Right ascension, Equinox, Positions Help
For an object at about RA 6h and close to the celestial equator, viewed from 37 degrees N, it becomes visible in the early morning on about July 20th, and it is is visible at some point during the night until about May 20th, when it sets shortly after the sun.  Between May 20th and July 20th it is not visible. (Determined Stellarium)
An example of such an object is Betelgeuse.
An object that is at 6h of right ascension will culminate at midnight (ie reach its highest point at midnight about on the winter solstice on Dec 21st. The sun has a right ascension of 6 hrs on the summer solstice on June 21st and a RA of 18 hours on the winter solstice.  So the best time to observe the object would be on the winter solstice.