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JPL Small-Body Database Browser
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154739 (2004 NP21)
Classification: Main-belt Asteroid          SPK-ID: 2154739
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2091547562317735 4.1923e-08  
a 2.383290808380192 1.2365e-08 au
q 1.884814200324007 9.5382e-08 au
i 4.072722129870443 4.8369e-06 deg
node 148.0541183220381 5.6214e-05 deg
peri 122.8348902569444 5.7692e-05 deg
M 139.2472871027001 1.3877e-05 deg
tp 2458480.685696125978
(2018-Dec-28.18569613)
4.9598e-05 TDB
period 1343.890809568378
3.68
1.0459e-05
2.864e-08
d
yr
n .2678789061111465 2.0848e-09 deg/d
Q 2.881767416436378 1.4952e-08 au
  Orbit Determination Parameters
   # obs. used (total)      475  
   data-arc span      9602 days (26.29 yr)  
   first obs. used      1993-08-14  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62351  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 13:30:03  

Additional Information
 Earth MOID = .872446 au 
 Jupiter MOID = 2.23528 au 
 T_jup = 3.504 
[ 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 16.3   n/a MPO436783  

154739 (2004 NP21)          Discovered 2004-Jul-15 by LINEAR at Socorro
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04

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