105 Artemis

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105 Artemis
Discovery
Discovered by James Craig Watson
Discovery date 16 September 1868
Designations
MPC designation (105) Artemis
Named after
Artemis
Main belt
Adjectives Artemidean, Artemidian
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 100.79 yr (36812 d)
Aphelion 2.7952 AU (418.16 Gm)
Perihelion 1.95119 AU (291.894 Gm)
2.37319 AU (355.024 Gm)
Eccentricity 0.17782
3.66 yr (1335.4 d)
19.18 km/s
256.90°
0° 16m 10.524s / day
Inclination 21.444°
188.264°
57.077°
Earth MOID 1.00955 AU (151.027 Gm)
Jupiter MOID 2.31243 AU (345.935 Gm)
Jupiter Tisserand parameter 3.430
Physical characteristics
Dimensions 119.08±2.8 km[1]
119.10 ± 6.78 km[2]
Mass (1.54 ± 0.54) × 1018 kg[2]
Mean density
1.73 ± 0.67 g/cm3[2]
Equatorial surface gravity
0.0333 m/s²
Equatorial escape velocity
0.0630 km/s
37.15506 h (1.548128 d)[1]
37.15 h[3]
0.0465±0.002
Temperature ~180 K
C (Tholen)
Ch (Bus)[4]
8.57

105 Artemis is a main-belt asteroid that was discovered by J. C. Watson on September 16, 1868, at Ann Arbor, Michigan. It was named after Artemis, the goddess of the hunt, moon, and crossways in Greek Mythology.[5]

Several Artemidian stellar occultations have been reported. An occultation of the star HD 197999 was observed in 1982, which gave an estimated chord length of 110 km.[6] It is a C-type asteroid,[4] meaning that it is very dark and composed of carbonaceous material. Although is shares a similar orbit to the Phocaea family of S-type asteroids, its classification means 105 Artemis is not a member.[7]

In 1988, this object was detected with radar from the Arecibo Observatory at a distance of 1.07 AU. The measured radar cross-section was 1,800 km2.[8] Photometric measurement of this asteroid made in 2010 at Organ Mesa Observatory in Las Cruces, New Mexico, produced an irregular light curve with a period of 37.150 ± 0.001 hours. During each rotation, the brightness varies by 0.16 ± 0.01 in magnitude.[3]

Based upon radar data, the estimated near surface solid density of the asteroid is 3.0+0.9
−0.8
g cm−3.[9] Refined observations by the Arecibo Observatory, reported in 2006, showed a complex surface with varying albedo. Analysis of the spectra of 105 Artemis shows the presence of hydrated minerals at some rotation angles, but not at others.[10]

References[edit]

  1. ^ a b c Yeomans, Donald K., "105 Artemis", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016. 
  2. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336Freely accessible, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  3. ^ a b Pilcher, Frederick (October 2010), "New Lightcurves of 40 Harmonia and 105 Artemis", The Minor Planet Bulletin, 37 (4), p. 167, Bibcode:2010MPBu...37..167P. 
  4. ^ a b DeMeo, Francesca E.; et al. (2011), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus, 202 (1): 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, retrieved 2013-03-22.  See appendix A.
  5. ^ Schmade, Lutz (2003), Dictionary of Minor Planet Names, 1 (5th ed.), Springer, p. 25, ISBN 3540002383. 
  6. ^ Byrne, P. B.; et al. (September 1982), "Observations of the occultation of HD 197999 by the minor planet 105 Artemis", Monthly Notices of the Royal Astronomical Society, 200, p. 65P–68P, Bibcode:1982MNRAS.200P..65B, doi:10.1093/mnras/200.1.65p. 
  7. ^ Carruba, Valerio; et al. (September 2009), "An Analysis of the Region of the Phocaea Dynamical Family" (PDF), American Astronomical Society, DPS meeting #41, #27.04, Bibcode:2009DPS....41.2704C, retrieved 2013-03-18. 
  8. ^ Ostro, S. J.; et al. (October 1991), "Asteroid radar astrometry", Astronomical Journal, 102, pp. 1490–1502, Bibcode:1991AJ....102.1490O, doi:10.1086/115975. 
  9. ^ Magri, C.; et al. (December 2001), "Radar constraints on asteroid regolith compositions using 433 Eros as ground truth", Meteoritics & Planetary Science, 36 (12), pp. 1697–1709, Bibcode:2001M&PS...36.1697M, doi:10.1111/j.1945-5100.2001.tb01857.x. 
  10. ^ Hanson, Heather M.; et al. (December 2006), "Correlating Arecibo Radar and IRTF Near-Infrared Spectral Observations of 105 Artemis", Bulletin of the American Astronomical Society, 38, p. 933, Bibcode:2006AAS...209.2504H. 

External links[edit]