Bookmark and Share

Astronomical Info / 天文資訊 > Special Astronomical Events / 特別天文事件 > Transit of Venus on June 6th, 2012 | 2012 年 6 月 6 日之金星凌日 [Refresh 更新]

Quick info 快速資訊: Transit time at Hong Kong 香港可見凌日時間 : 2012/06/06 06:12 - 12:49 HKT

Quick links 快速連結:
- Live webcast 網上直播 - Information about the transit 是次凌日資料
- Local (HK) circumstances 本地 (香港) 情況 - Future transits of inferior planets 未來內行星凌日
Live webcast 網上直播

Please click on the links below for live webcast. All links redirect you to external websites and open in new windows. Additional links may be added during the transit. 請按下列連結以觀看網上直播。所有連結連至第三者網站並以新視窗開啟,而金星凌日進行期間我們可能會增添直播連結。

Provider 提供者 Location 地點

- HK Observatory, HK Space Museum & Ho Koon Nature Education cum Astronomical Centre 香港天文台、香港太空館及香港天文台及可觀自然教育中心暨天文館

Hong Kong 香港

- 台灣中央氣象局

Taiwan 台灣

- Exploratorium

Transit of Venus | exploratorium.edu/venus

Hawaii, United States 美國夏威夷

- Astronomers without Borders

Los Angeles, United States 美國洛杉磯

- NASA

Various locations 多處地方

<Back to Top 返回頁頂>

Information about the transit 是次凌日資料

Transit of Venus is a periodic but rare astronomical phenomenon that occurs when Venus is directly between the Sun and Earth. The separation within a pair of transits is around 8 years, but separation between pairs alternates between 121.5 and 105.5 years. The coming transit of Venus is the second of a pair, the first of which occurred on June 8, 2004. There will be no more transits of Venus in this century.

The times of the transit are more or less the same across the globe. Weather permitting, everywhere on Earth such that the Sun is above horizon during that time frame can view this event. The Venus will appear as a dot on the solar disk, the size of which is around 1/30 of the angular diameter of the Sun. Global visibility of the transit is listed as follows.

A map of global visibility is provided below.

金星凌日是一週期性但較為罕見的天文現象,於金星處於地球及太陽之間的時候發生。在一對金星凌日中,兩次事件時間相隔 8 年,但兩對間的間距則梅花間竹地為 121.5 及 105.5 年。本年 6 月 5/6 日的金星凌日為一對中的第二次;上一次於 2004 年 6 月 8 日發生。今次之後,本世紀將不再出現金星凌日。

世界各地凌日的時間大致相同。如天氣許可,凌日時太陽於地平線以上的地區均可看到。在太陽圓盤上,金星將為一小點,角直徑為太陽的約 1/30 。本次凌日各地可見情況如下:

下面有一全球可見區域圖以供參考。

Global Visibility Map of the Transit of Venus on June 5/6, 2012
2012 年 6 月 5/6 日金星凌日全球可見區域圖

 

Transit Times and Map of Venus across the Solar Disk*
凌日時間及金星經過太陽圓盤的位置*

*Times applicable to observer at Earth's centre. Due to parallax, exact times for any place on Earth's surface may differ by 7 minutes.
*適用於在地心的觀測者。由於視差關係,地表各地之時間可相差 7 分鐘。

<Back to Top 返回頁頂>

Local (HK) circumstances 本地 (香港) 情況

It is very fortunate that, for Hong Kong, both transits in 2004 and 2012 occur when the Sun is above the horizon. The coming transit will be visible in its entirety if weather permits. The Sun rises at 05:39 HKT on June 6, and Venus will start to enter the solar disk at 06:12 HKT. The planet will cross the solar disk during that morning, and will leave at around 12:49 HKT. Ingress can only be seen at places not obscured to the ENE, but for the most part of the transit it will be very accessible to observers since the Sun will be high in the sky. Near the end of the transit, the Sun will almost be overhead so that it is virtually visible in any outdoor location.

Since the Sun is extremely bright during the transit, observers must use appropriate solar filters [details].

