| Minorplanet: | yes |
| Background: |
|
| 181 Eucharis | |
| Discovered: | 2 February 1878 |
| Mpc Name: | (181) Eucharis |
| Alt Names: | A878 CB; 1906 GA |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 3.12958AU |
| Perihelion: | 2.4928AU |
| Aphelion: | 3.7664abbr=onNaNabbr=on |
| Eccentricity: | 0.20347 |
| Period: | 5.54 yr (2022.2 d) |
| Inclination: | 18.890° |
| Asc Node: | 143.224° |
| Arg Peri: | 318.943° |
| Avg Speed: | 16.64 km/s |
| Rotation: | 52.23abbr=onNaNabbr=on |
| Spectral Type: | S (Tholen) Xk (Bus) |
| Abs Magnitude: | 7.84 |
| Albedo: | 4 |
| Mean Motion: | / day |
| Observation Arc: | 123.63 yr (45157 d) |
| Uncertainty: | 0 |
| Moid: | 1.53686AU |
| Jupiter Moid: | 1.47086AU |
| Tisserand: | 3.099 |
| Named After: | Eucharis |
181 Eucharis is a large, slowly rotating main-belt asteroid that was discovered by French astronomer Pablo Cottenot on February 2, 1878, from Marseille Observatory. It was his only asteroid discovery. This object was named after Eucharis, a nymph from the 17th-century novel Les Aventures de Télémaque.
In the Tholen classification system, it is categorized as a stony S-type asteroid, while the Bus asteroid taxonomy system lists it as an Xk asteroid. Photometric observations of this asteroid at the Goat Mountain Astronomical Research Station in Rancho Cucamonga, California during 2007 gave a light curve with a leisurely rotation period of 52.23 ± 0.05 hours.
This object is the namesake of a family of 149–778 asteroids that share similar spectral properties and orbital elements; hence they may have arisen from the same collisional event. All members have a relatively high orbital inclination.