You landed a summer job as an assistant to an astronomy professor, who wants to study a nebula at right ascension 18 h 2

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You landed a summer job as an assistant to an astronomyprofessor, who wants to study a nebula at right ascension 18 h 23 m25 seconds, declination +19 deg 57 minutes 14 seconds. The both ofyou are observing this nebula at the VERITAS gamma-ray observatoryin southern Arizona, latitude 31.68, longitude -110.86. VERITAS canonly look at night. The best observations are those taken when thealtitude of the object is higher than 55 degrees, and the telescopecannot observe objects at an altitude lower than 20 degrees.
Will you be able to observe this nebula at optimal altitude inJune? September? January? Explain and show your work.
Hint: you want to work out the maximum altitude achieved by thenebula, which happens when it transits, or crosses VERITAS'meridian, so a meridian diagram might be a useful tool. Also,think about the RA of the sun during the specified months, based onwhat you know about how the sun's RA changes throughout theseasons. If the sun has a similar RA as the nebula, would thenebula be visible?