Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 9 of 9
Full-Text Articles in Physical Sciences and Mathematics
Photoelectric Magnitude Measurements Of The Lunar Eclipses On May 16, 2003 And Oct. 28, 2004, Richard W. Schmude Jr.
Photoelectric Magnitude Measurements Of The Lunar Eclipses On May 16, 2003 And Oct. 28, 2004, Richard W. Schmude Jr.
Georgia Journal of Science
The Moon's brightness dropped by 10.73 ± 0.07 and 10.61 ± 0.15 magnitudes during the total lunar eclipses on May 16, 2003 and Oct. 28, 2004 respectively. These magnitude drops are close to the corresponding value for the Jan., 2000 total lunar eclipse and indicate that not much change in the transparency of the atmosphere has occurred in the last 4 years.
Wideband Photometry Of Saturn In 2004-2005, Richard W. Schmude Jr.
Wideband Photometry Of Saturn In 2004-2005, Richard W. Schmude Jr.
Georgia Journal of Science
The writer made 60 photometric measurements of Saturn + rings between Nov. 5, 2004 and Jan. 21, 2005. The normalized magnitudes of Saturn for a ring tilt angle of 22° are B(1,0) = -8.55 ± 0.01, V(1,0) = -9.60 ± 0.01, B(1,0) = -10.27 ± 0.01, and I(1,0) = -10. 4 7 ± 0.01; the corresponding solar phase angle coefficients are cB = 0.027 ± 0.006, cV = 0.021 ± 0.005, cB = 0.020 ± 0.005, and cB = 0.022 ± 0.005. The 2005 opposition surge values (in magnitudes at a = 0°) are B = …
Wideband Photometric Magnitude Measurements Of Saturn Made During The 2005-06 Apparition, Richard W. Schmude Jr.
Wideband Photometric Magnitude Measurements Of Saturn Made During The 2005-06 Apparition, Richard W. Schmude Jr.
Georgia Journal of Science
The writer made 37 brightness measurements of Saturn + rings between Nov. 3, 2005 and March 16, 2006 using the B (blue), V (green), R (red), and I (infrared) filters. The selected normalized magnitudes of Saturn at a ring tilt angle of 18° are: B(1,0) = - 8.43 ± 0.03, V(1,0) = -9.48 ± 0.02, R(1,0) = -10.16 ± 0.04, and 1(1,0) = -10.28 ± 0.02. The selected phase angle coefficients of Saturn, in magnitudes/degree, are: cB = 0.022 ± 0.014, cV = 0.021 ± 0.008, cR = 0.027 ± 0.015, and cI = 0.018 ± …
Wideband Photometry Of Saturn In 2006-2007, Richard W. Schmude Jr.
Wideband Photometry Of Saturn In 2006-2007, Richard W. Schmude Jr.
Georgia Journal of Science
The writer carried out brightness measurements of Saturn and its rings with four different color filters. The selected normalized magnitudes of Saturn + rings for a ring tilt angle of 14° are B(1,0) = -8.25 ± 0.03, V(1,0) = -9.36 ± 0.03, R(1,0) = -10.01 ± 0.04 and 1(1,0) -10.16 ± 0.04. The opposition surge values for Saturn+ rings on Feb. 11, 2007 (solar phase angle = 0.15°) were 0.19 and 0.06 magnitudes for the Band V filters respectively. The writer concludes that the B-V and V-R color indexes of Saturn+ rings do not change much when the solar phase …
Wideband Photometry Of Saturn In 2007-2008, Richard W. Schmude Jr.
Wideband Photometry Of Saturn In 2007-2008, Richard W. Schmude Jr.
