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18846 (1999 RB28)
Classification: Main-belt Asteroid          SPK-ID: 2018846
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04131754594814672 2.3037e-08  
a 2.658731712045924 1.0011e-08 au
q 2.548879442369671 6.4174e-08 au
i 15.62699540056184 6.2974e-07 deg
node 164.6909961041888 2.641e-06 deg
peri 143.7799616503739 1.4663e-05 deg
M 338.4818041795876 1.448e-05 deg
tp 2459295.148460627869
(2021-Mar-21.64846063)
6.3673e-05 TDB
period 1583.471314714506
4.34
8.9434e-06
2.449e-08
d
yr
n .2273486084999946 1.2841e-09 deg/d
Q 2.768583981722176 1.0425e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2208  
   data-arc span      9168 days (25.10 yr)  
   first obs. used      1995-08-24  
   last obs. used      2020-09-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48257  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:39:31  

Additional Information
 Earth MOID = 1.54639 au 
 Jupiter MOID = 2.37422 au 
 T_jup = 3.333 
[ 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 13.63   n/a E2021B10  
diameter diameter 5.574 km 0.302 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.248   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18846 (1999 RB28)          Discovered 1999-Sep-08 by Klet at Klet
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RB28 = 1998 FW144 = 1999 NT59 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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