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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2072099765427543 3.4619e-08  
a 2.663692979379193 1.2868e-08 au
q 2.111749219604931 9.1262e-08 au
i 14.19727663123219 5.0342e-06 deg
node 36.66046861150261 1.3609e-05 deg
peri 123.38799259136 1.8019e-05 deg
M 214.867289675115 1.3299e-05 deg
tp 2459640.658447630308
(2022-Mar-02.15844763)
6.1277e-05 TDB
period 1587.905584006693
4.35
1.1507e-05
3.15e-08
d
yr
n .2267137313615509 1.6429e-09 deg/d
Q 3.215636739153454 1.5535e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1347  
   data-arc span      12351 days (33.82 yr)  
   first obs. used      1987-01-03  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45477  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:57:17  

Additional Information
 Earth MOID = 1.15301 au 
 Jupiter MOID = 1.86015 au 
 T_jup = 3.311 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457462.5 (2016-Mar-15.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2060614947244074 3.4876e-08  
q 2.116362055948142 9.1982e-08 au
tp 2458052.999028092663
(2017-Oct-26.49902809)
5.5561e-05 TDB
node 36.69397907833336 1.3596e-05 deg
peri 123.5287810432702 1.8021e-05 deg
i 14.20093157817531 5.0349e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1347  
   data-arc span      12351 days (33.82 yr)  
   first obs. used      1987-01-03  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45477  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:57:17  

Additional Information
 Jupiter MOID = 1.86015 au 
 T_jup = 3.311 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.216307103237409E-15 -3.188446133115307E-15 6.066772106012573E-13 8.336257063614538E-15 1.532267785364045E-13 1.532046337730837E-15
q -3.188446133115307E-15 8.460626041062165E-15 -1.370902117098566E-12 -2.213838654617799E-14 -3.648127120343538E-13 -3.626071026581495E-15
tp 6.066772106012573E-13 -1.370902117098566E-12 3.086986262635738E-9 5.926509503729254E-12 6.624207917692549E-10 6.438747609419724E-12
node 8.336257063614538E-15 -2.213838654617799E-14 5.926509503729254E-12 1.84839603771365E-10 -1.774199923366531E-10 -2.090619087560292E-12
peri 1.532267785364045E-13 -3.648127120343538E-13 6.624207917692549E-10 -1.774199923366531E-10 3.24752657493766E-10 3.420650583611894E-12
i 1.532046337730837E-15 -3.626071026581495E-15 6.438747609419724E-12 -2.090619087560292E-12 3.420650583611894E-12 2.535037613097113E-11

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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