Alexander Nikolaevich Deutsch (Aleksandr Nikolaevič Dejč; Russian: Александр Николаевич Дейч; December 31, 1899 – 22 November 1986[2]) was a Soviet astronomer who worked at Pulkovo Observatory.
Deutsch was born in the night from December 31, 1899, to January 1, 1900, in the Bessarabian town of Reni in a family of Volga German[3] (on his father's side), Greek and Romanian (on his mother's side) descent.
His main scientific contributions refer to stars' proper motions in selected Kapteyn surfaces, astrophotography of galaxies and stars, brown dwarfs, astronomical calculations of the coordinates of warships, eclipses and asteroids photography.
Deutsch (Deich) was а president of the IAU Astrometry commission.
The asteroid Reni, discovered by L. S. Chernyh, was named in honor of A. N. Deutsch (Deich).