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22820 (1999 RM31)
Classification: Main-belt Asteroid          SPK-ID: 2022820
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1011422109522346 6.5678e-08  
a 2.70787740647418 1.3614e-08 au
q 2.433996698595779 1.7879e-07 au
i 14.587316187916 6.0973e-06 deg
node 6.417908964742367 1.5613e-05 deg
peri 2.141527639350699 2.5102e-05 deg
M 274.1305242301564 2.1483e-05 deg
tp 2459588.720295362880
(2022-Jan-09.22029536)
9.8163e-05 TDB
period 1627.578427347506
4.46
1.2274e-05
3.36e-08
d
yr
n .2211874979116666 1.6681e-09 deg/d
Q 2.981758114352581 1.4991e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1296  
   data-arc span      10879 days (29.79 yr)  
   first obs. used      1990-09-14  
   last obs. used      2020-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50828  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:13:24  

Additional Information
 Earth MOID = 1.43147 au 
 Jupiter MOID = 2.47908 au 
 T_jup = 3.311 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.35   n/a E2021B10  
diameter diameter 3.161 km 0.769 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.369   0.203 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22820 (1999 RM31)          Discovered 1999-Sep-09 by Korlevic, K. at Visnjan
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RM31 = 1990 RC13 = 2000 XZ34 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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