It is a stony asteroid and a Mars-crosser, approximately 7 kilometers in diameter. It was discovered on 1 August 1981, by the Harvard's Oak Ridge Observatory (Agassiz Station)

https://en.wikipedia.org/wiki/3401_Vanphilos

The Harvard College Observatory (HCO) is an institution with multiple instruments used for astronomical research by the Harvard University Department of Astronomy. It is located in Cambridge, Massachusetts, United States, and was founded in 1839

https://en.wikipedia.org/wiki/Harvard_College_Observatory

Distance from the Sun (au) : 1,58

Time: 23:58UT 2025-10-18 Exp. 13 x 6 sec.
Tel. 0.254m f/5.8 ST-10XME CCD @ -35°C 0.95"/pix
Odd Trondal Obs.code 238 (Uranium). Oslo Norway.