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113 Amalthea (A871 EA)
Classification: Main-belt Asteroid          SPK-ID: 2000113
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 119 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08661680921402352 3.6906e-08  
a 2.37628787573138 3.2826e-09 au
q 2.170461402161558 8.759e-08 au
i 5.042979090689804 3.8809e-06 deg
node 123.4466581902112 4.7529e-05 deg
peri 78.68011430646946 5.3036e-05 deg
M 243.6948706781754 2.4461e-05 deg
tp 2459432.758331603593
(2021-Aug-06.25833160)
9.1202e-05 TDB
period 1337.971938853197
3.66
2.7724e-06
7.59e-09
d
yr
n .269063938895881 5.5752e-10 deg/d
Q 2.582114349301203 3.5669e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3024  
   data-arc span      54385 days (148.90 yr)  
   first obs. used      1871-03-12  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49606  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:17:25  

Additional Information
 Earth MOID = 1.17413 au 
 Jupiter MOID = 2.3844 au 
 T_jup = 3.531 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.5   n/a MPO502153 IRAS observations used: 9
magnitude slope G 0.35   n/a PDS3 (MPC 17257) Fit
diameter diameter 50.137 km 1.265 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.950 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Tungalag, N.; Shevchenko, V.G.; Lupishko, D.F. (2002) Kin. Fiz. Neb. Tel 18, 508-516; Kinematics and Physics of Celestial Bodies 18, ???-???.]
[Stephens, R.D. (2014) Minor Planet Bull. 41, 226-230.]
geometric albedo albedo 0.224   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.925   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=10; phase (min.=4.18, mean=16.18, max.=25.46) deg.
U-B UB 0.521   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=8; phase (min.=4.18, mean=15.84, max.=24.74) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

113 Amalthea (A871 EA)          Discovered 1871-Mar-12 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A871 EA = 1931 TN3 = 1951 CY 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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