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35998 (1999 NP21)
Classification: Main-belt Asteroid          SPK-ID: 2035998
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0951831925769499 3.2953e-08  
a 2.430450479430914 1.0335e-08 au
q 2.199112443398501 7.9713e-08 au
i 7.18156574586974 3.8474e-06 deg
node 84.67215618205552 2.9925e-05 deg
peri 163.5095781883531 3.642e-05 deg
M 117.2950016807392 2.1315e-05 deg
tp 2458149.573667808657
(2018-Jan-31.07366781)
8.1492e-05 TDB
period 1383.97610522853
3.79
8.8275e-06
2.417e-08
d
yr
n .2601200979120624 1.6591e-09 deg/d
Q 2.661788515463327 1.1319e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1408  
   data-arc span      7540 days (20.64 yr)  
   first obs. used      1998-01-24  
   last obs. used      2018-09-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50916  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 19:17:48  

Additional Information
 Earth MOID = 1.18572 au 
 Jupiter MOID = 2.36053 au 
 T_jup = 3.491 
[ 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 14.3   n/a MPO358960  
diameter diameter 3.041 km 0.212 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.437   0.123 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

35998 (1999 NP21)          Discovered 1999-Jul-14 by LINEAR at Socorro
Reference: 20020227/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 NP21 = 2000 UR54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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