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JPL Small-Body Database Browser
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71204 (1999 XQ242)
Classification: Main-belt Asteroid          SPK-ID: 2071204
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2069496084181984 3.8725e-08  
a 2.664460786473524 1.49e-08 au
q 2.113051670067183 1.0082e-07 au
i 14.19661063666034 6.0003e-06 deg
node 36.67132551619 1.7436e-05 deg
peri 123.4737179926117 2.282e-05 deg
M 124.0653589489255 1.4337e-05 deg
tp 2458053.029828430102
(2017-Oct-26.52982843)
6.2171e-05 TDB
period 1588.592202004588
4.35
1.3325e-05
3.648e-08
d
yr
n .2266157416269127 1.9009e-09 deg/d
Q 3.215869902879864 1.7983e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1033  
   data-arc span      11539 days (31.59 yr)  
   first obs. used      1987-01-03  
   last obs. used      2018-08-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47732  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 02:13:54  

Additional Information
 Earth MOID = 1.15464 au 
 Jupiter MOID = 1.86083 au 
 T_jup = 3.310 
[ 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 14.1   n/a MPO449449  
diameter diameter 4.835 km 0.425 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.228   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

71204 (1999 XQ242)          Discovered 1999-Dec-13 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XQ242 = 1987 AG = 1998 SK11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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