A three-dimensional model of 119 Althaea based on its light curve.
|Discovered by||James Craig Watson|
|Discovery date||3 April 1872|
|Epoch 31 July 2016 (JD 2457600.5)|
|Uncertainty parameter 0|
|Observation arc||143.99 yr (52593 d)|
|Aphelion||2.7896 AU (417.32 Gm)|
|Perihelion||2.37335 AU (355.048 Gm)|
|2.58147 AU (386.182 Gm)|
|4.15 yr (1515.0 d)|
Average orbital speed
|0° 14m 15.472s / day|
|Earth MOID||1.37297 AU (205.393 Gm)|
|Jupiter MOID||2.58409 AU (386.574 Gm)|
Equatorial surface gravity
Equatorial escape velocity
|11.484 h (0.4785 d)|
Althaea (minor planet designation: 119 Althaea) is a main-belt asteroid that was discovered by Canadian-American astronomer J. C. Watson on April 3, 1872, and named after Althaea, the mother of Meleager in Greek mythology. Two occultations by Althaea were observed in 2002, only a month apart.
Based upon its spectrum, this is classified as an S-type asteroid. Photometric observations made in 1988 at the Félix Aguilar Observatory produced a light curve with a period of 11.484 ± 0.010 hours with a brightness variation of 0.365 ± 0.010 in magnitude.
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