Observing from the top of 40.462°N, 86.930°W* in the night from Tuesday to Wednesday Aug 27to Aug 28, in which region of the geostationary ring do satellites have to be in order to betheoretically optically (with a telescope) observable? Give your answer in orbital elements. What equations would you use to calculate the orbital elements?

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α Centauri is a triple system of stars: α Cen A has an absolute V magnitude of 4.34 mag, α CenB has an absolute V magnitude of 5.70 mag and α Cen C has an absolute V magnitude of 14.45 mag. For adistant observer who cannot resolve the three individual stars in α Centauri, what is the combined absolute Vmagnitude of the α Centauri star system that this observer would measure?

4. 51 Pegasi b was the first extra-solar planet found around a main sequence starother than our Sun. The star, 51 Pegasi, is very much like the Sun, and it has a luminosityL = 1.30L⊙. 51 Pegasi b has an average orbital radius of 0.0527 AU and it is tidally lockedto 51 Pegasi. Given that it thought to have a Bond albedo of 0.1, what is its “no greenhouse”temperature? Note- it is tidally locked, but you should assume the temperature of the planetis uniform due to winds transferring heat.

3¹ TE MY NOTES ASK YOUR TEACHER SAMC) If the RR Lyrae stars in a globular cluster have average apparent magnitudes of +16, how far away (in pc) is the cluster? (Hints: See the following figure, and use the magnitude-distance formula: d = 10(my-Mv+5)/5.) Absolute magnitude pc 6 0 0.3 Type I (classical) Cepheids Type II Cepheids RR Lyrae stars 10 Pulsation period (days) 30 104 103 10² 100 Luminosity, L/L Ⓡ

Mail - S Interval Cock Sh O HW 20 RedShe Co X Faraday in enginee M Your Tw O (236) SF O ThatPur Answer Launch ô https://openvellum.ecollege.com/course.html?courseld=16614876&OpenVellumHMAC=c74d12bc849ad... Course Home As shown, the truss is loaded by the forces P = 203 lb and P2 = 410 lb and has the dimension a = 3.00 ft . y B a Using the method of joints, determine FAB, FBC, and FBD, the magnitude of the force in each of the members connected to joint B. Assume for your calculations that each member is in tension, and include in your response the sign of each force that you obtain by applying this assumption. Express your answers numerically in pounds to three significant figures separated by commas. • View Available Hint(s) ΑΣΦΜ ? vec 9:41 AM O Type here to search 100% 4/12/2021

6:38 ul LTE Screenshot_20201226-183601_Driv... Solar Probe Plus, Working with Angular Diameter The Solar Probe Plus mission will be launched in 2018 for a rendezvous with the sun in 2024. To lose enough energy to reach the sun, the spacecraft will make seven fly-bys of Venus. The 480 kg spacecraft, costing $740 million, will approach the sun to a distance of 5.8 million km. Protected by the heat shield will be five instruments that will peak over the edge of the heat shield and measure the particles and radiation fields in the outer solar corona. At the closest approach distance, the sun will occupy a much larger area of the sky than what it does at the distance of Earth. The angular size of an object as it appears to a viewer depends on the actual physical size of the object, and its distance from the viewer. Although physical size and diameter are usually measured in terms of meters or kilometers, the angular diameter of an object is measured in terms of degrees or radians. The…

Find the apparent solar time (AST) corresponding to 8:00 a.m. central time on July 21 in Phoenix, AZ, which is located at 112° W longitude and a northern latitude of 33.43°