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46339 (2001 RU81)
Classification: Main-belt Asteroid          SPK-ID: 2046339
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08989295216165094 5.2331e-08  
a 2.737283527825003 1.3098e-08 au
q 2.491221030605355 1.4213e-07 au
i 3.922923332730227 6.067e-06 deg
node 3.665906534198564 5.5124e-05 deg
peri 347.3149607263523 5.9703e-05 deg
M 359.0482102300348 2.2816e-05 deg
tp 2458604.873374160473
(2019-May-01.37337416)
0.00010484 TDB
period 1654.16223986906
4.53
1.1872e-05
3.25e-08
d
yr
n .2176328242316164 1.562e-09 deg/d
Q 2.983346025044652 1.4275e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1220  
   data-arc span      8478 days (23.21 yr)  
   first obs. used      1996-09-11  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55692  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 03:16:09  

Additional Information
 Earth MOID = 1.48461 au 
 Jupiter MOID = 2.39418 au 
 T_jup = 3.342 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456214.5 (2012-Oct-14.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09238879589137713 5.2597e-08  
q 2.484118490631962 1.4323e-07 au
tp 2456944.450119148411
(2014-Oct-13.95011915)
0.00010071 TDB
node 3.754271434181236 5.4961e-05 deg
peri 346.1756657372882 5.9301e-05 deg
i 3.931422093464009 6.0723e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1220  
   data-arc span      8478 days (23.21 yr)  
   first obs. used      1996-09-11  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55692  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 03:16:09  

Additional Information
 Jupiter MOID = 2.39418 au 
 T_jup = 3.342 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.766411862583785E-15 -7.507812361346283E-15 1.579299258975253E-12 3.598118731765698E-15 3.094077337007528E-13 -1.096880481693116E-15
q -7.507812361346283E-15 2.051415154917194E-14 -4.302941305149132E-12 -1.009553293168596E-14 -8.552603710788086E-13 3.126878765852203E-15
tp 1.579299258975253E-12 -4.302941305149132E-12 1.014156604370772E-8 5.473348999580031E-12 2.248972416663093E-9 -2.126742084727329E-12
node 3.598118731765698E-15 -1.009553293168596E-14 5.473348999580031E-12 3.020755438899133E-9 -3.012030250600891E-9 4.336740695207652E-11
peri 3.094077337007528E-13 -8.552603710788086E-13 2.248972416663093E-9 -3.012030250600891E-9 3.516568935553664E-9 -4.373854442067293E-11
i -1.096880481693116E-15 3.126878765852203E-15 -2.126742084727329E-12 4.336740695207652E-11 -4.373854442067293E-11 3.687258740216502E-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 14.3   n/a MPO319638  
diameter diameter 4.035 km 0.462 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 4.180 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.227   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

46339 (2001 RU81)          Discovered 2001-Sep-14 by JPL/GEODSS NEAT at Palomar
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2001 RU81 = 1996 TH53 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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