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78145 (2002 NL21)
Classification: Main-belt Asteroid          SPK-ID: 2078145
[ 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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07939000728270189 4.4952e-08  
a 2.930573512910274 2.2762e-08 au
q 2.697915260377834 1.2936e-07 au
i 10.02238557842086 4.7135e-06 deg
node 263.5738558616469 2.5933e-05 deg
peri 55.63509528307601 4.1093e-05 deg
M 188.5503796288484 3.5214e-05 deg
tp 2459873.192782108734
(2022-Oct-20.69278211)		 0.00018464 TDB
period 1832.429846616371
5.02		 2.1349e-05
5.845e-08		 d
yr
n .1964604542240726 2.2889e-09 deg/d
Q 3.163231765442713 2.4569e-08 au
   Orbit Determination Parameters
   # obs. used (total)      706  
   data-arc span      9657 days (26.44 yr)  
   first obs. used      1993-12-13  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5301  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:28:05  

Additional Information
 Earth MOID = 1.69893 au 
 Jupiter MOID = 2.06222 au 
 T_jup = 3.249 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457392.5 (2016-Jan-05.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07834644815753165 4.4929e-08  
q 2.702333340311512 1.2893e-07 au
tp 2458036.717313407315
(2017-Oct-10.21731341)		 0.00017599 TDB
node 263.6267125308668 2.5943e-05 deg
peri 54.72111744249654 4.1385e-05 deg
i 10.01784335471906 4.7124e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      706  
   data-arc span      9657 days (26.44 yr)  
   first obs. used      1993-12-13  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5301  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:28:05  

Additional Information
 Jupiter MOID = 2.06222 au 
 T_jup = 3.249 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.018649247474584E-15 -5.717968274753843E-15 6.806777481004662E-13 2.752054088459314E-16 8.312184303016533E-14 2.688988263201986E-15
q -5.717968274753843E-15 1.662417671392736E-14 -2.49338820561597E-13 -1.962611481352669E-15 4.769366490725381E-14 -7.188950666445787E-15
tp 6.806777481004662E-13 -2.49338820561597E-13 3.097331912633907E-8 3.603602214774697E-13 5.695147320938798E-9 2.406919774814282E-12
node 2.752054088459314E-16 -1.962611481352669E-15 3.603602214774697E-13 6.730328746546866E-10 -6.623252779816804E-10 1.98294916161643E-11
peri 8.312184303016533E-14 4.769366490725381E-14 5.695147320938798E-9 -6.623252779816804E-10 1.712697934034174E-9 -1.905753150343638E-11
i 2.688988263201986E-15 -7.188950666445787E-15 2.406919774814282E-12 1.98294916161643E-11 -1.905753150343638E-11 2.220629662361357E-11

[ 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 14.8   n/a MPO417365  
diameter diameter 7.135 km 0.176 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.046   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

78145 (2002 NL21)          Discovered 2002-Jul-09 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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