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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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1916-Jan-15 04:31 00:02 Jupiter 1.86617719280253 1.86617656622091 1.86617781940463 3.51125769906717 3.37952192972199 2420877.688080974 2.24965054730074 447.676866821094 14.7474215360232 -87.8394704019581 1541523.50388348 T 17 CATAB v2.0e-lin.ifort 2018-Oct-04 02:13:58 2018-Dec-17 17:09
1964-Feb-24 17:17 00:01 Jupiter 1.99556841834401 1.99556745196727 1.9955693847406 4.18989736701916 4.08733855188644 2438450.219899658 1.14793843852178 384.468279129262 20.6333727208231 -84.0902260910182 2062708.43813108 T 17 CATAB v2.0e-lin.ifort 2018-Oct-04 02:13:58 2018-Dec-17 17:09
1998-Apr-28 15:36 < 00:01 Jupiter 1.93183501715342 1.9318344735505 1.93183556075679 2.62801813898847 2.45551818416816 2450932.150211725 0.4594528527348 777.319587277193 24.8713676772599 -88.9300582154845 2312100.73040892 T 17 CATAB v2.0e-lin.ifort 2018-Oct-04 02:13:58 2018-Dec-17 17:09
2046-Jun-18 01:33 < 00:01 Jupiter 1.85369366063083 1.85369318994604 1.85369413131806 3.49007287395565 3.35659548764247 2468514.564549184 0.771315719895255 293.48892940893 16.3632704211146 -87.4705485359756 2205356.28228661 T 17 CATAB v2.0e-lin.ifort 2018-Oct-04 02:13:58 2018-Dec-17 17:09
2094-Jul-27 19:13 00:02 Jupiter 1.96072897855758 1.9607278808051 1.96073007634594 4.11214831607483 4.00571796620037 2486086.300512622 1.84114083629252 484.213182729914 19.1910733169076 -84.4510647141996 1996323.61178687 T 17 CATAB v2.0e-lin.ifort 2018-Oct-04 02:13:58 2018-Dec-17 17:09
2128-Sep-30 10:31 00:03 Jupiter 1.94437869858099 1.94437709148825 1.94438030669797 2.64997826794307 2.48014761708273 2498568.937879358 2.88067116178392 2659.05831761731 37.2658570205424 -87.6164885679724 2404459.27922178 T 17 CATAB v2.0e-lin.ifort 2018-Oct-04 02:13:58 2018-Dec-17 17:09
2176-Nov-19 21:25 00:04 Jupiter 1.84315414921871 1.84315363074704 1.84315466769143 3.48089714193379 3.3462731207767 2516151.392449680 3.7150500037608 430.52677467131 31.2106443773959 88.354217217225 1482708.64149558 T 17 CATAB v2.0e-lin.ifort 2018-Oct-04 02:13:58 2018-Dec-17 17:09

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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