I want to do something like Pendragon, in spaaaaace!

Just randomly create a rock, or garden world...

Lesser of two d% rolls for hundreds stacked on the bigger roll; 54 and 29 becomes 2954 meter rock, a couple of miles. Or randomly plot three d%-d% for XYZ coordinates, +25, -73, +17, a total of 79 lyr from Sol... randomly pick a star by type and find a mass and luminousity.

Spectral Class	Color	Surface Temperature	Percentage of Main-Sequence Stars
O	Blue	30,000–60,000 K	~0.00003%
B	Blue-white	10,000–30,000 K	~0.13%
A	White	7,500–10,000 K	~0.6%
F	Yellow-white	6,000–7,500 K	~3%
G	Yellow (like our Sun)	5,300–6,000 K	~7.6%
K	Orange	3,900–5,300 K	~12%
M	Red (red dwarfs)	Under 3,900 K	~76.5%