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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05346031450703068 4.0548e-08  
a 3.173087798969902 3.1453e-08 au
q 3.003453527278549 1.4005e-07 au
i 9.497500245664533 4.6425e-06 deg
node 202.7802897758023 2.7633e-05 deg
peri 228.1903188636628 7.0094e-05 deg
M 264.5738208821563 6.8739e-05 deg
tp 2459747.751038972267
(2022-Jun-17.25103897)		 0.00039928 TDB
period 2064.531723382993
5.65		 3.0697e-05
8.404e-08		 d
yr
n .1743736828660085 2.5927e-09 deg/d
Q 3.342722070661255 3.3135e-08 au
   Orbit Determination Parameters
   # obs. used (total)      622  
   data-arc span      8008 days (21.92 yr)  
   first obs. used      1998-09-14  
   last obs. used      2020-08-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54916  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:54:05  

Additional Information
 Earth MOID = 2.02561 au 
 Jupiter MOID = 1.88004 au 
 T_jup = 3.178 
[ 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 14.66   n/a E2021B55  
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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