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JPL Small-Body Database Browser
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66545 (1999 RJ120)
Classification: Main-belt Asteroid          SPK-ID: 2066545
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1871394121417984 6.3704e-08  
a 2.544904990473198 1.5469e-08 au
q 2.068652966599315 1.6516e-07 au
i 1.887502958237574 6.2626e-06 deg
node 174.9951902173351 0.00017289 deg
peri 186.207627234454 0.00017389 deg
M 19.08461074107793 2.4519e-05 deg
tp 2458921.888407824022
(2020-Mar-13.38840782)
0.00010058 TDB
period 1482.879245864751
4.06
1.352e-05
3.702e-08
d
yr
n .2427709478057087 2.2135e-09 deg/d
Q 3.021157014347082 1.8364e-08 au
  Orbit Determination Parameters
   # obs. used (total)      492  
   data-arc span      8819 days (24.15 yr)  
   first obs. used      1995-09-25  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56579  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 07:00:28  

Additional Information
 Earth MOID = 1.06569 au 
 Jupiter MOID = 2.43351 au 
 T_jup = 3.418 
[ 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 15.6   n/a MPO445649  
rotation period rot_per 14.8 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:
[Chang, C.-K.; Ip, W.-H.; Cheng, Y.-C.; Ngeow, C.-C.; et al. (2014) Astrophys. J. 788, A17.]

66545 (1999 RJ120)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RJ120 = 2001 BK24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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