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18828 (1999 NT27)
Classification: Outer Main-belt Asteroid          SPK-ID: 2018828
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1148535763857011 3.4709e-08  
a 3.256767183564126 2.0444e-08 au
q 2.882715825076199 1.1262e-07 au
i 1.919488751206968 3.9118e-06 deg
node 77.20757220483979 0.00012917 deg
peri 218.868170746783 0.00013052 deg
M 197.7715682611318 1.9645e-05 deg
tp 2459967.893056499818
(2023-Jan-23.39305650)
0.00011851 TDB
period 2146.735295453729
5.88
2.0214e-05
5.534e-08
d
yr
n .1676965021082915 1.5791e-09 deg/d
Q 3.630818542052053 2.2792e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1521  
   data-arc span      9220 days (25.24 yr)  
   first obs. used      1994-10-08  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53486  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:54:18  

Additional Information
 Earth MOID = 1.8671 au 
 Jupiter MOID = 1.55403 au 
 T_jup = 3.169 
[ 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 13.6   n/a MPO337417  
diameter diameter 12.719 km 0.188 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.044   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18828 (1999 NT27)          Discovered 1999-Jul-14 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 NT27 = 1997 EW37 = 1998 HY139 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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