2031 BAM, provisional designation 1969 TG, is a stony Florian 2 asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 8 October 1969, by Soviet astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula. The asteroid was named for those who built the  Baikal–Amur Mainline (BAM; БАМ), a Siberian railway line.
Orbit and classification BAM is a member of the Flora family ( ), 402  a giant  asteroid family and the largest family of stony asteroids in the main belt.  : It orbits the Sun in the 23 inner asteroid belt at a distance of 1.8–2.6 AU once every 3 years and 4 months (1,220 days; semi-major axis of 2.23 AU). Its orbit has an eccentricity of 0.17 and an inclination of 5 ° with respect to the ecliptic.
observation arc begins with its identification as 1939 VB at Uccle Observatory in November 1939, almost 30 years prior to its official discovery observation at Nauchnyj.
BAM has been characterized as a stony S-type asteroid by Pan-STARRS photometric survey.
In October 2016, a rotational
lightcurve of BAM was obtained from photometric observations by amateur astronomer Matthieu Conjat. Lightcurve analysis gave a well-defined rotation period of 10.774 hours with a brightness amplitude of 0.15 magnitude ( ). U=3
Diameter and albedo
According to the survey carried out by the Japanese
Akari satellite, BAM measures 8.14 kilometers in diameter and its surface has an albedo of 0.170. The  Collaborative Asteroid Lightcurve Link assumes a standard albedo of 0.24 – derived from 8 Flora, the parent body of the Flora family – and calculates a diameter of 7.14 kilometers based on an absolute magnitude of 12.9.
minor planet was named after those who constructed the Baikal–Amur Mainline (BAM; БАМ) through eastern Russia from 1974 to 1986. The rail line opened in 1989, and runs between Ust-Kut (near Lake Baikal and Komsomolsk-on-Amur.  The official naming citation was published by the  Minor Planet Center before November 1977 ( ). M.P.C. 4482
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