Martha ( minor planet designation: 205 Martha) is a large

main belt The asteroid belt is a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies, of many sizes, but much smaller than planets, called ...

asteroid. It is a dark, primitive

carbonaceous Carbon () is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—its atom making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes up ...

C-type asteroid C-type (carbonaceous) asteroids are the most common variety, forming around 75% of known asteroids. They are volatile-rich and distinguished by a very low albedo because their composition includes a large amount of carbon, in addition to rocks ...

. This object was discovered by Johann Palisa on 13 October 1879, in

Pola Pola or POLA may refer to: People * House of Pola, an Italian noble family * Pola Alonso (1923–2004), Argentine actress * Pola Brändle (born 1980), German artist and photographer * Pola Gauguin (1883–1961), Danish painter * Pola Gojawiczyńsk ...

and was named after

Martha Martha (Hebrew: מָרְתָא‎) is a biblical figure described in the Gospels of Luke and John. Together with her siblings Lazarus and Mary of Bethany, she is described as living in the village of Bethany near Jerusalem. She was witness ...

, a woman in the

New Testament The New Testament grc, Ἡ Καινὴ Διαθήκη, transl. ; la, Novum Testamentum. (NT) is the second division of the Christian biblical canon. It discusses the teachings and person of Jesus, as well as events in first-century Chri ...

. Efforts to determine the rotation period for this asteroid have produced wildly different results, in large part because the actual period is close to half of an Earth day. A study performed during 2013 showed that the

light curve In astronomy, a light curve is a graph of light intensity of a celestial object or region as a function of time, typically with the magnitude of light received on the y axis and with time on the x axis. The light is usually in a particular frequ ...

changed significantly during the observation period, adding to the difficulty. This study gave a synodic rotation period of 14.905 ± 0.001 h.

References

External links

Lightcurve plot of 205 Martha
Palmer Divide Observatory, B. D. Warner (2010)
Asteroid Lightcurve Database (LCDB)
query form

)
Dictionary of Minor Planet Names
Google books

– Observatoire de Genève, Raoul Behrend

– Minor Planet Center * * 000205 Discoveries by Johann Palisa Named minor planets 000205 000205 18791013 {{C-beltasteroid-stub