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JPL Small-Body Database Browser
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18042 (1999 RF27)
Classification: Main-belt Asteroid          SPK-ID: 2018042
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .250451405339072 3.455e-08  
a 2.612509031939938 1.1375e-08 au
q 1.958202473429562 8.7431e-08 au
i 8.034268197553835 4.6926e-06 deg
node 140.4517921877289 2.6835e-05 deg
peri 71.36296860915232 2.8673e-05 deg
M 21.10299683171343 1.0922e-05 deg
tp 2458510.087857537234
(2019-Jan-26.58785754)
4.6496e-05 TDB
period 1542.357777246224
4.22
1.0073e-05
2.758e-08
d
yr
n .2334088791270957 1.5244e-09 deg/d
Q 3.266815590450315 1.4224e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1642  
   data-arc span      25106 days (68.74 yr)  
   first obs. used      1951-02-04  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50152  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:11:23  

Additional Information
 Earth MOID = .971069 au 
 Jupiter MOID = 1.75237 au 
 T_jup = 3.350 
[ 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 13.4   n/a MPO439218  
diameter diameter 7.556 km 2.455 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 7.2998 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.135   0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

18042 (1999 RF27)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RF27 = 1989 ET11 = 1998 MR26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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