Asteroid 2841 Puijo is a main belt asteroid that was discovered on 26 February, 1943 by L. Oterma at Turku. The semi-major axis is 2.16 AU and the eccentricity is 0.084 and the inclination is 4.91 degrees.
I observed this asteroid on 3 nights during February and March 2004. A period of 12.72 hours was derived however this result is very uncertain as the data was quite noisy. It is possible that the period is much shorter.