Entries tagged as Moon

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Moon and Venus, together

Posted by Wesley on
Venus shines on top of the crescent Moon at Bitgaram City

When Venus is visible in the evening sky, a crescent Moon can be found nearby roughly once a month in the west. The clouds and fogs cleared up yesterday evening, and I was able to see the two objects above the unfinished skyline of Naju Bitgaram City. A yellowish layer of smog is seen lingering on the horizon in the photo, but this was gone by the morning.

Device: iPhone 6 Plus
Settings: 29mm - ISO 500 - 1/4s - f/2.2
Filters: None
Time: 2015-03-22 19:29 KST
Location: Naju, Korea
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Shooting the Moon through binoculars

Posted by Wesley on
Binoculars help iPhone take this Moon photo

With iOS 8, apps can now provide individual manual control of ISO, shutter speed, focus, exposure, and white balance using public API. Apps that take advantage of this can bring fine-grained control of the cameras on the iPhone, a much sought feature by the users especially since iPhone's cameras perform so well. Now, there's a bit of problem with low light mode in iPhone 6 Plus, but that's another story.

The story here is that I used the iPhone 6 Plus camera on manual settings to take a photo of the Moon that's showing through a pair of Bushnell Birding Series 8x40 binoculars. Without them, the Moon would have come out as a tiny blob about 25 pixels wide. I held up the phone to the ocular lens by hand. It's not as impressive as the 50x zoom photos that my Canon SX50 HS can take, but it give me hope that some low-magnification astrophotography could be done with my iPhone with some clever apps and a clamp that can fix the phone to the binoculars.

Device: iPhone 6 Plus & Bushnell Birding Series 8x40
Settings : 29mm - ISO 50 - 1/125s - f/2.2
Filters: None
Time : 2014-11-03 01:34 KST
Location: Naju, Korea
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October 2014 Total Lunar Eclipse

Posted by Wesley on
Lunar eclipse progress in 8-minute intervals

Lunar eclipses happen every year, so it's not particularly rare. But they're not always total eclipses. In fact, the last total lunar eclipse in Korea happened in 2011. So this time around, I got myself fully ready to take some nice photos of the event with my superzoom camera, Canon SX50 HS.

On October 8, the Moon was to rise from due east on 17:59 and the eclipse was to start right after at 18:14, but the building next to my workplace was blocking the view. So after the work hours were over, I headed to a nearby overpass and set up my tripod near the center. I was able to start seeing the Moon getting behind the Earth's shadow, but just as I started taking the photos, heavy clouds started to block the view. It was frustrating, but I waited out.
Continue reading "October 2014 Total Lunar Eclipse"

Today's "The Toon-Box"

Posted by Wesley on
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Korean-Chinese Lunar Calendar Difference

Posted by Wesley on
In the light of the upcoming Chinese lunar calendar support in iOS 8, I've cross-compared the Korean and Chinese lunar calendar data to see where exactly the two calendars differ. The chart below shows the result.

The difference mostly happens one lunar month at a time, during which the Korean lunar calendar trails the Chinese by one day. 2012 had a special case where the lunar month became different, as the Korean one had a leap third month while the Chinese one had a leap fourth month.

The chart covers all dates between 1901 and 2050 by the Gregorian (regular Western) calendar.

If you want to add this information to your calendar, use the following URL:
Lunar Calendar Difference ICS file

Download the ICS file and open up in your calendar app. If you're using Google Calendar, right-click and copy the URL first. Then on the "Other calendars" menu on the left side of the Google Calendar, click the drop-down button on the right and select "Add by URL". You can paste the URL there to add the calendar.

