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113 Amalthea
Classification: Main-belt Asteroid          SPK-ID: 2000113
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 91 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0863560789201171 3.0998e-08  
a 2.376265252631915 4.1391e-09 AU
q 2.171060302940502 7.3787e-08 AU
i 5.04241237489737 3.5073e-06 deg
node 123.4910994988984 4.4422e-05 deg
peri 78.98317426197801 4.8196e-05 deg
M 65.19016788077025 1.8899e-05 deg
tp 2456758.218417412695
(2014-Apr-10.71841741)
7.0153e-05 JED
period 1337.952831950881
3.66
3.4957e-06
9.571e-09
d
yr
n .2690677813171342 7.0301e-10 deg/d
Q 2.581470202323329 4.4965e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1889  
   data-arc span      52382 days (143.41 yr)  
   first obs. used      1871-03-12  
   last obs. used      2014-08-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58105  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:33:47  

Additional Information
 Earth MOID = 1.17603 AU 
 T_jup = 3.531 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.74 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
magnitude slope G 0.35   n/a PDS3 (MPC 17257) Fit
diameter diameter 46.14 km 1.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
rotation period rot_per 9.935 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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, ???-???.]
geometric albedo albedo 0.2649   0.017 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
B-V BV .925 mag .026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=10; phase (min.=4.18, mean=16.18, max.=25.46) deg.
U-B UB .521 mag .025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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          Discovered 1871-Mar-12 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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