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21570 Muralidhar (1998 RK33)
Classification: Main-belt Asteroid          SPK-ID: 2021570
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1399587988940202 2.4295e-08  
a 2.591091272995292 1.0913e-08 au
q 2.228445250602093 6.2404e-08 au
i 13.16939012420075 1.3053e-06 deg
node 1.975270452923483 2.8785e-06 deg
peri 254.1564555446603 6.59e-06 deg
M 195.9371483862078 7.6745e-06 deg
tp 2459894.772957285005
(2022-Nov-11.27295728)
3.5223e-05 TDB
period 1523.429967016313
4.17
9.6248e-06
2.635e-08
d
yr
n .2363088607906746 1.493e-09 deg/d
Q 2.953737295388491 1.2441e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1764  
   data-arc span      11091 days (30.37 yr)  
   first obs. used      1990-10-10  
   last obs. used      2021-02-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48338  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 03:01:05  

Additional Information
 Earth MOID = 1.25594 au 
 Jupiter MOID = 2.19775 au 
 T_jup = 3.369 
[ 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 13.85   n/a E2021B10  
diameter diameter 17.78 km 1.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
geometric albedo albedo 0.0203   0.005 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2

21570 Muralidhar           Discovered 1998 Sept. 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Vinayak Muralidhar (b. 1989) was awarded second place in the 2006 Intel International Science and Engineering Fair for his computer science team project. He attends the Hamilton High School, Chandler, Arizona, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

Alternate Designations
 1998 RK33 = 1994 SK3 = 1997 EF49 = 1998 TF30 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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