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120876 (1998 RM31)
Classification: Main-belt Asteroid          SPK-ID: 2120876
[ 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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05345448314163154 4.3726e-08  
a 3.176901368709526 3.3386e-08 au
q 3.007081748053216 1.4722e-07 au
i 9.490599566621162 6.0094e-06 deg
node 202.910249138834 2.7671e-05 deg
peri 226.6315269073991 7.1307e-05 deg
M 231.2282085268485 6.9108e-05 deg
tp 2459740.313516015618
(2022-Jun-09.81351602)		 0.00040323 TDB
period 2068.254721929159
5.66		 3.2603e-05
8.926e-08		 d
yr
n .174059798429572 2.7438e-09 deg/d
Q 3.346720989365835 3.517e-08 au
   Orbit Determination Parameters
   # obs. used (total)      571  
   data-arc span      7929 days (21.71 yr)  
   first obs. used      1998-09-14  
   last obs. used      2020-05-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56335  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 01:57:43  

Additional Information
 Earth MOID = 2.0291 au 
 Jupiter MOID = 1.88131 au 
 T_jup = 3.177 
[ 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 14.6   n/a MPO348205  
diameter diameter 8.070 km 1.241 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.043   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

120876 (1998 RM31)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 RM31 = 2001 FT105 = 2004 RM195 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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