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21708 Mulhall (1999 RV90)
Classification: Main-belt Asteroid          SPK-ID: 2021708
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05907900732029362 3.6507e-08  
a 2.619747817899877 1.4672e-08 au
q 2.464975717388846 9.7846e-08 au
i 6.299180010505798 3.9381e-06 deg
node 142.4132041112857 4.4034e-05 deg
peri 194.4418279187728 6.2392e-05 deg
M 244.6578891492705 4.6459e-05 deg
tp 2459096.718614852688
(2020-Sep-04.21861485)
0.00020153 TDB
period 1548.77260377308
4.24
1.3011e-05
3.562e-08
d
yr
n .2324421281232488 1.9527e-09 deg/d
Q 2.774519918410907 1.5538e-08 au
  Orbit Determination Parameters
   # obs. used (total)      967  
   data-arc span      8234 days (22.54 yr)  
   first obs. used      1997-01-31  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56352  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:32:29  

Additional Information
 Earth MOID = 1.4545 au 
 Jupiter MOID = 2.45577 au 
 T_jup = 3.394 
[ 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 14.9   n/a MPO474051  
diameter diameter 5.015 km 0.206 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.102   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21708 Mulhall           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Michael Mulhall (b. 1987) was awarded first place in the 2005 Intel International Science and Engineering Fair for his physics team project. He attends the Synge Street CBS Secondary School, Dublin, Ireland.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050822/MPCPages.arcLast Updated: 2005-08-26

Alternate Designations
 1999 RV90 = 1998 KS59 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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