| Minorplanet: | yes |
| 2151 Hadwiger | |
| Background: |
|
| Discovery Ref: |   |
| Discovered: | 3 November 1977 |
| Mpc Name: | (2151) Hadwiger |
| Alt Names: | 1977 VX1932 UC 1940 SB1963 FF 1975 EA |
| Orbit Ref: |   |
| Epoch: | 4 September 2017 (JD 2458000.5) |
| Uncertainty: | 0 |
| Observation Arc: | 83.16 yr (30,374 days) |
| Perihelion: | 2.4145 AU |
| Semimajor: | 2.5608 AU |
| Eccentricity: | 0.0571 |
| Period: | 4.10 yr (1,497 days) |
| Mean Motion: | / day |
| Inclination: | 15.487° |
| Asc Node: | 27.926° |
| Arg Peri: | 86.794° |
| Rotation: | h |
| Spectral Type: | Tholen CSU  C  |
| Abs Magnitude: | 11.0 |
2151 Hadwiger, provisional designation, is a Marian asteroid from the central region of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 3 November 1977, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland.
Hadwiger orbits the Sun at a distance of 2.4–2.7 AU once every 4 years and 1 month (1,497 days). Its orbit has an eccentricity of 0.06 and an inclination of 15° with respect to the ecliptic. It is a member of the Maria family of asteroids.
In the Tholen classification, Hadwiger is a carbonaceous CSU-type. It has a rotation period of hours with a brightness variation of in magnitude.
This minor planet was named in memory of Swiss mathematician Hugo Hadwiger (1908–1981), professor at the University of Berne for more than 40 years and very popular for his refined art of presentation. The approved naming citation was published by the Minor Planet Center on 22 September 1983 .