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JPL Small-Body Database Browser
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986 Amelia (A922 UA)
Classification: Main-belt Asteroid          SPK-ID: 2000986
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2025245870778212 3.5596e-08  
a 3.1328932924197 1.5043e-08 au
q 2.498405372013525 1.1193e-07 au
i 14.81446432982608 4.7441e-06 deg
node 92.6009539711211 1.5999e-05 deg
peri 265.5626360073572 1.9746e-05 deg
M 139.6263903358379 1.3369e-05 deg
tp 2457814.935514785464
(2017-Mar-02.43551479)		 7.2805e-05 TDB
period 2025.428101356896
5.55		 1.4588e-05
3.994e-08		 d
yr
n .1777402020633687 1.2802e-09 deg/d
Q 3.767381212825875 1.809e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2424  
   data-arc span      34150 days (93.50 yr)  
   first obs. used      1926-05-16  
   last obs. used      2019-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44029  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:15:24  

Additional Information
 Earth MOID = 1.54763 au 
 Jupiter MOID = 1.93012 au 
 T_jup = 3.130 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.4   n/a MPO384754  
diameter diameter 48.677 km 0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.52 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Koff, R.A. (2001) Minor Planet Bull. 28, 77-78.]
[Almeida, R.; Angeli, C.A.; Duffard, R.; Lazzaro, D. (2004) Astron. Astrophys. 415, 403-406.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.218   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

986 Amelia (A922 UA)          Discovered 1922-Oct-19 by Comas Sola, J. at Barcelona
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A922 UA = 1935 BK = 1966 VA = A915 JC 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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