Best time to see: 1 Sept, 22:30 BST (21:30 UT) Altitude: 11º Location: Capricornus Direction: South
Although not high in UK skies, Mars shines away at mag. –2.1 in the evenings at the start of September, with a decent apparent size of 20 arcseconds. As the Earth-Mars distance increases, the Red Planet’s appearance changes rapidly. By mid-month it’s significantly dimmer at mag. –1.7, with an 18 arcsecond disc. By 30 September, Mars is at mag. –1.3 with a 15 arcsecond diameter.