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JPL Small-Body Database Browser
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20485 (1999 NJ54)
Classification: Main-belt Asteroid          SPK-ID: 2020485
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1748387943808387 4.9175e-08  
a 2.662401935190505 1.452e-08 au
q 2.196910790684585 1.2857e-07 au
i 13.26153247201999 5.4075e-06 deg
node 205.624169842166 1.622e-05 deg
peri 196.206646169263 1.9744e-05 deg
M 129.5542317427292 1.0514e-05 deg
tp 2458029.471269353381
(2017-Oct-02.97126935)
4.6145e-05 TDB
period 1586.751279888777
4.34
1.2981e-05
3.554e-08
d
yr
n .2268786573943928 1.856e-09 deg/d
Q 3.127893079696424 1.7059e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1155  
   data-arc span      9520 days (26.06 yr)  
   first obs. used      1993-04-17  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51615  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:52:41  

Additional Information
 Earth MOID = 1.20678 au 
 Jupiter MOID = 2.30321 au 
 T_jup = 3.325 
[ 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 14.1   n/a MPO337431  
diameter diameter 4.338 km 0.247 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.259   0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20485 (1999 NJ54)          Discovered 1999-Jul-12 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 NJ54 = 1996 CN = 1998 HV150 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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