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187761 (1997 NX4)
Classification: Main-belt Asteroid          SPK-ID: 2187761
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3046232737475131 3.163e-08  
a 3.118368245482377 1.9746e-08 au
q 2.168440701793247 9.8874e-08 au
i 14.5802711739115 4.4946e-06 deg
node 117.3673032638512 1.9567e-05 deg
peri 202.6008167433111 2.1653e-05 deg
M 63.81406695767998 9.0123e-06 deg
tp 2458843.963949908216
(2019-Dec-26.46394991)
4.8766e-05 TDB
period 2011.35868864404
5.51
1.9104e-05
5.23e-08
d
yr
n .1789834911259386 1.7e-09 deg/d
Q 4.068295789171508 2.5761e-08 au
  Orbit Determination Parameters
   # obs. used (total)      570  
   data-arc span      8616 days (23.59 yr)  
   first obs. used      1997-07-07  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48074  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:56:44  

Additional Information
 Earth MOID = 1.16019 au 
 Jupiter MOID = 1.28475 au 
 T_jup = 3.096 
[ 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 14.9   n/a MPO475582  
diameter diameter 5.423 km 0.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.104   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

187761 (1997 NX4)          Discovered 1997-Jul-08 by ODAS at Caussols
Reference: 20080618/Numbers.arcLast Updated: 2008-06-20

[ show close-approach data ]
Alternate Designations
 1997 NX4 = 2003 SE114 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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