113 Amalthea

113 Amalthea
Orbital diagram
Discovery
Discovered byR. Luther
Discovery siteBilk Obs.
Discovery date12 March 1871
Designations
(113) Amalthea
Pronunciation/æməlˈθə/
Named after
Amalthea
A871 EA; 1931 TN3;
1951 CY
main-belt · Flora
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc144.90 yr (52926 d)
Aphelion2.5819 AU (386.25 Gm)
Perihelion2.17010 AU (324.642 Gm)
2.37598 AU (355.442 Gm)
Eccentricity0.086651
3.66 yr (1337.7 d)
226.48°
0° 16m 8.832s / day
Inclination5.0422°
123.486°
79.118°
Physical characteristics
46.14±1.4 km
9.950 h (0.4146 d)
0.2649±0.017
S
8.74

113 Amalthea (/æməlˈθə/) is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 50 kilometers (31 miles) in diameter. It was discovered on 12 March 1871, by German astronomer Robert Luther at the Bilk Observatory in Düsseldorf, Germany. The elongated S-type asteroid has a rotation period of 9.95 hours. It was named after Amalthea from Greek mythology. A purported satellite of Amalthea was announced in July 2017, but was later found to be a software error in July 2021.[2]

  1. ^ Cite error: The named reference JPL was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference CBET5002 was invoked but never defined (see the help page).