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 date3 April 1872
Designations
(119) Althaea
Pronunciation /ælˈθə/ [1]
Named after
Althaea
A872 GA; 1972 KO
Main belt
Orbital characteristics [2]
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)
Average orbital speed
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)
TJupiter 3.413
Physical characteristics
Dimensions57.30±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) [2] [3]
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, [3] 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. [4] 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. [3]

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    References

    1. Noah Webster (1884) A Practical Dictionary of the English Language
    2. 1 2 Yeomans, Donald K., "119 Althaea", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory , retrieved 12 May 2016.
    3. 1 2 3 Hutton, R. G. (June 1990), "V+B Photoelectric Photometry of Asteroid 119 Althaea", The Minor Planet Bulletin, vol. 17, pp. 15–17, Bibcode:1990MPBu...17...15H.
    4. DeMeo, Francesca E.; et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus, vol. 202, no. 1, pp. 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, archived from the original (PDF) on 17 March 2014, retrieved 8 April 2013. See appendix A.