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78121 (2002 NF4)
Classification: Main-belt Asteroid          SPK-ID: 2078121
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1425169031065581 4.9048e-08  
a 3.05690818749692 2.2176e-08 au
q 2.621247099533778 1.4696e-07 au
i .3804537515156208 5.4539e-06 deg
node 162.5030485448949 0.00076385 deg
peri 181.3200632603877 0.00076409 deg
M 88.05872001439066 1.8267e-05 deg
tp 2458522.979646653157
(2019-Feb-08.47964665)
9.7977e-05 TDB
period 1952.189711328647
5.34
2.1243e-05
5.816e-08
d
yr
n .1844083072003214 2.0066e-09 deg/d
Q 3.492569275460063 2.5336e-08 au
  Orbit Determination Parameters
   # obs. used (total)      414  
   data-arc span      8228 days (22.53 yr)  
   first obs. used      1997-06-09  
   last obs. used      2019-12-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57194  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:28:10  

Additional Information
 Earth MOID = 1.61354 au 
 Jupiter MOID = 1.90949 au 
 T_jup = 3.219 
[ 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 15.6   n/a MPO453201  
diameter diameter 4.339 km 1.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.041   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

78121 (2002 NF4)          Discovered 2002-Jul-01 by NEAT at Palomar
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2002 NF4 = 1997 LJ6 = 2000 EU72 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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