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196 Philomela

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196 Philomela
196Philomela (Lightcurve Inversion).png
A three-dimensional model of 196 Philomela based on its light curve.
Discovery
Discovered by C. H. F. Peters, 1879
Discovery date14 May 1879
Designations
(196) Philomela
Pronunciation /fɪloʊˈmiːlə/ [1]
A879 JA; 1934 JO
Main belt
Adjectives Philomelian /fɪloʊˈmiːliən/ [1]
Orbital characteristics [2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 136.91 yr (50005 d)
Aphelion 3.1723  AU (474.57  Gm)
Perihelion 3.0630 AU (458.22 Gm)
3.1177 AU (466.40 Gm)
Eccentricity 0.017530
5.50 yr (2010.7 d)
276.49°
0° 10m 44.544s / day
Inclination 7.2554°
72.384°
195.69°
Earth  MOID 2.04771 AU (306.333 Gm)
Jupiter  MOID 1.83421 AU (274.394 Gm)
TJupiter 3.204
Physical characteristics
Dimensions 136.39±6.3  km [2]
145.29 ± 7.71 km [3]
Mass (4.00 ± 1.53) × 1018 kg [3]
Mean density
2.48 ± 1.02 g/cm3 [3]
8.3340  h (0.34725  d) [2]
8.332827 hours [4]
0.2299±0.023
S [5]
6.54

196 Philomela is a large and bright main-belt asteroid. It was discovered by C. H. F. Peters on May 14, 1879, in Clinton, New York. The asteroid is named after Philomela, the woman who became a nightingale in Greek mythology. [6]

This object is orbiting the Sun at a distance of 3.12  AU with a low eccentricity of 0.018 and an orbital period of 5.50 years. The orbital plane is inclined at an angle of 7.26° to the plane of the ecliptic. This is a stony S-type asteroid [5] with a diameter of approximately 145 km. It is spinning with a rotation period of 8.334 hours. [2]

In the late 1990s, a network of astronomers worldwide gathered light curve data that was ultimately used to derive the spin states and shape models of 10 new asteroids, including 196 Philomela. The shape model for this asteroid is described as asymmetrical and smooth, while the light curve varies by up to 0.4 in magnitude. [4] [7]

To date there have been two reported Philomelian stellar occultations.[ citation needed ]

References

  1. 1 2 "Philomel, Philomela" . Oxford English Dictionary (Online ed.). Oxford University Press.(Subscription or participating institution membership required.)
  2. 1 2 3 4 "196 Philomela". JPL Small-Body Database . NASA/Jet Propulsion Laboratory . Retrieved 12 May 2016.
  3. 1 2 3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv: 1203.4336 , Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
  4. 1 2 Durech, J.; et al. (April 2007), "Physical models of ten asteroids from an observers' collaboration network", Astronomy and Astrophysics, 465 (1): 331–337, Bibcode:2007A&A...465..331D, doi: 10.1051/0004-6361:20066347 .
  5. 1 2 Busarev, V. V. (February 2011). "Asteroids 10 Hygiea, 135 Hertha, and 196 Philomela: Heterogeneity of the material from the reflectance spectra". Solar System Research. 45 (1): 43–52. Bibcode:2011SoSyR..45...43B. doi:10.1134/S0038094610061036.
  6. ↑ Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names (fifth ed.). Springer. ISBN   3-540-00238-3..
  7. ↑ Durech, J.; Kaasalainen, M.; Marciniak, A.; Allen, W. H.; et al. (April 2007). "Asteroid brightness and geometry". Astronomy and Astrophysics. 465 (1): 331–337.
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