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101924 (1999 RD18)
Classification: Main-belt Asteroid          SPK-ID: 2101924
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1434681652735817 3.8074e-08  
a 2.27928434216298 6.9869e-09 au
q 1.952279599456054 8.6013e-08 au
i 6.156494131323478 3.9508e-06 deg
node 173.4524103257938 4.0464e-05 deg
peri 202.5424229261452 4.3117e-05 deg
M 346.4701173511315 1.5475e-05 deg
tp 2459047.737588271600
(2020-Jul-17.23758827)
5.4123e-05 TDB
period 1256.88686436597
3.44
5.7793e-06
1.582e-08
d
yr
n .286421960644485 1.317e-09 deg/d
Q 2.606289084869906 7.9893e-09 au
  Orbit Determination Parameters
   # obs. used (total)      774  
   data-arc span      8717 days (23.87 yr)  
   first obs. used      1996-12-17  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53552  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:45  

Additional Information
 Earth MOID = .954533 au 
 Jupiter MOID = 2.85707 au 
 T_jup = 3.585 
[ 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 16.0   n/a MPO280452  
rotation period rot_per 4.231 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.]

101924 (1999 RD18)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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