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101887 (1999 NG42)
Classification: Main-belt Asteroid          SPK-ID: 2101887
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1887562027637009 4.6402e-08  
a 2.323625305492606 9.6341e-09 au
q 1.885026616182177 1.0922e-07 au
i 2.30141072260233 4.0864e-06 deg
node 314.1889153609388 0.00011919 deg
peri 30.01363934069285 0.0001197 deg
M 292.7149753780606 1.2085e-05 deg
tp 2459242.304004027071
(2021-Jan-27.80400403)
4.3774e-05 TDB
period 1293.74168975724
3.54
8.0461e-06
2.203e-08
d
yr
n .2782626569509026 1.7306e-09 deg/d
Q 2.762223994803034 1.1453e-08 au
  Orbit Determination Parameters
   # obs. used (total)      789  
   data-arc span      7698 days (21.08 yr)  
   first obs. used      1999-07-14  
   last obs. used      2020-08-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53622  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:59  

Additional Information
 Earth MOID = .877759 au 
 Jupiter MOID = 2.64325 au 
 T_jup = 3.551 
[ 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 16.1   n/a MPO436476  
diameter diameter 1.798 km 0.221 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.261   0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101887 (1999 NG42)          Discovered 1999-Jul-14 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 NG42 = 2002 JP17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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