| Minorplanet: | yes |
| 2111 Tselina | |
| Background: |
|
| Discovery Ref: |   |
| Discovered: | 13 June 1969 |
| Mpc Name: | (2111) Tselina |
| Alt Names: | 1969 LG1928 RS 1928 SO 1975 RE 1976 YF |
| Named After: | Virgin Lands Campaign |
| Mp Category: | main-belt Eos  |
| Orbit Ref: |   |
| Epoch: | 4 September 2017 (JD 2458000.5) |
| Uncertainty: | 0 |
| Observation Arc: | 48.47 yr (17,703 days) |
| Perihelion: | 2.7299 AU |
| Semimajor: | 3.0170 AU |
| Eccentricity: | 0.0952 |
| Period: | 5.24 yr (1,914 days) |
| Mean Motion: | / day |
| Inclination: | 10.503° |
| Asc Node: | 167.17° |
| Arg Peri: | 232.54° |
| Mean Diameter: | km km km |
| Albedo: | |
| Spectral Type: | Tholen S S  B–V 0.799  U–B 0.463  |
| Abs Magnitude: | 10.45 |
2111 Tselina (prov. designation:) is a stony Eos asteroid from the outer regions of the asteroid belt. It was discovered on 13 June 1969, by Soviet astronomer Tamara Smirnova at Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. The S-type asteroid has a rotation period of 6.6 hours and measures approximately 23abbr=offNaNabbr=off in diameter. It was later named after the Soviet Virgin Lands Campaign.
Tselina is a member of the Eos family, the largest asteroid family in the outer main belt consisting of nearly 10,000 asteroids. It orbits the Sun at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,914 days). Its orbit has an eccentricity of 0.10 and an inclination of 11° with respect to the ecliptic. In 1929, Tselina was first observed as and by the German and Belgian observatories at Hamburg and Uccle, respectively. The body's observation arc begins at the discovering observatory in 1968, or one year prior to its official discovery.
This minor planet was named after the tselina lands to commemorate the 25th anniversary of the Soviet Virgin Lands Campaign. The campaign was launched by Nikita Khrushchev in 1953, with the intention to significantly increase the agricultural production in the USSR. The word "tselina" (or tseliny) means "virgin soil". The official naming citation was published by the Minor Planet Center on 1 April 1980 .
In the Tholen classification, Tselina is a common, stony S-type asteroid.
In September 2001, a rotational lightcurve of Tselina was obtained from photometric observations by French amateur astronomer Laurent Bernasconi. Lightcurve analysis gave a well-defined rotation period of hours with a brightness variation of 0.17 magnitude . In September 2012, observations by astronomers at the Palomar Transient Factory, California, gave a concurring period of hours with an amplitude of 0.29 magnitude .
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Tselina measures between 22.773 and 33.02 kilometers in diameter and its surface has an albedo between 0.13 and 0.226. The Collaborative Asteroid Lightcurve Link agrees with the results obtained by IRAS, that is, an albedo of 0.1938 and a diameter of 24.54 kilometers with an absolute magnitude of 10.45.