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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .114918955668835 3.2191e-08  
a 3.256294156362814 1.7591e-08 au
q 2.88208423256307 1.0684e-07 au
i 1.919416795652264 3.3711e-06 deg
node 77.20217017797634 0.00012214 deg
peri 218.9685860012329 0.00012335 deg
M 231.2029593568753 1.8969e-05 deg
tp 2459968.369212950114
(2023-Jan-23.86921295)
0.00011486 TDB
period 2146.267610511261
5.88
1.7392e-05
4.762e-08
d
yr
n .1677330442098246 1.3592e-09 deg/d
Q 3.630504080162559 1.9613e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1774  
   data-arc span      9664 days (26.46 yr)  
   first obs. used      1994-10-08  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51663  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:48:11  

Additional Information
 Earth MOID = 1.8645 au 
 Jupiter MOID = 1.55401 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 13.59   n/a MPCxxxxx  
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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