119 Althaea

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119 Althaea
119Althaea (Lightcurve Inversion).png
A three-dimensional model of 119 Althaea based on its light curve.
Discovery
Discovered by James Craig Watson
Discovery date 3 April 1872
Designations
Named after
Althaea
Main belt
Orbital characteristics[1]
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)
Eccentricity 0.080623
4.15 yr (1515.0 d)
18.51 km/s
114.868°
0° 14m 15.472s / day
Inclination 5.7831°
203.674°
170.021°
Earth MOID 1.37297 AU (205.393 Gm)
Jupiter MOID 2.58409 AU (386.574 Gm)
Jupiter Tisserand parameter 3.413
Physical characteristics
Dimensions 57.30±1.1 km
Mass 2.0×1017 kg
Equatorial surface gravity
0.0160 m/s²
Equatorial escape velocity
0.0303 km/s
11.484 h (0.4785 d)[1][2]
0.2306±0.010
Temperature ~173 K
S
8.42

119 Althaea is a main-belt asteroid that was discovered by Canadian-American astronomer J. C. Watson on April 3, 1872,[2] 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.[3] 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.[2]

References[edit]

  1. ^ a b Yeomans, Donald K., "119 Althaea", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016. 
  2. ^ a b c Hutton, R. G. (June 1990), "V+B Photoelectric Photometry of Asteroid 119 Althaea", The Minor Planet Bulletin, 17, pp. 15–17, Bibcode:1990MPBu...17...15H. 
  3. ^ DeMeo, Francesca E.; et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus, 202 (1), pp. 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, retrieved 2013-04-08.  See appendix A.

External links[edit]