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JPL Small-Body Database Browser
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66491 (1999 RG54)
Classification: Main-belt Asteroid          SPK-ID: 2066491
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3160084530928775 4.3768e-08  
a 2.441158508114734 1.1306e-08 au
q 1.66973178421088 1.0706e-07 au
i 3.765717817554 5.253e-06 deg
node 98.0835818860006 7.2856e-05 deg
peri 281.4198694020047 7.3598e-05 deg
M 131.6397934512614 1.5562e-05 deg
tp 2458491.078713958320
(2019-Jan-07.57871396)
5.7274e-05 TDB
period 1393.132412068878
3.81
9.6778e-06
2.65e-08
d
yr
n .2584104690130498 1.7951e-09 deg/d
Q 3.212585232018587 1.4878e-08 au
  Orbit Determination Parameters
   # obs. used (total)      662  
   data-arc span      12570 days (34.41 yr)  
   first obs. used      1984-09-05  
   last obs. used      2019-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58858  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:46:23  

Additional Information
 Earth MOID = .677355 au 
 Jupiter MOID = 2.25473 au 
 T_jup = 3.428 
[ show covariance matrix ]

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 15.7   n/a MPO453061  
rotation period rot_per 2.868 h n/a LCDB (Rev. 2019-August); 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.]

66491 (1999 RG54)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RG54 = 1984 RL = 1993 BD10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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