306 Unitas
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| Discovery A | |
|---|---|
| Discoverer | Elia Millosevich |
| Discovery date | March 1, 1891 |
| Alternate designations B |
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| Category | Main belt |
| Orbital elements C | |
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|
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| Eccentricity (e) | 0.15 |
| Semi-major axis (a) | 352.798 Gm (2.358 AU) |
| Perihelion (q) | 299.81 Gm (2.004 AU) |
| Aphelion (Q) | 405.786 Gm (2.713 AU) |
| Orbital period (P) | 1322.79 d (3.62 a) |
| Mean orbital speed | 19.4 km/s |
| Inclination (i) | 7.267° |
| Longitude of the ascending node (Ω) |
142.046° |
| Argument of perihelion (ω) |
167.666° |
| Mean anomaly (M) | 26.267° |
| Physical characteristics D | |
| Dimensions | 47.0 km |
| Mass | unknown |
| Density | unknown |
| Surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | unknown |
| Spectral class | S |
| Absolute magnitude | 8.96 |
| Albedo (geometric) | unknown |
| Mean surface temperature |
unknown |
306 Unitas is a typical Main belt asteroid. It is classified as an S-type asteroid.
It was discovered by Elia Millosevich on March 1, 1891 in Rome. The asteroid was named by the director of the Modena Observatory in honor of the Italian astronomer Angelo Pietro Secchi. [1]
In the late 1990s, a network of astronomers worldwide gathered lightcurve data that was ultimately used to derive the spin states and shape models of 10 new asteroids, including (306) Unitas. [2][3] Lightcurve data has also been recorded by observers at the Antelope Hill Observatory, which has been designated as an official observatory by the Minor Planet Center.[4]
Although 306 Unitas has an orbit similar to the Vesta family asteroids, it was found to be an unrelated interloper on the basis of its non-matching spectral type.[citation needed]
[edit] References
- ^ Schmadel Lutz D. Dictionary of Minor Planet Names (fifth edition), Springer, 2003. ISBN-10: 3540002383.
- ^ Durech., J.; Kaasalainen, M., Marciniak, A.; et al., “Physical models of ten asteroids from an observers' collaboration network,” Astronomy and Astrophysics , Volume 465, Issue 1, April I 2007, pp. 331-337
- ^ Durech, J.; Kaasalainen, M.; Marciniak, A.; Allen, W. H. et al. “Asteroid brightness and geometry,” Astronomy and Astrophysics, Volume 465, Issue 1, April I 2007, pp. 331-337.
- ^ Lightcurve Results
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