It is classified as a rare E-type asteroid and is fairly faint for an object of its type. The overall diameter is estimated to be 23 km and it has a geometric albedo of 0.52.[3]Photometric data collected during September 2021 was used the generate a lightcurve for 214 Aschera. This showed a rotation period of 6.833±0.004 h with a brightness variation of 0.20 magnitude.[4] Using a tri-axial ellipsoidal model derived from light curve data, the overall shape of the asteroid is estimated to be a/b = 1.24 ± 0.12 and b/c = 1.83 ± 0.10, where a, b, c are the three axes of an ellipsoid.[5]
^Farfan, Rafael Gonzalez; et al. (April 2022), "The Rotation Periods of 3 Juno, 28 Bellona, 129 Antigone, 214 Aschera, 237 Coelestina, 246 Asporina, 382 Dodona, 523 Ada, 670 Ottegebe, 918 Itha, 1242 Zambesia, 1352 Wawel, 1358 Gaika, 4155 Watanabe, and 6097 Koishikawa", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, 49 (2): 136–140, Bibcode:2022MPBu...49..136F.
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