105 Artemis

105 Artemis
Orbital diagram
Discovery
Discovered byJames Craig Watson
Discovery date16 September 1868
Designations
(105) Artemis
Pronunciation/ˈɑːrtɪmɪs/[1]
Named after
Artemis
A868 SA
Main belt
AdjectivesArtemidean / Artemidian /ɑːrtɪˈmɪdiən/[2][3] Artemisian /ɑːrtɪˈmɪziən/[4]
Orbital characteristics[5]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc100.79 yr (36812 d)
Aphelion2.7952 AU (418.16 Gm)
Perihelion1.95119 AU (291.894 Gm)
2.37319 AU (355.024 Gm)
Eccentricity0.17782
3.66 yr (1335.4 d)
19.18 km/s
256.90°
0° 16m 10.524s / day
Inclination21.444°
188.264°
57.077°
Earth MOID1.00955 AU (151.027 Gm)
Jupiter MOID2.31243 AU (345.935 Gm)
TJupiter3.430
Physical characteristics
Dimensions119.08±2.8 km[6]
Mass(1.54 ± 0.54) × 1018 kg[7]
Mean density
1.73 ± 0.67 g/cm3[7]
Equatorial surface gravity
0.0333 m/s²
Equatorial escape velocity
0.0630 km/s
37.15506 h (1.548128 d)[5]
37.15 h[8]
0.0465±0.002
Temperature~180 K
C (Tholen)
Ch (Bus)[9]
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.[10]

It is a C-type asteroid,[9] meaning that it is very dark and composed of carbonaceous material. Although it shares a similar orbit to the Phocaea family of S-type asteroids, its classification means 105 Artemis is not a member.[11] The spectra of the asteroid displays evidence of aqueous alteration.[12]

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.[13] 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.[8]

Based upon radar data, the estimated near surface solid density of the asteroid is 3.0+0.9
−0.8 g cm−3.[14] 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.[15]

An occultation of the star HD 197999 was observed in 1982, which gave an estimated chord length of 110 km.[16] Between 1981 and 2021, 105 Artemis has been observed to occult 23 stars.

  1. ^ Noah Webster (1884) A Practical Dictionary of the English Language
  2. ^ Sophocles (1902 trans.)
  3. ^ Dowden (1989) Death and the maiden: girls' initiation rites in Greek mythology
  4. ^ Fischer-Hansen & Poulsen (2009) From Artemis to Diana
  5. ^ a b Cite error: The named reference JPL was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMPS was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Carry2012 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Pilcher2010 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference DeMeo2011 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Schmade2003 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Carruba2009 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Fornasier1999 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Ostro1991 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Magri2001 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Hanson2006 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Byrne1982 was invoked but never defined (see the help page).