Moon Project Jessica Davidson Astronomy 7 Observation Time: 8:50 p. m. Obervation 1 A) Date & Location: September 24, 2012. Mt. SAC Campus B) North determined by IPhone App C) Altitude: 37 degrees D) Azimuth: 143 degrees E) F) Waxing Gibbous G) Moon rose at 3:24 p. m. Observation 2 A) Date & Location: September 26, 2012. Mt. SAC Campus B) North determined by IPhone App C) Altitude: 47 degrees D) Azimuth: 133 degrees E) F) Waxing Gibbous G) 4:40 p. m. Observation 3 A) September 28, 2012. Mt. SAC B) North determined by iPhone App C) Altitude: 46 degrees D) Azimuth: 134 degrees
E) F) Almost looks like a full moon, but waxing gibbous G) 5:45 p. m. Observation 4 A) September 30, 2012. My home in Hacienda Heights B) North determined by iPhone app C) Altitude: 35 degrees D) Azimuth 145 degrees E) F) Full Moon G) 6:50 p. m. Observation 5 A) October 2, 2012. My home in Hacienda Heights B) North determined by iPhone app C) Altitude: 22 degrees D) Azimuth: 158 degrees E) F) Waning Gibbous G) 8:01 p. m. H) The moon was just about at transit, because according to the moon transit for today it was supposed to occur at exactly 8:50 and that is when I did my observation.
Also, I knew it was at transit by creating an imaginary line from the mountains (north) to south and the moon landed just about below that from what it appeared to me. I) N/A J) N/A K) N/A H) The moon was before transit because when looking at the moon, it appeared before my imaginary North to South line in the sky. It was not at its highest point yet. I) The amount of the moon lit up looked bigger. At the same time there was less dark on the moon than the previous observation. J) The altitude increased by 10 degrees, while the azimuth decreased by 10 degrees.
K) Compared to observation 1, the moon rose 1 hour and 16 minutes later. H) The moon was before transit because when looking at the moon it appeared far below my imaginary line of North to South. It was much lower in the sky, and the azimuth was less than 180 degrees. I) The amount of moon showing on this day had much more of the moon than the previous observation. It looked practically all lit up. J) The altitude decreased by 1 degree, while the azimuth also increased by 1 degree. K) Compared to observation 2, the moon rose 1 hour and 5 minutes later.
H) The moon was before transit, I know this because when I looked at the moon and created my imaginary line in between the mountains (north) to south, the moon was too left of my line. Also, when I calculated the azimuth it was less than 180 degrees which makes it before the transit. I) Compared to observation 3, the moon at this time was all lit up. The moon was not showing any darkness, at least that wasn’t visible to my eyes when I observed it. J) In contrast to observation 3, observation 4 the altitude decreased by 11 degrees, but the azimuth increased by 11 degrees.
K) The moon rose later by 1 hour and 5 minutes compared to the 3rd observation. H) The moon was before transit when I observed it. I know this because every single time I drew an imaginary line with my arm from North (the mountains) directly opposite which is south, and the moon fell too left of my line ;therefore, making it before transit and not the highest point. Also, the azimuth was less than 180 degrees which gave an estimate at where it would be in the sky. I) According to my previous observation with the full moon, this observation was less lit up than before.
There was a small sliver of darkness that appeared now on the right side of the moon from where I was standing. J) The altitude decreased by 13 degrees since the previous observation, and the azimuth increased by 13 degrees. K) The moon rose 1 hour and 11 minutes later than observation 4. Questions 5-8 5) When I first observed the moon on September 24, 2012 I observed that it was at a waxing gibbous phase which meant that I saw nearly half of the moon lit up, and half was dark basically.
Every two days that I made an observation, the moon seemed to get bigger each time, but on the last day it started to decrease from the full moon phase but only slightly. On October 2, 2012 for my last day of observation I saw that the part of the moon I could see was getting smaller, but only by a little. The moon changed from small to full moon which was big, and then back to becoming smaller. I understand that the moon doesn’t actually change sizes, but when observing the amount of light or darkness that I can see, hence it appears smaller or bigger. ) The moons altitude increased from each other by 10 in the first two observations, and after that there was a short decrease of 1degree, and then by 11 degrees, and then the last altitude decrease was by 13 degrees. The moons azimuth first decreased from observation 1 to observation 2 by 10 degrees, just as the altitude had. After the 2nd observation, it had only increased by 1 degree, and then had increased from the 3rd observation to the 4th by 11 degrees, and the last increase from the 4th observation to the 5th by 13 degrees, just as the altitude had done.
The moons altitude from the 1st observation to the last observation had decreased by 15 degrees, and the moons azimuth had increased by 13 degrees. The azimuth’s compass direction moved East to West from the first observation to the last observation. 7) The moons rise time always ended up later each day than the previous rise time. The first observation of the moon rise time was 3:24 p. m. , and the second day of moon rise time was 4:40 p. m. , there was an increase of 1 hour and 24 minutes. The moon rose later from the second observation to the third observation by 1 hour and 5 minutes, rising at 5:45 p. . From the third observation to the fourth observation, the moon rose later by 1 hour and 5 minutes just as the previous observation had. On the last observation from the fourth observation to the fifth, the moon rose later by 1 hour and 11 minutes. In total, the moon rose later from the first observation to the last by 4 hours and 37 minutes difference. 8) By doing this project I have learned that there many different patterns for which the moon rises, how it looks on a day to day basis, and how these attributes affect the visibility of the moon to our eyes.
I really enjoyed taking the time to observe the moon because it’s not every day that I would even consider to compare how the moon looks different each day and learn why. The whole project was informative to me, and I think that more people should observe the objects in the sky more often; since there are not many celestial objects we can observe with the naked eye. I also learned that after a full moon, the moon begins to get smaller and the darkness will slowly overcome the light we see.