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213057 (1999 NM54)
Classification: Main-belt Asteroid          SPK-ID: 2213057
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2309188299530694 5.2182e-08  
a 3.134953386139856 2.1365e-08 au
q 2.411033618255027 1.6651e-07 au
i 15.92620158546364 6.5384e-06 deg
node 224.0185567290139 1.322e-05 deg
peri 140.6910137982442 1.707e-05 deg
M 277.5095247045261 1.113e-05 deg
tp 2459665.064867646869
(2022-Mar-26.56486765)
6.5512e-05 TDB
period 2027.426218043009
5.55
2.0726e-05
5.674e-08
d
yr
n .1775650313664648 1.8152e-09 deg/d
Q 3.858873154024684 2.6299e-08 au
  Orbit Determination Parameters
   # obs. used (total)      733  
   data-arc span      7653 days (20.95 yr)  
   first obs. used      1999-07-12  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50593  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:41:10  

Additional Information
 Earth MOID = 1.43195 au 
 Jupiter MOID = 1.74313 au 
 T_jup = 3.112 
[ 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 14.29   n/a E2021B55  
diameter diameter 6.849 km 0.116 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.095   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

213057 (1999 NM54)          Discovered 1999-Jul-12 by LINEAR at Socorro
Reference: 20090509/Numbers.arcLast Updated: 2009-05-11

[ show close-approach data ]
Alternate Designations
 1999 NM54 = 1999 RD198 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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