44 Nysa
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|
| Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html) | |
|---|---|
| Discoverer | H. Goldschmidt |
| Discovery date | May 27, 1857 |
| Alternate designations | 1977 CE B (http://cfa-www.harvard.edu/iau/MPDes.html) |
| Category | Main belt (Nysa) |
| Orbital elements C (http://asteroid.lowell.edu/) Epoch July 14, 2004 (JD 2453200.5) | |
| Eccentricity (e) | 0.149 |
| Semi-major axis (a) | 362.474 Gm (2.423 AU) |
| Perihelion (q) | 308.491 Gm (2.062 AU) |
| Aphelion (Q) | 416.457 Gm (2.784 AU) |
| Orbital period (P) | 1377.608 d (3.77 a) |
| Mean orbital speed | 19.13 km/s |
| Inclination (i) | 3.703° |
| Longitude of the ascending node (Ω) | 131.610° |
| Argument of perihelion (ω) | 342.519° |
| Mean anomaly (M) | 112.959° |
| Physical characteristics | |
| Dimensions | 70.6 km |
| Mass | 3.7×1017 kg |
| Density | 2.0 g/cm³ |
| Surface gravity | 0.0197 m/s² |
| Escape velocity | 0.0373 km/s |
| Rotation period | 0.2676 d 1 (http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm) |
| Spectral class | E |
| Absolute magnitude | 7.03 |
| Albedo | 0.546 2 (http://www.psi.edu/pds/archive/astdata/ALBEDOS/albedos.tab) |
| Mean surface temperature | ~151 K |
44 Nysa (nye'-sa) is a quite large and very bright main belt asteroid. It is also the brightest member of the Nysa asteroid family. It is classified as a rare class E asteroid.
It was discovered by H. Goldschmidt on May 27, 1857 and named after the mythical land of Nysa in Greek mythology.
The shape model constructed form the lightcurve of Nysa is conical, indicating that the asteroid may actually be a contact binary [1] (http://www.astro.helsinki.fi/~kaselain/AAlett.pdf).
Nysa has so far been reported occulting a star twice.
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