Georgia Journal of Science
The writer made 45 brightness measurements of Saturn + rings between Nov. 28, 2007 and April 24, 2008. The selected B(1,0), V(1,0), R(1,0) and I(1,0) values for Saturn + rings for b = 7° are: -8.10 ± 0.01, -9.14 ± 0.01, -9.77 ± 0.01 and -9.87 ± 0.02 respectively. The selected solar phase angle coefficients (in magnitudes/degree) are: 0.041 ± 0.006, 0.034 ± 0.005, 0.022 ± 0.007 and 0.027 ± 0.007 respectively. It is concluded that the angle between the ring plane and the Sun (B') has as much affect on the results as the angle between the ring plane …
Wideband Photometry Of Saturn In 2008-2009, Richard W. Schmude Jr.
Wideband Photometry Of Saturn In 2008-2009, Richard W. Schmude Jr.
Georgia Journal of Science
A total of 52 brightness measurements of Saturn were made during its 2008-2009 apparition. (An apparition is the time interval between when the planet is in conjunction with the Sun to the next time that it is conjunction with the Sun.) The selected normalized magnitudes of Saturn for b = 3.0° are B(1,0) = -7.87 ± 0.02, V(1,0) = - 9.00 ± 0.01, R(1,0) = -9.62 ± 0.01 and I(1,0) = -9.63 ± 0.01. (I have defined b as the square root of the absolute value of the product of the Saturnicentric latitude of the Earth and of the Sun; …
Full-Disk Wideband Photometry Of The Moon: R And I Filter Measurements, Richard W. Schmude Jr.
Full-Disk Wideband Photometry Of The Moon: R And I Filter Measurements, Richard W. Schmude Jr.
Georgia Journal of Science
A total of 42 full-disk brightness measurements of our Moon are reported. These measurements include the entire lunar disk including the Earthlit portion. All measurements were made on the Johnson R (red) and I (infrared) system and were fitted to cubic equations. The results are summarized in this report. The selected normalized magnitudes of the Moon are R(1,0) = -0.70 ± 0.10 and I(1,0) = -1.12 ± 0.06. The selected geometric albedo is 0.18 ± 0.01 for the Johnson R and I system.
Some Recent Studies Of Mars: The North Polar Cap, Cecropia And Hellas, Richard W. Schmude Jr.
Some Recent Studies Of Mars: The North Polar Cap, Cecropia And Hellas, Richard W. Schmude Jr.
Georgia Journal of Science
This paper summarizes changes on Mars which occurred in 2014. Images recorded by the Mars Reconnaissance Orbiter’s MARCI camera (hereafter MRO) and those made from the Earth are examined. It is concluded a spiral-shaped cloud of water ice crystals developed and moved eastward at an average speed of 1.7 m/s, a temporary isolated bright patch in Cecropia developed and one or more dust storms developed at the NPC edge near 83° N, 320° W. Measurements of the boundary of a white area in Hellas are consistent with it not changing as the year, season or time of day progressed. This …
The North Polar Cap Of Mars, Richard W. Schmude Jr.
The North Polar Cap Of Mars, Richard W. Schmude Jr.
Georgia Journal of Science
During late 2013 and early 2014, the Northern Hemisphere of Mars faced Earth. This provided a prime opportunity for studying its North Polar Cap (NPC). The writer measured the cap size during the intervals 30° < Ls < 70° and 82° < Ls < 134°. (The areocentric longitude of the Sun from Mars is designated as Ls and it determines the seasons on that planet; essentially, the beginning of the northern spring, summer, fall and winter are at Ls = 0°, 90°, 180° and 270°). NPC latitude measurements were made with the software package WinJupos. The mean latitudes were measured for 23 four-degree intervals of Ls. Wilcoxon Signed Rank Tests at the 90% confidence level are consistent with there being no statistical difference between the NPC in 2000 and both 2013 and 2011-2012 for 30° < Ls < 70°. Based on this same test there is a statistical difference for the NPC in 2002 and 2009-2010 compared to 2000. Therefore, it is concluded that the NPC may show interannual differences. Essentially, the NPC stopped shrinking at Ls = 82°. …