGWZ candidate BW Scl

AAVSO Special Notice #261 Outburst of the UGWZ candidate BW Scl October 21, 2011 The short period cataclysmic variable BW Scl appears to be in outburst. The object was detected in outburst at m(vis)=9.6 by M. Linnolt on 2011 October 21.3146 (JD 2455855.8146), and confirmed by A. Plummer at m(vis)=9....
PTS
週五 21 10月, 2011 14:00
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Asteroid occultation event in the early morning of Oct 21
回覆: 4
觀看: 3058

Timing results

Here is the timings (all UTC time): Observation started : 16:58 Star & asteroid merged: 17:55 star disappeared : 18:03:19.430 Star re-appeared: 18:03:24.755 re-emerging of asteroid: ~18:10 Star & asteroid separated: 18:12:55 Remarks: Before merging of asteroid and star, recording was done at setting...
PTS
週五 21 10月, 2011 13:59
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Result of the timing observation
回覆: 0
觀看: 1581

Result of the timing observation

Here is the timings (all UTC time): Observation started : 16:58 Star & asteroid merged: 17:55 star disappeared : 18:03:19.430 Star re-appeared: 18:03:24.755 re-emerging of asteroid: ~18:10 Star & asteroid separated: 18:12:55 Remarks: Before merging of asteroid and star, recording was done at setting...
PTS
週四 20 10月, 2011 15:52
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Asteroid occultation event in the early morning of Oct 21
回覆: 4
觀看: 3058

Reminder

It seems favorable tonight.

pts
PTS
週五 14 10月, 2011 08:49
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: AAVSO Special Notice #258
回覆: 1
觀看: 2029

AAVSO Special Notice #258

AAVSO Special Notice #258 Request for monitoring of SS Cygni in support of European VLBI radio observations October 13, 2011 As mentioned in AAVSO Alert Notice 445 on August 19, 2011, Dr. James Miller-Jones (International Centre for Radio Astronomy Research, Curtin University, Perth, Western Austral...
PTS
週四 13 10月, 2011 15:08
版面: 談天說地 Chatting Square
主題: "力"能否轉彎傳導 + 是否絕對無可能中的可能
回覆: 39
觀看: 13249

Re: "力" 能否轉彎傳導

skynam 寫:把力施加於物件上,除了有反作用力之外,力還能否轉彎傳導,如90度角轉彎,如果有可能有方法,會否可以像飛碟般懸浮起來?
1. The worm gear system is an example. The axle of the worm is usually at right angle to the axle of the gear.

2. The pulley is another example

3. ...
4 ....

Too many examples
PTS
週四 13 10月, 2011 09:21
版面: 談天說地 Chatting Square
主題: 美國貧窮線原來係年薪少過四萬美元就係 “貧窮戶” ~
回覆: 18
觀看: 4960

Re: 美國貧窮線原來係年薪少過四萬美元就係 “貧窮戶” ~

wtyu21 寫:今晚睇完新聞,聽說佔領華爾街的抗議人士講,年薪低於四萬美金,要養車、要供樓、要養狗~咁窮,活在貧窮線之下,叫佢地點過日子~

三十二萬一年,香港白領要好高級先至有呢個價位,美國人真係~ :shock:
This is when relativity can be applied to daily life!

pts

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