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66504 (1999 RN81)
Classification: Main-belt Asteroid          SPK-ID: 2066504
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1902029478275496 6.0675e-08  
a 2.559656134427189 1.3338e-08 au
q 2.072801992234267 1.5442e-07 au
i 3.476625884588116 7.0495e-06 deg
node 341.2875721908866 7.5292e-05 deg
peri 343.6134500314786 7.6656e-05 deg
M 86.78122274294805 1.9177e-05 deg
tp 2458839.926230637215
(2019-Dec-22.42623064)
7.7537e-05 TDB
period 1495.790827413192
4.10
1.1691e-05
3.201e-08
d
yr
n .2406753627594982 1.8812e-09 deg/d
Q 3.04651027662011 1.5875e-08 au
  Orbit Determination Parameters
   # obs. used (total)      581  
   data-arc span      10237 days (28.03 yr)  
   first obs. used      1993-01-22  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60644  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:22:45  

Additional Information
 Earth MOID = 1.05921 au 
 Jupiter MOID = 2.28815 au 
 T_jup = 3.407 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.62   n/a MPCxxxxx  
rotation period rot_per 3.72 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

66504 (1999 RN81)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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