105 Artemis

105 Artemis

Orbital diagram
Discovery
Discovered by	James Craig Watson
Discovery date	16 September 1868
Designations
MPC designation	(105) Artemis
Pronunciation	/ˈɑːrtɪmɪs/[1]
Named after	Artemis
Alternative designations	A868 SA
Minor planet category	Main belt
Adjectives	Artemidean / Artemidian /ɑːrtɪˈmɪdiən/[2][3] Artemisian /ɑːrtɪˈmɪziən/[4]
Orbital characteristics[5]
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)
Semi-major axis	2.37319 AU (355.024 Gm)
Eccentricity	0.17782
Orbital period (sidereal)	3.66 yr (1335.4 d)
Average orbital speed	19.18 km/s
Mean anomaly	256.90°
Mean motion	0° 16^m 10.524^s / day
Inclination	21.444°
Longitude of ascending node	188.264°
Argument of perihelion	57.077°
Earth MOID	1.00955 AU (151.027 Gm)
Jupiter MOID	2.31243 AU (345.935 Gm)
TJupiter	3.430
Physical characteristics
Dimensions	119.08±2.8 km[6]
Mass	(1.54 ± 0.54) × 10^18 kg[7]
Mean density	1.73 ± 0.67 g/cm^3[7]
Equatorial surface gravity	0.0333 m/s²
Equatorial escape velocity	0.0630 km/s
Synodic rotation period	37.15506 h (1.548128 d)[5] 37.15 h[8]
Geometric albedo	0.0465±0.002
Temperature	~180 K
Spectral type	C (Tholen) Ch (Bus)[9]
Absolute magnitude (H)	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 km^2.[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.

References

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. Yeomans, Donald K., "105 Artemis", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
6. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
7. Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
8. Pilcher, Frederick (October 2010), "New Lightcurves of 40 Harmonia and 105 Artemis", The Minor Planet Bulletin, vol. 37, no. 4, p. 167, Bibcode:2010MPBu...37..167P.
9. 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, archived from the original (PDF) on 17 March 2014, retrieved 22 March 2013. See appendix A.
10. Schmade, Lutz (2003), Dictionary of Minor Planet Names, vol. 1 (5th ed.), Springer, p. 25, ISBN 3540002383.
11. 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 18 March 2013.
12. Fornasier, S.; et al. (February 1999), "Spectroscopic comparison of aqueous altered asteroids with CM2 carbonaceous chondrite meteorites", Astronomy and Astrophysics Supplement, 135: 65–73, Bibcode:1999A&AS..135...65F, doi:10.1051/aas:1999161.
13. Ostro, S. J.; et al. (October 1991), "Asteroid radar astrometry", Astronomical Journal, vol. 102, pp. 1490–1502, Bibcode:1991AJ....102.1490O, doi:10.1086/115975.
14. Magri, C.; et al. (December 2001), "Radar constraints on asteroid regolith compositions using 433 Eros as ground truth", Meteoritics & Planetary Science, vol. 36, no. 12, pp. 1697–1709, Bibcode:2001M&PS...36.1697M, doi:10.1111/j.1945-5100.2001.tb01857.x.
15. 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, vol. 38, p. 933, Bibcode:2006AAS...209.2504H.
16. 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, vol. 200, p. 65P–68P, Bibcode:1982MNRAS.200P..65B, doi:10.1093/mnras/200.1.65p.

External links

• 105 Artemis at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 105 Artemis at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters