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JPL Small-Body Database Browser
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91174 (1998 RC18)
Classification: Main-belt Asteroid          SPK-ID: 2091174
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .308560064043411 6.2151e-08  
a 3.064621328355211 2.4631e-08 au
q 2.119001575009124 1.9693e-07 au
i 12.26572285901236 6.9528e-06 deg
node 1.319895215064722 2.52e-05 deg
peri 310.7077061722869 2.6475e-05 deg
M 31.96276070557731 8.8784e-06 deg
tp 2458826.517551250384
(2019-Dec-09.01755125)
4.7193e-05 TDB
period 1959.582969906992
5.37
2.3624e-05
6.468e-08
d
yr
n .1837125579924216 2.2148e-09 deg/d
Q 4.010241081701298 3.2231e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1103  
   data-arc span      13491 days (36.94 yr)  
   first obs. used      1982-09-26  
   last obs. used      2019-09-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53364  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:25:09  

Additional Information
 Earth MOID = 1.12892 au 
 Jupiter MOID = 1.47952 au 
 T_jup = 3.125 
[ 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 14.0   n/a MPO439642  
diameter diameter 4.288 km 0.321 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.382   0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91174 (1998 RC18)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1998 RC18 = 1982 SL10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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