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?

draw the side view for this shape.

Section 8.3 8.3 Calculate the synodic period of Venus relative to the earth. {Ans.: 583.9 days}

I need the answer as soon as possible

Hi, plz show full working and explanation. Also USE INFORMATION FROM GRAPH to answer the questions. Thanks

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.

For the sation location, the question says "At 4pm UTC, choose the point on the Earth, which has the Astra 2E in the zenith at that time". Does that mean the station is directly beneath the satellite? Does that give a hint to its location?

The star 18 Scorpii's mass is 2.0 x 103 kg, its radius is 7.0 x 105 km, and it has a rotational period of approximately 23 days. If 18 Scorpii should collapse into a white dwarf of radius 5.8 x 103 km, what would its period (in s) be if no mass were ejected and a sphere of uniform density can model 18 Scorpii both before and after? 4E-4 X S

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 Ⓡ