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Ianthe (minor planet designation: 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.

98 Ianthe
Three-dimensional model of 98 Ianthe created based on light-curve.
Discovery
Discovered byChristian Heinrich Friedrich Peters
Discovery date18 April 1868
Designations
MPC designation
(98) Ianthe
Pronunciation/aɪˈænθiː/[1]
Named after
Ianthe
Minor planet category
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)
Semi-major axis
2.68839 AU (402.177 Gm)
Eccentricity0.18586
Orbital period (sidereal)
4.41 yr (1610.0 d)
Average orbital speed
18.01 km/s
Mean anomaly
262.019°
Mean motion
0° 13m 24.949s / day
Inclination15.5778°
Longitude of ascending node
354.000°
Argument of perihelion
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
Synodic rotation period
16.479 h (0.6866 d)[3][5]
Geometric albedo
0.0471±0.002[3]
0.047 [6]
Temperature~170 K
Spectral type
C
Absolute magnitude (H)
8.84

    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. "98 Ianthe". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
    4. 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. 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, International Occultation Timing Association, 11 (2): 8, Bibcode:2004OccN...11b...8V


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    На других языках

    [de] (98) Ianthe

    (98) Ianthe ist ein Asteroid des Hauptgürtels, der am 18. April 1868 von dem deutsch-US-amerikanischen Astronomen Christian Heinrich Friedrich Peters entdeckt wurde[2].
    - [en] 98 Ianthe

    [es] (98) Ianthe

    (98) Ianthe es un asteroide que forma parte del cinturón de asteroides y fue descubierto el 18 de abril de 1868 por Christian Heinrich Friedrich Peters desde el observatorio Litchfield de Clinton, Estados Unidos. Se nombró por Yante, un personaje de la mitología griega.[2]

    [ru] (98) Ианта

    (98) Ианта (лат. Ianthe) — астероид главного пояса, который был открыт 18 апреля 1868 года американским астрономом Кристианом Петерсом в обсерватории Литчфилд, США и назван в честь Ианты, одной из океанид в древнегреческой мифологии[2].


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