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21763 (1999 RR201)
Classification: Main-belt Asteroid          SPK-ID: 2021763
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1630791743647853 2.2351e-08  
a 2.781788251555358 1.4417e-08 au
q 2.328136520234051 6.2929e-08 au
i 11.68429304742382 1.0969e-06 deg
node 294.217824699793 4.7282e-06 deg
peri 102.0695750284035 8.4156e-06 deg
M 181.7038247231182 1.0941e-05 deg
tp 2460039.813205122628
(2023-Apr-05.31320512)
5.5275e-05 TDB
period 1694.6676134523
4.64
1.3174e-05
3.607e-08
d
yr
n .2124310378874972 1.6514e-09 deg/d
Q 3.235439982876665 1.6768e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1672  
   data-arc span      15308 days (41.91 yr)  
   first obs. used      1979-04-24  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44827  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:16:11  

Additional Information
 Earth MOID = 1.36846 au 
 Jupiter MOID = 2.27306 au 
 T_jup = 3.283 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457139.5 (2015-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .161088576952042 2.2422e-08  
q 2.336970356574386 6.316e-08 au
tp 2456650.475517424821
(2013-Dec-23.97551742)
4.4496e-05 TDB
node 294.2967376961682 4.7199e-06 deg
peri 102.5038657945635 8.4422e-06 deg
i 11.68654669290127 1.0973e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1672  
   data-arc span      15308 days (41.91 yr)  
   first obs. used      1979-04-24  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44827  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:16:11  

Additional Information
 Jupiter MOID = 2.27306 au 
 T_jup = 3.283 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.027272794262732E-16 -1.389888534297211E-15 7.350862519357987E-13 -6.702951307968706E-15 1.0695682789516E-13 -6.827400444799846E-15
q -1.389888534297211E-15 3.989123609753133E-15 -1.954432867529551E-12 1.855817336924197E-14 -2.719667862260747E-13 1.845199012691936E-14
tp 7.350862519357987E-13 -1.954432867529551E-12 1.979934627297556E-9 4.901399381547806E-12 3.147094289568381E-10 2.119098209931655E-12
node -6.702951307968706E-15 1.855817336924197E-14 4.901399381547806E-12 2.227749425988321E-11 -1.967487252328985E-11 1.97427180340551E-12
peri 1.0695682789516E-13 -2.719667862260747E-13 3.147094289568381E-10 -1.967487252328985E-11 7.127114400575387E-11 -9.224289521972301E-13
i -6.827400444799846E-15 1.845199012691936E-14 2.119098209931655E-12 1.97427180340551E-12 -9.224289521972301E-13 1.203988343618438E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.33   n/a E2021B10  
diameter diameter 5.813 km 0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.330   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21763 (1999 RR201)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RR201 = 1985 SK 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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