| Minorplanet: | yes |
| 1844 Susilva | |
| Background: |
|
| Discovered: | 30 October 1972 |
| Mpc Name: | (1844) Susilva |
| Alt Names: | 1972 UB1943 EU 1953 AA1959 GJ |
| Named After: | Susi Petit–Pierre |
| Epoch: | 4 September 2017 (JD 2458000.5) |
| Uncertainty: | 0 |
| Observation Arc: | 64.40 yr (23,521 days) |
| Perihelion: | 2.8587 AU |
| Semimajor: | 3.0150 AU |
| Eccentricity: | 0.0518 |
| Period: | 5.24 yr (1,912 days) |
| Mean Motion: | / day |
| Inclination: | 11.788° |
| Asc Node: | 99.365° |
| Arg Peri: | 73.564° |
| Dimensions: | km 22.41 km km |
| Albedo: | 0.14 |
| Abs Magnitude: | 10.811.0 |
1844 Susilva, provisional designation, is a stony Eoan asteroid from the outer region of the asteroid belt, approximately 22 kilometers in diameter. It was discovered on 30 October 1972, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, and later named after a schoolfriend of the discoverer.
Susilva is a member of the Eos family, a collisional group of more than 4,000 asteroids, which are well known for mostly being of silicaceous composition. It orbits the Sun in the outer main-belt at a distance of 2.9–3.2 AU once every 5 years and 3 months (1,912 days). Its orbit has an eccentricity of 0.05 and an inclination of 12° with respect to the ecliptic.First identified as at Turku Observatory, Susilvas first used observation was taken at Uccle Observatory in 1953, extending the body's observation arc by 19 years prior to its official discovery observation.
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures between 19.0 and 26.8 kilometers in diameter, and its surface has an albedo of 0.118 to 0.236. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.14, taken from 221 Eos, the family's largest member and namesake – and calculates a diameter of 22.4 kilometers based on an absolute magnitude of 11.0. Susilvas rotation period has not yet been measured.
The discoverer named a pair of asteroids after two of his former schoolmates, Susi and Helen, both from the small village of Wald, Zürich in Switzerland. This one was dedicated to Susi Petit–Pierre, while the subsequently numbered asteroid, 1845 Helewalda, was given to Helen Gachnang. The official was published by the Minor Planet Center on 18 April 1977 .