Gregorian Korean Leap Chinese Leap Gregorian Korean Leap Chinese Leap
1914-06-23 1914-05-30 X
 1914-05-01 O 1973-01-04 ~ 1973-02-02 1972-11-30 ~ 1972-12-29 X 1972-12-01 ~ 1972-12-30 X
1914-06-24 ~ 1914-07-22 1914-05-01 ~ 1914-05-29 O 1914-05-02 ~ 1914-05-30 O 1973-12-24 ~ 1974-01-22 1973-11-30 ~ 1973-12-29 X 1973-12-01 ~ 1973-12-30 X
1914-11-17 ~ 1914-12-16 1914-09-30 ~ 1914-10-29 X 1914-10-01 ~ 1914-10-30 X 1976-11-21 ~ 1976-12-20 1976-09-30 ~ 1976-10-29 X 1976-10-01 ~ 1976-10-30 X
1916-02-03 ~ 1916-03-03 1915-12-30 ~ 1916-01-29 X 1916-01-01 ~ 1916-01-30 X 1978-04-07 ~ 1978-05-06 1978-02-30 ~ 1978-03-29 X 1978-03-01 ~ 1978-03-30 X
1918-12-03 ~ 1919-01-01 1918-10-30 ~ 1918-11-29 X 1918-11-01 ~ 1918-11-30 X 1982-11-15 ~ 1982-12-14 1982-09-30 ~ 1982-10-29 X 1982-10-01 ~ 1982-10-30 X
1919-08-25 1919-07-30 X 1919-07-01 O 1987-05-27 ~ 1987-06-25 1987-04-30 ~ 1987-05-29 X 1987-05-01 ~ 1987-05-30 X
1919-08-26 ~ 1919-09-23 1919-07-01 ~ 1919-07-29 O 1919-07-02 ~ 1919-07-30 O 1989-10-29 ~ 1989-11-27 1989-09-30 ~ 1989-10-29 X 1989-10-01 ~ 1989-10-30 X
1919-11-22 ~ 1919-12-21 1919-09-30 ~ 1919-10-29 X 1919-10-01 ~ 1919-10-30 X 1990-10-18 ~ 1990-11-16 1990-08-30 ~ 1990-09-29 X 1990-09-01 ~ 1990-09-30 X
1920-11-10 ~ 1920-12-09 1920-09-30 ~ 1920-10-29 X 1920-10-01 ~ 1920-10-30 X 1995-07-27 ~ 1995-08-25 1995-06-30 ~ 1995-07-29 X 1995-07-01 ~ 1995-07-30 X
1923-11-08 ~ 1923-12-07 1923-09-30 ~ 1923-10-29 X 1923-10-01 ~ 1923-10-30 X 1995-11-22 ~ 1995-12-21 1995-09-30 ~ 1995-10-29 X 1995-10-01 ~ 1995-10-30 X
1924-03-05 ~ 1924-04-03 1924-01-30 ~ 1924-02-29 X 1924-02-01 ~ 1924-02-30 X 1997-02-07 ~ 1997-03-08 1996-12-30 ~ 1997-01-29 X 1997-01-01 ~ 1997-01-30 X
1925-05-22 1925-04-30 X 1925-04-01 O 1999-01-17 ~ 1999-02-15 1998-11-30 ~ 1998-12-29 X 1998-12-01 ~ 1998-12-30 X
1925-05-23 ~ 1925-06-20 1925-04-01 ~ 1925-04-29 O 1925-04-02 ~ 1925-04-30 O 2001-04-23 ~ 2001-05-22 2001-03-30 ~ 2001-04-29 X 2001-04-01 ~ 2001-04-30 X
1927-10-25 ~ 1927-11-23 1927-09-30 ~ 1927-10-29 X 1927-10-01 ~ 1927-10-30 X 2005-12-01 ~ 2005-12-30 2005-10-30 ~ 2005-11-29 X 2005-11-01 ~ 2005-11-30 X
1928-10-13 ~ 1928-11-11 1928-08-30 ~ 1928-09-29 X 1928-09-01 ~ 1928-09-30 X 2012-04-21 ~ 2012-05-20 2012-03-01 ~ 2012-03-30 O 2012-04-01 ~ 2012-04-30 X
1931-05-17 ~ 1931-06-15 1931-03-30 ~ 1931-04-29 X 1931-04-01 ~ 1931-04-30 X 2012-05-21 ~ 2012-06-18 2012-04-01 ~ 2012-04-29 X 2012-04-01 ~ 2012-04-29 O
1934-10-08 ~ 1934-11-06 1934-08-30 ~ 1934-09-29 X 1934-09-01 ~ 1934-09-30 X 2012-06-19 ~ 2012-07-18 2012-04-30 ~ 2012-05-29 X 2012-05-01 ~ 2012-05-30 X
