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Discovery
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| Discovered by | Max Wolf |
| Discovery date | December 22, 1891 |
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Designations
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| Alternate name | A923 JA; 1934 JC [1] |
| Minor planet category |
Main belt (Mars-crosser) |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 463.848 Gm (3.101 AU) |
| Perihelion | 248.71 Gm (1.663 AU) |
| Semi-major axis | 356.279 Gm (2.382 AU) |
| Eccentricity | 0.302 |
| Orbital period | 1342.443 d (3.68 a) |
| Average orbital speed | 18.9 km/s |
| Mean anomaly | 313.443° |
| Inclination | 24.227° |
| Longitude of ascending node | 97.463° |
| Argument of perihelion | 291.344° |
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Physical characteristics
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| Dimensions | 35.8 km |
| Mass | 4.8×1016 kg |
| Mean density | 2? g/cm³ |
| Equatorial surface gravity | 0.010 m/s² |
| Escape velocity | 0.019 km/s |
| Rotation period | 0.394 d (9.46 h) [2] |
| Albedo | 0.1765 [3] |
| Temperature | ~176 K |
| Spectral type | S |
| Absolute magnitude (H) | 9.73 |
323 Brucia (pronounced /ˈbruːsiə/ brew'-see-ə, or /ˈbruːʃə/ brew'-shə) was the first asteroid to be discovered by the use of astrophotography. It was also the first of over 200 asteroids discovered by Max Wolf, a pioneer in that method of finding astronomical objects. Discovered in 1891, it was named in honour of Catherine Wolfe Bruce, a noted patroness of the science of astronomy, who had donated $10,000 for the construction of the telescope used by Wolf.
It is also a Mars-crosser asteroid.
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