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20184 (1997 AM4)
Classification: Main-belt Asteroid          SPK-ID: 2020184
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1519935493626029 3.4498e-08  
a 2.678655946159249 1.1102e-08 au
q 2.271517521381263 9.3836e-08 au
i 13.86062202153314 4.062e-06 deg
node 132.6068160173935 1.4957e-05 deg
peri 145.5992324099541 1.9727e-05 deg
M 26.69106502927398 1.1713e-05 deg
tp 2459081.776352079878
(2020-Aug-20.27635208)
5.2157e-05 TDB
period 1601.304151946249
4.38
9.9552e-06
2.726e-08
d
yr
n .2248167529962691 1.3977e-09 deg/d
Q 3.085794370937235 1.2789e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1593  
   data-arc span      9584 days (26.24 yr)  
   first obs. used      1994-06-12  
   last obs. used      2020-09-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48701  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:14:41  

Additional Information
 Earth MOID = 1.26655 au 
 Jupiter MOID = 2.15333 au 
 T_jup = 3.320 
[ 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 14.03   n/a E2021B10  
diameter diameter 5.127 km 0.471 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.203   0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20184 (1997 AM4)          Discovered 1997-Jan-06 by Kobayashi, T. at Oizumi
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 AM4 = 1998 HA2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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