本世紀兩次金星凌日都幸運地於香港可見。如天氣許可,香港將可見是次凌日的整個過程。本港於 6 月 6 日的日出時間為上午 5 時 39 分,而金星則於 6 時 12 分開始進入太陽圓盤。在整個上午金星將逐步橫過太陽,並於約下午 12 時 49 分離開。由於凌日初時太陽仰角頗低,該部分只可於東北偏東面沒有阻擋的地方可見。但是,凌日期間太陽高度角將逐漸上升,觀測者將很容易見到其大部分過程。接近凌日尾聲,太陽將非常接近天頂,因此幾乎所有戶外地方也可看到。

由於凌日期間太陽光非常猛烈,觀測者必須使用合適太陽濾光鏡 [詳情]。

Local Circumstances

The details are summarized in the following table:

詳細資料整理如下 :

Event for Hong Kong
在香港看到的事件
Time in HKT on 2012/06/06
2012 年 6 月 6 日香港時間
Solar Altitude and Azimuth
太陽的高度和方位角
First contact / Exterior ingress 凌始外切 / 初虧
(Venus starts to enter solar disk 金星開始進入太陽圓盤)
06:12 Altitude 高度 : 6°
Azimuth 方位角 : 068° (ENE 東北偏東)
Second contact / Interior ingress 凌始內切 / 食既
(Venus fully inside solar disk 金星完全進入太陽圓盤)
06:30 Altitude 高度 : 10°
Azimuth 方位角 : 070° (ENE 東北偏東)
Greatest transit 最大食 / 食甚
(Venus closest to solar centre 金星最接近太陽中心)
09:31 Altitude 高度 : 51°
Azimuth 方位角 : 081° (E 東)
Third contact / Interior egress 凌終內切 / 生光
(Venus starts to leave solar disk 金星開始離開太陽圓盤)
12:31 Altitude 高度 : 88°
Azimuth 方位角 : 281° (W 西)
Fourth contact / Exterior egress 凌終外切 / 復圓
(Venus fully leaves solar disk 金星完全離開太陽圓盤)
12:49 Altitude 高度 : 84°
Azimuth 方位角 : 275° (W 西)

<Back to Top 返回頁頂>

Future transits of inferior planets 未來內行星凌日

Transits of Venus will not recur this century, but the more common transit of Mercury will next occur in 2016. However, the next transit of Mercury visible in Hong Kong will not take place until 2032

金星凌日將不會於本世紀再出現,至於較常見的水星凌日則會於 2016 年重臨,但香港不可見。下一次香港可見的水星凌日將於 2032 年發生。

Transit of Mercury in the next 30 years 未來 30 年的水星凌日
Date (UTC)
日期 (世界協調時)
Time of greatest transit (UTC)
食甚時間 (世界協調時)
Visibility at HK
香港可見類型
2016/05/09 14:57 Whole process invisible 整個過程不可見
2019/11/11 15:20 Whole process invisible 整個過程不可見
2032/11/13 08:54 Transit at sunset (after half) 凌日於日落進行中 (食甚後)
2039/11/07 08:46 Transit at sunset (after half) 凌日於日落進行中 (食甚後)
Detailed catalogue 詳細目錄: http://eclipse.gsfc.nasa.gov/transit/catalog/MercuryCatalog.html

Transit of Venus in the next 300 years 未來 300 年的金星凌日
Date (UTC)
日期 (世界協調時)
Time of greatest transit (UTC)
食甚時間 (世界協調時)
Visibility at HK
香港可見類型
2117/12/11 02:48 Whole process visible 整個過程可見
2125/12/08 16:01 Whole process invisible 整個過程不可見
2247/06/11 11:33 Transit at sunset (before half) 凌日於日落進行中 (食甚前)
2255/06/09 04:38 Whole process visible 整個過程可見
Detailed catalogue 詳細目錄: http://eclipse.gsfc.nasa.gov/transit/catalog/VenusCatalog.html

<Back to Top 返回頁頂>


Transit times and information are based on Transit Predictions by Fred Espenak, NASA's GSFC. NASA's transit page: here.

Last Accessed 最近訪問日期: Mon Sep 28 2020 19:01:13 HKT
Last Modified 最近修訂日期: Sun May 01 2016

觀看訪客統計報表 Web Traffic Statistics



Statistics