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173879 (2001 UR42)
Classification: Main-belt Asteroid          SPK-ID: 2173879
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2000898210972823 4.9702e-08  
a 3.170359829162839 3.7574e-08 au
q 2.536003098131636 1.5089e-07 au
i 16.25286520480938 6.2329e-06 deg
node 31.41067848315977 2.0213e-05 deg
peri 248.5201739381446 2.5205e-05 deg
M 193.2172771784046 1.5395e-05 deg
tp 2459955.734106638222
(2023-Jan-11.23410664)
9.3254e-05 TDB
period 2061.869914173345
5.65
3.6655e-05
1.004e-07
d
yr
n .1745987938062198 3.1039e-09 deg/d
Q 3.804716560194042 4.5092e-08 au
  Orbit Determination Parameters
   # obs. used (total)      286  
   data-arc span      6315 days (17.29 yr)  
   first obs. used      2001-09-19  
   last obs. used      2019-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .617  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 15:35:57  

Additional Information
 Earth MOID = 1.57414 au 
 Jupiter MOID = 1.56301 au 
 T_jup = 3.110 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457316.5 (2015-Oct-21.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2008638640453345 4.9991e-08  
q 2.535880826976812 1.5191e-07 au
tp 2457890.965839093254
(2017-May-17.46583909)
8.5645e-05 TDB
node 31.48316347343457 2.0242e-05 deg
peri 247.8501701421409 2.5117e-05 deg
i 16.23720274161968 6.2285e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      286  
   data-arc span      6315 days (17.29 yr)  
   first obs. used      2001-09-19  
   last obs. used      2019-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .617  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 15:35:57  

Additional Information
 Jupiter MOID = 1.56301 au 
 T_jup = 3.110 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.499050726502373E-15 -7.459272001486544E-15 2.345650422821666E-13 -5.991597429074104E-16 -2.186903764925499E-14 -3.613758358720842E-15
q -7.459272001486544E-15 2.307689661143866E-14 -6.869374805736556E-13 5.30489532475737E-15 1.145612391123163E-14 5.529953325392854E-15
tp 2.345650422821666E-13 -6.869374805736556E-13 7.335036505015101E-9 1.952815797157956E-11 1.301305712799569E-9 4.185566233873772E-12
node -5.991597429074104E-16 5.30489532475737E-15 1.952815797157956E-11 4.097294455605523E-10 -3.899317635483688E-10 -1.746759733892399E-11
peri -2.186903764925499E-14 1.145612391123163E-14 1.301305712799569E-9 -3.899317635483688E-10 6.308861745882786E-10 1.7499750201855E-11
i -3.613758358720842E-15 5.529953325392854E-15 4.185566233873772E-12 -1.746759733892399E-11 1.7499750201855E-11 3.879482122602246E-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 15.4   n/a MPO469864  

173879 (2001 UR42)          Discovered 2001-Oct-17 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Alternate Designations
 2001 UR42 = 2005 GK23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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