If you look carefully, you might see the X-37B flying above you.

Just wanted to note that Heavens Above tracks the semi-secretive X-37B, an unmanned spaceship in the image of the space shuttle.  The magnitude is counter-intuitive: the higher the number, the dimmer it is, whereas the brightest values are negative; in other words, you'll need a binocular and know where to look.

Note: You have to adjust your location on their map, in order to accurately plot sky maps, paths and times of X-37B passes in the sky above you.

Date	Brightness	Start			Highest point			End			Pass type
	[Mag]	Time	Alt.	Az.	Time	Alt.	Az.	Time	Alt.	Az.
23 May	4.7	04:51:29	10°	SSE	04:52:34	11°	SSE	04:53:40	10°	SE	Visible
25 May	4.0	04:35:29	10°	SSW	04:37:55	20°	SSE	04:40:22	10°	ESE	Visible
26 May	4.4	03:42:06	13°	SSE	03:42:29	13°	SSE	03:44:07	10°	ESE	Visible
27 May	3.3	04:21:12	15°	SW	04:23:21	31°	SSE	04:26:17	10°	E	Visible
28 May	3.7	03:27:50	22°	SSE	03:27:51	22°	SSE	03:30:27	10°	ESE	Visible
29 May	2.6	04:06:53	19°	SW	04:08:52	44°	SSE	04:12:00	10°	E	Visible
30 May	3.0	03:13:29	34°	SSE	03:13:29	34°	SSE	03:16:18	10°	E	Visible
30 May	2.3	04:46:49	10°	W	04:50:02	61°	S	04:53:16	10°	E	Visible

I can definitively state that it's not easy to track something that dim, unless you're in a completely dark place.  However, it's really easy to spot the Iridium satellite flares.  These satellites are as bright or brighter than the planets, but the satellites move very fast and is visible for just a few seconds.  When you spot them, it's just the coolest thing.