98 Ianthe

98 Ianthe
Three-dimensional model of 98 Ianthe created based on light-curve.
Discovery
Discovered byChristian Heinrich Friedrich Peters
Discovery date18 April 1868
Designations
(98) Ianthe
Pronunciation/aɪˈænθiː/[1]
Named after
Ianthe
Main belt
AdjectivesIanthean /aɪənˈθiːən/[2]
Orbital characteristics[3]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc145.23 yr (53047 d)
Aphelion3.18807 AU (476.928 Gm)
Perihelion2.18872 AU (327.428 Gm)
2.68839 AU (402.177 Gm)
Eccentricity0.18586
4.41 yr (1610.0 d)
18.01 km/s
262.019°
0° 13m 24.949s / day
Inclination15.5778°
354.000°
158.686°
Earth MOID1.20327 AU (180.007 Gm)
Jupiter MOID1.81554 AU (271.601 Gm)
TJupiter3.296
Physical characteristics
Dimensions104.45±1.8 km[3]
106.16 ± 3.76 km[4]
Mass(8.93 ± 1.99) × 1017 kg[4]
Mean density
1.42 ± 0.35 g/cm3[4]
Equatorial surface gravity
0.0292 m/s²
Equatorial escape velocity
0.0552 km/s
16.479 h (0.6866 d)[3][5]
0.0471±0.002[3]
0.047 [6]
Temperature~170 K
C
8.84

98 Ianthe is a large main-belt asteroid, named for three figures in Greek mythology. It is very dark and is composed of carbonates. It was one of the numerous (for his time—the 19th century) discoveries by C. H. F. Peters, who found it on April 18, 1868, from Clinton, New York.

This body is orbiting the Sun with a period of 4.41 years and an eccentricity of 0.186. The orbital plane is inclined at an angle of 15.6° to the plane of the ecliptic. Measurements of the cross-section dimension yield a size of around 105 km. Photometric observations of this asteroid during 2007 at the Organ Mesa Observatory in Las Cruces, New Mexico were used to create a light curve plot. This showed a synodic rotation period of 16.479±0.001 hours and a brightness variation of 0.27±0.02 magnitude during each cycle.[5] It is classified as a C-type asteroid, indicating a dark, carbonaceous surface.

The detection of a candidate moon orbiting 98 Ianthe was announced in 2004.[7]

References

  1. ^ Benjamin Smith (1903) The Century Dictionary and Cyclopedia
  2. ^ Francis & Tatum (1924) Martial's Epigrams, p. 223
  3. ^ a b c d "98 Ianthe". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
  4. ^ a b c 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.
  5. ^ a b Pilcher, Frederick (June 2008), "Period Determination for 84 Klio, 98 Ianthe, 102 Miriam 112 Iphigenia, 131 Vala, and 650 Amalasuntha", The Minor Planet Bulletin, vol. 35, no. 2, pp. 71–72, arXiv:1203.4336, Bibcode:2008MPBu...35...71P, doi:10.1016/j.pss.2012.03.009.
  6. ^ Asteroid Data Sets Archived 2009-12-17 at the Wayback Machine
  7. ^ Venable, Roger (April 2004), "The probable detection of a moon of asteroid 98 Ianthe", Occultation Newsletter, 11 (2), International Occultation Timing Association: 8, Bibcode:2004OccN...11b...8V


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