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20398 (1998 NQ)
Classification: Main-belt Asteroid          SPK-ID: 2020398
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03546360958374642 3.8558e-08  
a 2.63569646954791 1.4077e-08 au
q 2.542225158970604 1.0016e-07 au
i 15.50276706465501 4.3434e-06 deg
node 103.2620285982793 1.4806e-05 deg
peri 45.58662932050943 6.2914e-05 deg
M 221.797147295112 6.1825e-05 deg
tp 2459800.506597747008
(2022-Aug-09.00659775)
0.00026999 TDB
period 1562.937167803363
4.28
1.2521e-05
3.428e-08
d
yr
n .2303355550152816 1.8453e-09 deg/d
Q 2.729167780125215 1.4576e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1043  
   data-arc span      8758 days (23.98 yr)  
   first obs. used      1997-02-18  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51283  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:19:34  

Additional Information
 Earth MOID = 1.57305 au 
 Jupiter MOID = 2.38009 au 
 T_jup = 3.345 
[ 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 14.68   n/a E2021B10  
diameter diameter 2.703 km 0.309 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.265   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20398 (1998 NQ)          Discovered 1998-Jul-11 by Zoltowski, F. B. at Woomera
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 NQ = 1999 VX200 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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