1936-07-18 ~ 1936-08-16 1936-05-30 ~ 1936-06-29 X 1936-06-01 ~ 1936-06-30 X 2012-08-17 ~ 2012-09-15 2012-06-30 ~ 2012-07-29 X 2012-07-01 ~ 2012-07-30 X
1942-09-10 ~ 1942-10-09 1942-07-30 ~ 1942-08-29 X 1942-08-01 ~ 1942-08-30 X 2013-06-08 ~ 2013-07-07 2013-04-30 ~ 2013-05-29 X 2013-05-01 ~ 2013-05-30 X
1942-11-08 ~ 1942-12-07 1942-09-30 ~ 1942-10-29 X 1942-10-01 ~ 1942-10-30 X 2019-11-26 ~ 2019-12-25 2019-10-30 ~ 2019-11-29 X 2019-11-01 ~ 2019-11-30 X
1943-11-27 ~ 1943-12-26 1943-10-30 ~ 1943-11-29 X 1943-11-01 ~ 1943-11-30 X 2020-02-23 ~ 2020-03-23 2020-01-30 ~ 2020-02-29 X 2020-02-01 ~ 2020-02-30 X
1944-01-25 ~ 1944-02-23 1943-12-30 ~ 1944-01-29 X 1944-01-01 ~ 1944-01-30 X 2023-05-19 ~ 2023-06-17 2023-03-30 ~ 2023-04-29 X 2023-04-01 ~ 2023-04-30 X
1949-03-29 ~ 1949-04-27 1949-02-30 ~ 1949-03-29 X 1949-03-01 ~ 1949-03-30 X 2026-10-10 ~ 2026-11-08 2026-08-30 ~ 2026-09-29 X 2026-09-01 ~ 2026-09-30 X
1950-03-18 ~ 1950-04-16 1950-01-30 ~ 1950-02-29 X 1950-02-01 ~ 1950-02-30 X 2027-02-06 ~ 2027-03-07 2026-12-30 ~ 2027-01-29 X 2027-01-01 ~ 2027-01-30 X
1950-06-15 ~ 1950-07-14 1950-04-30 ~ 1950-05-29 X 1950-05-01 ~ 1950-05-30 X 2028-01-26 ~ 2028-02-24 2027-12-30 ~ 2028-01-29 X 2028-01-01 ~ 2028-01-30 X
1952-08-20 ~ 1952-09-18 1952-06-30 ~ 1952-07-29 X 1952-07-01 ~ 1952-07-30 X 2029-07-11 ~ 2029-08-09 2029-05-30 ~ 2029-06-29 X 2029-06-01 ~ 2029-06-30 X
1954-02-03 ~ 1954-03-04 1953-12-30 ~ 1954-01-29 X 1954-01-01 ~ 1954-01-30 X 2031-02-21 ~ 2031-03-22 2031-01-30 ~ 2031-02-29 X 2031-02-01 ~ 2031-02-30 X
1955-02-22 ~ 1955-03-23 1955-01-30 ~ 1955-02-29 X 1955-02-01 ~ 1955-02-30 X 2035-01-09 ~ 2035-02-07 2034-11-30 ~ 2034-12-29 X 2034-12-01 ~ 2034-12-30 X
1958-02-18 ~ 1958-03-19 1957-12-30 ~ 1958-01-29 X 1958-01-01 ~ 1958-01-30 X 2036-12-17 ~ 2037-01-15 2036-10-30 ~ 2036-11-29 X 2036-11-01 ~ 2036-11-30 X
1966-01-21 ~ 1966-02-19 1965-12-30 ~ 1966-01-29 X 1966-01-01 ~ 1966-01-30 X 2040-09-06 ~ 2040-10-05 2040-07-30 ~ 2040-08-29 X 2040-08-01 ~ 2040-08-30 X
1968-04-27 ~ 1968-05-26 1968-03-30 ~ 1968-04-29 X 1968-04-01 ~ 1968-04-30 X 2041-03-02 ~ 2041-03-31 2041-01-30 ~ 2041-02-29 X 2041-02-01 ~ 2041-02-30 X
1970-07-03 ~ 1970-08-01 1970-05-30 ~ 1970-06-29 X 1970-06-01 ~ 1970-06-30 X 2046-06-04 ~ 2046-07-03 2046-04-30 ~ 2046-05-29 X 2046-05-01 ~ 2046-05-30 X
2050-02-21 ~ 2050-03-22 2050-01-30 ~ 2050-02-29 X 2050-02-01 ~ 2050-02-30 X

Calendar data compared were from:
Korean: Korea Astronomy & Space Information
Chinese: Hong Kong Observatory
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