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109663 (2001 RO18)
Classification: Main-belt Asteroid          SPK-ID: 2109663
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2417766090207359 6.2366e-08  
a 3.038374517172686 2.393e-08 au
q 2.303766629475658 1.9687e-07 au
i .8495851587505775 6.4032e-06 deg
node 332.0947982353818 0.00032857 deg
peri 23.80719424508754 0.00032873 deg
M 102.1163478857618 9.2617e-06 deg
tp 2458051.777008182717
(2017-Oct-25.27700818)
4.803e-05 TDB
period 1934.46280780832
5.30
2.2853e-05
6.257e-08
d
yr
n .1860981759622805 2.1985e-09 deg/d
Q 3.772982404869714 2.9715e-08 au
  Orbit Determination Parameters
   # obs. used (total)      532  
   data-arc span      8148 days (22.31 yr)  
   first obs. used      1996-10-18  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54876  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 12:54:56  

Additional Information
 Earth MOID = 1.29853 au 
 Jupiter MOID = 1.67458 au 
 T_jup = 3.195 
[ 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 15.3   n/a MPO257515  
diameter diameter 6.510 km 1.241 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.84 h n/a LCDB (Rev. 2019-January); 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.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
geometric albedo albedo 0.035   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

109663 (2001 RO18)          Discovered 2001-Sep-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2001 RO18 = 2001 SL349 = 2004 CO43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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