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JPL Small-Body Database Browser
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173744 (2001 RP21)
Classification: Main-belt Asteroid          SPK-ID: 2173744
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1992247361200956 5.8116e-08  
a 2.693566226292796 2.0514e-08 au
q 2.156941205637612 1.5101e-07 au
i 7.984924825920632 6.4023e-06 deg
node 156.8907191238539 4.8353e-05 deg
peri 137.7853018276 5.252e-05 deg
M 26.745557991422 2.4224e-05 deg
tp 2458480.539276603688
(2018-Dec-28.03927660)
0.00010813 TDB
period 1614.692818767257
4.42
1.8446e-05
5.05e-08
d
yr
n .222952623443785 2.5469e-09 deg/d
Q 3.23019124694798 2.46e-08 au
  Orbit Determination Parameters
   # obs. used (total)      268  
   data-arc span      9006 days (24.66 yr)  
   first obs. used      1995-03-01  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61666  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 19:48:20  

Additional Information
 Earth MOID = 1.14829 au 
 Jupiter MOID = 2.0308 au 
 T_jup = 3.328 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457211.5 (2015-Jul-08.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2001686895787557 5.7967e-08  
q 2.154205657683947 1.5073e-07 au
tp 2456867.501007213464
(2014-Jul-29.00100721)
0.00010261 TDB
node 156.9407051430563 4.831e-05 deg
peri 138.0930515003448 5.2462e-05 deg
i 7.989151248474543 6.4072e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      268  
   data-arc span      9006 days (24.66 yr)  
   first obs. used      1995-03-01  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61666  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 19:48:20  

Additional Information
 Jupiter MOID = 2.0308 au 
 T_jup = 3.328 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.360115587382823E-15 -8.693356247038473E-15 1.77012498409634E-12 2.138818390322199E-14 2.045173055281132E-13 9.352593388590228E-16
q -8.693356247038473E-15 2.271946293448862E-14 -4.439556270622217E-12 -5.442435988321574E-14 -4.892410618771073E-13 -2.119995576610713E-15
tp 1.77012498409634E-12 -4.439556270622217E-12 1.052874848950913E-8 4.055611713228366E-11 2.144189930289145E-9 -1.163791122976052E-11
node 2.138818390322199E-14 -5.442435988321574E-14 4.055611713228366E-11 2.333889529073522E-9 -2.302930949589121E-9 1.086428402417158E-10
peri 2.045173055281132E-13 -4.892410618771073E-13 2.144189930289145E-9 -2.302930949589121E-9 2.752243094886892E-9 -1.101098829394065E-10
i 9.352593388590228E-16 -2.119995576610713E-15 -1.163791122976052E-11 1.086428402417158E-10 -1.101098829394065E-10 4.105281497989844E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO449899  
diameter diameter 3.319 km 0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.037   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

173744 (2001 RP21)          Discovered 2001-Sep-07 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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