55 Pandora

For the moon of Saturn, see Pandora (moon).

55 Pandora

Lightcurve-based 3D-model of Pandora
Discovery
Discovered by	George Mary Searle
Discovery site	Albany, New York
Discovery date	September 10, 1858
Designations
MPC designation	(55) Pandora
Pronunciation	/pænˈdɔːrə/[1]
Named after	Pandora
Minor planet category	Main belt
Adjectives	Pandorian /pænˈdɔːriən/[2]
Symbol	(astrological)
Orbital characteristics[3]
Epoch June 27, 2015
Aphelion	3.152 AU (471.5 Gm)
Perihelion	2.367 AU (354.1 Gm)
Semi-major axis	2.760 AU (412.9 Gm)
Eccentricity	0.142
Orbital period (sidereal)	4.58 yr (1,674 d)
Mean anomaly	61.834°
Inclination	7.186°
Longitude of ascending node	10.432°
Argument of perihelion	3.944°
Physical characteristics
Dimensions	66.7 km
Mass	3.1×10^17 kg
Synodic rotation period	4.8040 h [3]
Geometric albedo	0.301 [3]
Spectral type	M[4]
Absolute magnitude (H)	7.7

55 Pandora is a fairly large and very bright asteroid in the asteroid belt. Pandora was discovered by American astronomer and Catholic priest George Mary Searle on September 10, 1858, from the Dudley Observatory near Albany, NY.^[5] It was his first and only asteroid discovery.

It is named after Pandora, the first woman in Greek mythology, who unwisely opened a box that released evil into the world. The name was apparently chosen by Blandina Dudley, widow of the founder of the Dudley Observatory, who had been involved in an acrimonious dispute with astronomer B. A. Gould. Gould felt that the name had an "apt significance".^[6] The asteroid shares its name with Pandora, a moon of Saturn.

This object is orbiting the Sun with a period of 4.58 years, a semimajor axis of 2.76 AU, and an eccentricity of 0.14. Its orbital plane lies at an angle of 7.2° to the plane of the ecliptic. Photometric observations of this asteroid at the Rozhen Observatory in Bulgaria during 2010 gave a light curve with a period of 4.7992 hours and a brightness variation of Δm=0.22 mag. This is consistent with a period of 4.804 hours and an amplitude of 0.24 obtained during a 1977 study.^[7] It has a cross-sectional size of 66.7 km.

See also

• Aubrite
• 3103 Eger
• 2867 Šteins

References

1. "Pandora". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
2. John Krumpelmann (1959) Bayard Taylor and German Letters, p. 122
3. "55 Pandora". JPL Small-Body Database Browser. NASA Jet Propulsion Laboratory. Retrieved 14 September 2015.
4. Britt, Daniel; et al. (November 2014), "Space Weathering in Olivine and the Mineralogy of (Some) M-Class Asteroids", American Astronomical Society, DPS meeting #46, vol. 46, Bibcode:2014DPS....4650601B, 506.01.
5. "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
6. Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names. Springer Science & Business Media. p. 20. ISBN 978-3-540-00238-3.
7. Radeva, V.; et al. (2011), "Rotation periods of the asteroids 55 Pandora, 78 Diana and 815 Coppelia", Bulgarian Astronomical Journal, vol. 17, no. 2, pp. 133–141, Bibcode:2012MPBu...39...57P.

External links

• 55 Pandora at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 55 Pandora at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters