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Discovery
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| Discovered by | van Houten, van Houten-Groeneveld & Gehrels |
| Discovery date | September 29, 1973 |
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Designations
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| Alternate name(s) | 4171 T-2; 4386 T-3 |
| Minor planet category |
Sulamitis family 1 |
| Epoch May 10, 2005 (JD 2453500.5) | |
| Aphelion | 397.864 Gm (2.660 AU) |
| Perihelion | 337.358 Gm (2.255 AU) |
| Semi-major axis | 367.611 Gm (2.457 AU) |
| Eccentricity | 0.082 |
| Orbital period | 1406.997 d (3.85 a) |
| Average orbital speed | 18.97 km/s |
| Mean anomaly | 171.587° |
| Inclination | 5.555° |
| Longitude of ascending node | 138.497° |
| Argument of perihelion | 121.157° |
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Physical characteristics
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| Dimensions | 4? km |
| Mass | 6.7×1013 kg |
| Mean density | 2? g/cm³ |
| Equatorial surface gravity | 0.0011 m/s² |
| Escape velocity | 0.0021 km/s |
| Rotation period | ? d |
| Albedo | 0.10? |
| Temperature | ~178 K |
| Spectral type | ? |
| Absolute magnitude (H) | 15.1 |
10979 Fristephenson is a small main belt asteroid named for F. Richard Stephenson, a British astronomer at the University of Durham.
It was discovered on September 29, 1973 by Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld at Leiden University, analysing photographs made by Tom Gehrels with the 48" Schmidt telescope at Palomar Observatory.
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