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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2506087341708751 3.4525e-08  
a 2.61096084258295 1.1504e-08 au
q 1.956631250853516 8.7265e-08 au
i 8.038098072989158 4.6948e-06 deg
node 140.4368753020491 2.6818e-05 deg
peri 71.20862831894281 2.866e-05 deg
M 114.6504980179808 1.1274e-05 deg
tp 2458509.736325402805
(2019-Jan-26.23632540)
4.651e-05 TDB
period 1540.986963940461
4.22
1.0184e-05
2.788e-08
d
yr
n .233616512289918 1.544e-09 deg/d
Q 3.265290434312385 1.4387e-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 = .96932 au 
 Jupiter MOID = 1.75267 au 
 T_jup = 3.351 
[ 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-August); 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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